Thermal management architecture and control method for life water tank of extended-range new-energy motor home

Abstract

The invention relates to the field of whole vehicle control of new energy vehicles, in particular to a heat management framework and a control method for a life water tank of an extended-range new energy motor home, the extended-range new energy motor home serves as a representative of a current advanced motor home, the life water tank is innovatively placed in a whole vehicle heat management system, waste heat utilization of the whole vehicle is achieved, and energy resources are saved. The living water tank is unfrozen at the limiting temperature, laying of additional equipment pipelines is reduced, the space of a living bin is not occupied, energy of the whole vehicle is considered, the electricity burden of the whole vehicle is reduced, the vehicle using cost is reduced, and energy conservation and emission reduction are achieved; according to different vehicle using scenes, a user sets a domestic water system (intelligent heating / forced unfreezing) in an MP5 motor home mode, a vehicle VCU performs complete vehicle heat management full analysis according to user selection, unfreezes and heats a domestic water tank, normal water using and vehicle using experience of the user is guaranteed, and a series of problems about water using of the domestic water tank of a motor home at the present stage are solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle whole vehicle control, and in particular to a thermal management architecture and control method for a domestic water tank of an extended-range new energy RV. Background Art

[0002] With the current national policy promoting new energy vehicles, the outdoor camping and self-driving tourism economy has boomed, and new energy commercial RVs are attracting widespread attention. New energy extended-range hybrid RVs offer the advantages of pure electric vehicles, such as low noise, fast acceleration, and low maintenance costs. They also eliminate the need for charging stations and range anxiety, making them a popular choice among RV users.

[0003] In the RV market, most dealers rely on their experience with gasoline-powered vehicles, performing renovations on stock vehicles. The domestic water tank, a crucial water source for RVs, is often installed separately and not integrated into the vehicle's thermal management system. In winter, low temperatures can cause the domestic water to freeze, making it unusable and causing inconvenience for customers, impacting their comfort. Traditionally, retrofitting diesel heaters or auxiliary heating systems has been used. However, these additions can easily lead to wiring problems in electrical equipment, potentially causing fires. This also poses significant energy consumption risks and increases vehicle operating costs.

[0004] In summary, a thermal management architecture and control method for a domestic water tank of an extended-range new energy RV are proposed to solve the problems raised in the above background technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a thermal management architecture and control method for the domestic water tank of an extended-range new energy RV. The domestic water tank is placed in the thermal management system of the entire vehicle, thereby realizing the utilization of waste heat of the entire vehicle, thawing the domestic water tank at extreme temperatures, reducing the laying of external equipment pipelines, not occupying the living compartment space, taking into account the energy of the entire vehicle, reducing the electricity burden of the entire vehicle, reducing the cost of using the vehicle, and saving energy and reducing emissions. According to different vehicle usage scenarios, users set the "domestic water system (intelligent heating / forced defrosting)" in the MP5 "RV mode", and the vehicle VCU conducts a full analysis of the thermal management of the entire vehicle according to the user's selection, defrosts and heats the domestic water tank, and ensures the user's normal water use and vehicle experience.

