A multi-actuator collaborative optimization vehicle thermal management system

Abstract

The present disclosure relates to a multi-actuator cooperative optimization vehicle thermal management system, belonging to the technical field of vehicle thermal management, comprising a WPTC loop, a three-way valve, a cabin loop and a heater water pump, the WPTC loop is the core heat source of the system, and a single WPTC heater is adopted; the WPTC loop comprises a three-way valve arranged at the water inlet end of the WPTC loop, and a PWM control mode is adopted; the WPTC loop, the three-way valve and the heater water pump form a flow cooperative control link, and by adjusting the opening degree of the three-way valve, the system can dynamically and accurately distribute the flow of the heated coolant to the battery loop and the cabin loop, meet the differentiated requirements of battery temperature management and cabin heating under different working conditions, and optimize the system efficiency.

Description

Technical Field

[0001] This disclosure belongs to the field of vehicle thermal management technology, and specifically relates to a vehicle thermal management system with multi-actuator collaborative optimization. Background Technology

[0002] The statements herein provide only background information in relation to this disclosure and do not necessarily constitute prior art.

[0003] New energy vehicles need to balance efficient thermal management of the power battery and cabin comfort in low-temperature environments. Existing technologies generally employ independent circuits for the battery and cabin, or a fixed-ratio heat source distribution design. In terms of hardware architecture, independent WPTC (Positive Temperature Coefficient Thermostat) circuits serve the battery and cabin separately. While this achieves independent temperature control, it requires twice the amount of PTC (Positive Temperature Coefficient) heaters, water pumps, and valve components, leading to increased material costs and space requirements. When using WPTC circuits, the fixed-ratio heat distribution makes it difficult to adapt to the real-time needs of the battery and cabin under dynamic operating conditions, resulting in delayed battery heating or insufficient cabin heating during cold starts. Therefore, existing independent WPTC circuits cannot achieve waste heat sharing, and the fixed-ratio heat distribution mode using shared WPTC circuits leads to conflicting heat distribution and low utilization rates. Utility Model Content

[0004] The purpose of this disclosure is to provide a vehicle thermal management system that is optimized through multi-actuator collaboration, which can at least solve one of the above-mentioned technical problems.

[0005] To achieve the above objectives, this application discloses a multi-actuator collaborative optimization vehicle thermal management system, including a WPTC circuit, a three-way valve, a cabin circuit, and a heater pump; the three-way valve is located at the outlet of the WPTC circuit to achieve branch flow distribution, and the heater pump is controlled by PWM (Pulse Width Modulation) and located at the inlet of the WPTC circuit; an evaporator assembly is also provided on the circuit at the outlet of the WPTC circuit; the WPTC circuit is connected in parallel with the cabin circuit through a heat exchanger.

[0006] Furthermore, the three-way valve and the warm air pump form a flow coordination control link, and the flow distribution ratio of the branch is adjusted by adjusting the opening degree of the three-way valve.

[0007] Furthermore, the evaporator assembly includes a blower and a warm air core, the warm air core being located at the outlet end of the WPTC circuit.

[0008] Furthermore, a temperature sensor for detecting the external environment is installed on the outside of the blower.

[0009] Furthermore, both the inlet and outlet ends of the WPTC circuit are equipped with temperature sensors to detect the heat exchange temperature within the WPTC circuit.

[0010] Furthermore, the temperature sensor at the outlet of the WPTC circuit is positioned close to the heater core.

[0011] Furthermore, a battery pack is installed on the cockpit circuit.

[0012] Furthermore, the outlet end of the battery pack is connected to a heat exchanger, and the inlet end is connected to a battery water pump.

[0013] Furthermore, temperature sensors for detecting battery temperature rise are installed at both the outlet and inlet ends of the battery pack.

[0014] Furthermore, both the warm air pump and the battery pump are equipped with flow meters.

[0015] The beneficial effects of one or more of the above technical solutions are as follows:

[0016] This disclosure establishes a collaborative control link between the WPTC heater on the WPTC circuit and the PWM-controlled warm air pump and three-way valve. By adjusting the opening of the three-way valve, the system can dynamically and accurately distribute the heated coolant flow to the battery circuit and the cabin circuit, meeting the differentiated needs for battery temperature management and cabin heating under different operating conditions and optimizing system efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0018] Figure 1 This is a schematic diagram of the overall structural connection in one or more embodiments of this disclosure.

[0019] In the diagram, 1. WPTC circuit; 2. WPTC heater; 3. Warm air pump; 4. Three-way valve; 5. Cockpit circuit; 6. Battery pack; 7. Blower; 8. Warm air core; 9. Heat exchanger; 10. Battery pump. Detailed Implementation

[0020] like Figure 1 As shown, this embodiment provides a vehicle thermal management system with multi-actuator collaborative optimization, including WPTC circuit 1, three-way valve 4, cabin circuit 5, and heater pump 3.

[0021] Specifically, WPTC loop 1 serves as the core heat source of the system and employs a single WPTC heater 2. WPTC loop 1 includes a three-way valve 4 located at the water inlet of WPTC loop 1. It adopts PWM control and forms a flow coordination control link with WPTC loop 1, three-way valve 4, and warm air pump 3. The flow distribution ratio of the branch is adjusted by regulating the opening degree of the three-way valve 4, which is used to adjust the total coolant flow of the entire WPTC loop 1 to achieve the distribution of branch flow.

