A vehicle heating control method, device, electronic device and storage medium

Abstract

The present application provides a vehicle heating control method, device, electronic device and storage medium. The method includes obtaining the current temperature information of the vehicle and the target coolant temperature, determining the heating priority according to the comparison result of the target water temperature in the passenger compartment and the target water temperature on the battery side, controlling the output power of the heater based on the current water temperature in the passenger compartment and the target coolant temperature corresponding to the heating priority to heat the coolant in the passenger compartment, matching the current battery temperature and the current water temperature on the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference, controlling the opening and closing of a three-way valve according to the reserved opening and closing water temperature difference, the target water temperature on the battery side and the current water temperature on the battery side to control the coolant flow rate flowing into the plate heat exchanger, and performing heat exchange on the battery coolant through the plate heat exchanger according to the heated coolant in the passenger compartment; the reserved opening and closing water temperature difference increases the opening and closing temperature reset interval of the three-way valve, increases the heat exchange time between the battery and the passenger compartment, and improves the temperature control accuracy.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and particularly relates to a vehicle heating control method, device, electronic device and storage medium. Background Art

[0002] In winter, both the passenger compartment and the battery pack of an electric vehicle need to be heated. For an electric vehicle not equipped with a heat pump system, generally, a positive temperature coefficient (PTC) heater is controlled to heat the water circuit of the passenger compartment, and then the heat of the passenger compartment is transferred to a plate heat exchanger through a three-way valve, so that the battery circuit exchanges heat at the plate heat exchanger through the coolant circulation, so as to achieve the purpose of heating the battery. However, the target heating temperatures of the passenger compartment and the battery are different. Generally, the larger value is obtained by taking the larger of the first difference between the target water temperature of the passenger compartment and the current water temperature of the passenger compartment, and the second difference between the target water temperature on the battery side and the current water temperature of the passenger compartment, that is, the larger value between the target water temperature of the passenger compartment and the target water temperature on the battery side is used as the input for the proportional integral (PI) regulation control of the PTC heater. The three-way valve is adjusted according to the difference between the actual water temperature on the battery side and the target water temperature on the battery side to avoid overheating while heating the battery.

[0003] However, since the water temperature on the battery side is controlled by the opening of the three-way valve, and the three-way valve plays a role in heat distribution, it can only cut off the heat inflow when a temperature reaches a preset temperature threshold to achieve the temperature control effect, resulting in inaccurate control of the water temperature on the battery side. The water temperature fluctuation on the battery side will trigger the PI regulation of the PTC heater. At this time, if the current water temperature of the passenger compartment has reached the target temperature of the passenger compartment, it will cause the current water temperature of the passenger compartment to exceed the target temperature of the passenger compartment. In severe cases, the current water temperature of the passenger compartment will far exceed the target temperature of the passenger compartment, causing an over-temperature alarm of the PTC heater. At the same time, the poor control of the current water temperature of the passenger compartment will also affect the control fluctuation of the air-conditioning comfort, bringing a bad experience to the passengers, as well as the overshoot of the passenger compartment temperature, resulting in energy waste and range attenuation. Summary of the Invention

[0004] The present application provides a vehicle heating control method, device, electronic device and storage medium to solve the above technical problem that accurate temperature control cannot be achieved when the battery and the passenger compartment are heated simultaneously.

[0005] In an embodiment of the present application, the present application provides a vehicle heating control method, including: obtaining the current temperature information of the vehicle and the coolant target temperature, where the coolant target temperature includes the passenger compartment target water temperature and the battery side target water temperature, and the current temperature information includes the passenger compartment current water temperature, the battery side current water temperature, and the battery current temperature; determining the heating priority according to the comparison result between the passenger compartment target water temperature and the battery side target water temperature, and controlling the output power of the heater based on the passenger compartment current water temperature and the coolant target temperature corresponding to the heating priority to heat the passenger compartment coolant; matching the battery current temperature and the battery side current water temperature with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference; controlling the opening and closing of a three-way valve according to the reserved opening and closing water temperature difference, the battery side target water temperature, and the battery side current water temperature to control the coolant flow rate of the passenger compartment coolant heated by the heater flowing into the plate heat exchanger, and exchanging heat for the battery coolant through the plate heat exchanger according to the heated passenger compartment coolant.

[0006] In an embodiment of the present application, controlling the opening and closing of the three-way valve according to the reserved opening and closing water temperature difference, the battery side target water temperature, and the battery side current water temperature includes: determining a valve opening temperature and a valve closing temperature according to the reserved opening and closing water temperature difference and the battery side target water temperature; if the battery side current water temperature is less than or equal to the valve opening temperature, opening the three-way valve; if the battery side current water temperature is greater than or equal to the valve closing temperature, closing the three-way valve.

[0007] In an embodiment of the present application, determining the valve opening temperature and the valve closing temperature according to the reserved opening and closing water temperature difference and the battery side target water temperature includes: taking the difference between the battery side target water temperature and the reserved opening water temperature difference as the valve opening temperature; taking the sum of the battery side target water temperature and the reserved closing water temperature difference as the valve closing temperature; where the reserved opening and closing water temperature difference includes the reserved opening water temperature difference and the reserved closing water temperature difference.