[0006] A control method for a domestic water tank of a range-extended new energy RV, the specific steps are as follows: Step S10, setting the ambient temperature threshold to T1, the domestic water tank temperature threshold to T2, the ambient temperature is below T1 or the domestic water tank temperature is below T2 at this time, the vehicle is powered on normally, and the vehicle is in READY state; Step S20: In the MP5, select "RV Mode" to enter the "Domestic Water System" interface. If the vehicle is in driving mode, select "Smart Heating Mode" and proceed to step S30. If the vehicle is parked, select "Forced Thaw Mode" and proceed to step S40. Step S30: In the "intelligent heating mode", the VCU detects whether the range extender is started. If so, step S31 is executed; otherwise, step S33 is executed. Step S31: The range extender is started. The threshold of the range extender engine water temperature is set to T3. When the range extender engine water temperature is ≥ T3, the VCU controls the normally closed water valve to open. The VCU controls the valve port between the electrically driven high-voltage component of the electronic three-way valve and the domestic water tank to close, and the valve port to the second radiator to open. Step S32, VCU detects whether the temperature of the domestic water tank is ≥ T2, if so, stops working, otherwise continues to execute step S31; Step S33: The VCU keeps the normally closed water valve closed and sets the water temperature thresholds of the electric drive system to T4 and T5 respectively; Step S34: During driving, when the water temperature of the electric drive system is ≥ T4, the VCU controls the valve port of the electronic three-way valve between the electrically driven high-voltage component and the domestic water tank to open, and the valve port to the second radiator to close, thereby controlling the operation of the second electronic water pump. Step S35, the VCU detects whether the water temperature of the electric drive system is ≥ T5, if not, executes step S34, if yes, executes step S36; Step S36: The VCU controls the valve opening between the electrically driven high-voltage component of the electronic three-way valve and the domestic water tank to be P1, and the valve opening to the second radiator to be 1-P1; Step S37, VCU detects whether the temperature of the domestic water tank is ≥ T2, if so, stops working, otherwise continues to step S34; Step S40, in the "forced defrost mode", the VCU detects whether the range extender is started, if so, executes step S41, if not, keeps the normally closed water valve closed; Step S41, the range extender is started, the threshold of the range extender engine water temperature is set to T6, when the range extender engine water temperature ≥ T6, the VCU controls the normally closed water valve (18) to open, controls the electronic three-way valve to electrically drive the valve port between the high-voltage component and the domestic water tank to close, and opens the valve port to the second radiator; Step S42, VCU detects whether the temperature of the domestic water tank (1) is ≥ T2, if so, stops working, if not, continues to execute step S41; Step S43, in the "forced thawing mode", the VCU controls the water heater (21) to work and controls the second electronic water pump to work, and step S43 and step S40 are in a simultaneous working state; Step S44: The threshold of the power battery SOC is S1. The VCU detects whether the power battery SOC is ≤ S1. If so, the VCU controls the water heater to not work, and forces the range extender to start, and executes step S41. If not, the VCU detects whether the domestic water tank temperature is ≥ T2. If so, it stops working. If not, it continues to execute step S43.

[0007] It is further defined that a thermal management architecture of a domestic water tank of an extended-range new energy RV includes an expansion water tank, a coolant drive component, a heat source component, a domestic water tank and a heat dissipation component. The expansion water tank and the heat source component are connected by a water pipe, the heat source component and the coolant drive component are connected by a water pipe, the coolant drive component and the domestic water tank are connected by a water pipe, and the heat dissipation component is installed on the pipeline between the heat source component and the domestic water tank. It also includes an ambient temperature sensor, and the ambient temperature sensor, the coolant drive component, the heat source component, the heat dissipation component and the controller VCU are connected.

[0008] It is further defined that the expansion water tank includes a first expansion water tank and a second expansion water tank, the coolant drive component includes a first electronic water pump, a second electronic water pump and an engine water pump, one end of the second electronic water pump is connected to the second expansion water tank, and the other end is connected to the heating component, the first electronic water pump and the engine water pump are both connected to the first expansion water tank at one end, and the other end is connected to the coolant drive component and the heat source component.

[0009] It is further defined that the heat source components are respectively an electric drive high-voltage component, a water heater and a range extender engine, the electric drive high-voltage component is connected to the second electronic water pump, the water heater (21) is connected to the first electronic water pump, the range extender engine is connected to the engine water pump, and the heat dissipation component includes a first radiator and a second radiator.

[0010] It is further defined that a second water temperature sensor and an electronic three-way valve are provided on the pipeline between the electrically driven high-voltage component and the domestic water tank, the first end of the electronic three-way valve is connected to the electrically driven high-voltage component, the second end is connected to the domestic water tank, and the third end is connected to the second radiator, a third water temperature sensor is provided in the domestic water tank, a second one-way valve is provided on the pipeline between the domestic water tank and the second electronic water pump, and a first one-way valve is provided on the pipeline between the domestic water tank and the second electronic water pump.

[0011] It is further defined that a first water temperature sensor and a normally closed water valve are provided on the pipeline between the range extender engine and the domestic water tank, one end of the first radiator is connected to the engine water pump, and the other end is connected to the range extender engine.

