Control method and device of thermal management loop, storage medium and vehicle

Abstract

The invention provides a control method and device of a thermal management loop, a storage medium and a vehicle, the thermal management loop comprises a warm air core loop, an electric pile heat dissipation loop of a fuel cell and a three-way valve, and the three-way valve has a first state of conducting the warm air core loop and the electric pile heat dissipation loop. In the second state, the warm air core body loop and the electric pile heat dissipation loop are disconnected; the method comprises the steps that under the condition that the heating function of the air conditioner is in an on state, the first temperature of a galvanic pile water inlet in a galvanic pile heat dissipation loop, the second temperature of a warm air core water outlet in a warm air core loop and the third temperature corresponding to the in-vehicle environment are detected; and controlling the state of the three-way valve according to the first temperature, the second temperature and the third temperature. The state of the three-way valve matched with the current working condition is determined according to the first temperature, the second temperature and the third temperature, the heating rate of the electric pile and the interior of the vehicle can be increased, and the driving experience of a user can be improved while the heat utilization rate of the whole vehicle is increased.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a control method, device, storage medium and vehicle for a thermal management loop. Background Art

[0002] Current new energy vehicles can be divided into hybrid vehicles, plug-in electric vehicles, and fuel cell electric vehicles according to their internal power systems. Among them, for fuel cell electric vehicles, the suitable operating temperature of the fuel cell stack is generally above 60 degrees Celsius, and the suitable ambient temperature of the cab in winter is generally between 18 degrees Celsius and 25 degrees Celsius. At present, the winter heating of the cab generally uses a positive temperature coefficient (PTC) heater and the waste heat of the stack to provide heat, that is, the warm air core circuit equipped with a PTC heater is connected to the heat dissipation circuit of the stack. Since the suitable operating temperature of the stack and the suitable ambient temperature of the cab are different, there is an unreasonable heat distribution. Summary of the invention

[0003] The embodiments of the present application provide a control method, device, storage medium and vehicle for a thermal management circuit to solve the problem of unreasonable heat distribution when the existing warm air circuit and the heat dissipation circuit of the battery stack are connected.

[0004] In a first aspect, an embodiment of the present application provides a control method for a thermal management circuit, wherein the thermal management circuit includes a warm air core circuit, a fuel cell stack heat dissipation circuit, and a three-way valve, wherein the three-way valve is connected to the warm air core circuit and the stack heat dissipation circuit, respectively, and the three-way valve includes a first state of connecting the warm air core circuit and the stack heat dissipation circuit, and a second state of disconnecting the warm air core circuit and the stack heat dissipation circuit; the method includes:

[0005] When the heating function of the air conditioner is turned on, detecting a first temperature at a water inlet of the battery stack in the battery stack heat dissipation circuit, a second temperature at a water outlet of a heater core in the heater core circuit, and a third temperature corresponding to the vehicle interior environment;

[0006] The state of the three-way valve is controlled according to the first temperature, the second temperature and the third temperature.

[0007] In a second aspect, an embodiment of the present application further provides a control device for a thermal management circuit, wherein the thermal management circuit includes a warm air core circuit, a fuel cell stack heat dissipation circuit, and a three-way valve, wherein the three-way valve is connected to the warm air core circuit and the stack heat dissipation circuit, respectively, and the three-way valve includes a first state of connecting the warm air core circuit and the stack heat dissipation circuit, and a second state of disconnecting the warm air core circuit and the stack heat dissipation circuit; the device includes:

[0008] The inspection module is used to detect a first temperature at a water inlet of the battery stack in the battery stack heat dissipation circuit, a second temperature at a water outlet of a heater core in the heater core circuit, and a third temperature corresponding to an in-vehicle environment when the heating function of the air conditioner is turned on;

[0009] The first control module is used to control the state of the three-way valve according to the first temperature, the second temperature and the third temperature.

[0010] In a third aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the control method of the thermal management loop described above is implemented.

[0011] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the above-mentioned control method of the thermal management loop when executed by the processor.

