Electric pile waste heat recovery system control method, electronic equipment and automobile

Abstract

The invention discloses a pile waste heat recovery system control method, electronic equipment and an automobile, and relates to the technical field of automobiles. The method is applied to a controller in an electric pile waste heat recovery system. The method comprises the following steps: in response to a heating request sent by an air conditioning system, collecting and obtaining a cooling liquid temperature at a cooling liquid outlet of a fuel cell stack; when the cooling liquid temperature at the cooling liquid outlet of the fuel cell stack reaches a preset starting temperature threshold value, a water valve is controlled to be opened, a water pump is controlled to start running, and the sending flow of the water pump is controlled according to a preset algorithm; according to the method, when the temperature of the cooling liquid at the cooling liquid outlet of the fuel cell stack is sufficient, a water valve and a water pump in the stack waste heat recovery system are started, and the sending flow of the water pump is controlled through a preset algorithm so as to control the heat exchange speed at an air conditioning system, so that local overcooling or overheating of a cooling loop of the fuel cell stack is avoided; therefore, the stability of the stack waste heat recovery system in the fuel cell waste heat recovery process is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a control method for a battery stack waste heat recovery system, an electronic device and an automobile. Background Art

[0002] Fuel cell waste heat recovery refers to the collection, processing and conversion of waste heat generated during the fuel cell power generation process through various technical means, and converting it into useful energy. This method can reduce energy waste and improve energy utilization, thereby achieving the goal of sustainable development. This technology is currently widely used in air conditioning and heating of vehicles equipped with fuel cells.

[0003] In current fuel cell waste heat recovery schemes, a four-way valve is usually set in the fuel cell stack cooling circuit. The four-way valve is adjusted through calculation based on the collected temperature, power generation and other data to control the fuel cell stack cooling circuit to enter different waste heat recovery modes.

[0004] However, when adopting the above-mentioned fuel cell waste heat recovery solution, the four-way valve may cause local overcooling or overheating of the fuel cell stack cooling circuit, thereby causing safety hazards in the stack waste heat recovery system. Summary of the invention

[0005] The main purpose of this application is to propose a control method for a fuel cell stack waste heat recovery system, an electronic device and a vehicle, aiming to avoid local overcooling or overheating of the fuel cell stack cooling circuit, thereby improving the stability of the fuel cell stack waste heat recovery system during the fuel cell waste heat recovery process.

[0006] In a first aspect, the present invention provides a control method for a waste heat recovery system of a fuel cell stack, the method being applied to a controller in the waste heat recovery system of the fuel cell stack, the waste heat recovery system of the fuel cell stack comprising: a controller, a fuel cell stack, an air conditioning system, a water valve, a water pump, and a heat exchanger; the controller is communicatively connected with the air conditioning system, the fuel cell stack, the water valve, and the water pump; the fuel cell stack is connected with the heat exchanger through a pipeline, wherein the coolant outlet of the fuel cell stack is connected with the first coolant inlet of the heat exchanger, the first coolant outlet of the heat exchanger is connected with the coolant inlet of the fuel cell stack, and the water valve is arranged between the coolant outlet of the fuel cell stack and the first coolant inlet of the heat exchanger; the method comprises: receiving a heating request sent by the air conditioning system; According to the heating request, collecting and obtaining the coolant temperature at the coolant outlet of the fuel cell stack; When the coolant temperature at the coolant outlet of the fuel cell stack is greater than or equal to a preset start-up temperature threshold, the water valve is controlled to open and the water pump is controlled to start running, and the delivery flow of the water pump is controlled according to a preset algorithm.

[0007] In an optional embodiment, the heating request of the air conditioning system includes: setting a target temperature; The step of controlling the sending flow of the water pump according to a preset algorithm comprises: Determining a plurality of control parameters according to the set target temperature, wherein the control parameters are used to indicate flow rate changes per cycle; Calculate and obtain a sending flow adjustment value according to the plurality of control parameters and a preset calculation formula; The sending flow rate of the water pump is controlled according to the sending flow rate adjustment value.

[0008] In an optional implementation manner, the control parameters include: A, B, C, and A is calculated by the following formula: ; The B is calculated by the following formula: ; The C is calculated by the following formula: ; in, is the preset intermediate value, To adjust the cycle, and To adjust the parameters.

[0009] In an optional embodiment, the air conditioning system includes: a warm air core, a cab air conditioner, and an air conditioning compressor; The heater core is connected to the heat exchanger through the pipeline, wherein the second coolant outlet of the heat exchanger is connected to the coolant inlet of the heater core, the coolant outlet of the heater core is connected to the second coolant inlet of the heat exchanger, and the water pump is arranged between the second coolant outlet of the heat exchanger and the coolant inlet of the heater core.

[0010] In an optional embodiment, the stack waste heat recovery system further includes: a heater, which is disposed between the second coolant outlet of the heat exchanger and the coolant inlet of the heater core and is communicatively connected to the controller; the method further includes: Collecting and obtaining the air outlet temperature of the air conditioner in the cab; When the air outlet temperature of the cab air conditioner is less than or equal to the preset auxiliary heating start-up temperature threshold, controlling the heater to start; When the air outlet temperature of the cab air conditioner is greater than a preset auxiliary heating shutdown temperature threshold, the heater is controlled to be turned off.

[0011] In an optional embodiment, the method further comprises: When the coolant temperature at the coolant outlet of the fuel cell stack is less than or equal to a preset stop temperature threshold, the water valve is controlled to close.

[0012] In an optional embodiment, after controlling the water valve to close, the method further includes: The air-conditioning compressor is controlled to start, and the delivery flow rate of the water pump is controlled to be adjusted to a preset delivery flow rate.

[0013] In an optional embodiment, the stack waste heat recovery system further includes: an expansion water tank; The expansion water tank is arranged between the coolant outlet of the heat exchanger and the coolant inlet of the heater core.

[0014] In a second aspect, the present invention provides an electronic device, comprising: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, the processor and the storage medium communicate via the bus, and the processor executes the machine-readable instructions to perform a method as described in any of the foregoing embodiments.