[0012] The beneficial effects of the present invention compared to the current technology are: The present invention innovatively places the domestic water tank into the thermal management system of the entire vehicle, realizing the utilization of waste heat of the entire vehicle, thawing the domestic water tank at extreme temperatures, reducing the laying of external equipment pipelines, not occupying the living compartment space, taking into account the energy of the entire vehicle, reducing the electricity burden of the entire vehicle, reducing the cost of using the vehicle, and saving energy and reducing emissions; according to different vehicle usage scenarios, users set the "domestic water system (intelligent heating / forced defrosting)" in the MP5 "RV mode", and the vehicle VCU conducts a full analysis of the thermal management of the entire vehicle according to the user's selection, defrosts and heats the domestic water tank, and ensures the user's normal water use and vehicle experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall thermal management architecture of the present invention; Figure 2 This is a diagram of the thermal management architecture for thawing and heating the raw and live water tanks of the high-voltage drive system of the present invention; Figure 3 This is a diagram of the thermal management architecture for thawing and heating the live and live water tanks of the range extender engine of the present invention; Figure 4 This is a diagram of the thermal management architecture of the water heater of the present invention for thawing and heating the domestic water tank; Figure 5 This is a logic control diagram of the control method of the present invention.

[0014] The markings in the figure correspond to: 1-domestic water tank, 2-ambient temperature sensor, 3-first expansion water tank, 4-second expansion water tank, 5-first electronic water pump, 6-second electronic water pump, 7-engine water pump, 8-electrically driven high-voltage components, 9-range extended engine, 10-heater, 11-first radiator, 12-second radiator, 13-second water temperature sensor, 14-electronic three-way valve, 15-third water temperature sensor, 16-second one-way valve, 17-first water temperature sensor, 18-normally closed water valve, 19-thermostat, 20-first one-way valve, 21-water heater. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. Example 1

[0016] like Figure 1-Figure 5As shown, a thermal management architecture of a domestic water tank of a range-extended new energy RV includes an expansion water tank, a coolant drive component, a heat source component, a domestic water tank 1, a heat dissipation component and an ambient temperature sensor 2. The expansion water tank includes a first expansion water tank 3 and a second expansion water tank 4. The coolant drive component includes a first electronic water pump 5, a second electronic water pump 6 and an engine water pump 7. The heat source components are respectively an electric drive high-voltage component 8, a water heater 21 and a range-extending engine 9. One end of the second electronic water pump 6 is connected to the second expansion water tank 4 through a water pipe, and the other end is connected to the electric drive high-voltage component 8 through a water pipe. One end of the first electronic water pump is connected to the first expansion water tank through a water pipe, and the other end is connected to the water heater through a water pipe. The electric drive high-voltage component 8 is connected to the heater 10 through a DC / AC inverter. One end of the engine water pump 7 is connected to the first expansion water tank 3 through a water pipe, and the other end is connected to the range-extending engine 9 is connected by a water pipe, and the heat dissipation component is installed on the pipeline 1 between the heat source component and the domestic water tank. The heat dissipation component includes a first radiator 11 and a second radiator 12. A second water temperature sensor 13 and an electronic three-way valve 14 are provided on the pipeline between the electrically driven high-voltage component 8 and the domestic water tank 1. The first end of the electronic three-way valve 14 is connected to the electrically driven high-voltage component 8, the second end is connected to the domestic water tank 1, and the third end is connected to the second radiator 12. A third water temperature sensor 15 is provided in the domestic water tank 1, and a second one-way valve 16 is provided on the pipeline between the domestic water tank 1 and the second electronic water pump 6. A first water temperature sensor 17 and a normally closed water valve 18 are provided on the pipeline between the range extender engine 9 and the domestic water tank 1. One end of the first radiator 11 is connected to the engine water pump 7, and the other end is connected to the range extender engine 9, and a degassing port is provided on both the first expansion water tank 3 and the second expansion water tank 4.