[0012] The embodiments of the present application include at least the following technical effects:

[0013] The technical solution of the embodiment of the present application is to detect, when the heating function of the air conditioner is on, a first temperature at the water inlet of the battery stack in the heat dissipation circuit of the battery stack, a second temperature at the water outlet of the warm air core in the warm air core circuit, and a third temperature corresponding to the vehicle interior environment, and control the state of the three-way valve according to the first temperature, the second temperature and the third temperature. Compared with the prior art in which the warm air core circuit and the battery stack heat dissipation circuit are directly connected when the heating function of the air conditioner is turned on, there is a problem of unreasonable heat distribution. In the embodiment of the present application, a three-way valve is provided to control whether the warm air core circuit and the battery stack heat dissipation circuit are connected, and the water inlet temperature of the battery stack, the water outlet temperature of the warm air core and the vehicle interior environment temperature are detected and analyzed in real time to determine the temperature corresponding to the current The three-way valve state for working condition matching and optimal heat distribution, for example, when the battery stack has not reached a suitable operating temperature and the temperature corresponding to the battery stack heat dissipation circuit is lower than the temperature corresponding to the heater core circuit, the two circuits can be separated by controlling the three-way valve to avoid the problem of the heater core absorbing the heat of the battery stack and causing a decrease in the heating rate of the battery stack; and when the temperature in the vehicle has not reached a suitable temperature, the battery stack has reached a suitable operating temperature and the temperature corresponding to the battery stack heat dissipation circuit is higher than the temperature corresponding to the heater core, the two circuits can be connected by controlling the three-way valve, so that the heat from the battery stack can be used to increase the temperature in the vehicle and increase the heating rate in the vehicle. In summary, the embodiments of the present application can increase the heating rates of the battery stack and the vehicle, and can also improve the driving experience of the user while improving the heat utilization rate of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 are briefly introduced below.

[0015] Figure 1 is a flow chart of a control method for a thermal management circuit provided in an embodiment of the present application;

[0016] Figure 2 It is one of the structural schematic diagrams corresponding to the thermal management circuit provided in the embodiment of the present application;

[0017] Figure 3 This is the second structural schematic diagram corresponding to the thermal management circuit provided in the embodiment of the present application;

[0018] Figure 4 This is the third structural schematic diagram corresponding to the thermal management circuit provided in the embodiment of the present application;

[0019] Figure 5 is a schematic diagram of the structure of a control device for a thermal management circuit provided in an embodiment of the present application;

[0020] Figure 6 A block diagram of a vehicle provided in accordance with an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0023] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0024] like Figure 1 As shown, an embodiment of the present application provides a control method for a thermal management circuit, the method comprising:

[0025] Step 101, when the heating function of the air conditioner is turned on, a first temperature at the water inlet of the battery stack in the battery stack heat dissipation circuit, a second temperature at the water outlet of the heater core in the heater core circuit, and a third temperature corresponding to the vehicle interior environment are detected.

[0026] like Figure 2 As shown, the thermal management circuit in the embodiment of the present application includes a warm air core circuit 210, a fuel cell stack heat dissipation circuit 220 and a three-way valve 230, wherein the three-way valve 230 is connected to the warm air core circuit 210 and the stack heat dissipation circuit 220 respectively, and the three-way valve 230 includes a first state that conducts the warm air core circuit 210 and the stack heat dissipation circuit 220, such as Figure 3 As shown, and the second state of disconnecting the warm air core circuit 210 and the stack heat dissipation circuit 220, as shown Figure 4 shown.

[0027] The control method of the thermal management circuit provided in the embodiment of the present application is applied to a thermal management controller, which can be a vehicle controller. It should be noted that when the vehicle is started, the three-way valve is in the second state by default, that is, the warm air core circuit and the stack heat dissipation circuit are disconnected and independent of each other, and the thermal management controller can detect the on and off state of the heating function of the air conditioner. When it is detected that the heating function of the air conditioner is in the on state, the thermal management controller detects the first temperature at the water inlet of the stack in the stack heat dissipation circuit, the second temperature at the water outlet of the warm air core in the warm air core circuit, and the third temperature corresponding to the vehicle interior environment.