[0008] In an embodiment of the present application, matching the current battery temperature and the current water temperature on the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference includes: matching the current water temperature on the battery side and the highest battery cell temperature with a first mapping relationship respectively to obtain a reserved closing water temperature difference, where the first mapping relationship is used to characterize the relationship between the reserved closing water temperature difference, the current water temperature on the battery side and the highest battery cell temperature; matching the current water temperature on the battery side and the lowest battery cell temperature with a second mapping relationship respectively to obtain a reserved opening water temperature difference, where the second mapping relationship is used to characterize the relationship between the reserved opening water temperature difference, the current water temperature on the battery side and the lowest battery cell temperature; wherein, the reserved opening and closing water temperature difference includes the reserved opening water temperature difference and the reserved closing water temperature difference, the current battery temperature includes the lowest battery cell temperature and the highest battery cell temperature, and the preset mapping relationship includes the first mapping relationship and the second mapping relationship.

[0009] In an embodiment of the present application, before matching the current battery temperature and the current water temperature on the battery side with a preset mapping relationship respectively, the method further includes: based on different current water temperatures on the battery side and different highest battery cell temperatures, setting corresponding reserved closing water temperature differences according to a preset first temperature difference configuration rule, and establishing a first mapping relationship between the current water temperature on the battery side, the highest battery cell temperature and the reserved closing water temperature difference; based on different current water temperatures on the battery side and different lowest battery cell temperatures, setting corresponding reserved opening water temperature differences according to a preset second temperature difference configuration rule, and establishing a second mapping relationship between the current water temperature on the battery side, the lowest battery cell temperature and the reserved opening water temperature difference; wherein, the preset first temperature difference configuration rule includes a rule set with the goal that the reserved closing water temperature difference decreases as at least one of the current water temperature on the battery side and the highest battery cell temperature increases, the preset second temperature difference configuration rule includes a rule set with the goal that the reserved opening water temperature difference increases as at least one of the current water temperature on the battery side and the lowest battery cell temperature increases, both the reserved opening water temperature difference and the reserved closing water temperature difference are greater than or equal to zero, and the preset mapping relationship includes the first mapping relationship and the second mapping relationship.

[0010] In an embodiment of the present application, determining the heating priority according to the comparison result of the target water temperature in the passenger compartment and the target water temperature on the battery side includes: if the target water temperature in the passenger compartment is greater than or equal to the target water temperature on the battery side, determining the heating priority as passenger compartment priority; if the target water temperature in the passenger compartment is less than the target water temperature on the battery side, determining the heating priority as battery priority.

[0011] In an embodiment of the present application, after determining the heating priority according to the comparison result of the target water temperature of the passenger compartment and the target water temperature of the battery side, the method further includes: if the heating priority is battery priority, controlling the temperature of the air conditioner according to the target water temperature of the passenger compartment and the current water temperature of the passenger compartment to cool the passenger compartment.

[0012] In an embodiment of the present application, the present application provides a vehicle heating control device, including: an acquisition module, configured to acquire the current temperature information of the vehicle and the target coolant temperature, the target coolant temperature including the target water temperature of the passenger compartment and the target water temperature of the battery side, and the current temperature information including the current water temperature of the passenger compartment, the current water temperature of the battery side, and the current battery temperature; a power control module, configured to determine the heating priority according to the comparison result of the target water temperature of the passenger compartment and the target water temperature of the battery side, and control the output power of the heater based on the current water temperature of the passenger compartment and the target coolant temperature corresponding to the heating priority to heat the coolant in the passenger compartment; a valve adjustment module, configured to match the current battery temperature and the current water temperature of the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference; a valve control module, configured to perform opening and closing control on the three-way valve according to the reserved opening and closing water temperature difference, the target water temperature of the battery side, and the current water temperature of the battery side to control the coolant flow rate of the passenger compartment coolant flowing into the plate heat exchanger after being heated by the heater, and perform heat exchange on the battery coolant through the plate heat exchanger according to the heated passenger compartment coolant.

[0013] In an embodiment of the present application, the present application provides an electronic device, the electronic device includes: one or more processors; a storage device, configured to store one or more programs, when the one or more programs are executed by the one or more processors, enabling the electronic device to implement the vehicle heating control method according to any one of the above embodiments.

[0014] In an embodiment of the present application, the present application provides a computer-readable storage medium, on which a computer program is stored, when the computer program is executed by a processor of a computer, enabling the computer to execute the vehicle heating control method according to any one of the above embodiments.

