Temperature control system, method and device for plug-in hybrid electric vehicle

Abstract

The invention provides a temperature control system, method and device for a plug-in hybrid electric vehicle, and relates to the technical field of vehicle control, the temperature control system comprises an engine waste heat collection module, an integrated temperature control module, a cabin and a motor battery, the integrated temperature control module is used for monitoring the temperature of the cabin and the motor battery and driving mode information of the plug-in hybrid electric vehicle, the control module is used for switching the heating mode of the target vehicle according to the driving mode information and controlling the opening and closing states of the multi-way valve according to the temperatures of the cabin and the motor battery so as to regulate and control the temperatures of the cabin and the motor battery; the engine waste heat collection module comprises a transmitter, an exhaust pipe and a heater, and is used for carrying out waste heat recovery treatment on an engine and the exhaust pipe when the plug-in hybrid electric vehicle is in a hybrid mode, and carrying out heat collection treatment on the heater when the plug-in hybrid electric vehicle is in a pure electric mode; the temperature control efficiency and the energy utilization efficiency of the plug-in hybrid electric vehicle can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and in particular to a temperature control system, method and device for a plug-in hybrid electric vehicle. Background Art

[0002] Hybrid vehicles, which combine the characteristics of traditional fuel vehicles with the advantages of pure electric vehicles, have broad development prospects and market potential. However, when hybrid vehicles are driving in a cold environment, the energy efficiency of their motor batteries will drop significantly. At present, relevant technologies have proposed that electric heaters can be used to provide a rapid heating effect on the cockpit, thereby achieving cockpit temperature control, but electric heaters will consume battery energy, and electric heaters consume a lot of electricity in cold weather, which may result in reduced cruising range. In addition, a heat pump system can be used to circulate refrigerant to achieve heating and cooling of the motor battery. Although the heat pump system has high energy efficiency, its efficiency will drop significantly in low temperature environments, thereby affecting the heating effect. At the same time, the system is also relatively complex and costly. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a temperature control system, method and device for a plug-in hybrid electric vehicle, which can significantly improve the temperature control efficiency and energy utilization efficiency of the plug-in hybrid electric vehicle.

[0004] In a first aspect, an embodiment of the present invention provides a temperature control system for a plug-in hybrid electric vehicle, the system comprising: an engine residual heat collection module, an integrated temperature control module, a cabin and a motor battery, the integrated temperature control module being connected to the engine residual heat collection module, the cabin and the motor battery respectively; wherein the integrated temperature control module is used to monitor the temperatures of the cabin and the motor battery and the driving mode information of the plug-in hybrid electric vehicle, so as to switch a target vehicle heating mode according to the driving mode information, and to control the opening and closing states of a multi-way valve according to the temperatures of the cabin and the motor battery, so as to perform temperature control processing on the cabin and the motor battery, wherein the target vehicle heating mode comprises: a residual heat heating mode and a heater heating mode; the engine residual heat collection module comprises: a transmitter, an exhaust pipe and a heater, and the engine residual heat collection module is used to perform residual heat recovery processing on the engine and the exhaust pipe when the plug-in hybrid electric vehicle is in a hybrid mode, and to perform heat collection processing on the heater when the plug-in hybrid electric vehicle is in a pure electric mode.

[0005] In one embodiment, the integrated temperature control module includes: an air conditioning subsystem and a valve control subsystem, and the air conditioning subsystem and the valve control subsystem are connected; wherein the air conditioning subsystem includes: an air flow circuit and a liquid circuit, the air flow circuit is used to transfer heat to the cabin, and the liquid circuit is used to transfer heat to the motor battery; the valve control subsystem is used to distribute heat to the high-temperature gas flowing into the air flow circuit and the high-temperature liquid flowing into the liquid circuit by dynamically adjusting the opening and closing degree of the valve.

[0006] In one embodiment, the valve control subsystem includes: a valve controller, a gas multi-way valve, a liquid multi-way valve and an evaporator, the valve controller is connected to the gas multi-way valve and the liquid multi-way valve respectively, and the evaporator is connected to the gas multi-way valve and the liquid multi-way valve respectively; wherein the valve controller is used to generate valve control instructions according to the cabin temperature and the motor battery temperature, and dynamically adjust the valve opening and closing degree of the gas multi-way valve and the liquid multi-way valve by sending the valve control instructions to the gas multi-way valve and the liquid multi-way valve; the evaporator is used to generate high-temperature gas and low-temperature coolant by performing gas-liquid heat exchange processing on the high-temperature coolant generated by waste heat heating or heater heating, so that the high-temperature gas flows into the air flow circuit to transfer heat to the cabin, and the low-temperature coolant returns to the transmitter to form a closed cycle of the liquid circuit.

[0007] In one embodiment, the engine waste heat collection module also includes: a heat exchanger, and the heat exchanger includes: an electric water pump; wherein the heat exchanger is used to circulate the coolant in the liquid circuit by driving the electric water pump, so that when the target vehicle heating mode is the waste heat heating mode, the waste heat of the engine and the exhaust pipe is collected through the coolant, and when the target vehicle heating mode is the heater heating mode, the heat of the heater is collected through the coolant.

