Heating control method for hybrid vehicle, storage medium and electronic equipment

Abstract

The invention provides a heating control method for a hybrid vehicle, a storage medium and electronic equipment. The heating control method comprises the steps that a heating demand signal is obtained; if the engine is in the non-starting state, the first temperature of a medium in an engine temperature control loop is obtained; if the first temperature is smaller than the set starting temperature, connection between the engine temperature control loop and the battery temperature control loop and connection between the engine temperature control loop and the vehicle cabin temperature control loop are cut off; the PTC heating unit is controlled to be started, a medium in an engine temperature control loop is heated, and the engine is controlled to be started until the first temperature reaches the set starting temperature; the PTC heating unit continues to heat the medium in the engine temperature control loop, and the second temperature of the medium in the engine temperature control loop is obtained; and if the second temperature reaches the first set temperature threshold value, the engine temperature control loop and the battery temperature control loop and / or the engine temperature control loop and the vehicle cabin temperature control loop are communicated according to the heating demand signal. According to the scheme, waste heat of the engine can be fully utilized, PTC heating units are used as few as possible, and power consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of thermal management control technology for hybrid vehicles, specifically to a heating control method, storage medium, and electronic equipment for hybrid vehicles. Background Technology

[0002] Compared to traditional vehicles, plug-in hybrid electric vehicles (hereinafter referred to as hybrid vehicles) require batteries to be heated to operate normally in low-temperature environments. Therefore, the heating system of hybrid vehicles includes not only engine temperature control circuit and cabin temperature control circuit, but also battery temperature control circuit. The main component used to perform the heating function in the above temperature control circuits is the PTC heating unit.

[0003] To reduce operating costs, hybrid vehicles prioritize battery power during driving. To enhance user experience, once a heating request is received from the cabin, the primary task is to meet the heating requirement, regardless of the vehicle's location. This leads to a heavy reliance on PTC heating. However, PTC heating units themselves consume a lot of electricity. Prolonged use of PTC heating units as a heat source will cause the battery to deplete faster, affecting the battery's range. Summary of the Invention

[0004] The technical problem to be solved by this application is that the heating control strategy of hybrid vehicles in the prior art uses PTC heating units to meet heating needs, which consumes a lot of electricity and affects battery range. Therefore, this application provides a heating control method, storage medium and electronic equipment for hybrid vehicles.

[0005] Firstly, the technical solution of this application provides a heating control method for a hybrid vehicle, including:

[0006] Acquire heating demand signals, including battery heating signals and / or vehicle cabin heating signals;

[0007] Determine if the vehicle's engine is running;

[0008] If the engine is not started, the first temperature of the medium in the engine temperature control circuit is obtained;

[0009] If the first temperature is lower than the set start-up temperature, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit.

[0010] The PTC heating unit is controlled to start, heating the medium in the engine temperature control circuit until the first temperature reaches the set start temperature, after which the engine is controlled to start.

[0011] The PTC heating unit continues to heat the medium in the engine temperature control circuit to obtain a second temperature of the medium in the engine temperature control circuit;

[0012] If the second temperature reaches the first set temperature threshold, then the engine temperature control circuit and the battery temperature control circuit, and / or the engine temperature control circuit and the vehicle cabin temperature control circuit are connected according to the heating demand signal.

[0013] Preferably, in the hybrid vehicle heating control method, the PTC heating unit is activated to heat the medium in the engine temperature control circuit until the first temperature reaches the set start-up temperature, after which the engine is started.

[0014] The operating power of the PTC heating unit is controlled based on the difference between the first temperature and the set start-up temperature; the smaller the difference, the lower the operating power.

[0015] Preferably, the hybrid vehicle heating control method further includes:

[0016] Obtain the real-time temperature of the medium in the engine temperature control circuit;

[0017] If the real-time temperature exceeds the second set temperature threshold, the PTC heating unit is controlled to shut down.

[0018] Preferably, in the hybrid vehicle heating control method, if the real-time temperature exceeds a second set temperature threshold, the PTC heating unit is controlled to shut down.

[0019] The second set temperature threshold is determined based on the heating demand signal, including:

[0020] If the heating demand signal includes the battery heating signal and the cabin heating signal, then the second set temperature threshold is the first temperature value;

[0021] If the heating demand signal only includes the cabin heating signal, then the second set temperature threshold is the second temperature value;

[0022] If the heating demand signal only includes the battery heating signal, then the second set temperature threshold is the third temperature value;

[0023] Wherein, the first temperature value > the second temperature value > the third temperature value.