[0015] The beneficial effects of the embodiments of the present application: The present application provides a vehicle heating control method, device, electronic device and storage medium. The embodiments of the present application match the current battery temperature and the current water temperature of the battery side with a preset mapping relationship respectively, so as to query and obtain a reserved opening and closing water temperature difference, realizing an increase in the opening and closing temperature return interval of the three-way valve through the reserved opening and closing water temperature difference, improving the temperature control accuracy; and performing opening and closing control on the three-way valve through the reserved opening and closing water temperature difference, the target water temperature of the battery side, and the current water temperature of the battery side, increasing the heat exchange time between the battery side and the passenger compartment, and improving the battery heating speed.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the drawings in the following description are only some embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0018] Figure 1 A schematic diagram showing an exemplary system architecture to which the technical solution of the embodiment of this application can be applied;

[0019] Figure 2 A schematic flowchart showing a vehicle heating control method according to an embodiment of this application;

[0020] Figure 3 A block diagram showing a vehicle heating control device according to an embodiment of this application;

[0021] Figure 4 A schematic diagram showing the structure of a computer system of an electronic device suitable for implementing the embodiment of this application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following uses specific specific examples to illustrate the implementation manners of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0023] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of this application in a schematic manner. Therefore, only the components related to this application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0024] In the following description, numerous details are explored to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0025] Please refer to Figure 1 , Figure 1 which shows a schematic diagram of an exemplary system architecture to which the technical solutions of the embodiments of the present application can be applied. As Figure 1 shown, the system architecture may include a controller 101, a PTC heater 102, a three-way valve 103, a water heating core 104, a first water pump 105, a plate heat exchanger 106, a second water pump 107, and a battery pack 108. Among them, the controller 101 is respectively connected to the PTC heater 102 and the three-way valve 103. The PTC heater 102 is also respectively connected to the output end of the first water pump 105 and the input end of the three-way valve 103. The water heating core is respectively connected to the first output end of the three-way valve 103 and the input end of the first water pump 105. The second output end of the three-way valve 103 is connected to the first input end of the plate heat exchanger 106. The first output end of the plate heat exchanger is connected to the input end of the first water pump 105. The battery pack 108 is respectively connected to the output end of the second water pump 107 and the second input end of the plate heat exchanger 106. The input end of the second water pump 107 is connected to the second output end of the plate heat exchanger 106. Solid arrows are used to represent the coolant flow direction, and dashed arrows are used to represent the control direction of the control signal. The controller 101 may be at least one of a microcomputer, an embedded computer, etc., and is used to control the output power of the PTC heater 102 and the opening and closing of the three-way valve 103.

[0026] Exemplarily, after the controller 101 obtains the current temperature information of the vehicle and the coolant target temperature, it determines the heating priority according to the comparison result of the target water temperature in the passenger compartment and the target water temperature on the battery side, and controls the output power of the heater based on the current water temperature in the passenger compartment and the coolant target temperature corresponding to the heating priority to heat the coolant in the passenger compartment; matches the current battery temperature and the current water temperature on the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference; controls the opening and closing of the three-way valve according to the reserved opening and closing water temperature difference, the target water temperature on the battery side, and the current water temperature on the battery side to control the coolant flow rate of the heated coolant in the passenger compartment flowing into the plate heat exchanger, and exchanges heat for the battery coolant through the plate heat exchanger according to the heated coolant in the passenger compartment; wherein, the coolant target temperature includes the target water temperature in the passenger compartment and the target water temperature on the battery side, and the current temperature information includes the current water temperature in the passenger compartment, the current water temperature on the battery side, and the current battery temperature.

[0027] In the related art, the three-way valve plays a role in heat distribution and can only cut off the heat inflow when a certain temperature reaches the preset temperature threshold to achieve the function of temperature control, resulting in inaccurate control of the water temperatures on the passenger compartment side and the battery side.

[0028] To solve the above technical problems, the present application provides a vehicle heating control method, device, electronic device, and storage medium. The implementation details of the technical solutions of the embodiments of the present application will be elaborated in detail below.

[0029] Please refer to Figure 2 , Figure 2 which shows a schematic flow chart of a vehicle heating control method according to an embodiment of the present application. As Figure 2 shown, in an exemplary embodiment, the vehicle heating control method at least includes steps S210 to S240, which are introduced in detail as follows:

[0030] Step S210, obtain the current temperature information of the vehicle and the target temperature of the coolant.

[0031] Among them, the target temperature of the coolant includes the target water temperature of the passenger compartment and the target water temperature of the battery side, and the current temperature information includes the current water temperature of the passenger compartment, the current water temperature of the battery side, and the current temperature of the battery.

[0032] In an embodiment of the present application, the battery management system (BMS) is used to obtain the target water temperature of the battery side and the current temperature of the battery, and the current water temperature of the battery side is collected by a sensor.

[0033] In an embodiment of the present application, the current temperature of the battery includes the highest battery cell temperature and the lowest battery cell temperature.

[0034] In an embodiment of the present application, the water temperature is used to represent the coolant temperature.

[0035] In an embodiment of the present application, the current water temperature of the passenger compartment is used to represent the first current water temperature corresponding to the liquid outlet of the heater, and the target water temperature of the passenger compartment is used to represent the first target water temperature corresponding to the liquid outlet of the heater.

[0036] In an embodiment of the present application, the current water temperature of the battery side is used to represent the second current water temperature corresponding to the liquid inlet of the battery pack, and the target water temperature of the battery side is used to represent the second target water temperature corresponding to the liquid inlet of the battery pack.