[0008] In a second aspect, an embodiment of the present invention further provides a temperature control method for a plug-in hybrid vehicle, the method being applied to a temperature control system of a plug-in hybrid vehicle as in any one of the first aspects, the method comprising: obtaining vehicle temperature information and vehicle driving mode information of the plug-in hybrid vehicle, wherein the vehicle temperature information comprises: vehicle interior temperature and vehicle exterior temperature, and the vehicle interior temperature comprises: cabin temperature and motor battery temperature; determining a target vehicle heating mode according to the driving mode information, and determining a vehicle heating demand and heat distribution information of the cabin and the motor battery according to the vehicle temperature information and a preset vehicle temperature threshold, wherein the target vehicle heating mode comprises: a waste heat heating mode and a heater heating mode; utilizing the target vehicle heating mode, based on the vehicle heating demand and the heat distribution information, temperature control processing is performed on the plug-in hybrid vehicle, so that the temperatures of the cabin and the motor battery are maintained within the corresponding preset temperature threshold range.

[0009] In one embodiment, the step of determining the target vehicle heating mode according to the driving mode information includes: when the driving mode information is a pure electric driving mode, the target vehicle heating mode is a heater heating mode; when the driving mode information is a hybrid driving mode, the target vehicle heating mode is a waste heat heating mode.

[0010] In one embodiment, the step of determining the vehicle heating demand and the heat distribution information of the cabin and the motor-battery based on the vehicle temperature information and the preset vehicle temperature threshold includes: when it is detected that the temperature of the cabin or the motor-battery is lower than the corresponding preset minimum temperature threshold, determining that the plug-in hybrid vehicle has a heating demand, and obtaining the coolant temperature information of the current heating mode; performing data analysis and processing on the coolant temperature information, the vehicle temperature information and the preset vehicle temperature threshold through a preset data analysis model, determining the opening amount and opening time of the gas multi-way valve corresponding to heating the cabin to within the cabin temperature threshold range, and the opening amount and opening time of the liquid multi-way valve corresponding to heating the motor-battery to within the motor-battery temperature threshold range, and determining the opening amount and opening time of the gas multi-way valve and the opening amount and opening time of the liquid multi-way valve as the heat distribution information.

[0011] In one embodiment, after the step of performing temperature control processing on the plug-in hybrid vehicle, it includes: performing overheat protection processing on the temperature control process, and when the vehicle's external temperature and the temperature difference between the vehicle's internal temperature and the vehicle's external temperature both meet the external circulation conditions, starting the external circulation mode to reduce the temperature inside the vehicle through the air outside the vehicle.

[0012] In one embodiment, the step of performing overheat protection processing on the temperature control process includes: real-time monitoring of the temperature control process, when it is detected that the temperature of the cabin or the motor battery is higher than the corresponding preset safety temperature threshold, turning off the target vehicle heating mode, and generating high-temperature gas by gas-liquid heat exchange processing on the high-temperature coolant, and discharging the high-temperature gas outside the vehicle to perform overheat protection processing on the cabin and the motor battery.

[0013] In a third aspect, an embodiment of the present invention further provides a temperature control device for a plug-in hybrid vehicle, the device being applied to a temperature control system of a plug-in hybrid vehicle as in any one of the first aspects, the device comprising: an information acquisition module, for acquiring vehicle temperature information and vehicle driving mode information of the plug-in hybrid vehicle, wherein the vehicle temperature information comprises: vehicle interior temperature and vehicle exterior temperature, and the vehicle interior temperature comprises: cabin temperature and motor battery temperature; a heat distribution module, for determining a target vehicle heating mode according to the driving mode information, and for determining a vehicle heating demand and heat distribution information of the cabin and the motor battery according to the vehicle temperature information and a preset vehicle temperature threshold, wherein the target vehicle heating mode comprises: a waste heat heating mode and a heater heating mode; a temperature control module, for performing temperature control processing on the plug-in hybrid vehicle based on the vehicle heating demand and the heat distribution information using the target vehicle heating mode, so as to maintain the temperatures of the cabin and the motor battery within the corresponding preset temperature threshold range.

[0014] In a fourth aspect, an embodiment of the present invention further provides an electronic device, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement any one of the methods provided in the second aspect.

[0015] In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement any one of the methods provided in the second aspect.