[0015] In a third aspect, the present invention provides a car, comprising the electronic device as described in the above embodiment.

[0016] The beneficial effects of this application are: The control method of the waste heat recovery system of the fuel cell stack provided in the embodiment of the present application is applied to the controller in the waste heat recovery system of the fuel cell stack, and the waste heat recovery system of the fuel cell stack includes: a controller, a fuel cell stack, an air conditioning system, a water valve, and a water pump; the controller is communicatively connected with the air conditioning system, the fuel cell stack, the water valve, and the water pump; the coolant outlet of the fuel cell stack is connected with the coolant inlet of the heat exchanger, and the water valve is arranged between the coolant outlet of the fuel cell stack and the coolant inlet of the heat exchanger; the method includes: receiving a heating request sent by the air conditioning system; according to the heating request, collecting and acquiring the coolant temperature at the coolant outlet of the fuel cell stack; when the fuel cell stack When the coolant temperature at the coolant outlet of the stack is greater than or equal to a preset starting temperature threshold, the water valve is controlled to open and the water pump is controlled to start running, and the delivery flow of the water pump is controlled according to a preset algorithm; the method opens the water valve and the water pump in the waste heat recovery system of the fuel cell stack when the coolant temperature at the coolant outlet of the fuel cell stack is sufficient to start the heat exchange between the fuel cell stack cooling circuit and the circuit where the air-conditioning system is located, and then uses the waste heat of the stack for heating the air-conditioning system, and controls the delivery flow of the water pump through a preset algorithm to control the heat exchange speed at the air-conditioning system, thereby avoiding local overcooling or overheating of the fuel cell stack cooling circuit, thereby improving the stability of the fuel cell stack cooling circuit during the fuel cell waste heat recovery process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of a waste heat recovery system for a fuel cell stack provided in one embodiment of the present application; Figure 2 A schematic flow chart of a control method for a stack waste heat recovery system according to an embodiment of the present application; Figure 3 A schematic flow chart of a control method for a stack waste heat recovery system provided in another embodiment of the present application; Figure 4 A schematic flow chart of a control method for a stack waste heat recovery system provided in yet another embodiment of the present application; Figure 5 A schematic diagram of the structure of a control device for a waste heat recovery system of a fuel cell stack provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0019] Reference numerals: 1- fuel cell stack; 2- heat exchanger; 3- water valve; 4- water pump; 5- heater; 6- expansion water tank; 7- heater core; 8- cab air conditioner; 9- air conditioner compressor; 11- coolant inlet of fuel cell stack; 12- coolant outlet of fuel cell stack; 21- first coolant inlet of heat exchanger; 22- first coolant outlet of heat exchanger; 23- second coolant outlet of heat exchanger; 24- second coolant inlet of heat exchanger; 71- coolant inlet of heater core; 72- coolant outlet of heater core. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. The terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the statement "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device that includes the element.

[0023] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0024] The current fuel cell waste heat recovery scheme usually controls a four-way valve arranged in the fuel cell stack cooling circuit to circulate different circuits in the above-mentioned fuel cell stack cooling circuit, so as to realize the fuel cell stack cooling circuit to execute different waste heat recovery modes. However, it is found in actual applications that the fuel cell waste heat recovery scheme controls the fuel cell stack cooling circuit through a four-way valve, which may cause local overcooling or overheating of the fuel cell stack cooling circuit, and thus may affect the stability of the stack waste heat recovery system, posing a safety hazard. The main purpose of this application is to avoid local overcooling or overheating of the fuel cell stack cooling circuit, thereby improving the stability of the stack waste heat recovery system during the fuel cell waste heat recovery process.

[0025] Figure 1 A schematic diagram of the structure of a waste heat recovery system for a fuel cell stack according to an embodiment of the present application is shown in FIG. Figure 1 As shown, the stack waste heat recovery system may include: a controller (not shown in the figure), a fuel cell stack 1, an air conditioning system, a water valve 3, a water pump 4, and a heat exchanger 2. The controller is in communication with the air conditioning system, the fuel cell stack 1, the water valve 3, and the water pump 4. The fuel cell stack 1 is connected to the heat exchanger 2 through a pipeline, wherein the coolant outlet 12 of the fuel cell stack is connected to the first coolant inlet 21 of the heat exchanger, the first coolant outlet 22 of the heat exchanger is connected to the coolant inlet 11 of the fuel cell stack, and the water valve 3 is disposed between the coolant outlet 12 of the fuel cell stack and the first coolant inlet 21 of the heat exchanger.

[0026] For example, the fuel cell stack 1 may refer to a battery group formed by connecting a plurality of fuel cell monomers in series, and the purpose of connecting a plurality of fuel cell monomers in series may be to obtain a higher output voltage, etc. As for the specific type, model, size, quantity, etc. of the fuel cell monomers, the specific series connection method between the fuel cell monomers, the performance parameters of the fuel cell stack 1, etc., they can be adjusted and determined according to actual conditions, and are not limited here.

[0027] The above-mentioned pipes can be, for example, pipes made of materials including but not limited to plastic, metal, etc., and the interior of the pipes can be filled with fluid heat-conducting media such as coolant, but the specific pipe material, size, type, model, performance parameters, etc. can be selected and determined according to actual conditions and are not limited here.

[0028] The above-mentioned controller may refer to, for example, a vehicle controller including but not limited to VCU (Vehicle Control Unit), ECU (Electronic Control Unit), etc., which has functions such as data processing and communication functions. The above-mentioned controller may also refer to a local domain controller such as MCU (Microcontroller Unit), etc., which has functions such as data processing and communication functions. The above-mentioned controller may also refer to an integrated control unit composed of the above-mentioned vehicle controller and local domain controller, etc., which has functions such as data processing and communication functions. It can be understood that when the above-mentioned controller is an integrated control unit composed of the vehicle controller and local domain controller, etc., which has functions such as data processing and communication functions, the vehicle controller and the local domain controller inside the controller may also be communicated and connected. Of course, the above-mentioned content is only a possible example. What kind of controller the above-mentioned controller specifically refers to can be selected and determined according to the actual situation, and is not limited to the above-mentioned content.