[0024] Preferably, in the hybrid vehicle heating control method, after determining whether the vehicle's engine is running, if the engine is running, the method further includes:

[0025] Determine whether the engine meets the cold start conditions;

[0026] If the engine meets the cold start conditions, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit.

[0027] The PTC heating unit is turned on to heat the medium in the engine temperature control circuit until the temperature of the medium in the engine temperature control circuit reaches the first set temperature threshold. Then, the engine temperature control circuit is connected to the battery temperature control circuit and / or the engine temperature control circuit is connected to the vehicle cabin temperature control circuit according to the heating demand signal.

[0028] Furthermore, if the engine does not meet the cold start conditions, the third temperature of the medium in the engine temperature control circuit is obtained;

[0029] If the third temperature is less than the first set temperature threshold, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit; control the PTC heating unit to turn on, heat the medium in the engine temperature control circuit and obtain the fourth temperature of the medium in the engine temperature control circuit in real time;

[0030] If the fourth temperature reaches the first set temperature threshold, then the engine temperature control circuit and the battery temperature control circuit, and / or the engine temperature control circuit and the vehicle cabin temperature control circuit are connected according to the heating demand signal.

[0031] Preferably, the hybrid vehicle heating control method, wherein connecting the engine temperature control circuit to the battery temperature control circuit and / or the engine temperature control circuit to the vehicle cabin temperature control circuit according to the heating demand signal, further includes:

[0032] The battery heat requirement is determined based on the battery heating signal.

[0033] The first distribution ratio of the medium in the engine temperature control circuit to the battery temperature control circuit is determined based on the battery heat demand.

[0034] And / or,

[0035] The heat demand of the vehicle cabin is determined based on the cabin heating signal.

[0036] The second distribution ratio of the medium in the engine temperature control circuit to the vehicle cabin temperature control circuit is determined based on the heat demand of the vehicle cabin.

[0037] Preferably, the hybrid vehicle heating control method, wherein determining the first allocation ratio of the medium in the engine temperature control circuit to the battery temperature control circuit according to the battery heat demand, further includes: controlling the speed of the water pump in the engine temperature control circuit according to the first allocation ratio;

[0038] The step of determining the second allocation ratio of the medium in the engine temperature control circuit to the vehicle compartment temperature control circuit based on the heat demand of the vehicle compartment further includes: controlling the speed of the water pump in the engine temperature control circuit according to the second allocation ratio.

[0039] Secondly, the present application provides a computer-readable storage medium storing program information, wherein a computer reads the program information and executes the steps of the hybrid vehicle heating control method described in any of the technical solutions of the first aspect.

[0040] Thirdly, the present application provides a computer program product, including a computer program / instructions, which, when executed by a processor, implements the steps of the hybrid vehicle heating control method described in any of the first aspects.

[0041] Fourthly, the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the hybrid vehicle heating control method described in any of the first aspects.

[0042] The technical solution provided in this application has the following technical effects compared with the prior art:

[0043] The hybrid vehicle heating control method, storage medium, and electronic equipment provided in this application, upon receiving a heating demand signal, first determine whether the engine is running. If the engine is not running, it further determines whether the first temperature of the medium in the engine temperature control circuit meets the engine starting requirements. If the first temperature is lower than the set starting temperature, the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit, is disconnected. The PTC heating unit is then activated to heat the engine temperature control circuit separately until the first temperature reaches the set starting temperature, meeting the engine starting requirements. At this point, the engine is started. During engine operation, the engine's own heat dissipation and the PTC heating unit together provide heat to the medium in the engine temperature control circuit, causing the medium temperature in the engine temperature control circuit to continue to rise. During this process, the second temperature of the medium in the engine temperature control circuit is simultaneously acquired. When the second temperature reaches the first set temperature threshold, it indicates that the medium temperature in the engine temperature control circuit is high enough to meet the standard for recycling. At this point, the engine temperature control circuit is connected to the battery temperature control circuit, and / or the engine temperature control circuit is connected to the vehicle compartment temperature control circuit according to the heating demand signal. The heat dissipation medium in the engine temperature control circuit can provide heat to the battery temperature control circuit and / or the vehicle compartment temperature control circuit, reduce the burden on the PTC heating unit, reduce the power consumption of the PTC heating unit, and ensure that the battery power is used to provide range as much as possible, thereby improving the battery's range. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of the hybrid vehicle engine temperature control circuit, battery temperature control circuit, and cabin temperature control circuit described in the embodiments of this application;

