Automotive thermal management system and method

Abstract

The present application relates to a kind of automobile thermal management system and method, including thermal management controller, electronic water pump, temperature sensor, first electric heating valve, second electric heating valve, PTC, electrically controlled three-way valve, heat exchanger, first flow channel flowing through automobile motor and second flow channel flowing through inverter, the electronic water pump, first electric heating valve, second electric heating valve, electrically controlled three-way valve are all controlled by thermal management controller, temperature sensor is electrically connected with thermal management controller, electronic water pump, first flow channel and second flow channel are respectively communicated with the three valve ports of electrically controlled three-way valve, first electric heating valve and second electric heating valve are used to control PTC and heat exchanger on respectively, provide a kind of in the case where not using multiple valve (5 pass or 6 pass) by electric heating valve realizes the control of multiple loop, to reach the purpose of simplifying module structure, optimization layout.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and more specifically to an automotive thermal management system and method. Background Technology

[0002] With the increasing popularity of new energy vehicles, the general direction of traditional fuel vehicles developing towards new energy vehicles is clear. In new energy vehicles, the temperature control of the drive motor, electronic control (including inverters, etc.), and battery directly affects the vehicle's range and power performance.

[0003] The thermal management system (cooling control system) is connected to the cooling / heating medium supply device, allowing the cooling / heating medium to circulate within the thermal management system through pipelines, thereby removing heat from the motor, electronic control (including inverters, etc.), and battery, or heating the aforementioned components to help them reach a suitable operating temperature more quickly.

[0004] To achieve these goals, different manufacturers employ different strategies. The general industry trend is to increase the complexity of the circuit. For example, there are now 5 / 6-way valves on the market, and even 8 / 9-way valves or valves with more channels.

[0005] However, the increasing number of valve channels increases the difficulty of valve manufacturing and the complexity of control. At the same time, different controllers are required for controlling valves and electric water pumps, which also increases manufacturing costs. Summary of the Invention

[0006] In summary, to overcome the shortcomings of the prior art, the present invention provides an automotive thermal management system and method that uses an electric thermostatic valve to achieve the purpose of one controller controlling multiple actuators, reducing the use of control chips and optimizing the layout.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automotive thermal management system, comprising a thermal management controller, an electronic water pump, a temperature sensor, a first electric heating valve, a second electric heating valve, a PTC, an electronically controlled three-way valve, a heat exchanger, a first flow channel flowing through an automotive motor, and a second flow channel flowing through an inverter. The electronic water pump, the first electric heating valve, the second electric heating valve, and the electronically controlled three-way valve are all controlled by the thermal management controller. The temperature sensor is electrically connected to the thermal management controller. One end of the first flow channel is connected to the first valve port of the electronically controlled three-way valve, and the other end is connected to the electronic water pump. The inlet end is connected, one end of the second flow channel is connected to the second valve port of the electrically controlled three-way valve, and the other end is connected to the inlet end of the electric water pump. The outlet end of the electric water pump is connected to the third valve port of the electrically controlled three-way valve. The temperature sensor is located at the outlet end of the electric water pump. One end of the first electric heating valve is connected to the outlet end of the electric water pump, and the other end is connected to the PTC. The other end of the PTC is connected to the inlet end of the electric water pump. One end of the second electric heating valve is connected to the first flow channel and / or the second flow channel, and the other end is connected to the heat exchanger. The other end of the heat exchanger is connected to the inlet end of the electric water pump.

[0008] Furthermore, it includes multiple coolant circulation loops, namely a heating loop, a first heat dissipation loop, a second heat dissipation loop, and a third heat dissipation loop. The coolant in the heating loop flows through an electronic water pump, a first electric heating valve, and a PTC. The coolant in the first heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, and a first flow channel. The coolant in the second heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, a first flow channel, and a second flow channel. The coolant in the third heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, a first flow channel and / or a second flow channel, a second electric heating valve, and a heat exchanger.

[0009] Furthermore, when the temperature detected by the temperature sensor corresponding to the heating circuit is lower than the preset value, when the temperature detected by the temperature sensor corresponding to the first heat dissipation circuit is higher than the preset value by 20%, when the temperature detected by the temperature sensor corresponding to the second heat dissipation circuit is higher than the preset value by 40%, and when the temperature detected by the temperature sensor corresponding to the third heat dissipation circuit is higher than the preset value by 50%.

[0010] Furthermore, both the first and second electric heating valves include paraffin wax and a heating wire.