[0029] The controller is communicatively connected with the air-conditioning system, the fuel cell stack 1, the water valve 3, and the water pump 4. For example, the controller is connected with the air-conditioning system, the fuel cell stack 1, the water valve 3, and the water pump 4 through methods including but not limited to CANFD (Controller Area Network with Flexible Data rate) communication connection, CAN (Controller Area Network) communication connection, LIN (Local Interconnect Network) communication connection, etc. The controller can, for example, control the opening or closing of the water valve 3, the water pump 4, etc. and the sending flow rate of the water pump 4 through the communication connection. The controller can, for example, also obtain the coolant temperature value at the coolant outlet 12 of the fuel cell stack through the communication connection. Exemplarily, the coolant temperature value at the coolant outlet 12 of the fuel cell stack can, for example, be obtained by collecting and obtaining it through a temperature sensor disposed at the coolant outlet 12 of the fuel cell stack. The communication connection between the controller and the fuel cell stack 1 can, for example, include a communication connection between the controller and the temperature sensor. After the temperature sensor collects and obtains the coolant temperature value at the coolant outlet 12 of the fuel cell stack, for example, the collected coolant temperature value at the coolant outlet 12 of the fuel cell stack can be sent to the controller through the communication connection.

[0030] Of course, the above contents are only possible examples. The connection method between the above controller and the above air-conditioning system, the above fuel cell stack 1, the above water valve 3, and the above water pump 4 is not specifically limited here, and can be selected and determined according to actual conditions, and is not limited to the above contents.

[0031] It should be noted that Figure 1 The arrangement, relative position, relative size, connection relationship, pipeline layout, etc. of the components of the stack waste heat recovery system shown in the figure are all possible examples. The arrangement, relative position, relative size, connection relationship, pipeline layout, etc. of the components of the stack waste heat recovery system can be different from the following examples. Figure 1 Different, just adjust and determine according to the actual situation, not based on Figure 1 The content shown is limited.

[0032] The stack waste heat recovery system provided in the embodiment of the present application includes: a controller, a fuel cell stack 1, an air conditioning system, a water valve 3, a water pump 4, and a heat exchanger 2. The controller is in communication with the air conditioning system, the fuel cell stack 1, the water valve 3, and the water pump 4. The fuel cell stack 1 is connected to the heat exchanger 2 through a pipeline, wherein the coolant outlet 12 of the fuel cell stack is connected to the first coolant inlet 21 of the heat exchanger, the first coolant outlet 22 of the heat exchanger is connected to the coolant inlet 11 of the fuel cell stack, and the water valve 3 is arranged between the coolant outlet 12 of the fuel cell stack and the first coolant inlet 21 of the heat exchanger. In the stack waste heat recovery system provided in this embodiment, the water valve 3, the water pump 4, etc. are used to replace the traditional four-way valve to control the cooling circuit of the fuel cell stack 1, so as to avoid local overcooling or overheating of the cooling circuit of the fuel cell stack 1, thereby improving the stability of the cooling circuit of the fuel cell stack 1 during the fuel cell waste heat recovery process.

[0033] Figure 2 This is a flow chart of a control method for a stack waste heat recovery system provided in an embodiment of the present application. The method can be applied to Figure 1 Controllers in the stack waste heat recovery system, such as Figure 2 As shown, the method may include: S201. Receive a heating request sent by the air-conditioning system.

[0034] For example, see above Figure 1 According to the disclosed content of the embodiment, the heating request sent by the above-mentioned air-conditioning system can be, for example, when the vehicle occupants turn on the air-conditioning system through, for example, a control panel and set the air-conditioning system to operate in a heating mode, and the control panel sends it to the controller.

[0035] S202 . According to the heating request, the coolant temperature at the coolant outlet 12 of the fuel cell stack is acquired.

[0036] Please continue to refer to the above Figure 1 According to the content disclosed in the embodiment, the collecting and obtaining the coolant temperature at the coolant outlet 12 of the fuel cell stack according to the heating request may for example refer to collecting and obtaining the coolant temperature value at the coolant outlet 12 of the fuel cell stack. The coolant temperature value at the coolant outlet 12 of the fuel cell stack may for example be collected and obtained by a temperature sensor provided at the coolant outlet 12 of the fuel cell stack. The communication connection between the controller and the fuel cell stack 1 may for example include a communication connection between the controller and the temperature sensor. After the temperature sensor collects and obtains the coolant temperature value at the coolant outlet 12 of the fuel cell stack, for example, the collected and obtained coolant temperature value at the coolant outlet 12 of the fuel cell stack may be sent to the controller through the communication connection.

[0037] S203. When the coolant temperature at the coolant outlet 12 of the fuel cell stack is greater than or equal to a preset start-up temperature threshold, the water valve 3 is controlled to open and the water pump 4 is controlled to start running, and the delivery flow of the water pump 4 is controlled according to a preset algorithm. Exemplarily, when the coolant temperature at the coolant outlet 12 of the fuel cell stack is greater than or equal to the preset start temperature threshold, the water valve 3 is controlled to open and the water pump 4 is controlled to start running, and the sending flow of the water pump 4 is controlled according to the preset algorithm. For example, Figure 1 After receiving the above-mentioned heating request and other signals, the above-mentioned controller disclosed in the embodiment determines whether the waste heat recovered by the fuel cell stack waste heat recovery system can be used to heat the heater core 7 of the above-mentioned air-conditioning system through the coolant temperature value received at the coolant outlet 12 of the fuel cell stack, so as to realize heating of the cab air conditioner 8.

[0038] The above-mentioned preset start-up temperature threshold can be obtained, for example, by calculating the limit power temperature point of the fuel cell stack 1. The limit power temperature point of the fuel cell stack 1 can be one of the performance parameters of the fuel cell stack 1. The limit power temperature point of the fuel cell stack 1 can be obtained, for example, from the manual, parameter table and other materials of the fuel cell stack 1. Assuming that the limit power temperature point of the fuel cell stack 1 is t°C, the above-mentioned preset start-up temperature threshold can be, for example, t-5°C, etc. At this time, that is, when the coolant temperature at the coolant outlet 12 of the above-mentioned fuel cell stack is ≥t-5°C, the water valve 3 is controlled to open and the water pump 4 is controlled to start running, and the sending flow of the above-mentioned water pump 4 is controlled according to the preset algorithm. Of course, the above content is only a possible example. The specific method for determining the preset start-up temperature threshold can be selected and determined according to the actual situation, and is not limited to the above content.