[0016] The embodiments of the present invention bring the following beneficial effects:

[0017] The embodiment of the present invention provides a temperature control system, method and device for a plug-in hybrid electric vehicle, the system comprising: an engine residual heat collection module, an integrated temperature control module, a cabin and a motor battery, wherein the integrated temperature control module is connected to the engine residual heat collection module, the cabin and the motor battery respectively; wherein the integrated temperature control module is used to monitor the temperature of the cabin and the motor battery and the driving mode information of the plug-in hybrid electric vehicle, so as to switch the target vehicle heating mode according to the driving mode information, and control the opening and closing state of the multi-way valve according to the temperature of the cabin and the motor battery, so as to perform temperature control processing on the cabin and the motor battery, wherein the target vehicle heating mode comprises: a residual heat heating mode and a heater heating mode; the engine The residual heat collection module includes: an engine, an exhaust pipe and a heater. The engine residual heat collection module is used to recover the residual heat of the engine and the exhaust pipe when the plug-in hybrid vehicle is in hybrid mode, and to collect heat from the heater when the plug-in hybrid vehicle is in pure electric mode. The embodiment of the present invention can effectively recover the engine residual heat and the exhaust pipe exhaust gas residual heat through multi-way valve technology. This technology will make maximum use of the original temperature control system on the vehicle without significantly changing the original design architecture, thereby flexibly adjusting the cabin and battery temperature, thereby ensuring the motor battery energy efficiency of the plug-in hybrid vehicle in cold weather, and significantly improving the temperature control efficiency and energy utilization efficiency of the plug-in hybrid vehicle.

[0018] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a temperature control system for a plug-in hybrid electric vehicle provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the specific structure of a temperature control system for a plug-in hybrid electric vehicle provided by an embodiment of the present invention;

[0023] Figure 3 A schematic flow chart of a temperature control method for a plug-in hybrid electric vehicle provided by an embodiment of the present invention;

[0024] Figure 4 A schematic structural diagram of a temperature control device for a plug-in hybrid electric vehicle provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] At present, hybrid vehicles, which combine the characteristics of traditional fuel vehicles with the advantages of pure electric vehicles, have broad development prospects and market potential. However, when hybrid vehicles are driven in a cold environment, the energy efficiency of their batteries and motor batteries will significantly decrease. The relevant technology proposes that the cockpit can be quickly heated by an electric heater to achieve cockpit temperature control, but the electric heater will consume battery energy, and the electric heater consumes a lot of power in cold weather, which may lead to a reduction in driving range. In addition, a heat pump system can be used to circulate refrigerant to achieve heating and cooling of batteries and motor batteries. Although the heat pump system has high energy efficiency, its efficiency will significantly decrease in a low temperature environment, thereby affecting the heating effect. At the same time, the system is also relatively complex and costly. Based on this, the temperature control system, method and device of the plug-in hybrid vehicle provided by the present invention can effectively recover the engine waste heat and the exhaust pipe exhaust waste heat through the multi-way valve technology. This technology will make the most of the temperature control system originally installed on the vehicle, without significantly changing the original design architecture, so as to flexibly adjust the cabin and battery temperature to solve the above-mentioned problems faced by current plug-in hybrid vehicles.

[0028] To facilitate understanding of this embodiment, a temperature control method for a plug-in hybrid vehicle disclosed in an embodiment of the present invention is first described in detail. The method is applied to a temperature control system of a plug-in hybrid vehicle. The system includes: an engine residual heat collection module, an integrated temperature control module, a cockpit, and a motor battery. The integrated temperature control module is connected to the engine residual heat collection module, the cockpit, and the motor battery, respectively. To facilitate understanding of the temperature control system of a plug-in hybrid vehicle, an embodiment of the present invention provides a structural schematic diagram of a temperature control system of a plug-in hybrid vehicle, as shown in FIG. Figure 1 As shown, the integrated temperature control module is used to monitor the temperature of the cabin and the motor battery and the driving mode information of the plug-in hybrid vehicle, so as to switch the target vehicle heating mode according to the driving mode information, and control the opening and closing states of the multi-way valve according to the temperature of the cabin and the motor battery to perform temperature control processing on the cabin and the motor battery, wherein the target vehicle heating mode includes: waste heat heating mode and heater heating mode; the engine waste heat collection module includes: a transmitter, an exhaust pipe and a heater, and the engine waste heat collection module is used to recover waste heat from the engine and the exhaust pipe when the plug-in hybrid vehicle is in hybrid mode, and to collect heat from the heater when the plug-in hybrid vehicle is in pure electric mode.

[0029] That is to say, if the engine is turned on, the waste heat cycle will be carried away from the transmitter by the coolant, and the heat will be heated by the motor battery through the liquid circuit, and then brought to the evaporator and air for heat exchange, generating high-temperature gas, while reducing the coolant temperature. The high-temperature gas can be used to heat the cabin, and the low-temperature coolant returns to the engine and exhaust pipe again, thus forming a liquid cycle. If the transmitter is not turned on, the heater is used to generate heat instead of the transmitter.

[0030] For further information, see Figure 2 A specific structural schematic diagram of a temperature control system of a plug-in hybrid vehicle is shown, wherein the integrated temperature control module includes: an air-conditioning subsystem and a valve control subsystem, the air-conditioning subsystem and the valve control subsystem are connected, the valve control subsystem includes: a valve controller, a gas multi-way valve, a liquid multi-way valve and an evaporator, the valve controller is respectively connected to the gas multi-way valve and the liquid multi-way valve, and the evaporator is respectively connected to the gas multi-way valve and the liquid multi-way valve.