[0037] Step S220, determine the heating priority according to the comparison result of the target water temperature of the passenger compartment and the target water temperature of the battery side, and control the output power of the heater based on the current water temperature of the passenger compartment and the target temperature of the coolant corresponding to the heating priority to heat the coolant in the passenger compartment.

[0038] In an embodiment of the present application, determining the heating priority according to the comparison result of the target water temperature in the passenger compartment and the target water temperature on the battery side includes: if the target water temperature in the passenger compartment is greater than or equal to the target water temperature on the battery side, determining the heating priority as passenger compartment priority; if the target water temperature in the passenger compartment is less than the target water temperature on the battery side, determining the heating priority as battery priority.

[0039] In an embodiment of the present application, the heater includes a Positive Temperature Coefficient (PTC) heater.

[0040] In an embodiment of the present application, when the target water temperature in the passenger compartment is greater than or equal to the target water temperature on the battery side, controlling the output power of the PTC heater according to the temperature difference between the target water temperature in the passenger compartment and the current water temperature in the passenger compartment.

[0041] In an embodiment of the present application, when the target water temperature in the passenger compartment is less than the target water temperature on the battery side, taking the target water temperature on the battery side as the target water temperature in the passenger compartment, and controlling the output power of the PTC heater according to the temperature difference between the target water temperature in the passenger compartment and the current water temperature in the passenger compartment at this time.

[0042] In an embodiment of the present application, after determining the heating priority according to the comparison result of the target water temperature in the passenger compartment and the target water temperature on the battery side, the method further includes: if the heating priority is battery priority, controlling the temperature of the air conditioner according to the target water temperature in the passenger compartment and the current water temperature in the passenger compartment to cool down the passenger compartment.

[0043] In an embodiment of the present application, when the battery and the passenger compartment are heated and the target water temperature in the passenger compartment is less than the target water temperature on the battery side, since the heat source is only the PTC heater, at this time, taking the target water temperature on the battery side as the heating target of the passenger compartment, the air conditioner can rely on the cold and warm air dampers to adjust and control the temperature of the air conditioner outlet to meet the target water temperature in the passenger compartment corresponding to the heating demand of the passenger compartment. And the heat distribution through the three-way valve meets the target water temperature on the battery side corresponding to the battery heating target demand.

[0044] In an embodiment of the present application, the power output is controlled by proportional-integral (PI) regulation.

[0045] In an embodiment of the present application, the control formula for the output power is as follows:

[0046] P = k p *ΔT + k i *∫ΔTdt Equation (1)

[0047] Wherein, P is the output power of the PTC heater, k pk is a preset proportional constant, and ΔT is the control temperature difference between the current water temperature in the passenger compartment and the target coolant temperature corresponding to the heating priority. i k is a preset integral constant.

[0048] Step S230: Match the current battery temperature and the current water temperature on the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference.

[0049] In an embodiment of the present application, the preset mapping relationship is used to characterize the relationship between the reserved opening and closing temperature differences and the current battery temperature and the current water temperature on the battery side respectively.

[0050] In an embodiment of the present application, before matching the current battery temperature and the current water temperature on the battery side with the preset mapping relationship respectively to obtain the reserved opening and closing water temperature difference, the method further includes: Based on different current water temperatures on the battery side and different highest battery cell temperatures, set corresponding reserved closing water temperature differences according to a preset first temperature difference configuration rule, and establish a first mapping relationship between the current water temperature on the battery side, the highest battery cell temperature, and the reserved closing water temperature difference; Based on different current water temperatures on the battery side and different lowest battery cell temperatures, set corresponding reserved opening water temperature differences according to a preset second temperature difference configuration rule, and establish a second mapping relationship between the current water temperature on the battery side, the lowest battery cell temperature, and the reserved opening water temperature difference; wherein, the preset first temperature difference configuration rule includes a rule set with the goal that the reserved closing water temperature difference decreases as at least one of the current water temperature on the battery side and the highest battery cell temperature increases, the preset second temperature difference configuration rule includes a rule set with the goal that the reserved opening water temperature difference increases as at least one of the current water temperature on the battery side and the lowest battery cell temperature increases, both the reserved opening water temperature difference and the reserved closing water temperature difference are greater than or equal to zero, and the preset mapping relationship includes the first mapping relationship and the second mapping relationship.

[0051] In an embodiment of the present application, the reserved closing water temperature difference can be determined according to the current water temperature on the battery side and the highest battery cell temperature through the first mapping relationship. Compared with looking up a table between the target water temperature on the battery side and the current water temperature on the battery side alone, introducing the highest battery cell temperature to look up the first mapping relationship can relatively reduce the reserved closing water temperature difference within the normal range of the battery cell temperature, thereby increasing the upper limit of the valve closing temperature and improving the closing control accuracy of the three-way valve. The first mapping relationship is shown in Table 1:

[0052] Table 1 First Mapping Relationship

[0053] C(-10) C(0) C(10) C(20) C(30) B(10) X(10) X(10) X(10) X(0) X(0) B(20) X(10) X(9) X(8) X(0) X(0) B(30) X(9) X(8) X(6) X(0) X(0) B(40) X(8) X(7) X(4) X(0) X(0) B(45) X(8) X(6) X(2) X(0) X(0)

[0054] Wherein, B is the current water temperature on the battery side, C is the highest battery cell temperature, X is the reserved closing water temperature difference, the numbers in the brackets are the temperatures corresponding to B, C, and X, and X is greater than or equal to 0.