[0039] The control of the water valve 3 to open and control the water pump 4 to start running can be achieved, for example, through the communication connection. The control of the delivery flow of the water pump 4 according to the preset algorithm can be, for example, to control the heating speed of the air-conditioning system by controlling the delivery flow of the water pump 4. It can be understood that the greater the delivery flow of the water pump 4, the more the coolant of the heat exchanger 2 transfers to the residual heat of the battery stack in the air-conditioning system. Of course, the above content is only a possible example. The specific control process and function of controlling the delivery flow of the water pump 4 according to the preset algorithm can be adjusted and determined according to actual conditions, and are not limited to the above content.

[0040] In the control method of the stack waste heat recovery system provided in this embodiment, a heating request sent by the air conditioning system is received. According to the heating request, the coolant temperature at the coolant outlet 12 of the fuel cell stack is collected and obtained. When the coolant temperature at the coolant outlet 12 of the fuel cell stack is greater than or equal to the preset start temperature threshold, the water valve 3 is controlled to open and the water pump 4 is controlled to start running, and the sending flow of the water pump 4 is controlled according to the preset algorithm. The control method of the stack waste heat recovery system provided in this embodiment opens the water valve 3 and the water pump 4 in the stack waste heat recovery system when the coolant temperature at the coolant outlet 12 of the fuel cell stack is sufficient to start the heat exchange between the cooling circuit of the fuel cell stack 1 and the circuit where the air conditioning system is located, and then the waste heat of the stack is used for heating the air conditioning system, and the sending flow of the water pump 4 is controlled by the preset algorithm to control the heat exchange speed at the air conditioning system, so as to avoid local overcooling or overheating of the cooling circuit of the fuel cell stack 1, thereby improving the stability of the cooling circuit of the fuel cell stack 1 during the fuel cell waste heat recovery process.

[0041] Figure 3 A schematic flow chart of a control method for a stack waste heat recovery system according to another embodiment of the present application is shown in FIG. Figure 3 As shown, in Figure 2 Based on the embodiment, the heating request of the air-conditioning system may include: setting a target temperature.

[0042] The above-mentioned control of the sending flow of the water pump 4 according to the preset algorithm may include: S301. Determine a plurality of control parameters according to the set target temperature, wherein the control parameters are used to indicate flow rate changes in each cycle.

[0043] Exemplarily, the set target temperature may refer to the heating target temperature value set when the vehicle occupants turn on the air-conditioning system through, for example, a control panel and set the air-conditioning system to operate in heating mode, which may be, for example, 22°C, 24°C, 26°C, etc., but is not limited thereto. The multiple control parameters determined according to the set target temperature may refer to parameters such as function coefficients obtained by calculation or table lookup based on the target temperature and relevant parameters of the stack waste heat recovery system. The cycle may be, for example, a preset duration. The flow rate change may change once per cycle. For example, when a cycle is preset to 10 seconds, the flow rate change may refer to a change every 10 seconds. When a cycle is preset to 20 seconds, the flow rate change may refer to a change every 20 seconds, etc., but is not limited thereto.

[0044] Furthermore, the above-mentioned multiple control parameters can be used in relational formulas such as functions to indicate the above-mentioned flow changes per cycle. Of course, the above-mentioned contents are only possible examples. How to determine the above-mentioned multiple control parameters and the specific form in which to indicate the flow changes per cycle can be selected and determined based on actual conditions and are not limited to the above-mentioned contents.

[0045] S302: Calculate and obtain a sending traffic adjustment value according to the multiple control parameters and a preset calculation formula.

[0046] Exemplarily, the above-mentioned preset calculation formula may refer to formulas such as the above-mentioned relationship formula such as the function, and the coefficient of the relationship formula such as the function may be the above-mentioned control parameter, and the above-mentioned sending traffic adjustment value may refer to the above-mentioned traffic change per cycle, that is, the change value of the sending traffic in the current cycle compared with the sending traffic in the previous cycle. Of course, the above content is only a possible example. The specific form of the above-mentioned preset calculation formula, the specific relationship between the above-mentioned preset calculation formula and the above-mentioned control parameters, etc. can be adjusted and determined according to actual needs, and are not limited to the above content.

[0047] S303, controlling the sending flow rate of the water pump 4 according to the sending flow rate adjustment value.

[0048] For example, if the sending flow rate of the previous cycle is 25 ml / s, and the sending flow rate adjustment value calculated according to the above control parameters and the preset calculation formula is +7 ml / s, then it can be known that the sending flow rate of the current cycle is (25+7) ml / s, that is, 32 ml / s. Of course, the above content is only a possible example, and the specific implementation of controlling the sending flow rate of the water pump 4 according to the above sending flow rate adjustment value can be selected and determined according to actual conditions, and is not limited to the above content.

[0049] In the control method of the battery stack waste heat recovery system provided in the present embodiment, a plurality of control parameters are determined according to the above-mentioned set target temperature, the above-mentioned control parameters are used to indicate the flow rate change per cycle, the sending flow rate adjustment value is calculated according to the above-mentioned control parameters and the preset calculation formula, and the sending flow rate of the above-mentioned water pump 4 is controlled according to the above-mentioned sending flow rate adjustment value. The control method of the battery stack waste heat recovery system provided in the present embodiment adjusts the sending flow rate of the water pump 4 on a periodic basis by sending the flow rate adjustment value, and realizes the heating speed of the warm air core 7 of the above-mentioned air-conditioning system by controlling the battery stack waste heat recovered by the battery stack waste heat recovery system by adjusting the sending flow rate of the water pump 4, thereby realizing more accurate and efficient heating of the air-conditioning system through the recovery of battery stack waste heat.