[0011] A method for automotive thermal management includes the aforementioned automotive thermal management system. When the temperature detected by the temperature sensor is lower than a preset value, an electronic water pump and a first electric heating valve are activated, and a second electric heating valve is closed, allowing coolant to flow into the PTC circuit. The PTC is then activated to heat the coolant circuit, rapidly raising the temperature of the automotive thermal management system. When the temperature detected by the temperature sensor matches the preset value, the electronic water pump is shut off, and coolant flow ceases. When the temperature detected by the temperature sensor is 20% higher than the preset value, cooling of the automotive motor is required. The electronic water pump is activated, the first and second electric heating valves are closed, and an electronically controlled three-way valve is activated to connect the electronic water pump. The first flow channel cools the car motor. When the temperature detected by the temperature sensor is 40% higher than the preset value, the car motor and inverter need to be cooled simultaneously. The electric water pump is started, the first and second electric heating valves are closed, and the electronically controlled three-way valve is started to open the electric water pump, the first flow channel, and the second flow channel to cool the car motor and inverter. When the temperature detected by the temperature sensor is 50% higher than the preset value, the electric water pump is started, the first electric heating valve is closed, and the second electric heating valve and the electronically controlled three-way valve are started to open the electric water pump, the first flow channel, the second flow channel, and the heat exchanger to cool the car motor and inverter while also cooling through the heat exchanger.

[0012] Compared with existing technologies, the automotive thermal management system of the present invention controls the electronic water pump, the electronically controlled three-way valve, the first electric heating valve, and the second electric heating valve all by the same thermal management controller, reducing the use of control chips and lowering costs. Through the first electric heating valve and the second electric heating valve, multi-loop control is achieved without using multi-way valves (5-way or 6-way), thereby simplifying the module structure and optimizing the layout.

[0013] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples. Attached Figure Description

[0014] Figure 1 This is a control flowchart of an embodiment of the present invention; Figure 2 This is a schematic diagram of the heating circuit according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the first heat dissipation circuit according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the second heat dissipation circuit according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the third heat dissipation circuit according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a thermal management system according to an embodiment of the present invention. Detailed Implementation

[0015] The specific embodiments of the automotive thermal management system and method of the present invention are further described below with reference to the accompanying drawings. The automotive thermal management system and method of the present invention are not limited to the descriptions in the following embodiments.

[0016] like Figure 1 , 6 As shown, an automotive thermal management system includes a thermal management controller, an electric water pump, a temperature sensor, a first electric heating valve, a second electric heating valve, a PTC (Power Transmitter), an electrically controlled three-way valve, a heat exchanger, a first flow channel passing through an automotive motor, and a second flow channel passing through an inverter. The electric water pump, the first electric heating valve, the second electric heating valve, and the electrically controlled three-way valve are all controlled by the thermal management controller. The temperature sensor is electrically connected to the thermal management controller. One end of the first flow channel is connected to the first valve port of the electrically controlled three-way valve, and the other end is connected to the inlet end of the electric water pump. The second flow channel... One end of the channel is connected to the second valve port of the electrically controlled three-way valve, and the other end is connected to the inlet end of the electric water pump. The outlet end of the electric water pump is connected to the third valve port of the electrically controlled three-way valve. The temperature sensor is located at the outlet end of the electric water pump. One end of the first electric heating valve is connected to the outlet end of the electric water pump, and the other end is connected to the PTC. The other end of the PTC is connected to the inlet end of the electric water pump. One end of the second electric heating valve is connected to the first flow channel and / or the second flow channel, and the other end is connected to the heat exchanger. The other end of the heat exchanger is connected to the inlet end of the electric water pump.

[0017] The thermal management controller is a centrally integrated controller that centrally controls the electrical components within the system. The electric water pump is a centrifugal electric water pump consisting of a drive motor and an impeller. The temperature sensor is used to detect the real-time temperature of the system's water circuit, providing a basis for the thermal management controller's control. The first electric heating valve is electrically controlled and, during heating, can conduct the coolant in the heating circuit to the PTC (Positive Temperature Coefficient) heating device. The electrically controlled three-way valve is a three-way valve controlled by a PWM electrical signal, including a motor and a valve, realizing the switching and closing of different paths. The automotive motor is the power source that transmits power to the vehicle through a reduction mechanism. The inverter (electrically controlled) converts the DC power from the chemical battery into AC power to drive the automotive motor. The second electric heating valve is electrically controlled and, during heating, can conduct the coolant in the third heat dissipation circuit to the heat exchanger.