[0028] Step 102: Control the state of the three-way valve according to the first temperature, the second temperature and the third temperature.

[0029] The thermal management controller can determine a target state of the three-way valve that matches the current operating conditions by detecting the first temperature, the second temperature, and the third temperature. The target state is the first state or the second state, so that the state of the three-way valve can be controlled based on the target state.

[0030] In the embodiment of the present application, when the heating function of the air conditioner is turned on, the first temperature at the water inlet of the battery stack in the battery stack heat dissipation circuit, the second temperature at the water outlet of the warm air core in the warm air core circuit, and the third temperature corresponding to the vehicle interior environment are detected, and the state of the three-way valve matching the current working condition is determined according to the first temperature, the second temperature and the third temperature, and the state of the three-way valve is controlled. Compared with keeping the warm air core circuit and the battery stack heat dissipation circuit connected all the time, the heating rate of the battery stack and the vehicle interior can be increased, and the user's driving experience can be improved while improving the heat utilization rate of the entire vehicle.

[0031] In an optional embodiment of the present application, controlling the state of the three-way valve according to the first temperature, the second temperature and the third temperature includes:

[0032] When the first temperature is lower than a first preset temperature threshold and the third temperature is lower than a second preset temperature threshold, controlling the three-way valve to be in the second state;

[0033] When the first temperature is lower than the first preset temperature threshold, the third temperature is higher than or equal to the second preset temperature threshold, and the first temperature is higher than or equal to the second temperature, controlling the three-way valve to be in the second state;

[0034] When the first temperature is lower than the first preset temperature threshold, the third temperature is higher than or equal to the second preset temperature threshold, and the first temperature is lower than the second temperature, controlling the three-way valve to be in the first state;

[0035] When the first temperature is greater than or equal to the first preset temperature threshold, the third temperature is less than the second preset temperature threshold, and the first temperature is greater than the second temperature, controlling the three-way valve to be in the first state;

[0036] When the first temperature is greater than or equal to the first preset temperature threshold, the third temperature is less than the second preset temperature threshold, and the first temperature is less than or equal to the second temperature, controlling the three-way valve to be in the second state;

[0037] When the first temperature is greater than or equal to the first preset temperature threshold and the third temperature is greater than or equal to the second preset temperature threshold, the three-way valve is controlled to be in the first state.

[0038] Specifically, when the state of the three-way valve is controlled according to the first temperature, the second temperature and the third temperature, the first temperature can be compared with the first preset temperature threshold, the third temperature can be compared with the second preset temperature threshold, and the first temperature can be compared with the second temperature. The first preset temperature threshold here is the lower limit of the suitable operating temperature of the stack. If the operating temperature of the stack is lower than the first preset temperature threshold, the stack reaction efficiency will be reduced or even the stack will be damaged. Specifically, the lower limit of the suitable operating temperature of the fuel cell stack can be calibrated through experiments as the first preset temperature threshold. For example, the first preset temperature threshold can be determined as 60 degrees Celsius. The second preset temperature threshold here is the lower limit of the suitable temperature of the in-vehicle environment. For example, when the suitable temperature of the in-vehicle environment is 18 degrees Celsius to 25 degrees Celsius, the second preset temperature threshold can be set to 18 degrees Celsius.

[0039] Wherein, based on the relationship between the first temperature and the first preset temperature threshold, the following two situations are included: the first temperature is less than the first preset temperature threshold, and the first temperature is greater than or equal to the first preset temperature threshold.