[0055] In an embodiment of the present application, for example, when the current water temperature on the battery side is 20°C and the highest battery cell temperature increases from -10°C to 20°C, the reserved closing water temperature difference decreases from 10°C, 9°C, 8°C, and even decreases to 0°C. Thus, when the current water temperature on the battery side remains unchanged, during the heating process of the highest battery cell temperature, the closing control accuracy of the three-way valve becomes higher and higher. For another example, when the highest battery cell temperature is 10°C and the current water temperature on the battery side increases from 10°C to 45°C, the reserved closing water temperature difference decreases from 10°C, 9°C, 8°C, 7°C, 6°C, 4°C, 2°C. Thus, when the highest battery cell temperature remains unchanged, during the heating process of the current water temperature on the battery side, the closing control accuracy of the three-way valve becomes higher and higher. By presetting the first temperature difference configuration rule for setting the reserved closing water temperature difference, the present application realizes that as the highest battery cell temperature and the current water temperature on the battery side increase, the closing control accuracy of the three-way valve gradually increases.

[0056] In an embodiment of the present application, the reserved opening water temperature difference can be determined according to the current water temperature on the battery side and the lowest battery cell temperature through the second mapping relationship. Introducing the lowest battery cell temperature to query the second mapping relationship can relatively increase the reserved opening water temperature difference within the normal range of the battery cell temperature, thereby increasing the range of the valve opening temperature and improving the opening control accuracy of the three-way valve.

[0057] The second mapping relationship is shown in Table 2:

[0058] Table 2 Second Mapping Relationship

[0059] D(-10) D(0) D(10) D(20) D(30) B(10) Y(0) Y(0) Y(0) Y(0) Y(2) B(20) Y(0) Y(0) Y(0) Y(0) Y(4) B(30) Y(0) Y(0) Y(0) Y(2) Y(6) B(40) Y(0) Y(0) Y(2) Y(4) Y(8) B(45) Y(0) Y(0) Y(4) Y(6) Y(10)

[0060] Among them, B is the current water temperature on the battery side, D is the lowest battery cell temperature, Y is the reserved opening water temperature difference, and the numbers in parentheses are the temperatures corresponding to B, D, and Y. Y is greater than or equal to 0.

[0061] In an embodiment of the present application, for example, when the current water temperature on the battery side is 40 °C, and the lowest battery cell temperature increases from -10 °C to 20 °C, the reserved opening water temperature difference increases from 0, 2 °C, 4 °C, 8 °C, so that when the current water temperature on the battery side remains unchanged, during the heating process of the lowest battery cell temperature, the opening control accuracy of the three-way valve becomes higher and higher. For another example, when the lowest battery cell temperature is 20 °C, and the current water temperature on the battery side increases from 10 °C to 45 °C, the reserved opening water temperature difference increases from 0 °C, 2 °C, 4 °C, 6 °C, so that when the lowest battery cell temperature remains unchanged, during the heating process of the current water temperature on the battery side, the opening control accuracy of the three-way valve becomes higher and higher. By presetting the second temperature difference configuration rule for setting the reserved opening water temperature difference, the present application realizes that as the lowest battery cell temperature and the current water temperature on the battery side increase, the opening control accuracy of the three-way valve gradually increases.

[0062] In an embodiment of the present application, by changing the opening control accuracy and closing control accuracy of the three-way valve, the temperature control accuracy is improved.

[0063] In an embodiment of the present application, the current battery temperature and the current water temperature on the battery side are respectively matched with a preset mapping relationship to obtain a reserved opening and closing water temperature difference, including: matching the current water temperature on the battery side and the highest battery cell temperature with a first mapping relationship respectively to obtain a reserved closing water temperature difference, and the first mapping relationship is used to characterize the relationship between the reserved closing water temperature difference, the current water temperature on the battery side and the highest battery cell temperature; matching the current water temperature on the battery side and the lowest battery cell temperature with a second mapping relationship respectively to obtain a reserved opening water temperature difference, and the second mapping relationship is used to characterize the relationship between the reserved opening water temperature difference, the current water temperature on the battery side and the lowest battery cell temperature; wherein, the reserved opening and closing water temperature difference includes the reserved opening water temperature difference and the reserved closing water temperature difference, the current battery temperature includes the lowest battery cell temperature and the highest battery cell temperature, and the preset mapping relationship includes the first mapping relationship and the second mapping relationship.

[0064] In an embodiment of the present application, multiple battery cell temperatures in the current battery temperature and the current water temperature on the battery side are respectively matched with a preset mapping relationship to query the preset mapping relationship and obtain a preset opening and closing water temperature difference.

[0065] Step S240, perform opening and closing control on the three-way valve according to the reserved opening and closing water temperature difference, the target water temperature on the battery side and the current water temperature on the battery side, so as to control the coolant flow rate of the passenger compartment coolant heated by the heater flowing into the plate heat exchanger, and exchange heat between the battery coolant and the heated passenger compartment coolant through the plate heat exchanger.