[0018] Furthermore, such as Figure 2-5 As shown, it includes multiple coolant circulation loops, namely a heating loop, a first heat dissipation loop, a second heat dissipation loop, and a third heat dissipation loop. The coolant in the heating loop flows through an electronic water pump, a first electric heating valve, and a PTC. The coolant in the first heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, and a first flow channel. The coolant in the second heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, a first flow channel, and a second flow channel. The coolant in the third heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, a first flow channel and / or a second flow channel, a second electric heating valve, and a heat exchanger.

[0019] The heating circuit is designed for low-temperature conditions. When the system coolant is at a low temperature, the electric water pump and the first electric heating valve are activated, the second electric heating valve is closed, the coolant path to the PTC is opened, and the PTC is activated to heat the coolant circuit. The coolant circulation circuit is: electric water pump → first electric heating valve → PTC → electric water pump, which enables the car motor and inverter to quickly reach a suitable operating temperature.

[0020] The system does not work when the system coolant is at room temperature.

[0021] The first heat dissipation circuit corresponds to a higher temperature state. When the system coolant is at a higher temperature, it is necessary to cool the car motor. The electric water pump is started, the first and second electric heating valves are closed, and the electronically controlled three-way valve is started to open the first flow channel to dissipate heat from the car motor. The coolant circulation circuit is: electric water pump → electronically controlled three-way valve → first flow channel (car motor cooling) → electric water pump.

[0022] The second cooling circuit corresponds to high-temperature conditions. When the system coolant is at a high temperature, it is necessary to cool the car motor and inverter simultaneously. The electric water pump is started, the first and second electric heating valves are closed, and the electronically controlled three-way valve is started to open the first and second flow channels, so that the car motor and inverter can dissipate heat. The coolant circulation circuit is: electric water pump → electronically controlled three-way valve → first and second flow channels (car motor and inverter heat dissipation) → electric water pump.

[0023] The third heat dissipation circuit corresponds to ultra-high temperature conditions. When the system coolant is at an ultra-high temperature, the coolant is insufficient to cool the car motor and inverter. The electronic water pump is started, the first electric heating valve is closed, and the second electric heating valve is started to open the heat exchanger to dissipate the system's heat through the heat exchanger. The coolant circulation circuit is as follows: electronic water pump → electronically controlled three-way valve → first flow channel and second flow channel (heat dissipation of car motor and inverter) → second electric heating valve → heat exchanger → electronic water pump.

[0024] Furthermore, when the temperature detected by the temperature sensor corresponding to the heating circuit is lower than the preset value, when the temperature detected by the temperature sensor corresponding to the first heat dissipation circuit is higher than the preset value by 20%, when the temperature detected by the temperature sensor corresponding to the second heat dissipation circuit is higher than the preset value by 40%, and when the temperature detected by the temperature sensor corresponding to the third heat dissipation circuit is higher than the preset value by 50%.

[0025] Furthermore, both the first and second electric heating valves include paraffin wax and a heating wire. When the heating wire is not heated, the valve is closed; when the heating wire is heated, the paraffin wax melts, its volume increases, and it pushes the valve open.

[0026] A method for automotive thermal management includes the aforementioned automotive thermal management system. When the temperature detected by the temperature sensor is lower than a preset value, an electronic water pump and a first electric heating valve are activated, and a second electric heating valve is closed, allowing coolant to flow into the PTC circuit. The PTC is then activated to heat the coolant circuit, rapidly raising the temperature of the automotive thermal management system. When the temperature detected by the temperature sensor matches the preset value, the electronic water pump is shut off, and coolant flow ceases. When the temperature detected by the temperature sensor is 20% higher than the preset value, cooling of the automotive motor is required. The electronic water pump is activated, the first and second electric heating valves are closed, and an electronically controlled three-way valve is activated to connect the electronic water pump. The first flow channel cools the car motor. When the temperature detected by the temperature sensor is 40% higher than the preset value, the car motor and inverter need to be cooled simultaneously. The electric water pump is started, the first and second electric heating valves are closed, and the electronically controlled three-way valve is started to open the electric water pump, the first flow channel, and the second flow channel to cool the car motor and inverter. When the temperature detected by the temperature sensor is 50% higher than the preset value, the electric water pump is started, the first electric heating valve is closed, and the second electric heating valve and the electronically controlled three-way valve are started to open the electric water pump, the first flow channel, the second flow channel, and the heat exchanger to cool the car motor and inverter while also cooling through the heat exchanger.

[0027] The temperature sensor directly monitors the temperature of the coolant. The coolant flows through the first and second channels. Since the first and second channels are used to cool the car motor and inverter, the temperature is connected to the drive motor and inverter through heat conduction. Monitoring the temperature of the coolant is equivalent to monitoring the temperature of the car motor and inverter.