[0040] In the first case, the first temperature is less than the first preset temperature threshold, that is, the current battery stack has not reached the appropriate operating temperature. At this time, the battery stack needs to heat up by its own heat generation. When the heating function of the air conditioner is turned on, the heater in the warm air core circuit is turned on, and the warm air core is heated and heated by the heater, thereby increasing the ambient temperature in the car. When the heater is turned on, the ambient temperature in the car gradually increases. During this process, the detected third temperature and the second preset temperature threshold can be compared to determine whether the ambient temperature in the car has reached a suitable temperature. Among them, when the third temperature is less than the second preset temperature threshold, it indicates that the ambient temperature in the car has not reached a suitable temperature. At this time, the warm air core circuit and the battery stack heat dissipation circuit need to be disconnected, and the three-way valve is controlled to be in the second state, so that the battery stack is heated by its own heat generation, and the warm air core is heated and heated by the heater. It can avoid the warm air core absorbing the heat of the battery stack and slowing down the heating rate of the battery stack, or the battery stack absorbs the heat of the warm air core and slows down the heating rate in the car. As the heater working time increases, the vehicle interior temperature gradually increases. When the third temperature is greater than or equal to the second preset temperature threshold, it indicates that the vehicle interior temperature has reached a suitable temperature. At this time, it is necessary to compare the first temperature and the second temperature. When the first temperature is greater than or equal to the second temperature, it indicates that the temperature corresponding to the heat dissipation circuit of the battery stack is higher than the temperature corresponding to the warm air core circuit. At this time, the warm air core circuit and the battery stack heat dissipation circuit need to be disconnected, and the three-way valve is controlled to maintain the second state, so that the battery stack is heated by its own heat generation, and the warm air core is heated by the heater to avoid the warm air core absorbing the heat of the battery stack and slowing down the heating rate of the battery stack. When the first temperature is less than the second temperature, it indicates that the temperature corresponding to the warm air core circuit is higher than the temperature corresponding to the heat dissipation circuit of the battery stack. At this time, the warm air core circuit and the heat dissipation circuit of the battery stack can be connected, that is, the three-way valve is controlled to switch to the first state, so that the battery stack can be heated by its own heat generation and the heater, thereby increasing the heating rate of the battery stack and making it reach a suitable working temperature as soon as possible.

[0041] In the second case, the first temperature is greater than or equal to the first preset temperature threshold, that is, the current battery stack has reached a suitable operating temperature. In order to avoid the battery stack temperature being too high, the battery stack needs to be cooled by a radiator. At this time, if the third temperature is less than the second preset temperature threshold, it indicates that the ambient temperature in the vehicle has not reached the suitable temperature. Furthermore, if the first temperature is greater than or equal to the second temperature, it indicates that the temperature corresponding to the battery stack heat dissipation circuit is higher than the temperature corresponding to the warm air core circuit. The warm air core circuit and the battery stack heat dissipation circuit can be connected, that is, the three-way valve is controlled to switch to the first state, so that the warm air core can be heated by the heater and the waste heat generated by the battery stack, thereby increasing the heating rate of the warm air core, so that the ambient temperature in the vehicle, that is, the third temperature, reaches the suitable temperature, that is, the second preset temperature threshold as soon as possible. If the first temperature is lower than the second temperature, it indicates that the temperature corresponding to the heat dissipation circuit of the battery stack is lower than the temperature corresponding to the heater core circuit. At this time, it is necessary to disconnect the heater core circuit and the heat dissipation circuit of the battery stack, that is, control the three-way valve to be in the second state, so as to prevent the heat dissipation circuit of the battery stack from absorbing the heat in the heater core circuit, slow down the heating rate in the vehicle, and heat the heater core only through the heater, so that the temperature in the vehicle reaches the appropriate temperature as soon as possible. When the third temperature is greater than the second preset temperature threshold, that is, when the vehicle reaches the appropriate temperature, the heater core circuit and the heat dissipation circuit of the battery stack can be connected, that is, the three-way valve can be controlled to switch to the first state, so that the heater core can be heated by the waste heat generated by the battery stack, thereby improving the heat utilization rate.