[0017] The specific principle of the high-voltage drive system for thawing and heating the living water tank thermal management system is that when the water temperature of the second water temperature sensor 13 reaches the first target temperature, the second electronic water pump 6 starts to work, the valve port between the electrically driven high-voltage component 8 of the electronic three-way valve 14 and the domestic water tank 1 is opened, and the valve port to the second radiator 12 is closed, and the flow order of the coolant in the second expansion water tank 4 is: second electronic water pump 6 → electrically driven high-voltage component 8 → second water temperature sensor 13 → electronic three-way valve 14 → domestic water tank 1 → third water temperature sensor 15 → second one-way valve 16→second electronic water pump 6. When the water temperature of the second water temperature sensor 13 reaches the second target temperature, the electronic three-way valve 14 performs proportional adjustment of the valve port, and the second radiator 12 works. Part of the water flows into the second radiator 12 for cooling to prevent the electric drive system from overheating; part of the water continues to defrost and heat the domestic water tank 1. When the temperature of the third water temperature sensor 15 reaches the set target, the valve port between the electrically driven high-voltage component 8 of the electronic three-way valve 14 and the domestic water tank 1 is closed, and the valve port to the second radiator 12 is opened, and the system stops working. Example 2

[0018] During driving, when the power battery is low and the range extender engine 9 is forced to start or the range extender mode is selected, the range extender engine 9 runs at high speed and generates a large amount of heat. When the engine coolant temperature is appropriate, the waste heat generated by the engine is introduced into the domestic water tank, and the water inside the domestic water tank 1 is thawed or heated by heat exchange. The specific working principle is: when the water temperature of the engine water temperature sensor 1 reaches the first target temperature, the normally closed water valve opens, and the flow order of the coolant in the first expansion water tank 3 is: engine water pump 7 → range extender engine 9 → first water temperature sensor 17 → normally closed water valve 18 → domestic water tank 1 → third water temperature sensor 15 → engine water pump 7. When the water temperature of the first water temperature sensor 17 reaches the second target temperature, the thermostat 19 opens, and the first radiator 11 starts working. Part of the engine high-temperature coolant flows into the first radiator 11 for cooling to prevent the engine system from overheating; part continues to thaw, deheat and heat the domestic water tank 1. When the temperature of the third water temperature sensor 15 reaches the set target, the normally closed water valve 18 closes and the system stops working. Example 3

[0019] When the battery is fully charged, the water temperature of the parking and camping or electric drive system does not reach the first target temperature for a long time, and the range extender is not started, the water heater 8 starts to heat the coolant, and introduces the heated coolant into the interior of the domestic water tank 1, and uses heat exchange to thaw or heat the water inside the domestic water tank 1. The flow order of the coolant in the first expansion water tank 3 is: first electronic water pump 5 → water heater 8 → first one-way valve 20 → domestic water tank 1 → third water temperature sensor 15 → first electronic water pump 5. When the temperature of the third water temperature sensor 15 reaches the set target, the system stops working.