[0050] Furthermore, in the above Figure 3 Based on the embodiment, the above control parameters may include: A, B, C, and the above A may be calculated by the following formula: , The above B can be calculated by the following formula: , The above C can be calculated by the following formula: , in, is the preset intermediate value, To adjust the cycle, and To adjust the parameters.

[0051] Exemplarily, the above preset intermediate value and tuning parameters , For example, they may refer to the intermediate values ​​or intermediate parameters obtained in the process of obtaining the above-mentioned multiple control parameters by calculation or table lookup according to the above-mentioned target temperature and relevant parameters of the stack waste heat recovery system, that is, the , , The intermediate value or intermediate parameter is also obtained by calculation or table lookup. , , After the intermediate value or intermediate parameter of , , The intermediate values ​​or intermediate parameters of the above are used for calculation or table lookup to obtain the above-mentioned multiple control parameters such as A, B, C, etc.

[0052] The above adjustment period For example, it can refer to the cycle of the above-mentioned flow change, that is, the adjustment cycle For example, it may refer to a preset time length, corresponding to the flow change in each cycle. The collection period for acquiring the coolant temperature at the coolant outlet 12 of the fuel cell stack may also be Of course, the above contents are only possible examples. and tuning parameters , How to determine the above adjustment period The specific preset duration, etc. can be selected and determined according to actual conditions and are not limited to the above contents.

[0053] For example, based on obtaining the above control parameters A, B, and C, the above calculation based on the multiple control parameters and the preset calculation formula to obtain the sending flow adjustment value, for example, the sending flow adjustment value can be calculated based on the control parameters A, B, and C and the following preset calculation formula: , Where k is the current cycle number. For example, if the current cycle is the first cycle, k=1, and so on. That is, the sending traffic adjustment value of the kth cycle. , , They are the sending traffic of the kth period, the sending traffic of the k-1th period, and the sending traffic of the k-2th period.

[0054] The meaning of the above preset calculation formula can be, for example, to calculate the transmission flow adjustment value of the current cycle according to the transmission flow of the current cycle and the two cycles before the current cycle, a total of three cycles of transmission flow and control parameters A, B, C, that is, the transmission flow of the current cycle. + The current period's sending traffic adjustment value =Send traffic in the next cycle , the controller can send traffic in the next cycle according to the next cycle Control the delivery flow of the water pump 4. It can be understood that when k=1 or 2, that is, when the current cycle is the first cycle or the second cycle, the first two cycles of the current cycle do not exist. and / or Can be assigned a value of 0, the current cycle's sending traffic It can be set to a preset initial sending flow. Of course, the above content is only a possible example. The specific formula of the above preset calculation formula and how to calculate the above sending flow adjustment value can be adjusted and determined according to actual conditions and are not limited to the above content.

[0055] refer to Figure 1 The above-mentioned air conditioning system may include: a warm air core 7, a cab air conditioner 8, and an air conditioning compressor 9.

[0056] Exemplarily, the cab air conditioner 8 may include an air-conditioning outlet and a control panel, etc. The control panel may include physical buttons, knobs, etc., or the control panel may be a touch screen, etc. When the driver and passengers in the vehicle turn on the cab air conditioner 8 through the above-mentioned control panel and set the cab air conditioner 8 to operate in heating mode, the control panel may send signals such as heating requests to the above-mentioned controller. After receiving the above-mentioned heating request and other signals, the above-mentioned controller may, for example, determine whether the waste heat of the fuel cell stack recovered by the waste heat recovery system of the fuel cell stack can be used to heat the warm air core 7 of the above-mentioned air-conditioning system through the coolant temperature value at the coolant outlet 12 of the fuel cell stack (the specific judgment rule may, for example, be that when the coolant temperature value at the coolant outlet 12 of the above-mentioned fuel cell stack reaches a certain preset temperature value, the waste heat of the fuel cell stack recovered by the waste heat recovery system of the fuel cell stack can be used to heat the warm air core 7 of the above-mentioned air-conditioning system) to achieve heating of the cab air conditioner 8.

[0057] The specific process of the waste heat of the fuel cell stack recovered by the waste heat recovery system for heating the heater core 7 of the air-conditioning system to achieve heating of the cab air-conditioning 8 may be: when the controller determines through the received coolant temperature value at the coolant outlet 12 of the fuel cell stack that the waste heat of the fuel cell stack recovered by the waste heat recovery system can be used to heat the heater core 7 of the air-conditioning system to achieve heating of the cab air-conditioning 8, the controller can control the water valve 3 and the water pump 4 to open through the communication connection, and then the coolant with waste heat of the fuel cell stack flowing out of the coolant outlet 12 of the fuel cell stack can flow to the first coolant inlet 21 of the heat exchanger through the water valve 3, and transfer the waste heat of the fuel cell stack carried by the coolant of the fuel cell stack 1 to the coolant of the heat exchanger 2, and then the coolant of the fuel cell stack 1 can flow back to the fuel cell stack 1 through the first coolant outlet 22 of the heat exchanger and the coolant inlet 11 of the fuel cell stack to form a circulation between the fuel cell stack 1 and the heat exchanger 2.

[0058] After absorbing the waste heat of the fuel cell stack carried by the coolant of the fuel cell stack 1, the coolant of the heat exchanger 2 can be pumped into the heater core 7 by the water pump 4 through the second coolant outlet 23 of the heat exchanger and the coolant inlet 71 of the heater core. The heater core 7 can be arranged near the air outlet of the cab air conditioner 8, and the waste heat of the fuel cell stack carried by the coolant of the heat exchanger 2 can be transferred to the cab through the airflow blown out from the air outlet of the cab air conditioner 8 to realize the heating of the cab air conditioner 8. After that, the coolant of the heat exchanger 2 can flow back to the heat exchanger 2 through the coolant outlet 72 of the heater core and the second coolant inlet 24 of the heat exchanger to form a circulation between the heater core 7 and the heat exchanger 2.

[0059] Of course, the above contents are only possible examples, and the specific process of realizing the heating of the cab air conditioner 8 can be adjusted and determined according to actual conditions, and is not limited to the above contents.