[0031] Specifically, the air conditioning subsystem includes: an air flow loop and a liquid loop, the air flow loop is used to transfer heat to the cabin, and the liquid loop is used to transfer heat to the motor battery; the valve control subsystem is used to distribute heat to the high-temperature gas flowing into the air flow loop and the high-temperature liquid flowing into the liquid loop by dynamically adjusting the opening and closing degree of the valve; the valve controller is used to generate valve control instructions according to the cabin temperature and the motor battery temperature, and dynamically adjust the valve opening and closing degree of the gas multi-way valve and the liquid multi-way valve by sending the valve control instructions to the gas multi-way valve and the liquid multi-way valve; the evaporator is used to generate high-temperature gas and low-temperature coolant by performing gas-liquid heat exchange processing on the high-temperature coolant generated by waste heat heating or heater heating, so that the high-temperature gas flows into the air flow loop to transfer heat to the cabin, and the low-temperature coolant returns to the transmitter to form a closed cycle of the liquid loop.

[0032] based on Figure 1 A schematic diagram of a temperature control system for a plug-in hybrid vehicle is shown in FIG. Figure 2 The specific structural diagram of a temperature control system of a plug-in hybrid vehicle is shown in FIG. 1 , and the temperature control method of a plug-in hybrid vehicle is described in detail in the embodiment of the present invention. Figure 3 The flowchart of a temperature control method for a plug-in hybrid vehicle is shown in FIG. 1 , and the method mainly includes the following steps S302 to S306:

[0033] Step S302 , obtaining vehicle temperature information and vehicle driving mode information of the plug-in hybrid vehicle, wherein the vehicle temperature information includes: vehicle interior temperature and vehicle exterior temperature, and the vehicle interior temperature includes: cabin temperature and motor battery temperature.

[0034] Step S304, determining the target vehicle heating mode according to the driving mode information, and determining the vehicle heating demand and the heat distribution information of the cabin and the motor battery according to the vehicle temperature information and the preset vehicle temperature threshold, wherein the target vehicle heating mode includes: a waste heat heating mode and a heater heating mode. In one embodiment, when the driving mode information is a pure electric driving mode, the target vehicle heating mode is a heater heating mode; when the driving mode information is a hybrid driving mode, the target vehicle heating mode is a waste heat heating mode. In another embodiment, waste heat heating is achieved by collecting the heat generated by the engine and the exhaust pipe, concentrating it in a liquid cooling circulation system, using an evaporator for heat exchange, and high-temperature liquid flows to the motor battery, and high-temperature gas flows to the cabin, while heater heating is the heat generated by the mobile phone heater.

[0035] Step S306, using the target vehicle heating mode, based on the vehicle heating demand and heat distribution information, the plug-in hybrid vehicle is temperature controlled to maintain the temperature of the cabin and the motor battery within the corresponding preset temperature threshold range. In one embodiment, during the temperature control process, the opening and closing state of the multi-way valve can be continuously adjusted according to the actual temperature of the cabin and the battery to ensure the accuracy and economy of the temperature control, and the temperature monitoring data is continuously updated to optimize the heat distribution strategy and improve the intelligence level of the system. In addition, after parking and locking, the system can continue to monitor the temperature and record data to ensure that it can quickly adapt to the external environment at the next start-up to provide passengers with the best riding experience.

[0036] The temperature control method for the plug-in hybrid electric vehicle provided by the embodiment of the present invention can effectively implement heat management of the temperature control device under different working conditions, thereby improving the performance and comfort of the plug-in hybrid electric vehicle.

[0037] The embodiment of the present invention further provides an implementation method for temperature control of a plug-in hybrid vehicle, for details, see (1) to (3) below:

[0038] (1) When it is detected that the temperature of the cabin or the motor battery is lower than the corresponding preset minimum temperature threshold, it is determined that the plug-in hybrid vehicle has a heating demand and the coolant temperature information of the current heating mode is obtained. Specifically, a startup judgment can be made when the vehicle is started to determine whether the cabin and the battery need to be heated. If necessary, waste heat recovery or heater heating is started. That is, when the vehicle is started, the system determines the real-time external temperature. If the external temperature is too high and heating is not required, the temperature control module only serves as an air flow module to perform ventilation or cooling functions. In addition, if the cabin or the motor battery needs to be cooled, a multi-way valve can be used to exchange gas with other temperature control parts.