[0045] Figure 2 This is a flowchart of a hybrid vehicle heating control method according to one embodiment of this application;

[0046] Figure 3 This is a flowchart of a hybrid vehicle heating control method according to another embodiment of this application;

[0047] Figure 4 This is a schematic diagram of the hardware connections of an electronic device that performs a hybrid vehicle heating control method according to an embodiment of this application. Detailed Implementation

[0048] The specific embodiments of this application will be further described below with reference to the accompanying drawings.

[0049] It is readily understood that, based on the technical solution of this application, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of the application.

[0050] This application provides a heating control method for hybrid vehicles, applied in the controller of a hybrid vehicle. The controller can be a vehicle controller or a control unit related to the heating circuit control. The method is used to... Figure 1 The heating circuit of the hybrid vehicle shown is controlled. Figure 1 As shown, the heating circuit includes an engine temperature control circuit, a battery temperature control circuit, and a cabin temperature control circuit. The engine temperature control circuit includes a water pump B1, the cabin temperature control circuit includes a water pump B2, and the battery temperature control circuit includes a water pump B3. A first solenoid valve Z1 is installed between the engine temperature control circuit, the cabin temperature control circuit, and the PTC heating unit circuit. A second solenoid valve Z2 is installed between the PTC heating unit, the cabin temperature control circuit, and the heat exchanger. The heat exchanger is connected in series in the battery temperature control circuit. Therefore, this application's solution can achieve mutual heat exchange between the engine temperature control circuit, the battery temperature control circuit, and the cabin temperature control circuit by controlling the conduction mode of the first solenoid valve Z1 and the second solenoid valve Z2, and can also enable the heat provided by the PTC heating unit to be used for heating any one or more temperature control circuits. Each temperature control circuit is equipped with temperature sensors, pressure sensors, flow sensors, etc., to monitor the medium temperature, pipe pressure, and medium flow rate and velocity in the temperature control circuit, thereby ensuring the safe and stable operation of the heating circuit.

[0051] like Figure 2 As shown, the hybrid vehicle heating control method provided in this embodiment includes the following steps:

[0052] S10: Obtain heating demand signals, including battery heating signals and / or vehicle cabin heating signals.

[0053] Hybrid vehicles are powered by both a battery and an engine. Typically, for economic and environmental reasons, the battery is prioritized as the power source during startup and operation. This step involves acquiring a heating demand signal under the premise that the battery is the power source. The battery heating signal is provided by the Battery Management System (BMS), and the cabin heating signal is provided by the onboard air conditioning controller. The heating demand signal may include either one of these signals or both.

[0054] After obtaining the heating demand signal, determine whether the vehicle's engine is running, and then execute step S20.

[0055] S20: If the engine is not started, obtain the first temperature of the medium in the engine temperature control circuit.

[0056] The first temperature is collected using a temperature sensor in the engine temperature control circuit.

[0057] S30: If the first temperature is lower than the set start-up temperature, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit.

[0058] The starting temperature is set to a preset value, suitable for engine starting and normal operation. If the initial temperature is insufficient for normal engine starting, the medium in the engine temperature control circuit needs to be heated first. Therefore, the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit, isolating the engine temperature control circuit. This can be achieved by controlling the first port 11 and the second port 13 of the first solenoid valve Z1 to be open, and the first port 21 and the third port of the second solenoid valve Z2 to be open. This disables the heat exchange function of the plate heat exchanger, making it only a medium flow path and not involved in heat exchange. At this time, the PTC heating unit is connected.

[0059] S40: Control the PTC heating unit to start, heat the medium in the engine temperature control circuit, and control the engine to start after the first temperature reaches the set start temperature.

[0060] According to the operation in step S30, the heat energy provided by the PTC heating unit is only used to heat the medium in the engine temperature control circuit. Therefore, the temperature value of the medium in the engine temperature control circuit can be raised to the first temperature relatively quickly. When the temperature of the medium in the engine temperature control circuit meets the normal starting and running conditions of the engine, the engine is started.