[0060] Further, based on the above embodiment, Figure 1 As shown, the above-mentioned fuel cell waste heat recovery system also includes: a heater 5, which is arranged between the second coolant outlet 23 of the above-mentioned heat exchanger and the coolant inlet 71 of the above-mentioned heater core, and is communicatively connected with the above-mentioned controller.

[0061] Exemplarily, the heater 5 may refer to a PTC heater composed of a PTC (Positive Temperature Coefficient) ceramic heating element and an aluminum tube. When the heater 5 is turned on, it may heat the coolant of the heat exchanger 2 in the pipe between the second coolant outlet 23 of the heat exchanger and the coolant inlet 71 of the heater core, thereby increasing the temperature of the coolant of the heat exchanger 2 entering the heater core 7, so as to assist in enhancing the heating effect of the cab air conditioner 8.

[0062] The above-mentioned heater 5 is communicatively connected with the above-mentioned controller. For example, it may mean that the heater 5 is communicatively connected with the above-mentioned controller through methods including but not limited to CANFD (Controller Area Network with Flexible Data rate) communication connection, CAN (Controller Area Network) communication connection, LIN (Local Interconnect Network) communication connection, etc.

[0063] Whether the heater 5 is turned on can be determined and controlled by the controller. For example, the controller can obtain the temperature value at the air outlet of the cab air conditioner 8 through the communication connection. The temperature value at the air outlet of the cab air conditioner 8 can be obtained by, for example, a temperature sensor disposed at the air outlet of the cab air conditioner 8. The controller and the air conditioning system are connected in communication, for example, including a controller and the temperature sensor. After the temperature sensor collects and obtains the temperature value at the air outlet of the cab air conditioner 8, for example, the temperature value at the air outlet of the cab air conditioner 8 can be sent to the controller through the communication connection. The controller can determine whether to turn on the heater 5 based on the received temperature value at the air outlet of the cab air conditioner 8 (the specific judgment rule can be, for example, when the temperature value at the air outlet of the cab air conditioner 8 is lower than a preset temperature value, the controller can control the heater 5 to turn on through the communication connection). Of course, the above content is only a possible example. The specific model and type of the heater 5, how to turn it on, and how to achieve the heating of the coolant of the heat exchanger 2 can all be selected and determined according to actual needs, and are not limited to the above content.

[0064] Figure 4 A schematic flow chart of a control method for a stack waste heat recovery system according to another embodiment of the present application is shown in FIG. Figure 4 As shown, based on the above embodiment, the above method may further include: S401, collecting and obtaining the air outlet temperature of the cab air conditioner 8.

[0065] The above-mentioned acquisition of the air outlet temperature of the cab air-conditioner 8 may, for example, refer to the acquisition of the temperature value at the air outlet of the cab air-conditioner 8 by means of a temperature sensor disposed at the air outlet of the cab air-conditioner 8. The communication connection between the above-mentioned controller and the above-mentioned air-conditioning system may, for example, include a communication connection between the controller and the temperature sensor. After the temperature sensor acquires the temperature value at the air outlet of the cab air-conditioner 8, for example, the acquired temperature value at the air outlet of the cab air-conditioner 8 may be sent to the above-mentioned controller through the above-mentioned communication connection. The temperature value at the air outlet of the cab air-conditioner 8 is also the air outlet temperature of the above-mentioned cab air-conditioner 8.

[0066] S402: When the air outlet temperature of the cab air conditioner 8 is less than or equal to a preset auxiliary heating start-up temperature threshold, the heater 5 is controlled to start.

[0067] Please continue to refer to the above Figure 1The content disclosed in the embodiment is illustratively that the above-mentioned preset auxiliary heating start-up temperature threshold can be set to t-15°C based on the limit power temperature point t°C of the above-mentioned fuel cell stack 1, etc. At this time, that is, when the air outlet temperature of the above-mentioned cab air conditioner 8 is ≤t-15°C, the above-mentioned heater 5 is controlled to start, but it is not limited to this.

[0068] S403: When the air outlet temperature of the cab air conditioner 8 is greater than a preset auxiliary heating shut-off temperature threshold, the heater 5 is controlled to shut down.

[0069] Exemplarily, the preset auxiliary heating shutdown temperature threshold can be set to t-10°C based on the limit power temperature point t°C of the fuel cell stack 1. At this time, that is, during the startup of the heater 5, when the air outlet temperature of the cab air conditioner 8 is greater than t-10°C, the heater 5 is controlled to be shut down, but not limited to this.

[0070] In the control method of the battery stack waste heat recovery system provided in the present embodiment, the temperature of the air outlet of the cab air conditioner 8 is collected and obtained. When the air outlet temperature of the cab air conditioner 8 is less than or equal to the preset auxiliary heating start-up temperature threshold, the heater 5 is controlled to start. When the air outlet temperature of the cab air conditioner 8 is greater than the preset auxiliary heating shut-off temperature threshold, the heater 5 is controlled to shut down. The control method of the battery stack waste heat recovery system provided in the present embodiment heats the coolant of the heat exchanger 2 in the pipe between the second coolant outlet 23 of the heat exchanger and the coolant inlet 71 of the heater core when the air outlet temperature of the cab air conditioner 8 is low, thereby increasing the temperature of the coolant of the heat exchanger 2 entering the heater core 7, thereby enhancing the heating effect of the air conditioning system.

[0071] Optionally, based on the above embodiment, the above method may further include: When the coolant temperature at the coolant outlet 12 of the fuel cell stack is less than or equal to a preset stop temperature threshold, the water valve 3 is controlled to be closed.

[0072] Exemplarily, the preset stop temperature threshold can be set to t-10°C, but is not limited to this. When the coolant temperature at the coolant outlet 12 of the fuel cell stack is less than or equal to the preset stop temperature threshold, it can be explained that the coolant temperature at the coolant outlet 12 of the fuel cell stack carries low waste heat from the stack, that is, the heat carried, which is insufficient to provide heat for the air-conditioning system to achieve heating of the air-conditioning system. Therefore, there is no need to recover waste heat at this time, and the water valve 3 can be controlled to close.