[0022] The three-way valve 4 is located at the outlet of the WPTC circuit 1. One of its outlets is connected in parallel with the cabin circuit 5 via a heat exchanger 9. The cabin circuit 5 is equipped with a battery pack 6. The other outlet is connected to the WPTC heater 2, which is located below the warm air pump 3. The warm air pump 3 is PWM controlled and located at the inlet of the WPTC circuit 1 to provide controllable heating power.

[0023] By adjusting the opening degree of the three-way valve 4 (0%-100%), the dynamic flow distribution of the coolant between the battery circuit and the cabin circuit 5 after heating can be achieved.

[0024] An evaporator assembly is also installed on the water outlet of WPTC circuit 1. The evaporator assembly includes a blower 7 and a heater core 8. The heater core 8 is located at the outlet of WPTC circuit 1. Coolant flows through it, and the heat is carried away by the air for cabin heating. The blower 7 drives the air to flow through the heater core 8 and delivers the heat into the cabin.

[0025] Specifically, the high-temperature coolant in WPTC circuit 1 exchanges heat with the cabin circuit 5 through heat exchanger 9, indirectly heating the coolant in cabin circuit 5.

[0026] A temperature sensor is installed on the outside of the blower 7 to monitor changes in the external ambient temperature in real time; a temperature sensor is installed at both the inlet and outlet of the WPTC circuit 1 to detect temperature fluctuations during the heat exchange process inside the circuit; temperature sensors are installed at both the outlet and inlet of the battery pack 6 to accurately track the battery temperature rise and ensure safe operation.

[0027] A temperature sensor at the outlet of WPTC loop 1 is installed near the heater core 8 to monitor fluid temperature changes. The outlet of battery pack 6 is directly connected to heat exchanger 9 for heat exchange; its inlet is connected to battery water pump 10 to ensure coolant circulation. Both heater water pump 3 and battery water pump 10 are equipped with high-precision flow meters to monitor coolant flow in real time.

[0028] The working principle of this utility model:

[0029] A single WPTC heater 2 serves as the core heat source, forming WPTC loop 1. A heater pump 3 (using PWM control) is located at the inlet of WPTC loop 1, driving coolant circulation. A three-way valve 4 is located at the outlet of WPTC loop 1, and its opening (0%-100%, PWM controlled) is dynamically adjustable. One outlet connects to WPTC heater 2 (located below heater pump 3), and the other outlet is connected in parallel to cabin loop 5 via heat exchanger 9. By changing its opening, the three-way valve 4, in conjunction with the total flow provided by heater pump 3, achieves dynamic flow distribution of the heated coolant between the branch flowing to battery pack 6 (indirectly connected via heat exchanger 9) and the branch flowing to cabin heating.

[0030] The high-temperature coolant generated in WPTC circuit 1 flows directly through the heater core 8 (part of the evaporator assembly) located at the circuit outlet. Blower 7 drives air through the heater core 8, carrying away heat from the coolant and delivering it to the cabin for heating. The remaining high-temperature coolant exchanges heat with the cabin circuit 5 via heat exchanger 9, indirectly heating the coolant flowing through the battery pack 6 in the cabin circuit 5 for battery temperature management.

[0031] While the specific embodiments of this disclosure have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this disclosure. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this disclosure are still within the scope of protection of this disclosure.

Claims

1. A vehicle thermal management system with multi-actuator collaborative optimization, characterized in that, It includes a WPTC circuit, a three-way valve, a cabin circuit, and a heater pump; the three-way valve is located at the outlet of the WPTC circuit to distribute the flow of the branch circuit, and the heater pump is controlled by PWM and located at the inlet of the WPTC circuit; an evaporator assembly is also installed on the outlet circuit of the WPTC circuit; the WPTC circuit is connected in parallel with the cabin circuit through a heat exchanger, and a battery pack is installed on the cabin circuit.

2. The vehicle thermal management system with multi-actuator collaborative optimization according to claim 1, characterized in that, The three-way valve and the warm air water pump form a flow coordination control link, and the flow distribution ratio of the branch is adjusted by the opening degree of the three-way valve.

3. The vehicle thermal management system with multi-actuator collaborative optimization according to claim 1, characterized in that, The evaporator assembly includes a blower and a warm air core, the warm air core being located at the outlet end of the WPTC circuit.

4. A vehicle thermal management system with multi-actuator collaborative optimization according to claim 3, characterized in that, A temperature sensor for detecting the external environment is installed on the outside of the blower.

5. A vehicle thermal management system with multi-actuator collaborative optimization according to claim 1, characterized in that, Temperature sensors for detecting the heat exchange temperature within the WPTC circuit are installed at both the inlet and outlet ends of the circuit.

6. A vehicle thermal management system with multi-actuator collaborative optimization according to claim 1, characterized in that, The temperature sensor at the outlet of the WPTC circuit is positioned close to the heater core.

7. A vehicle thermal management system with multi-actuator collaborative optimization according to claim 1, characterized in that, A battery pack is installed on the cockpit circuit.

8. A vehicle thermal management system with multi-actuator collaborative optimization according to claim 7, characterized in that, The battery pack's outlet is connected to a heat exchanger, and its inlet is connected to a battery water pump.

9. A vehicle thermal management system with multi-actuator collaborative optimization according to claim 7, characterized in that, Temperature sensors for detecting battery temperature rise are installed at both the outlet and inlet ends of the battery pack.

10. A vehicle thermal management system with multi-actuator collaborative optimization according to claim 8, characterized in that, Both the warm air water pump and the battery water pump are equipped with flow meters.

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