[0066] In one embodiment of the present application, the opening and closing control of the three-way valve is performed according to the reserved opening and closing water temperature difference, the target water temperature on the battery side, and the current water temperature on the battery side, including: determining the valve opening temperature and the valve closing temperature according to the reserved opening and closing water temperature difference and the target water temperature on the battery side; if the current water temperature on the battery side is less than or equal to the valve opening temperature, opening the three-way valve; if the current water temperature on the battery side is greater than or equal to the valve closing temperature, closing the three-way valve.

[0067] In one embodiment of the present application, determining the valve opening temperature and the valve closing temperature according to the reserved opening and closing water temperature difference and the target water temperature on the battery side includes: taking the difference between the target water temperature on the battery side and the reserved opening water temperature difference as the valve opening temperature; taking the sum of the target water temperature on the battery side and the reserved closing water temperature difference as the valve closing temperature; wherein, the reserved opening and closing water temperature difference includes the reserved opening water temperature difference and the reserved closing water temperature difference.

[0068] In one embodiment of the present application, the target water temperature on the battery side is denoted as A, the current water temperature on the battery side is denoted as B, the highest battery cell temperature is denoted as C, the lowest battery cell temperature is denoted as D, the reserved closing water temperature difference is denoted as X, and the reserved opening water temperature difference is denoted as Y.

[0069] In one embodiment of the present application, when B≥A + X, the three-way valve is closed and heat exchange on the battery side is not allowed.

[0070] In one embodiment of the present application, as shown in Table 1, when the highest battery cell temperature is greater than or equal to the preset first threshold and the current water temperature on the battery side is greater than or equal to the preset second threshold, that is, when both the battery cell temperature and the current water temperature on the battery side are relatively high, the three-way valve is closed to protect the battery pack and avoid overheating.

[0071] In one embodiment of the present application, when B≤A - Y, the three-way valve is opened to allow heat exchange on the battery side.

[0072] In one embodiment of the present application, as shown in Table 2, the three-way valve is opened when the battery cell temperature and the current water temperature on the battery side are appropriate to increase heat exchange on the battery side.

[0073] In one embodiment of the present application, compared with looking up the table based on the target water temperature on the battery side and the current water temperature on the battery side alone, introducing the lowest battery cell temperature D and the highest battery cell temperature C to look up the preset mapping relationship can relatively increase X and decrease Y within the normal range of the battery cell temperature, so that the upper limit of the valve closing temperature corresponding to A + X increases, and the range of the valve opening temperature corresponding to A - Y increases, increasing the heat exchange time and the heat exchange temperature range for heat exchange on the battery side through the plate heat exchanger.

[0074] In one embodiment of the present application, when heating is required on both the passenger compartment side and the battery side, the target water temperature of the passenger compartment is always used as the control target. When the heating demand on the battery side is greater than that on the passenger compartment side, that is, when the target water temperature on the battery side is higher than the target water temperature on the passenger compartment side, the heating demand of the battery is converted into the heating demand of the passenger compartment, that is, the target water temperature of the battery is converted into the target water temperature of the passenger compartment, to control the heating demand of the passenger compartment. The opening degree control of the three-way valve simultaneously uses the actual water temperature difference between the target water temperature on the battery side and the current water temperature on the battery side, the highest battery cell temperature, and the lowest battery cell temperature as conditions, increases the opening and closing temperature reset interval of the three-way valve, increases the heat exchange time between the battery side and the passenger compartment, and improves the battery heating speed.

[0075] Please refer to Figure 3 , Figure 3 which shows a block diagram of a vehicle heating control device according to an embodiment of the present application. This device can be applied to Figure 1 the implementation environment shown, and is specifically configured in the controller 101. This device can also be applicable to other exemplary implementation environments and is specifically configured in other devices. This embodiment does not limit the implementation environment applicable to this device.

[0076] As Figure 3 shown, a vehicle heating control device 300 according to an embodiment of the present application includes: an acquisition module 301, a power control module 302, a valve adjustment module 303, and a valve control module 304.

[0077] The acquisition module 301 is configured to acquire the current temperature information of the vehicle and the coolant target temperature, where the coolant target temperature includes the target water temperature of the passenger compartment and the target water temperature of the battery side, and the current temperature information includes the current water temperature of the passenger compartment, the current water temperature of the battery side, and the current battery temperature;

[0078] The power control module 302 is configured to determine the heating priority according to the comparison result between the target water temperature of the passenger compartment and the target water temperature of the battery side, and control the output power of the heater based on the current water temperature of the passenger compartment and the coolant target temperature corresponding to the heating priority to heat the coolant in the passenger compartment;

[0079] The valve adjustment module 303 is configured to match the current battery temperature and the current water temperature of the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference;

[0080] The valve control module 304 is configured to perform opening and closing control on the three-way valve according to the reserved opening and closing water temperature difference, the target water temperature of the battery side, and the current water temperature of the battery side, to control the coolant flow rate of the passenger compartment coolant flowing into the plate heat exchanger after being heated by the heater, and perform heat exchange on the battery coolant through the plate heat exchanger according to the heated passenger compartment coolant.