[0039] (2) Through a preset data analysis model, data analysis and processing are performed on the coolant temperature information, the vehicle temperature information and the preset vehicle temperature threshold to determine the opening amount and opening time of the gas multi-way valve corresponding to heating the cabin to the cabin temperature threshold range, and the opening amount and opening time of the liquid multi-way valve corresponding to heating the motor battery to the motor battery temperature threshold range, and the opening amount and opening time of the gas multi-way valve, as well as the opening amount and opening time of the liquid multi-way valve are determined as heat distribution information. In one embodiment, heat can be distributed to the cabin or the battery heating module through the multi-way valve. If the liquid temperature is too high, the residual heat recovery intensity is reduced. Among them, the motor battery has a higher priority than the cabin, and it is necessary to prioritize ensuring that the battery is in the best working state. In addition, the air that has undergone heat exchange enters the air-conditioning system for circulation. If the temperature is too high, the valve is adjusted to increase the mixing ratio of the original air and discharge the hot air in an appropriate amount. If the temperature is too low, the PTC or heat pump system is used to continue heating the circulating air to ensure passenger comfort and battery performance.

[0040] (3) Perform overheat protection on the temperature control process, and when the vehicle's external temperature and the temperature difference between the vehicle's internal temperature and the vehicle's external temperature meet the external circulation conditions, start the external circulation mode to lower the vehicle's internal temperature through the vehicle's external air. In one embodiment, the temperature control process can be monitored in real time. When it is detected that the temperature of the cabin or the motor battery is higher than the corresponding preset safety temperature threshold, the target vehicle heating mode is turned off, and the high-temperature coolant is subjected to gas-liquid heat exchange to generate high-temperature gas, which is then discharged out of the vehicle to perform overheat protection on the cabin and the motor battery. Specifically, the temperature of the battery and the motor can be continuously monitored. Once it is detected that the temperature is too high, the engine's residual heat recovery is immediately cut off (if the engine is running), and the excess heat is discharged out of the vehicle through gas-liquid exchange. If the battery or cabin does not need to be heated, the heat is exchanged through a multi-way valve and discharged out of the vehicle as exhaust gas. In addition, the excessive residual heat can be reintroduced into the heating module through the multi-way valve to avoid heat waste, and the heat output to the cabin or battery can be adjusted in a timely manner.

[0041] The temperature control method for the plug-in hybrid vehicle provided by the embodiment of the present invention can efficiently and flexibly manage the heat demand of the plug-in hybrid vehicle in different environments and operating conditions, ensure the comfort of passengers and the performance of the battery, optimize energy efficiency and comfort, and improve the overall performance of the vehicle.

[0042] In actual application, if the user is getting ready to go to work in the morning, the basement temperature is 15°C and the outdoor temperature is -10°C, the user drives the car to the highway in pure electric mode, gets off the highway after driving 40 km, and continues to drive 10 km in the city in hybrid mode before parking and locking the car. The specific temperature control process at this time is as follows (1) to (5):

[0043] (1) When the vehicle is started, the system detects the outside temperature, determines the heating demand, and distributes the airflow. Specifically, outside temperature detection: When the vehicle is started, the system detects that the outside temperature is -10°C and the internal temperature is 15°C through an external temperature sensor (such as an NTC thermistor). The system transmits the outside temperature information to the central control unit for real-time data analysis.

[0044] Heating demand judgment: The control unit compares the difference between external and internal temperatures. If the external temperature is lower than the set threshold (for example, 5°C), the system will automatically activate the heating mode to ensure passenger comfort. In addition, the target temperature set by the controller (for example, 22°C) is compared with the actual temperature to determine the degree of heater opening.

[0045] Air flow distribution: When the system starts the heater, liquid coolant (such as ethylene glycol water solution) flows in the heat exchanger, absorbing heat from the heater. The coolant exchanges heat with the air in the heat exchanger and transfers the heat to the air flowing through it. In addition, the heated air can be sent into the cabin through an electric fan to ensure that the temperature in the car gradually increases to reach the set target temperature.

[0046] (2) Heat recovery after the engine is started. When the user is driving in pure electric mode, the battery is powered, the engine is not started, and the system does not recover waste heat. At this time, the battery heating system uses a heat pump or a PTC heater (depending on the actual thermal efficiency of the heat pump and PTC) to keep the battery temperature within a suitable range (usually between 0°C and 40°C).

[0047] (3) When the user switches to hybrid mode and starts the engine, the system immediately starts the engine waste heat recovery function and prepares to collect the waste heat generated by the engine, including heat collection, liquid circulation and heat distribution.

[0048] Heat collection and liquid circulation: First, the engine coolant circulates through the electric water pump to absorb the heat of the engine and exhaust pipe. The coolant flows through the engine cylinder block, cylinder head and exhaust system, and the temperature rises to the set value (usually 80°C to 90°C) to complete the heat collection. After that, the hot coolant flows into the evaporator and exchanges heat with the air flowing through the evaporator through the heat exchange fins. When the air passes through the evaporator, the heat is transferred from the coolant to the air, completing the gas-liquid exchange. Finally, the liquid coolant flows to the heater and returns to the engine after heat exchange, forming a closed cycle.