[0020] A control method for a thermal management architecture of a domestic water tank of a range-extended new energy RV comprises the following specific steps: Step S10, setting a threshold value of an ambient temperature to T1 and a temperature threshold value of the domestic water tank to T2; when the ambient temperature is below T1 or the temperature of the domestic water tank is below T2, the vehicle is powered on normally and the vehicle is in a READY state; Step S20: In the MP5, select "RV Mode" to enter the "Domestic Water System" interface. If the vehicle is in driving mode, select "Smart Heating Mode" and proceed to step S30. If the vehicle is parked, select "Forced Thaw Mode" and proceed to step S40. Step S30: In the "intelligent heating mode", the VCU detects whether the range extender is started. If so, step S31 is executed; otherwise, step S33 is executed. Step S31: The range extender is started, and the engine water temperature threshold is set to T3. When the engine water temperature is ≥ T3, the VCU controls the normally closed water valve to open. The VCU controls the valve port between the electrically driven high-voltage component 8 and the domestic water tank 1 of the electronic three-way valve to close, and the valve port to the second radiator 12 to open; Step S32, VCU detects whether the temperature of domestic water tank 1 is ≥ T2, if so, stops working, otherwise continues to execute step S31; Step S33: The VCU keeps the normally closed water valve closed and sets the water temperature thresholds of the electric drive system to T4 and T5 respectively; Step S34: During driving, when the water temperature of the electric drive system is ≥ T4, the VCU controls the valve port of the electronic three-way valve 14 between the electric drive high-voltage component 8 and the domestic water tank 1 to open, and the valve port to the second radiator 12 to close, thereby controlling the operation of the second electronic water pump; Step S35, the VCU detects whether the water temperature of the electric drive system is ≥ T5, if not, executes step S34, if yes, executes step S36; Step S36: The VCU controls the valve opening between the electrically driven high-voltage component 8 of the electronic three-way valve and the domestic water tank 1 to be P1, and the valve opening to the second radiator 12 to be 1-P1; Step S37, VCU detects whether the temperature of the domestic water tank is ≥ T2, if so, stops working, otherwise continues to step S34; Step S40, in the "forced defrost mode", the VCU detects whether the range extender is started, if so, executes step S41, if not, keeps the normally closed water valve closed; Step S41, the range extender is started, and the threshold value of the water temperature of the range extender engine 9 is set to T6. When the water temperature of the range extender engine 9 is ≥ T6, the VCU controls the normally closed water valve to open, controls the electronic three-way electric drive high-voltage component (8) to close the valve port between the domestic water tank 1, and opens the valve port to the second radiator 12; Step S42, VCU detects whether the temperature of the domestic water tank 1 is ≥ T2, if so, stops working, otherwise continues to execute step S41; Step S43, in the "forced defrost mode", the VCU controls the water heater 21 to work and controls the second electronic water pump 6 to work. Step S43 and step S40 are in a simultaneous working state; In step S44, the threshold of the power battery SOC is S1. The VCU detects whether the power battery SOC is ≤ S1. If so, the VCU controls the water heater to not work, and forces the range extender to start, and executes step S41. If not, the VCU detects whether the temperature of the domestic water tank 1 is ≥ T2. If so, it stops working. If not, it continues to execute step S43.

[0021] Among them, the present invention integrates a high-voltage DC / AC inverter into the high-voltage system components. When the domestic water tank 1 is thawed or heated to a predetermined water temperature target, the user can use this function independently to reheat the domestic water for domestic use, thereby improving the water quality of the RV. The above is a detailed introduction to the thermal management architecture and control method of the domestic water tank of an extended-range new energy RV provided by the present invention. The description of the specific embodiments is only used to help understand the method and core idea of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the present invention, the present invention can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A control method for a domestic water tank of a range-extended new energy RV, characterized by: The specific steps are as follows: Step S10, setting the threshold of the ambient temperature to T1, the temperature threshold of the domestic water tank (1) to T2, the ambient temperature is below T1 or the temperature of the domestic water tank (1) is below T2 at this time, the vehicle is powered on normally, and the vehicle is in READY state; Step S20: In the MP5, select "RV Mode" to enter the "Domestic Water System" interface. If the vehicle is in driving mode, select "Smart Heating Mode" and proceed to step S30. If the vehicle is parked, select "Forced Thaw Mode" and proceed to step S40. Step S30: In the "intelligent heating mode", the VCU detects whether the range extender is started. If so, step S31 is executed; otherwise, step S33 is executed. Step S31, the range extender is started, the threshold value of the water temperature of the range extender engine (9) is set to T3, when the water temperature of the range extender engine (9) is ≥ T3, the VCU controls the normally closed water valve (18) to open, the VCU controls the valve port between the electrically driven high-voltage component (8) of the electronic three-way valve (14) and the domestic water tank (1) to close, and the valve port to the second radiator (12) to open; Step S32, VCU detects whether the temperature of the domestic water tank (1) is ≥ T2, if so, stops working, if not, continues to execute step S31; Step S33, the VCU keeps the normally closed water valve (18) closed, and sets the thresholds of the water temperature of the electric drive system to T4 and T5 respectively; Step S34, during driving, when the water temperature of the electric drive system is ≥ T4, the VCU controls the valve port between the electric drive high-voltage component (8) and the domestic water tank (1) of the electronic three-way valve (14) to open, and the valve port to the second radiator (12) to close, thereby controlling the operation of the second electronic water pump (6); Step S35, the VCU detects whether the water temperature of the electric drive system is ≥ T5, if not, executes step S34, if yes, executes step S36; Step S36, the VCU controls the valve opening between the electrically driven high-voltage component (8) of the electronic three-way valve (14) and the domestic water tank (1) to be P1, and the valve opening to the second radiator (12) to be 1-P1; Step S37, VCU detects whether the temperature of the domestic water tank (1) is ≥ T2, if so, stops working, if not, continues to execute step S34; Step S40, in the "forced thawing mode", the VCU detects whether the range extender is started, if so, step S41 is executed, if not, the normally closed water valve (18) is kept closed; Step S41, the range extender is started, the threshold value of the water temperature of the range extender engine (9) is set to T6, when the water temperature of the range extender engine (9) is ≥ T6, the VCU controls the normally closed water valve (18) to open, controls the electronic three-way valve (14) to electrically drive the valve port between the high-voltage component (8) and the domestic water tank (1) to close, and opens the valve port to the second radiator (12); Step S42, VCU detects whether the temperature of the domestic water tank (1) is ≥ T2, if so, stops working, if not, continues to execute step S41; Step S43, in the "forced thawing mode", the VCU controls the water heater (21) to work and controls the second electronic water pump (6) to work, and step S43 and step S40 are in a simultaneous working state; In step S44, the threshold value of the power battery SOC is S1, and the VCU detects whether the power battery SOC is ≤ S1. If so, the VCU controls the water heater (21) not to work, and forcibly starts the range extender, and executes step S41. If not, the VCU detects whether the temperature of the domestic water tank is ≥ T2. If so, the VCU stops working. If not, the VCU continues to execute step S43.