[0061] S50: The PTC heating unit continues to heat the medium in the engine temperature control circuit to obtain the second temperature of the medium in the engine temperature control circuit.

[0062] In the aforementioned steps, the temperature of the medium in the engine temperature control circuit is sufficient to support normal engine start-up and operation, but it does not yet meet the conditions for recycling. Therefore, after the engine starts, the PTC heating unit continues to heat the medium in the engine temperature control circuit until it meets the conditions for recycling.

[0063] S60: If the second temperature reaches the first set temperature threshold, then the engine temperature control circuit and the battery temperature control circuit, and / or the engine temperature control circuit and the vehicle cabin temperature control circuit are connected according to the heating demand signal.

[0064] When the temperature of the medium in the engine temperature control circuit reaches the first set temperature threshold, it indicates that the engine temperature control circuit still has residual heat that can be recovered and utilized, supplementing the battery temperature control circuit and / or the vehicle cabin temperature control circuit, while supporting normal engine operation. Therefore, in this case, the engine temperature control circuit is connected to the battery temperature control circuit, and / or the engine temperature control circuit is connected to the vehicle cabin temperature control circuit, based on the heating demand signal.

[0065] The above-described solution provided in this embodiment, after obtaining the heating demand signal, first determines whether the engine is running. If the engine is not running, it continues to determine whether the first temperature of the medium in the engine temperature control circuit meets the engine starting requirements. If the first temperature is lower than the set starting temperature, the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle cabin temperature control circuit, is disconnected. The PTC heating unit is then activated to heat the engine temperature control circuit separately until the first temperature reaches the set starting temperature, meeting the engine starting requirements. At this time, the engine is started. During engine operation, the engine's own heat dissipation and the PTC heating unit together provide heat to the medium in the engine temperature control circuit, causing the medium temperature in the engine temperature control circuit to continue to rise. During this process, the second temperature of the medium in the engine temperature control circuit is simultaneously obtained. When the second temperature reaches the first set temperature threshold, it indicates that the medium temperature in the engine temperature control circuit is high enough to meet the standard for recycling. At this time, the engine temperature control circuit is connected to the battery temperature control circuit, and / or the engine temperature control circuit is connected to the vehicle cabin temperature control circuit according to the heating demand signal. The heat dissipation medium in the engine temperature control circuit can provide heat to the battery temperature control circuit and / or the vehicle compartment temperature control circuit, reduce the burden on the PTC heating unit, reduce the power consumption of the PTC heating unit, and ensure that the battery power is used to provide range as much as possible, thereby improving the battery's range.

[0066] Preferably, in the above scheme, during step S40, the PTC heating unit is started to heat the medium in the engine temperature control circuit until the first temperature reaches the set start-up temperature. The operating power of the PTC heating unit is controlled based on the difference between the first temperature and the set start-up temperature; the smaller the difference, the lower the operating power. That is, the power of the PTC heating unit is dynamically changed. As the temperature of the medium in the engine temperature control circuit increases, the power of the PTC heating unit decreases, reducing the power consumption of the PTC heating unit and allowing the battery power to be used for extended driving range as much as possible.

[0067] Further, if Figure 3 As shown, after obtaining the first temperature of the medium in the engine temperature control circuit in step S20, if the first temperature is not less than the set start temperature, step S301 can be executed directly: control the engine to start, and then step S50 can be executed.

[0068] Preferably, after step S60 above, the method further includes:

[0069] S70: Obtain the real-time temperature of the medium in the engine temperature control circuit; if the real-time temperature exceeds the second set temperature threshold, control the PTC heating unit to shut down.

[0070] During normal engine startup and operation, heat is generated, which heats the medium in the engine temperature control circuit. If the real-time temperature of the medium in the engine temperature control circuit exceeds a second set temperature threshold, such as 75°C, the PTC heating unit can be turned off. At this point, the temperature of the medium in the engine temperature control circuit is sufficient to support the heating needs of the battery and the vehicle cabin. Turning off the PTC heating unit further reduces the power consumption of the battery.

[0071] Furthermore, the second set temperature threshold is determined based on the heating demand signal, including:

[0072] If the heating demand signal includes the battery heating signal and the cabin heating signal, then the second set temperature threshold is the first temperature value;

[0073] If the heating demand signal only includes the cabin heating signal, then the second set temperature threshold is the second temperature value;

[0074] If the heating demand signal only includes the battery heating signal, then the second set temperature threshold is the third temperature value;

[0075] Wherein, the first temperature value > the second temperature value > the third temperature value.