[0042] The above-mentioned implementation scheme of the present application and the technical scheme of the embodiment of the present application detect the first temperature at the water inlet of the battery stack in the heat dissipation circuit of the battery stack, the second temperature at the water outlet of the warm air core in the warm air core circuit, and the third temperature corresponding to the vehicle interior environment when the heating function of the air conditioner is turned on, and control the state of the three-way valve according to the first temperature, the second temperature and the third temperature. Compared with the prior art in which the warm air core circuit and the battery stack heat dissipation circuit are directly connected when the heating function of the air conditioner is turned on, there is a problem of unreasonable heat distribution. In the embodiment of the present application, a three-way valve is set to control whether the warm air core circuit and the battery stack heat dissipation circuit are connected, and the water inlet temperature of the battery stack, the water outlet temperature of the warm air core and the vehicle interior environment temperature are detected and analyzed in real time to determine The three-way valve state that matches the current working condition and has the best heat distribution can be output. For example, when the battery stack has not reached a suitable operating temperature and the temperature corresponding to the battery stack heat dissipation circuit is lower than the temperature corresponding to the heater core circuit, the two circuits can be separated by controlling the three-way valve to avoid the problem that the heater core absorbs the heat of the battery stack and causes a decrease in the heating rate of the battery stack. When the temperature inside the vehicle has not reached a suitable temperature, the battery stack has reached a suitable operating temperature, and the temperature corresponding to the battery stack heat dissipation circuit is higher than the temperature corresponding to the heater core, the two circuits can be connected by controlling the three-way valve, so that the heat from the battery stack can be used to increase the temperature inside the vehicle, thereby increasing the heating rate inside the vehicle. In summary, the embodiments of the present application can increase the heating rates of the battery stack and the vehicle, and can also improve the driving experience of the user while improving the heat utilization rate of the entire vehicle.

[0043] In an optional embodiment of the present application, the method further includes:

[0044] When the first temperature is greater than or equal to the first preset temperature threshold and the third temperature is greater than or equal to the second preset temperature threshold, the heater in the warm air core circuit is controlled to be turned off.

[0045] Specifically, when the first temperature is greater than or equal to the first preset temperature threshold and the third temperature is greater than or equal to the second preset temperature threshold, that is, the battery stack has reached a suitable operating temperature and the interior environment has also reached a suitable temperature, the three-way valve is in the first state, the battery stack heat dissipation circuit and the heater core circuit are connected, and the heater core can continue to be heated by the waste heat of the battery stack. At this time, the heater in the heater core circuit can be turned off to stop working and reduce the energy consumption of the entire vehicle.

[0046] The above implementation scheme of the present application, when the battery stack reaches a suitable operating temperature and the vehicle interior environment reaches a suitable temperature, by turning off the heater and using the waste heat generated by the battery stack to continue heating the heater core, the energy consumption of the entire vehicle can be effectively reduced.

[0047] In an optional embodiment of the present application, the method further includes:

[0048] When the heating function of the air conditioner is in an off state, the three-way valve is controlled to be in the second state.

[0049] Specifically, when the thermal management controller detects that the heating function of the air conditioner is in the off state, it controls the three-way valve to be in the second state so that the heater core circuit and the stack heat dissipation circuit are disconnected to prevent the heat generated by the stack from heating the heater core.

[0050] In the above implementation scheme of the present application, by controlling the three-way valve to be in the second state when the air-conditioning heating function is turned off, the warm air core circuit and the stack heat dissipation circuit can be disconnected in time to prevent the heat generated by the stack from being transferred to the warm air core circuit.

[0051] In an optional embodiment of the present application, if Figure 2 As shown, the three-way valve 230 includes a first interface 231, a second interface 232 and a third interface 233;

[0052] The first interface 231 is connected to the stack heat dissipation circuit 220;

[0053] The second interface 232 and the third interface 213 are connected in series to the warm air core loop 210;

[0054] When the three-way valve 230 is in the first state, only the first port 231 and the second port 232 are connected;

[0055] When the three-way valve 230 is in the second state, only the second port 232 and the third port 233 are connected.

[0056] Specifically, Figure 3 As shown, only the first port 231 and the second port 232 of the three-way valve 230 are connected, and the stack heat dissipation circuit and the warm air core circuit are connected. Figure 4 As shown, only the second interface 232 and the third interface 233 of the three-way valve 230 are connected, and at this time, the stack heat dissipation circuit and the heater core circuit are disconnected.

[0057] Wherein, in step 102, controlling the state of the three-way valve according to the first temperature, the second temperature and the third temperature includes:

[0058] The connection states of the first port, the second port, and the third port of the three-way valve are controlled according to the first temperature, the second temperature, and the third temperature.