[0081] It should be noted that the vehicle heating control device provided in the above embodiments and the vehicle heating control method provided in the above embodiments belong to the same concept. The specific ways in which each module and unit perform operations have been described in detail in the method embodiments, and will not be elaborated here. In practical applications, the vehicle heating control device provided in the above embodiments can, as needed, allocate the above functions to different functional modules, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above. This is not limited here either.

[0082] An embodiment of the present application further provides an electronic device, including: one or more processors; a storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the vehicle heating control method provided in each of the above embodiments.

[0083] Please refer to Figure 4 , Figure 4 , which shows a schematic structural diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application. It should be noted that Figure 4 the computer system 400 of the electronic device shown is only an example and should not impose any limitation on the functions and usage scope of the embodiments of the present application.

[0084] As Figure 4 shown, the computer system 400 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 402 or the program loaded from the storage section 408 into the random access memory (RAM) 403, such as executing the method in the above embodiments. In the RAM 403, various programs and data required for system operation are also stored. The CPU 401, ROM 402, and RAM 403 are connected to each other through a bus 404. The input / output (I / O) interface 405 is also connected to the bus 404.

[0085] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, a mouse, etc.; an output section 407 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. A removable medium 411 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is installed on the drive 410 as needed so that a computer program read therefrom is installed into the storage section 408 as needed.

[0086] Specifically, according to an embodiment of the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, an embodiment of the present application includes a computer program product including a computer program carried on a computer-readable medium, the computer program including a computer program for performing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 409, and / or installed from the removable medium 411. When the computer program is executed by a central processing unit (CPU) 401, various functions defined in the system of the present application are executed.

[0087] It should be noted that the computer-readable medium shown in the embodiments of the present application may be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. A computer-readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as a part of a carrier wave, which carries a computer-readable computer program. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium may be transmitted by any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0088] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. Among them, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the above module, program segment, or part of 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 blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0089] The units involved in the embodiments described in this application can be implemented in software or in hardware, and the described units can also be provided in a processor. Among them, the names of these units do not, in some cases, constitute a limitation on the units themselves. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of this application.

[0090] Another aspect of this application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor of the computer, the computer is enabled to execute the vehicle heating control method provided in each of the above embodiments. The computer-readable storage medium can be included in the electronic device described in the above embodiments, or can exist alone without being assembled into the electronic device.

[0091] In the above embodiments, unless otherwise specified, when using serial numbers such as "first" and "second" to describe a common object, it only represents different instances of the same object, rather than indicating that the object to be described must be in a given order, whether in terms of time, space, sorting, or any other way.

[0092] The above embodiments only exemplarily illustrate the principles and effects of this application, rather than being used to limit this application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in this application should still be covered by the claims of this application.

Claims

1. A vehicle heating control method, characterized in that, The method includes: Obtaining the current temperature information of the vehicle and the target temperature of the coolant, where the target temperature of the coolant includes the target water temperature of the passenger compartment and the target water temperature of the battery side, and the current temperature information includes the current water temperature of the passenger compartment, the current water temperature of the battery side, and the current temperature of the battery; Determining the heating priority according to the comparison result between the target water temperature of the passenger compartment and the target water temperature of the battery side, and controlling the output power of the heater based on the current water temperature of the passenger compartment and the target temperature of the coolant corresponding to the heating priority to heat the coolant in the passenger compartment; Matching the current temperature of the battery and the current water temperature of the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference; Controlling the opening and closing of a three-way valve according to the reserved opening and closing water temperature difference, the target water temperature of the battery side, and the current water temperature of the battery side to control the coolant flow rate of the passenger compartment coolant heated by the heater flowing into the plate heat exchanger, and exchanging heat for the battery coolant through the plate heat exchanger according to the heated passenger compartment coolant; Matching the current temperature of the battery and the current water temperature of the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference, including: Matching the current water temperature of the battery side and the highest battery cell temperature with a first mapping relationship respectively to obtain a reserved closing water temperature difference, where the first mapping relationship is used to characterize the relationship between the reserved closing water temperature difference, the current water temperature of the battery side, and the highest battery cell temperature; Matching the current water temperature of the battery side and the lowest battery cell temperature with a second mapping relationship respectively to obtain a reserved opening water temperature difference, where the second mapping relationship is used to characterize the relationship between the reserved opening water temperature difference, the current water temperature of the battery side, and the lowest battery cell temperature; Wherein, the reserved opening and closing water temperature difference includes the reserved opening water temperature difference and the reserved closing water temperature difference, the current temperature of the battery includes the lowest battery cell temperature and the highest battery cell temperature, and the preset mapping relationship includes the first mapping relationship and the second mapping relationship.

2. The vehicle heating control method according to claim 1, wherein Controlling the opening and closing of the three-way valve according to the reserved opening and closing water temperature difference, the target water temperature of the battery side, and the current water temperature of the battery side includes: Determining a valve opening temperature and a valve closing temperature according to the reserved opening and closing water temperature difference and the target water temperature of the battery side; If the current water temperature of the battery side is less than or equal to the valve opening temperature, opening the three-way valve; If the current water temperature of the battery side is greater than or equal to the valve closing temperature, closing the three-way valve.