[0073] Further, based on the above embodiment, after the above water valve 3 is controlled to be closed, the method may further include: The air-conditioning compressor 9 is controlled to start, and the delivery flow rate of the water pump 4 is controlled to be adjusted to a preset delivery flow rate.

[0074] For example, since the coolant temperature at the coolant outlet 12 of the fuel cell stack carries the waste heat of the stack, that is, the heat carried, which is low and insufficient to heat the air conditioning system to achieve heating of the air conditioning system, the air conditioning compressor 9 can be started at this time, and the air conditioning compressor 9 works normally, consuming electrical energy and converting it into thermal energy to achieve heating of the air conditioning system. The preset sending flow rate can be, for example, the maximum sending flow rate of the water pump 4, but is not limited thereto.

[0075] In addition, based on the above embodiments, please refer to Figure 1 The stack waste heat recovery system may further include an expansion water tank 6. The expansion water tank 6 is disposed between the coolant outlet of the heat exchanger 2 and the coolant inlet 71 of the heater core.

[0076] The expansion water tank 6 may be, for example, a water tank made of materials including but not limited to plastic, metal, etc. The expansion water tank 6 may be used, for example, to prevent the pressure in the heat exchanger 2, the heater core 7, and the connecting pipes between the heat exchanger 2 and the heater core 7 from increasing after the coolant in the heat exchanger 2 is heated and expanded, resulting in damage and leakage. When the coolant in the heat exchanger 2 is heated and expanded, it may flow into the expansion water tank 6 to maintain the pressure in the heat exchanger 2, the heater core 7, and the connecting pipes between the heat exchanger 2 and the heater core 7 stable. When the coolant in the heat exchanger 2 is cooled and contracted, it may gradually flow back out of the expansion water tank 6. Of course, the above contents are only possible examples. The specific structure, size, connection method, etc. of the expansion water tank 6 may be selected and determined according to actual conditions and are not limited to the above contents.

[0077] Figure 5 The present invention provides a schematic diagram of the structure of a control device for a waste heat recovery system of a fuel cell stack provided in an embodiment of the present invention. The control device for the waste heat recovery system of a fuel cell stack can execute the control method for the waste heat recovery system of a fuel cell stack. The device can be integrated into the controller, for example, Figure 5 As shown, the device may include: The receiving module 510 is used to receive a heating request sent by the air-conditioning system.

[0078] The acquisition module 520 is used to acquire the coolant temperature at the coolant outlet 12 of the fuel cell stack according to the heating request.

[0079] The control module 530 is used to control the water valve 3 to open and the water pump 4 to start running when the coolant temperature at the coolant outlet 12 of the above-mentioned fuel cell stack is greater than or equal to the above-mentioned preset starting temperature threshold, and to control the delivery flow of the above-mentioned water pump 4 according to a preset algorithm.

[0080] In the control method of the stack waste heat recovery system provided in this embodiment, a heating request sent by the air conditioning system is received. According to the heating request, the coolant temperature at the coolant outlet 12 of the fuel cell stack is collected and obtained. When the coolant temperature at the coolant outlet 12 of the fuel cell stack is greater than or equal to the preset start temperature threshold, the water valve 3 is controlled to open and the water pump 4 is controlled to start running, and the sending flow of the water pump 4 is controlled according to the preset algorithm. The control method of the stack waste heat recovery system provided in this embodiment opens the water valve 3 and the water pump 4 in the stack waste heat recovery system when the coolant temperature at the coolant outlet 12 of the fuel cell stack is sufficient to start the heat exchange between the cooling circuit of the fuel cell stack 1 and the circuit where the air conditioning system is located, and then the waste heat of the stack is used for heating the air conditioning system, and the sending flow of the water pump 4 is controlled by the preset algorithm to control the heat exchange speed at the air conditioning system, so as to avoid local overcooling or overheating of the cooling circuit of the fuel cell stack 1, thereby improving the stability of the cooling circuit of the fuel cell stack 1 during the fuel cell waste heat recovery process.

[0081] Optionally, the heating request of the air-conditioning system includes: setting a target temperature.

[0082] The control module 530 is specifically used to determine a plurality of control parameters according to the set target temperature, and the control parameters are used to indicate the flow rate change per cycle. The sending flow rate adjustment value is calculated according to the plurality of control parameters and a preset calculation formula. The sending flow rate of the water pump 4 is controlled according to the sending flow rate adjustment value.

[0083] Optionally, the control parameters include: A, B, C, and A is calculated by the following formula: , The above B is calculated by the following formula: , The above C is calculated by the following formula: , in, is the preset intermediate value, To adjust the cycle, and To adjust the parameters.

[0084] Optionally, the air conditioning system may include: a warm air core 7 , a cab air conditioner 8 , and an air conditioning compressor 9 .

[0085] The above-mentioned heater core 7 is connected to the above-mentioned heat exchanger 2 through the above-mentioned pipeline, wherein the second coolant outlet 23 of the above-mentioned heat exchanger is connected to the coolant inlet 71 of the above-mentioned heater core, the coolant outlet 72 of the above-mentioned heater core is connected to the second coolant inlet 24 of the above-mentioned heat exchanger, and the above-mentioned water pump 4 is arranged between the second coolant outlet 23 of the above-mentioned heat exchanger and the coolant inlet 71 of the above-mentioned heater core.

[0086] Optionally, the above-mentioned fuel cell waste heat recovery system also includes: a heater 5, which is arranged between the second coolant outlet of the above-mentioned heat exchanger and the coolant inlet of the above-mentioned heater core, and is communicatively connected with the above-mentioned controller.

[0087] The above-mentioned acquisition module 520 can also be used to acquire the air outlet temperature of the cab air conditioner 8.

[0088] The control module 530 can also be used to control the heater 5 to start when the air outlet temperature of the cab air conditioner 8 is less than or equal to the preset auxiliary heating start temperature threshold. When the air outlet temperature of the cab air conditioner 8 is greater than the preset auxiliary heating shut-off temperature threshold, the heater 5 is controlled to shut down.