[0059] The above-mentioned implementation scheme of the present application, by adding a three-way valve in the thermal management circuit, facilitates the subsequent control of the state of the three-way valve based on the current operating conditions, thereby achieving connection or disconnection between the battery stack heat dissipation circuit and the heater core circuit, thereby improving the heat utilization efficiency in the thermal management circuit.

[0060] In an optional embodiment of the present application, if Figure 2 As shown, the heater core circuit 210 includes a heater core, a heater water pump 211 and a heater, which may be a PTC heater;

[0061] A second temperature sensor is arranged at the water outlet of the heater core;

[0062] Wherein, in step 101, detecting the second temperature of the water outlet of the warm air core in the warm air core loop includes:

[0063] The second temperature is detected by the second temperature sensor.

[0064] In the above embodiment of the present application, a second temperature sensor is arranged at the outlet of the heater core, so that the second temperature responded by the heater core circuit can be detected, so as to facilitate the subsequent control of the state of the three-way valve based on the second temperature.

[0065] In an optional embodiment of the present application, if Figure 2 As shown, the electric propulsion heat dissipation circuit 220 includes a fuel cell stack, a fuel cell water pump 221 and a radiator;

[0066] A first temperature sensor is provided at the water inlet of the electric propulsion;

[0067] Wherein, in step 101, detecting a first temperature at a water inlet of a stack in the stack heat dissipation circuit includes:

[0068] The first temperature is detected by the first temperature sensor.

[0069] The above-mentioned implementation scheme of the present application, by setting a first temperature sensor at the water inlet of the electric propulsion, can detect the first temperature responded by the heat dissipation circuit of the battery stack, so as to facilitate the subsequent control of the state of the three-way valve based on the first temperature.

[0070] The above describes the control method of the thermal management loop provided in the embodiment of the present application. The following describes the control device of the thermal management loop provided in the embodiment of the present application in conjunction with the accompanying drawings.

[0071] like Figure 5 As shown, an embodiment of the present invention further provides a control device for a thermal management circuit, wherein the thermal management circuit includes a warm air core circuit, a heat dissipation circuit of a fuel cell stack and a three-way valve, wherein the three-way valve is connected to the warm air core circuit and the heat dissipation circuit of the fuel cell stack, respectively, and the three-way valve includes a first state of connecting the warm air core circuit and the heat dissipation circuit of the fuel cell stack, and a second state of disconnecting the warm air core circuit and the heat dissipation circuit of the fuel cell stack; the device includes:

[0072] The inspection module 501 is used to detect a first temperature at a water inlet of the battery stack in the battery stack heat dissipation circuit, a second temperature at a water outlet of a heater core in the heater core circuit, and a third temperature corresponding to an in-vehicle environment when the heating function of the air conditioner is turned on;

[0073] The first control module 502 is used to control the state of the three-way valve according to the first temperature, the second temperature and the third temperature.

[0074] Optionally, the first control module includes:

[0075] a first control submodule, configured to control the three-way valve to be in the second state when the first temperature is less than a first preset temperature threshold and the third temperature is less than a second preset temperature threshold;

[0076] a second control submodule, configured to control the three-way valve to be in the second state when the first temperature is lower than the first preset temperature threshold, the third temperature is higher than or equal to the second preset temperature threshold, and the first temperature is higher than or equal to the second temperature;

[0077] a third control submodule, configured to control the three-way valve to be in the first state when the first temperature is lower than the first preset temperature threshold, the third temperature is higher than or equal to the second preset temperature threshold, and the first temperature is lower than the second temperature;

[0078] a fourth control submodule, configured to control the three-way valve to be in the first state when the first temperature is greater than or equal to the first preset temperature threshold, the third temperature is less than the second preset temperature threshold, and the first temperature is greater than the second temperature;

[0079] a fifth control submodule, configured to control the three-way valve to be in the second state when the first temperature is greater than or equal to the first preset temperature threshold, the third temperature is less than the second preset temperature threshold, and the first temperature is less than or equal to the second temperature;

[0080] The sixth control submodule is used to control the three-way valve to be in the first state when the first temperature is greater than or equal to the first preset temperature threshold and the third temperature is greater than or equal to the second preset temperature threshold.