3. The vehicle heating control method according to claim 2, characterized in that, Determining a valve opening temperature and a valve closing temperature according to the reserved opening and closing water temperature difference and the target water temperature of the battery side includes: Taking the difference between the target water temperature of the battery side and the reserved opening water temperature difference as the valve opening temperature; Taking the sum of the target water temperature of the battery side and the reserved closing water temperature difference as the valve closing temperature; Wherein, the reserved opening and closing water temperature difference includes the reserved opening water temperature difference and the reserved closing water temperature difference.

4. The vehicle heating control method according to claim 1, wherein, Before matching the current temperature of the battery and the current water temperature of the battery side with a preset mapping relationship respectively to obtain a reserved opening and closing water temperature difference, the method further includes: Based on different current water temperatures on the battery side and different highest battery cell temperatures, set corresponding reserved shutdown water temperature differences according to a preset first temperature difference configuration rule, and establish a first mapping relationship among the current water temperature on the battery side, the highest battery cell temperature, and the reserved shutdown water temperature difference; Based on different current water temperatures on the battery side and different lowest battery cell temperatures, set corresponding reserved startup water temperature differences according to a preset second temperature difference configuration rule, and establish a second mapping relationship among the current water temperature on the battery side, the lowest battery cell temperature, and the reserved startup water temperature difference; Wherein, the preset first temperature difference configuration rule includes a rule set with the goal that the reserved shutdown water temperature difference decreases as at least one of the current water temperature on the battery side and the highest battery cell temperature increases, the preset second temperature difference configuration rule includes a rule set with the goal that the reserved startup water temperature difference increases as at least one of the current water temperature on the battery side and the lowest battery cell temperature increases, both the reserved startup water temperature difference and the reserved shutdown water temperature difference are greater than or equal to zero, and the preset mapping relationship includes the first mapping relationship and the second mapping relationship.

5. The vehicle heating control method according to any one of claims 1-4, characterized in that Determine the heating priority according to the comparison result between the target water temperature in the passenger compartment and the target water temperature on the battery side, including: If the target water temperature in the passenger compartment is greater than or equal to the target water temperature on the battery side, determine the heating priority as passenger compartment priority; If the target water temperature in the passenger compartment is less than the target water temperature on the battery side, determine the heating priority as battery priority.

6. The vehicle heating control method according to claim 5, wherein After determining the heating priority according to the comparison result between the target water temperature in the passenger compartment and the target water temperature on the battery side, the method further includes: If the heating priority is battery priority, control the temperature of the air conditioner according to the target water temperature in the passenger compartment and the current water temperature in the passenger compartment to cool the passenger compartment.

7. A vehicle heating control device, characterized in that, The device includes: An acquisition module, configured to acquire the current temperature information of the vehicle and the target coolant temperature, the target coolant temperature includes the target water temperature in the passenger compartment and the target water temperature on the battery side, and the current temperature information includes the current water temperature in the passenger compartment, the current water temperature on the battery side, and the current battery temperature; A power control module, configured to determine the heating priority according to the comparison result between the target water temperature in the passenger compartment and the target water temperature on the battery side, and control the output power of the heater based on the current water temperature in the passenger compartment and the target coolant temperature corresponding to the heating priority to heat the coolant in the passenger compartment; A valve adjustment module, configured to match the current battery temperature and the current water temperature on the battery side with the preset mapping relationship respectively to obtain the reserved opening and closing water temperature differences; A valve control module, configured to perform opening and closing control on a three-way valve according to the reserved opening and closing water temperature differences, the target water temperature on the battery side, and the current water temperature on the battery side, so as to control the coolant flow rate of the passenger compartment coolant flowing into the plate heat exchanger after being heated by the heater, and perform heat exchange on the battery coolant through the plate heat exchanger according to the heated passenger compartment coolant; Matching the current battery temperature and the current water temperature on the battery side with the preset mapping relationship respectively to obtain the reserved opening and closing water temperature differences, including: Match the current water temperature on the battery side and the highest battery cell temperature with a first mapping relationship respectively to obtain a reserved shutdown water temperature difference, where the first mapping relationship is used to characterize the relationship between the reserved shutdown water temperature difference, the current water temperature on the battery side and the highest battery cell temperature; Match the current water temperature on the battery side and the lowest battery cell temperature with a second mapping relationship respectively to obtain a reserved startup water temperature difference, where the second mapping relationship is used to characterize the relationship between the reserved startup water temperature difference, the current water temperature on the battery side and the lowest battery cell temperature; Wherein, the reserved opening and closing water temperature difference includes the reserved startup water temperature difference and the reserved shutdown water temperature difference, the current battery temperature includes the lowest battery cell temperature and the highest battery cell temperature, and the preset mapping relationship includes the first mapping relationship and the second mapping relationship.

8. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs, which when executed by the one or more processors, cause the electronic device to implement the vehicle heating control method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, A computer program is stored thereon, which when executed by a processor of a computer, causes the computer to execute the vehicle heating control method according to any one of claims 1 to 6.

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