[0076] In other words, the conditional temperature for shutting off the PTC heating unit can vary depending on different heating needs. If the heating demand signal indicates a dual heating mode: battery heating plus cabin heating, the required heat is higher, requiring the medium temperature in the engine temperature control circuit to reach a higher value, such as 80°C. If the heating demand signal only includes battery heating, the heat requirement is the lowest, as the battery reaches its maximum efficiency at 30°C, requiring the medium temperature in the engine temperature control circuit to reach a lower value, such as 50°C. If the heating demand signal only includes cabin heating, the heat requirement is between that of the dual heating mode and battery heating, requiring the medium temperature in the engine temperature control circuit to reach a moderate value, such as 70°C.

[0077] It is understandable that even after the PTC heating unit is turned off, the hybrid vehicle will continue to execute the above steps during operation. This means it will continuously monitor the temperature of the medium in the engine temperature control circuit to determine if it meets the conditions for recycling. If it detects that the conditions are not met, it will repeatedly isolate the engine temperature control circuit and activate the PTC heating unit to heat the medium in the circuit until the recycling conditions are met. It will then continue to determine if the conditions for turning off the PTC heating unit are met. When the temperature of the medium in the engine temperature control circuit meets the conditions for turning off the PTC heating unit, it will shut it off. This process is repeated continuously.

[0078] Preferably, such as Figure 3 As shown, after step S10, if the result of determining whether the vehicle's engine is running is yes, then step S201 is executed:

[0079] S201: Determine whether the engine meets the cold start conditions.

[0080] Based on whether the engine speed exceeds the set speed (e.g., 600 rpm / unit time) and whether the medium temperature in the engine temperature control circuit is greater than a certain temperature threshold (e.g., PTC heating unit outlet medium temperature -5℃), if the conditions are met, the cold start condition is considered to be met; otherwise, the cold start condition is considered not met.

[0081] If the engine meets the cold start conditions, proceed to step S202; otherwise, proceed to step S204.

[0082] S202: Disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit.

[0083] At this time, the temperature of the medium in the engine temperature control circuit is too low to meet the conditions for recycling, and therefore cannot provide thermal support for the battery temperature control circuit and the vehicle compartment temperature control circuit. Therefore, the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit, is cut off, and the engine temperature control circuit is isolated.

[0084] S203: Control the PTC heating unit to turn on, heat the medium in the engine temperature control circuit until the temperature of the medium in the engine temperature control circuit reaches the first set temperature threshold, then connect the engine temperature control circuit with the battery temperature control circuit and / or the engine temperature control circuit with the vehicle cabin temperature control circuit according to the heating demand signal.

[0085] When the temperature of the medium in the engine temperature control circuit reaches the first set temperature threshold, it indicates that the engine temperature control circuit still has residual heat that can be recovered and utilized, supplementing the battery temperature control circuit and / or the vehicle cabin temperature control circuit, while supporting normal engine operation. Therefore, in this case, the engine temperature control circuit is connected to the battery temperature control circuit, and / or the engine temperature control circuit is connected to the vehicle cabin temperature control circuit, based on the heating demand signal.

[0086] S204: Obtain the third temperature of the medium in the engine temperature control circuit.

[0087] The third temperature is directly acquired by the temperature sensor in the engine temperature control circuit.

[0088] S205: If the third temperature is less than the first set temperature threshold, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit. Control the PTC heating unit to turn on, heat the medium in the engine temperature control circuit, and obtain the fourth temperature of the medium in the engine temperature control circuit in real time.

[0089] If the third temperature is less than the first set temperature threshold, it means that the engine temperature control circuit cannot meet the recycling conditions. Therefore, the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit is cut off, the engine temperature control circuit is isolated, and the PTC heating unit is used to prioritize heating the medium in the engine temperature control circuit.

[0090] S206: Determine whether the fourth temperature has reached the first set temperature threshold. If so, proceed to step S60.

[0091] S60: Connect the engine temperature control circuit to the battery temperature control circuit and / or the engine temperature control circuit to the vehicle cabin temperature control circuit according to the heating demand signal.