[0081] Optionally, the device further comprises:

[0082] The second control module is used to control the heater in the warm air core circuit to turn off when the first temperature is greater than or equal to the first preset temperature threshold and the third temperature is greater than or equal to the second preset temperature threshold.

[0083] Optionally, the device further comprises:

[0084] The third control module is used to control the three-way valve to be in the second state when the heating function of the air conditioner is in the off state.

[0085] Optionally, the three-way valve includes a first interface, a second interface and a third interface;

[0086] The first interface is connected to the heat dissipation circuit of the battery stack;

[0087] The second interface and the third interface are connected in series to the heater core circuit;

[0088] When the three-way valve is in the first state, only the first interface and the second interface are connected;

[0089] When the three-way valve is in the second state, only the second port and the third port are connected.

[0090] The first control module is further used to control the connection status of the first interface, the second interface and the third interface of the three-way valve according to the first temperature, the second temperature and the third temperature.

[0091] Optionally, the warm air core circuit includes a warm air core, a warm air water pump and a heater;

[0092] A second temperature sensor is arranged at the water outlet of the heater core;

[0093] The detection module is further configured to detect the second temperature through the second temperature sensor.

[0094] Optionally, the electric propulsion heat dissipation circuit includes a fuel cell stack, a fuel cell water pump and a radiator;

[0095] A first temperature sensor is provided at the water inlet of the electric propulsion;

[0096] The detection module is further configured to detect the first temperature through the first temperature sensor.

[0097] The control device of the thermal management circuit provided in the present application detects the first temperature at the water inlet of the battery stack in the battery stack heat dissipation circuit, the second temperature at the warm air core water outlet in the warm air core circuit, and the third temperature corresponding to the vehicle interior environment when the heating function of the air conditioner is in the turned-on state, determines the state of the three-way valve matching the current working condition according to the first temperature, the second temperature and the third temperature, and controls the state of the three-way valve. Compared with keeping the warm air core circuit and the battery stack heat dissipation circuit connected all the time, the heating rate of the battery stack and the vehicle interior can be increased, and the user's driving experience can be improved while improving the heat utilization rate of the entire vehicle.

[0098] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the control method embodiment of the above-mentioned thermal management loop are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0099] An embodiment of the present application also provides a vehicle, comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the various processes of the above-mentioned thermal management loop control method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0100] For example, Figure 6 A schematic diagram of the physical structure of a vehicle is shown.

[0101] like Figure 6 As shown, the vehicle may include: a processor 610, a communication interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communication interface 620 and the memory 630 communicate with each other through the communication bus 640. The processor 610 may call the logic instructions in the memory 630, and the processor 610 is used to perform the following steps: when the heating function of the air conditioner is turned on, the first temperature at the water inlet of the battery stack in the battery stack heat dissipation circuit, the second temperature at the water outlet of the warm air core in the warm air core circuit and the third temperature corresponding to the vehicle interior environment are detected; according to the first temperature, the second temperature and the third temperature, the state of the three-way valve is controlled.

[0102] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. 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, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0103] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0104] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0105] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

[0106] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the embodiments of the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0107] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0108] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0109] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0110] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0111] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical disks.

[0112] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A control method for a thermal management circuit, characterized in that: The thermal management circuit includes a warm air core circuit, a fuel cell stack heat dissipation circuit and a three-way valve, the three-way valve is connected to the warm air core circuit and the stack heat dissipation circuit respectively, and the three-way valve includes a first state of connecting the warm air core circuit and the stack heat dissipation circuit, and a second state of disconnecting the warm air core circuit and the stack heat dissipation circuit; the method includes: When the heating function of the air conditioner is turned on, detecting a first temperature at a water inlet of the battery stack in the battery stack heat dissipation circuit, a second temperature at a water outlet of a heater core in the heater core circuit, and a third temperature corresponding to the vehicle interior environment; The state of the three-way valve is controlled according to the first temperature, the second temperature and the third temperature.