2. A thermal management architecture applicable to the control method for the domestic water tank of an extended-range new energy RV according to claim 1, characterized in that: The invention comprises an expansion water tank, a coolant driving component, a heat source component, a domestic water tank (1) and a heat dissipation component, wherein the expansion water tank and the heat source component are connected via a water pipe, the heat source component and the coolant driving component are connected via a water pipe, the coolant driving component and the domestic water tank (1) are connected via a water pipe, and the heat dissipation component is installed on the pipeline between the heat source component and the domestic water tank, and further comprises an ambient temperature sensor (2), wherein the ambient temperature sensor (2), the coolant driving component, the heat source component, the heat dissipation component and the controller VCU are connected.

3. The thermal management architecture of the domestic water tank of a range-extended new energy RV according to claim 2 is characterized by: The expansion water tank includes a first expansion water tank (3) and a second expansion water tank (4); the coolant driving component includes a first electronic water pump (5), a second electronic water pump (6) and an engine water pump (7); one end of the second electronic water pump (6) is connected to the second expansion water tank (4) and the other end is connected to the heating component; the first electronic water pump (5) and the engine water pump (7) are both connected to the first expansion water tank (3) at one end and connected to the coolant driving component and the heat source component at the other end.

4. The thermal management architecture of the domestic water tank of a range-extended new energy RV according to claim 2 is characterized by: The heat source components are respectively an electric drive high-voltage component (8), a water heater (21) and a range-extending engine (9); the electric drive high-voltage component (8) is connected to the second electronic water pump (6); the water heater (21) is connected to the first electronic water pump (5); the range-extending engine (9) is connected to the engine water pump (7); and the heat dissipation component includes a first radiator (11) and a second radiator (12).

5. The thermal management architecture of the domestic water tank of a range-extended new energy RV according to claim 4 is characterized by: A second water temperature sensor (13) and an electronic three-way valve (14) are provided on the pipeline between the electrically driven high-voltage component (8) and the domestic water tank (1); a first end of the electronic three-way valve (14) is connected to the electrically driven high-voltage component (8), a second end is connected to the domestic water tank (1), and a third end is connected to the second radiator (12); a third water temperature sensor (15) is provided in the domestic water tank (1); a second one-way valve (16) is provided on the pipeline between the domestic water tank (1) and the second electronic water pump (6); and a first one-way valve (20) is provided on the pipeline between the domestic water tank (1) and the second electronic water pump (6).

6. The thermal management architecture of the domestic water tank of a range-extended new energy RV according to claim 4 is characterized by: A first water temperature sensor (17) and a normally closed water valve (18) are provided on the pipeline between the range-extending engine (9) and the domestic water tank (1); one end of the first radiator (11) is connected to the engine water pump (7), and the other end is connected to the range-extending engine (9).

Images