[0092] In the above scheme, when the engine meets the cold start conditions, it indicates that the temperature of the medium in its temperature control circuit is low, and it should be heated first. If the engine does not meet the cold start conditions, it indicates that the temperature of the medium in its temperature control circuit has at least reached the temperature required for normal start-up. In this case, it is directly determined whether it meets the temperature for recycling. If it does not meet the temperature for recycling, it continues to be heated. If it meets the temperature for recycling, the engine temperature control circuit can be directly connected to the battery temperature control circuit, and / or the engine temperature control circuit to the vehicle compartment temperature control circuit, as needed.

[0093] Preferably, in the above scheme, step S60, which involves connecting the engine temperature control circuit to the battery temperature control circuit and / or the engine temperature control circuit to the vehicle cabin temperature control circuit based on the heating demand signal, further includes:

[0094] S601: Determine the battery heat demand based on the battery heating signal.

[0095] The battery heating signal can include the battery's current temperature and target temperature. The battery's heat demand can be obtained based on the difference between the target temperature and the current temperature.

[0096] S602: Determine the first distribution ratio of the medium in the engine temperature control circuit to the battery temperature control circuit based on the battery heat demand.

[0097] The temperature of the medium in the engine temperature control circuit is already determined, and the temperature of the medium in the battery temperature control circuit can also be determined. Heat exchange occurs between the engine temperature control circuit and the battery temperature control circuit via a heat exchanger. Based on the temperature difference between the mediums in the two temperature control circuits and the expected battery heating time, the proportion of the medium in the engine temperature control circuit that passes through the heat exchanger can be determined, i.e., the first distribution ratio can be determined.

[0098] S603: Determine the cabin heat demand based on the cabin heating signal.

[0099] The cabin heating signal can include the current cabin temperature and the target air conditioning temperature. The cabin heat demand can be obtained based on the difference between the current cabin temperature and the target air conditioning temperature.

[0100] S604: Determine the second distribution ratio of the medium in the engine temperature control circuit to the vehicle compartment temperature control circuit based on the heat demand of the vehicle compartment.

[0101] The temperature of the medium in the engine temperature control circuit is already determined, and the temperature of the medium in the vehicle compartment temperature control circuit can also be determined. Based on the temperature difference between the two temperature control circuits and the expected battery heating time, the proportion of the medium in the engine temperature control circuit entering the vehicle compartment temperature control circuit can be determined, i.e., the second distribution ratio can be determined.

[0102] Depending on the actual application, this solution may include only steps S601 and S602 (corresponding to the case where the heating demand signal only includes the battery heating signal), or only steps S603 and S604 (corresponding to the case where the heating demand signal only includes the cabin heating signal), or simultaneously steps S601-S604 (corresponding to the case where the heating demand signal includes both the battery heating signal and the cabin heating signal).

[0103] Further, if Figure 1As shown, each temperature control circuit includes a water pump. The rotation speeds of the vehicle compartment temperature control circuit water pump B2 and the battery temperature control circuit water pump B3 are determined by the temperature difference between the medium in their respective temperature control circuits and the target temperature, and they operate according to preset control conditions. However, the engine temperature control circuit water pump B1, in addition to meeting the needs of normal engine operation, also needs to provide heat supplementation to the battery temperature control circuit and the vehicle compartment venting circuit. Therefore, the rotation speed of the engine temperature control circuit water pump B1 needs to be adjusted according to a first distribution ratio and a second distribution ratio, i.e., according to the opening degrees of the first solenoid valve Z1 and the second solenoid valve Z2. Specifically, determining the first distribution ratio of the medium in the engine temperature control circuit to the battery temperature control circuit based on the battery heat demand further includes controlling the rotation speed of the engine temperature control circuit water pump according to the first distribution ratio; determining the second distribution ratio of the medium in the engine temperature control circuit to the vehicle compartment temperature control circuit based on the vehicle compartment heat demand further includes controlling the rotation speed of the engine temperature control circuit water pump according to the second distribution ratio. In the above scheme, the control of the engine temperature control water pump can be adjusted in conjunction with its duty cycle at different speeds and the opening degree of the first solenoid valve Z1 and the second solenoid valve Z2. The opening degree of the two solenoid valves is defined as shown in Table 1:

[0104] Table 1 Definition of Solenoid Valve Opening Degree

[0105]

[0106] The speed and duty cycle control of the engine temperature control circuit water pump B1 under different allocation ratios can be determined by experimental calibration. As shown in Table 2, the experimental results are given for the engine temperature control circuit speed / duty cycle and the allocation ratio of the vehicle compartment temperature control circuit and the battery temperature control circuit under the following conditions: the first solenoid valve Z1 operates at a duty cycle of 33.2%, the second solenoid valve Z2 operates at duty cycles of 33.2%, 50%, 51.8%, 66.6%, and 87.2%, respectively, for heating only the vehicle compartment, heating both the vehicle compartment and the battery, and heating only the battery.