[0089] Optionally, the control module 530 may also be used to control the water valve 3 to close when the coolant temperature at the coolant outlet 12 of the fuel cell stack is less than or equal to a preset stop temperature threshold.

[0090] Optionally, the control module 530 may also be used to control the air-conditioning compressor 9 to turn on after controlling the water valve 3 to close, and to control the delivery flow of the water pump 4 to adjust to a preset delivery flow.

[0091] Optionally, the stack waste heat recovery system may further include: an expansion water tank 6. The expansion water tank 6 is disposed between the coolant outlet of the heat exchanger 2 and the coolant inlet 71 of the heater core.

[0092] The above-mentioned device is used to execute the method provided by the aforementioned embodiment, and its implementation principle and technical effect are similar, which will not be repeated here.

[0093] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, the electronic device may be, for example, the controller described above, such as Figure 6 As shown, the device 600 includes: Processor 610 , storage medium 620 and bus 630 . Processor 610 and storage medium 620 are communicatively connected via bus 630 .

[0094] Among them, the storage medium 620 stores machine-readable instructions executable by the processor 610. When the electronic device is running, the processor 610 executes the above-mentioned machine-readable instructions to execute the above-mentioned fuel cell waste heat recovery system control method.

[0095] It should be understood that Figure 6 The structure shown is only a schematic diagram of the structure of the electronic device. The electronic device may also include Figure 6 More or fewer components as shown, or with Figure 6 Different configurations shown. Figure 6 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0096] In addition, an embodiment of the present application also provides a car, which may include a fuel cell waste heat recovery system as described in the aforementioned embodiment, or an electronic device as described in the aforementioned embodiment. Optionally, the car may be a new energy vehicle.

[0097] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program can be executed by a processor, the method for controlling the battery stack waste heat recovery system described in the above method embodiment is implemented.

[0098] The computer-readable storage medium may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read-only memory), an EPROM, a hard disk or a ROM. Optionally, the computer-readable storage medium includes a non-transitory computer-readable storage medium. The computer-readable storage medium has a storage space for program codes for executing any method steps in the above method. These program codes may be read from or written to one or more computer program products. The program code may be compressed, for example, in an appropriate form.

[0099] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and a part of the module, program segment or code contains one or more executable instructions for implementing 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 consecutive boxes 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 and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0100] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0101] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0102] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A control method for a stack waste heat recovery system, characterized in that: The method is applied to a controller in a stack waste heat recovery system, and the stack waste heat recovery system includes: a controller, a fuel cell stack, an air conditioning system, a water valve, a water pump, and a heat exchanger; the controller is communicatively connected with the air conditioning system, the fuel cell stack, the water valve, and the water pump; the fuel cell stack is connected with the heat exchanger through a pipeline, wherein the coolant outlet of the fuel cell stack is connected with the first coolant inlet of the heat exchanger, the first coolant outlet of the heat exchanger is connected with the coolant inlet of the fuel cell stack, and the water valve is arranged between the coolant outlet of the fuel cell stack and the first coolant inlet of the heat exchanger; the method includes: receiving a heating request sent by the air conditioning system; According to the heating request, collecting and obtaining the coolant temperature at the coolant outlet of the fuel cell stack; When the coolant temperature at the coolant outlet of the fuel cell stack is greater than or equal to a preset start-up temperature threshold, the water valve is controlled to open and the water pump is controlled to start running, and the delivery flow of the water pump is controlled according to a preset algorithm.

2. The method according to claim 1, characterized in that The heating request of the air conditioning system includes: setting a target temperature; The step of controlling the sending flow of the water pump according to a preset algorithm comprises: Determining a plurality of control parameters according to the set target temperature, wherein the control parameters are used to indicate flow rate changes per cycle; Calculate and obtain a sending flow adjustment value according to the plurality of control parameters and a preset calculation formula; The sending flow rate of the water pump is controlled according to the sending flow rate adjustment value.

3. The method according to claim 2, characterized in that The control parameters include: A, B, C, and A is calculated by the following formula: ； The B is calculated by the following formula: ； The C is calculated by the following formula: ； in, is the preset intermediate value, To adjust the cycle, and To adjust the parameters.

4. The method according to claim 1, characterized in that The air conditioning system includes: a heater core, a cab air conditioner, and an air conditioning compressor; The heater core is connected to the heat exchanger through the pipeline, wherein the second coolant outlet of the heat exchanger is connected to the coolant inlet of the heater core, the coolant outlet of the heater core is connected to the second coolant inlet of the heat exchanger, and the water pump is arranged between the second coolant outlet of the heat exchanger and the coolant inlet of the heater core.

5. The method according to claim 4, characterized in that The stack waste heat recovery system further includes: a heater, which is disposed between the second coolant outlet of the heat exchanger and the coolant inlet of the heater core and is communicatively connected to the controller; the method further includes: Collecting and obtaining the air outlet temperature of the air conditioner in the cab; When the air outlet temperature of the cab air conditioner is less than or equal to the preset auxiliary heating start-up temperature threshold, controlling the heater to start; When the air outlet temperature of the cab air conditioner is greater than a preset auxiliary heating shutdown temperature threshold, the heater is controlled to be turned off.

6. The method according to claim 5, characterized in that The method further comprises: When the coolant temperature at the coolant outlet of the fuel cell stack is less than or equal to a preset stop temperature threshold, the water valve is controlled to close.

7. The method according to claim 6, characterized in that After controlling the water valve to close, the method further comprises: The air-conditioning compressor is controlled to start, and the delivery flow rate of the water pump is controlled to be adjusted to a preset delivery flow rate.

8. The method according to claim 4, characterized in that The stack waste heat recovery system also includes: an expansion water tank; The expansion water tank is arranged between the coolant outlet of the heat exchanger and the coolant inlet of the heater core.

9. An electronic device, characterized in that: include: A processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, the processor and the storage medium communicate via the bus, and the processor executes the machine-readable instructions to perform the method as claimed in any one of claims 1 to 8.

10. An automobile, characterized in that: The car comprises the electronic device as claimed in claim 9.

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