[0049] Heat distribution: The system uses an electrically or pneumatically controlled multi-way valve to dynamically adjust the opening and closing degree of the valve according to the real-time temperature requirements of the cabin and battery. For example, when the cabin temperature is lower than the set value, the valve opens to the cabin to allow heat to flow in; if the battery needs to be heated, the valve is adjusted to prioritize heat transfer to the battery. In addition, the temperature of the battery and cabin is continuously monitored using multiple temperature sensors (such as PT100) through the temperature control module to ensure timely feedback and adjustment of the heat distribution strategy.

[0050] (4) Monitor the operating status and perform overheat management when the motor battery temperature is too high. Specifically, the system continuously monitors the temperature of the motor battery through multiple temperature sensors (such as NTC thermistors, thermocouples, etc.). Once the temperature exceeds the set value (for example, the battery exceeds 45°C), the control system automatically closes the multi-way valve and stops waste heat recovery to protect the motor battery. At this time, the coolant no longer supplies heat to the cabin or battery. In addition, the overheated coolant discharges excess heat outside the vehicle through the gas-liquid exchange device. The coolant passes through the cooler and flows through the outside air for cooling to ensure that the system temperature returns to a safe range.

[0051] (5) System feedback and adjustment: The system adjusts the opening and closing status of the multi-way valve through the central controller based on real-time temperature data to ensure accurate temperature control of the cabin and battery. The electric motor or servo motor adjusts the multi-way valve in real time to maintain a reasonable distribution of heat to achieve automatic adjustment of the multi-way valve. At the same time, the air-conditioning system automatically selects the internal circulation or external circulation mode according to the temperature difference between the inside and outside of the vehicle. When the outside temperature is suitable, the system will switch to external circulation to lower the temperature inside the vehicle by introducing outside air. When the outside temperature is extremely low (such as -10°C), the system gives priority to internal circulation to keep the temperature inside the vehicle stable.

[0052] In summary, the present invention can solve the problems of low temperature control efficiency, insufficient energy utilization, inflexible temperature regulation, etc. in existing plug-in hybrid vehicles. By introducing a multi-way valve design and a liquid cooling circulation system, efficient recovery and flexible distribution of engine waste heat can be achieved to ensure the optimal temperature state of the cabin and the battery. In addition, the present invention optimizes the heat distribution strategy through intelligent temperature monitoring and feedback mechanism, reduces dependence on electric heaters, and improves energy utilization efficiency. This technical solution improves the comfort and economy of the vehicle and meets the needs of modern energy conservation and environmental protection.

[0053] For the temperature control method of the plug-in hybrid vehicle provided in the above embodiment, an embodiment of the present invention provides a temperature control device of a plug-in hybrid vehicle, which is applied to the temperature control system of the plug-in hybrid vehicle, see Figure 4 The structure diagram of a temperature control device of a plug-in hybrid vehicle is shown in FIG. 1 , and the device includes the following parts:

[0054] The information acquisition module 402 acquires vehicle temperature information and vehicle driving mode information of the plug-in hybrid vehicle, wherein the vehicle temperature information includes: vehicle interior temperature and vehicle exterior temperature, and the vehicle interior temperature includes: cabin temperature and motor battery temperature;

[0055] The heat distribution module 404 determines a target vehicle heating mode according to the driving mode information, and determines a vehicle heating demand and heat distribution information of a cabin and a motor battery according to the vehicle temperature information and a preset vehicle temperature threshold, wherein the target vehicle heating mode includes: a waste heat heating mode and a heater heating mode;

[0056] The temperature control module 406 uses the target vehicle heating mode to perform temperature control processing on the plug-in hybrid vehicle based on the vehicle heating demand and heat distribution information, so as to maintain the temperature of the cabin and the motor battery within the corresponding preset temperature threshold range.

[0057] The temperature control device for the plug-in hybrid electric vehicle provided in the embodiment of the present application can significantly improve the temperature control efficiency and energy utilization efficiency of the plug-in hybrid electric vehicle.

[0058] In one embodiment, when performing the step of determining the target vehicle heating mode according to the driving mode information, the heat distribution module 404 is also used for: when the driving mode information is a pure electric driving mode, the target vehicle heating mode is a heater heating mode; when the driving mode information is a hybrid driving mode, the target vehicle heating mode is a waste heat heating mode.

[0059] In one embodiment, when performing the step of determining the vehicle heating demand and the heat distribution information of the cabin and the motor battery according to the vehicle temperature information and the preset vehicle temperature threshold, the above-mentioned heat distribution module 404 is also used to: when it is detected that the temperature of the cabin or the motor battery is lower than the corresponding preset minimum temperature threshold, determine that the plug-in hybrid vehicle has a heating demand, and obtain the coolant temperature information of the current heating mode; through a preset data analysis model, perform data analysis and processing on the coolant temperature information, the vehicle temperature information and the preset vehicle temperature threshold, determine the opening amount and opening time of the gas multi-way valve corresponding to heating the cabin to within the cabin temperature threshold range, and the opening amount and opening time of the liquid multi-way valve corresponding to heating the motor battery to within the motor battery temperature threshold range, and determine the opening amount and opening time of the gas multi-way valve and the opening amount and opening time of the liquid multi-way valve as the heat distribution information.