[0107] Table 2 Results of the flow distribution test

[0108]

[0109] In practical implementation, calibration tests can be conducted to obtain test results under various conditions. When the hybrid vehicle actually implements the heating control strategy, the distribution ratio of the two temperature control circuits can be determined by looking up a table based on the heat demand of the battery temperature control circuit and the heat demand of the cabin temperature control circuit. The duty cycles of the two solenoid valves and the engine temperature control circuit water pump speed / duty cycle can be deduced from the corresponding engine temperature control circuit water pump speed / duty cycle.

[0110] The relationship between the medium temperature in the engine temperature control circuit, the duty cycle of the engine temperature control circuit, and the flow rate that the engine temperature control circuit needs to supply to the battery temperature control circuit and the vehicle compartment temperature control circuit can also be determined through experimental calibration, as shown in Tables 3 and 4.

[0111] Table 3 shows the correspondence between medium temperature, engine temperature control circuit water pump duty cycle, and required replenishment flow rate when the engine is not running.

[0112]

[0113]

[0114] Table 4 shows the correspondence between medium temperature, engine temperature control circuit water pump duty cycle, and required replenishment flow rate when the engine is running.

[0115]

[0116] In practical implementation, calibration tests can be conducted to obtain test results under various conditions. When the hybrid vehicle actually implements the heating control strategy, in both the engine-started and non-started states, after determining the required supplemental flow rate and the medium temperature of the engine temperature control circuit, the engine temperature control circuit water pump speed / duty cycle can be determined by looking up a table.

[0117] All calibrated tables from each test are stored for future use. The corresponding table is selected for lookup in different scenarios to execute heating control.

[0118] This application also provides a computer-readable storage medium storing program information, wherein a computer reads the program information and executes the steps of the hybrid vehicle heating control method described above.

[0119] This application also provides a computer program product, including a computer program / instructions, characterized in that, when the computer program / instructions are executed by a processor, they implement the steps of the hybrid vehicle heating control method described in any of the above claims.

[0120] This application also provides an electronic device, such as... Figure 4As shown, the electronic device includes at least one processor 41 and at least one memory 42. The memory 42 stores program information, and the processor 41 reads the program information and executes the hybrid vehicle heating control method described in any of the above embodiments. The device may further include an input device 43 and an output device 44. The processor 41, memory 42, input device 43, and output device 44 are communicatively connected. The memory 42, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The processor 41 executes various functional applications and data processing by running the non-volatile software programs, instructions, and modules stored in the memory 42, thereby implementing the hybrid vehicle heating control method provided in any of the above embodiments. The memory 42 may include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the hybrid vehicle heating control method, etc. Furthermore, memory 42 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 42 may optionally include memory remotely located relative to processor 41, and these remote memories may be connected via a network to the apparatus performing the hybrid vehicle heating control method. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof. Input device 43 may receive user clicks and generate signal inputs related to user settings and function control of the hybrid vehicle heating control method. Output device 44 may include a display device such as a display screen. When the one or more modules are stored in memory 42 and are run by the one or more processors 41, the hybrid vehicle heating control method in any of the above method embodiments is executed.

[0121] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0122] The above are merely the principles and preferred embodiments of this application. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this application, and these modifications should also be considered within the scope of protection of this application.

Claims

1. A heating control method for a hybrid vehicle, characterized in that, include: Acquire heating demand signals, including battery heating signals and / or vehicle cabin heating signals; Determine if the vehicle's engine is running; If the engine is not started, the first temperature of the medium in the engine temperature control circuit is obtained; If the first temperature is lower than the set start-up temperature, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit. The PTC heating unit is controlled to start, heating the medium in the engine temperature control circuit until the first temperature reaches the set start temperature, after which the engine is controlled to start. The PTC heating unit continues to heat the medium in the engine temperature control circuit to obtain a second temperature of the medium in the engine temperature control circuit; If the second temperature reaches the first set temperature threshold, then the engine temperature control circuit and the battery temperature control circuit, and / or the engine temperature control circuit and the vehicle cabin temperature control circuit are connected according to the heating demand signal.