2. The control method of the thermal management circuit according to claim 1, characterized in that: Controlling the state of the three-way valve according to the first temperature, the second temperature, and the third temperature includes: When the first temperature is lower than a first preset temperature threshold and the third temperature is lower than a second preset temperature threshold, controlling the three-way valve to be in the second state; When the first temperature is lower than the first preset temperature threshold, the third temperature is higher than or equal to the second preset temperature threshold, and the first temperature is higher than or equal to the second temperature, controlling the three-way valve to be in the second state; When the first temperature is lower than the first preset temperature threshold, the third temperature is higher than or equal to the second preset temperature threshold, and the first temperature is lower than the second temperature, controlling the three-way valve to be in the first state; When the first temperature is greater than or equal to the first preset temperature threshold, the third temperature is less than the second preset temperature threshold, and the first temperature is greater than the second temperature, controlling the three-way valve to be in the first state; When the first temperature is greater than or equal to the first preset temperature threshold, the third temperature is less than the second preset temperature threshold, and the first temperature is less than or equal to the second temperature, controlling the three-way valve to be in the second state; When the first temperature is greater than or equal to the first preset temperature threshold and the third temperature is greater than or equal to the second preset temperature threshold, the three-way valve is controlled to be in the first state.

3. The control method of the thermal management circuit according to claim 2, characterized in that: The method further comprises: When the first temperature is greater than or equal to the first preset temperature threshold and the third temperature is greater than or equal to the second preset temperature threshold, the heater in the warm air core circuit is controlled to be turned off.

4. The control method of the thermal management circuit according to claim 1, characterized in that: The method further comprises: When the heating function of the air conditioner is in an off state, the three-way valve is controlled to be in the second state.

5. The control method of the thermal management circuit according to claim 1, characterized in that: The three-way valve comprises a first interface, a second interface and a third interface; The first interface is connected to the heat dissipation circuit of the battery stack; The second interface and the third interface are connected in series to the heater core circuit; When the three-way valve is in the first state, only the first interface and the second interface are connected; When the three-way valve is in the second state, only the second interface and the third interface are connected; Controlling the state of the three-way valve according to the first temperature, the second temperature, and the third temperature includes: The connection states of the first port, the second port, and the third port of the three-way valve are controlled according to the first temperature, the second temperature, and the third temperature.

6. The control method of the thermal management circuit according to claim 1, characterized in that: The heater core circuit includes a heater core, a heater water pump and a heater; A second temperature sensor is arranged at the water outlet of the heater core; The method of detecting the second temperature of the water outlet of the warm air core in the warm air core loop includes: The second temperature is detected by the second temperature sensor.

7. The control method of the thermal management circuit according to claim 1, characterized in that: The electric propulsion heat dissipation circuit includes a fuel cell stack, a fuel cell water pump and a radiator; A first temperature sensor is provided at the water inlet of the electric propulsion; The first temperature at the water inlet of the stack in the stack heat dissipation circuit is detected, including: The first temperature is detected by the first temperature sensor.

8. A control device for a thermal management circuit, characterized in that: The thermal management circuit includes a warm air core circuit, a fuel cell stack heat dissipation circuit and a three-way valve, wherein the three-way valve is connected to the warm air core circuit and the stack heat dissipation circuit respectively, and the three-way valve includes a first state of connecting the warm air core circuit and the stack heat dissipation circuit, and a second state of disconnecting the warm air core circuit and the stack heat dissipation circuit; the device includes: The inspection module is used to detect a first temperature at a water inlet of the battery stack in the battery stack heat dissipation circuit, a second temperature at a water outlet of a heater core in the heater core circuit, and a third temperature corresponding to an in-vehicle environment when the heating function of the air conditioner is turned on; The first control module is used to control the state of the three-way valve according to the first temperature, the second temperature and the third temperature.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the control method of the thermal management loop according to any one of claims 1 to 7 are implemented.

10. A vehicle, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the control method of the thermal management loop according to any one of claims 1 to 7.

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