[0060] In one embodiment, after performing the step of temperature control processing on the plug-in hybrid vehicle, the temperature control module 406 is further used to: perform overheat protection processing on the temperature control process, and when the vehicle's external temperature and the temperature difference between the vehicle's internal temperature and the vehicle's external temperature meet the external circulation conditions, start the external circulation mode to reduce the temperature inside the vehicle through the air outside the vehicle.

[0061] In one embodiment, when performing the step of performing overheat protection processing on the temperature control process, the above-mentioned temperature control module 406 is also used to: perform real-time monitoring on the temperature control process, and when it is monitored that the temperature of the cabin or the motor battery is higher than the corresponding preset safety temperature threshold, turn off the target vehicle heating mode, and generate high-temperature gas by performing gas-liquid heat exchange processing on the high-temperature coolant, and discharge the high-temperature gas outside the vehicle to perform overheat protection processing on the cabin and the motor battery.

[0062] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0063] An embodiment of the present invention provides an electronic device. Specifically, the electronic device includes a processor and a storage device. The storage device stores a computer program, and when the computer program is executed by the processor, it executes the method described in any one of the above-mentioned implementation methods.

[0064] Figure 5 A structural diagram of an electronic device provided in an embodiment of the present invention, the electronic device 100 includes: a processor 50, a memory 51, a bus 52 and a communication interface 53, wherein the processor 50, the communication interface 53 and the memory 51 are connected via the bus 52; the processor 50 is used to execute an executable module stored in the memory 51, such as a computer program.

[0065] The memory 51 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 53 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0066] The bus 52 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0067] Among them, the memory 51 is used to store programs, and the processor 50 executes the program after receiving the execution instruction. The method executed by the device for flow process definition disclosed in any embodiment of the above-mentioned embodiment of the present invention can be applied to the processor 50 or implemented by the processor 50.

[0068] The processor 50 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 50. The above processor 50 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present invention can be directly embodied as a hardware decoding processor to be executed, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and completes the steps of the above method in combination with its hardware.

[0069] The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the methods described in the previous method embodiments. The specific implementation can be referred to the previous method embodiments, which will not be repeated here.

[0070] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, electronic device, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0071] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A temperature control system for a plug-in hybrid vehicle, characterized in that: The system comprises: an engine residual heat collection module, an integrated temperature control module, a cabin and a motor battery, wherein the integrated temperature control module is connected to the engine residual heat collection module, the cabin and the motor battery respectively; wherein, The integrated temperature control module is used to monitor the temperature of the cabin and the motor battery and the driving mode information of the plug-in hybrid vehicle, so as to switch the target vehicle heating mode according to the driving mode information, and control the opening and closing state of the multi-way valve according to the temperature of the cabin and the motor battery, so as to perform temperature control processing on the cabin and the motor battery, wherein the target vehicle heating mode includes: a waste heat heating mode and a heater heating mode; The engine residual heat collection module includes: an engine, an exhaust pipe and a heater. The engine residual heat collection module is used to recover the residual heat of the engine and the exhaust pipe when the plug-in hybrid vehicle is in a hybrid mode, and to collect heat from the heater when the plug-in hybrid vehicle is in a pure electric mode.

2. The temperature control system for a plug-in hybrid vehicle according to claim 1, characterized in that: The integrated temperature control module includes: an air conditioning subsystem and a valve control subsystem, and the air conditioning subsystem and the valve control subsystem are connected; wherein, The air conditioning subsystem includes: an air flow circuit and a liquid circuit, the air flow circuit is used to transfer heat to the cabin, and the liquid circuit is used to transfer heat to the motor battery; The valve control subsystem is used to distribute heat to the high-temperature gas flowing into the air flow loop and the high-temperature liquid flowing into the liquid loop by dynamically adjusting the opening and closing degree of the valve.

3. The temperature control system for a plug-in hybrid vehicle according to claim 2, characterized in that: The valve control subsystem includes: a valve controller, a gas multi-way valve, a liquid multi-way valve and an evaporator, wherein the valve controller is connected to the gas multi-way valve and the liquid multi-way valve respectively, and the evaporator is connected to the gas multi-way valve and the liquid multi-way valve respectively; wherein, The valve controller is used to generate a valve control instruction according to the cabin temperature and the motor battery temperature, and send the valve control instruction to the gas multi-way valve and the liquid multi-way valve to dynamically adjust the valve opening and closing degree of the gas multi-way valve and the liquid multi-way valve; The evaporator is used to generate high-temperature gas and low-temperature coolant by performing gas-liquid heat exchange processing on the high-temperature coolant generated by heating with waste heat or a heater, so that the high-temperature gas flows into the air flow circuit to transfer heat to the cabin, and the low-temperature coolant returns to the transmitter to form a closed cycle of the liquid circuit.