2. The hybrid vehicle heating control method according to claim 1, characterized in that, The PTC heating unit is activated to heat the medium in the engine temperature control circuit until the first temperature reaches the set start-up temperature, at which point the engine is started. The operating power of the PTC heating unit is controlled based on the difference between the first temperature and the set start-up temperature; the smaller the difference, the lower the operating power.

3. The hybrid vehicle heating control method according to claim 2, characterized in that, The method further includes: Obtain the real-time temperature of the medium in the engine temperature control circuit; If the real-time temperature exceeds the second set temperature threshold, the PTC heating unit is controlled to shut down.

4. The hybrid vehicle heating control method according to claim 3, characterized in that, If the real-time temperature exceeds the second set temperature threshold, the PTC heating unit is controlled to shut down. The second set temperature threshold is determined based on the heating demand signal, including: If the heating demand signal includes the battery heating signal and the cabin heating signal, then the second set temperature threshold is the first temperature value; If the heating demand signal only includes the cabin heating signal, then the second set temperature threshold is the second temperature value; If the heating demand signal only includes the battery heating signal, then the second set temperature threshold is the third temperature value; Wherein, the first temperature value > the second temperature value > the third temperature value.

5. The hybrid vehicle heating control method according to any one of claims 1-4, characterized in that, After determining whether the vehicle's engine is running, if the engine is running, the method further includes: Determine whether the engine meets the cold start conditions; If the engine meets the cold start conditions, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit. The PTC heating unit is turned on to heat the medium in the engine temperature control circuit until the temperature of the medium in the engine temperature control circuit reaches the first set temperature threshold. Then, the engine temperature control circuit is connected to the battery temperature control circuit and / or the engine temperature control circuit is connected to the vehicle cabin temperature control circuit according to the heating demand signal. Furthermore, if the engine does not meet the cold start conditions, the third temperature of the medium in the engine temperature control circuit is obtained; If the third temperature is less than the first set temperature threshold, then disconnect the connection between the engine temperature control circuit and the battery temperature control circuit, and between the engine temperature control circuit and the vehicle compartment temperature control circuit; control the PTC heating unit to turn on, heat the medium in the engine temperature control circuit and obtain the fourth temperature of the medium in the engine temperature control circuit in real time; If the fourth temperature reaches the first set temperature threshold, then the engine temperature control circuit and the battery temperature control circuit, and / or the engine temperature control circuit and the vehicle cabin temperature control circuit are connected according to the heating demand signal.

6. The hybrid vehicle heating control method according to claim 5, characterized in that, The step of connecting the engine temperature control circuit to the battery temperature control circuit and / or the engine temperature control circuit to the vehicle cabin temperature control circuit according to the heating demand signal further includes: The battery heat requirement is determined based on the battery heating signal. The first distribution ratio of the medium in the engine temperature control circuit to the battery temperature control circuit is determined based on the battery heat demand. And / or, The heat demand of the vehicle cabin is determined based on the cabin heating signal. The second distribution ratio of the medium in the engine temperature control circuit to the vehicle cabin temperature control circuit is determined based on the heat demand of the vehicle cabin.

7. The hybrid vehicle heating control method according to claim 6, characterized in that: The step of determining the first allocation ratio of the medium in the engine temperature control circuit to the battery temperature control circuit according to the battery heat demand further includes: controlling the speed of the water pump in the engine temperature control circuit according to the first allocation ratio. The step of determining the second allocation ratio of the medium in the engine temperature control circuit to the vehicle compartment temperature control circuit based on the heat demand of the vehicle compartment further includes: controlling the speed of the water pump in the engine temperature control circuit according to the second allocation ratio.

8. A computer-readable storage medium, characterized in that, The storage medium stores program information, and after the computer reads the program information, it executes the steps of the hybrid vehicle heating control method according to any one of claims 1-7.

9. A computer program product, characterized in that, The system includes a computer program / instruction, characterized in that, when executed by a processor, the computer program / instruction implements the steps of the hybrid vehicle heating control method according to any one of claims 1-7.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the hybrid vehicle heating control method according to any one of claims 1-7.

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