[0028] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0029] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An automotive thermal management system, comprising a thermal management controller, characterized in that: It also includes an electronic water pump, a temperature sensor, a first electric heating valve, a second electric heating valve, a PTC, an electrically controlled three-way valve, a heat exchanger, a first flow channel flowing through the automotive motor, and a second flow channel flowing through the inverter. The electronic water pump, the first electric heating valve, the second electric heating valve, and the electrically controlled three-way valve are all controlled by a thermal management controller. The temperature sensor is electrically connected to the thermal management controller. One end of the first flow channel is connected to the first valve port of the electrically controlled three-way valve, and the other end is connected to the inlet end of the electronic water pump. One end of the second flow channel is connected to the second valve port of the electrically controlled three-way valve, and the other end is connected to the inlet end of the electronic water pump. The outlet end of the electronic water pump is connected to the third valve port of the electrically controlled three-way valve. The temperature sensor is located at the outlet end of the electronic water pump. One end of the first electric heating valve is connected to the outlet end of the electronic water pump, and the other end is connected to the PTC. The other end of the PTC is connected to the inlet end of the electronic water pump. One end of the second electric heating valve is connected to the first flow channel and / or the second flow channel, and the other end is connected to the heat exchanger. The other end of the heat exchanger is connected to the inlet end of the electronic water pump.

2. The automotive thermal management system according to claim 1, characterized in that: It includes multiple coolant circulation loops, namely a heating loop, a first heat dissipation loop, a second heat dissipation loop, and a third heat dissipation loop. The coolant in the heating loop flows through an electronic water pump, a first electric heating valve, and a PTC. The coolant in the first heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, and a first flow channel. The coolant in the second heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, a first flow channel, and a second flow channel. The coolant in the third heat dissipation loop flows through an electronic water pump, an electrically controlled three-way valve, a first flow channel and / or a second flow channel, a second electric heating valve, and a heat exchanger.

3. The automotive thermal management system according to claim 2, characterized in that: When the temperature detected by the temperature sensor corresponding to the heating circuit is lower than the preset value, the electronic water pump and the first electric heating valve are started, the second electric heating valve is closed, the passage from the coolant to the PTC is opened, and the PTC is started to heat the coolant circuit. When the temperature detected by the temperature sensor corresponding to the first heat dissipation circuit is higher than the preset value by 20%, the car motor is cooled, the electronic water pump is started, the first and second electric heating valves are closed, and the electronically controlled three-way valve is started to open the first flow channel to dissipate heat from the car motor. When the temperature detected by the temperature sensor corresponding to the second heat dissipation circuit is higher than the preset value by 40%, the car motor and inverter are cooled simultaneously, the electronic water pump is started, the first and second electric heating valves are closed, and the electronically controlled three-way valve is started to open the first and second flow channels to dissipate heat from the car motor and inverter. When the temperature detected by the temperature sensor corresponding to the third heat dissipation circuit is higher than the preset value by 50%, the electronic water pump is started, the first electric heating valve is closed, and the second electric heating valve is started to open the heat exchanger to dissipate the system's heat through the heat exchanger.

4. A vehicle thermal management system according to any one of claims 1-3, characterized in that: Both the first and second electric heating valves include paraffin wax and heating wire.

5. A method for automotive thermal management, characterized in that: Including the automotive thermal management system according to any one of claims 1-4, when the temperature detected by the temperature sensor is lower than a preset value, the electronic water pump and the first electric heating valve are activated, the second electric heating valve is closed, allowing coolant to flow into the PTC circuit, and the PTC is activated to heat the coolant circuit, causing the automotive thermal management system to heat up rapidly. When the temperature detected by the temperature sensor matches the preset value, the electronic water pump is turned off, and the coolant stops flowing. When the temperature detected by the temperature sensor is 20% higher than the preset value, cooling of the automotive motor is required, the electronic water pump is activated, the first and second electric heating valves are closed, and the electronically controlled three-way valve is activated to connect the electronic water pump. The first flow channel cools the car motor. When the temperature detected by the temperature sensor is 40% higher than the preset value, the car motor and inverter need to be cooled simultaneously. The electric water pump is started, the first and second electric heating valves are closed, and the electronically controlled three-way valve is started to open the electric water pump, the first flow channel, and the second flow channel to cool the car motor and inverter. When the temperature detected by the temperature sensor is 50% higher than the preset value, the electric water pump is started, the first electric heating valve is closed, and the second electric heating valve and the electronically controlled three-way valve are started to open the electric water pump, the first flow channel, the second flow channel, and the heat exchanger to cool the car motor and inverter while also cooling through the heat exchanger.

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