4. The temperature control system for a plug-in hybrid vehicle according to claim 1, characterized in that: The engine residual heat collection module further includes: a heat exchanger, and the heat exchanger includes: an electric water pump; wherein, The heat exchanger is used to circulate the coolant in the liquid circuit by driving the electric water pump, so that when the heating mode of the target vehicle is the waste heat heating mode, the waste heat of the engine and the exhaust pipe is collected through the coolant, and when the heating mode of the target vehicle is the heater heating mode, the heat of the heater is collected through the coolant.

5. A temperature control method for a plug-in hybrid vehicle, characterized in that: The method is applied to a temperature control system of a plug-in hybrid vehicle according to any one of claims 1 to 4, and the method comprises: Acquiring vehicle temperature information and vehicle driving mode information of the plug-in hybrid vehicle, wherein the vehicle temperature information includes: vehicle interior temperature and vehicle exterior temperature, and the vehicle interior temperature includes: cabin temperature and motor battery temperature; Determine a target vehicle heating mode according to the driving mode information, and determine a vehicle heating demand and heat distribution information of a cabin and a motor battery according to the vehicle temperature information and a preset vehicle temperature threshold, wherein the target vehicle heating mode includes: a waste heat heating mode and a heater heating mode; The target vehicle heating mode is used to perform temperature control on the plug-in hybrid vehicle based on the vehicle heating demand and the heat distribution information, so that the temperatures of the cabin and the motor battery are maintained within corresponding preset temperature threshold ranges.

6. The temperature control method of a plug-in hybrid vehicle according to claim 5, characterized in that: The step of determining the target vehicle heating mode according to the driving mode information comprises: When the driving mode information is a pure electric driving mode, the target vehicle heating mode is the heater heating mode; When the driving mode information is a hybrid driving mode, the target vehicle heating mode is the waste heat heating mode.

7. The temperature control method of a plug-in hybrid vehicle according to claim 5, characterized in that: The step of determining the vehicle heating demand and the heat distribution information of the cabin and the motor battery according to the vehicle temperature information and the preset vehicle temperature threshold comprises: When it is detected that the temperature of the cabin or the motor battery is lower than the corresponding preset minimum temperature threshold, determining that the plug-in hybrid vehicle has a heating demand, and obtaining coolant temperature information of a current heating mode; Through a preset data analysis model, data analysis and processing are performed on the coolant temperature information, the vehicle temperature information and the preset vehicle temperature threshold, and the opening amount and opening time of the gas multi-way valve corresponding to heating the cabin to within the cabin temperature threshold range, as well as the opening amount and opening time of the liquid multi-way valve corresponding to heating the motor battery to within the motor battery temperature threshold range are determined, and the opening amount and opening time of the gas multi-way valve, as well as the opening amount and opening time of the liquid multi-way valve are determined as the heat distribution information.

8. The temperature control method of a plug-in hybrid vehicle according to claim 5, characterized in that: After the step of performing temperature control on the plug-in hybrid vehicle, the method further comprises: Overheat protection is performed on the temperature control process, and when the vehicle's external temperature and the temperature difference between the vehicle's internal temperature and the vehicle's external temperature both meet external circulation conditions, the external circulation mode is turned on to lower the vehicle's internal temperature through the vehicle's external air.

9. The temperature control method of a plug-in hybrid vehicle according to claim 8, characterized in that: The step of performing overheat protection processing on the temperature control process includes: The temperature control process is monitored in real time. When it is detected that the temperature of the cabin or the motor battery is higher than the corresponding preset safety temperature threshold, the heating mode of the target vehicle is turned off, and high-temperature gas is generated by gas-liquid heat exchange processing on the high-temperature coolant. The high-temperature gas is discharged outside the vehicle to protect the cabin and the motor battery from overheating.

10. A temperature control device for a plug-in hybrid vehicle, characterized in that: The device is applied to a temperature control system of a plug-in hybrid vehicle according to any one of claims 1 to 4, and the device comprises: An information acquisition module, which acquires vehicle temperature information and vehicle driving mode information of the plug-in hybrid vehicle, wherein the vehicle temperature information includes: vehicle interior temperature and vehicle exterior temperature, and the vehicle interior temperature includes: cabin temperature and motor battery temperature; a heat distribution module, determining a target vehicle heating mode according to the driving mode information, and determining a vehicle heating demand and heat distribution information of a cabin and a motor battery according to the vehicle temperature information and a preset vehicle temperature threshold, wherein the target vehicle heating mode includes: a waste heat heating mode and a heater heating mode; The temperature control module uses the target vehicle heating mode to perform temperature control on the plug-in hybrid vehicle based on the vehicle heating demand and the heat distribution information, so as to maintain the temperature of the cabin and the motor battery within a corresponding preset temperature threshold range.

11. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the method according to any one of claims 5 to 9.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the method according to any one of claims 5 to 9.

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