Energy storage type heat management system of electric automobile

Abstract

The invention discloses an energy storage type heat management system of an electric vehicle. The vehicle thermal management system comprises a temperature control module, an eight-way valve, an energy storage device and a passenger compartment. The temperature control module is connected with the eight-way valve, the energy storage device and the passenger compartment; the energy storage device is connected with the eight-way valve and the passenger compartment; the temperature control module is used for providing cold / heat energy for the energy storage type heat management system of the electric vehicle; the eight-way valve is used for achieving switching of cold energy and hot energy. Through precise control and adjustment of the eight-way valve, the multiple electromagnetic valves and other valve components, rapid and accurate heat and cold distribution under the complex operation working condition is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle thermal management systems, and more particularly to an energy storage thermal management system for electric vehicles. Background Art

[0002] The increasing popularity of new energy electric vehicles has alleviated environmental pollution, fossil energy shortages and other problems; in order to solve the problem of mileage attenuation in winter and ensure the efficient operation of new energy electric vehicles, heat pump systems are widely used; and CO2 has become one of the ideal alternative refrigerants due to its environmental friendliness and excellent low-temperature heating capacity, and transcritical CO2 heat pump systems have gradually been applied to automotive thermal management systems. However, the huge pressure difference before and after throttling in conventional transcritical CO2 heat pump systems leads to low system efficiency and a large amount of energy loss; using an ejector instead of a throttle valve can recover expansion work and improve system performance; in addition, the existing electric vehicle thermal management system architecture requires a variety of samples and complex pipelines, and the degree of integration is low. Therefore, designing an electric vehicle energy storage thermal management system, using an eight-way valve to achieve the switching of heat and cold, improving the degree of integration of the thermal management system of new energy electric vehicles, and meeting the heating and cooling needs of the vehicle through precise regulation of the eight-way valve are problems that technicians in this field urgently need to solve. Summary of the invention

[0003] In view of this, the present invention provides an electric vehicle energy storage thermal management system, which can improve the integration level of the thermal management system of new energy electric vehicles and achieve the effect of meeting the heating and cooling needs of the vehicle through precise regulation of the eight-way valve.

[0004] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: an electric vehicle energy storage type thermal management system, comprising: a temperature control module, an eight-way valve, an energy storage device and a passenger compartment;

[0005] The temperature control module is connected to the eight-way valve, the energy storage device and the passenger compartment; the energy storage device is connected to the eight-way valve and the passenger compartment;

[0006] The temperature control module is used to provide cold / hot energy for the electric vehicle energy storage thermal management system; the eight-way valve is used to realize the switching of cold / hot energy.

[0007] Preferably, the temperature control module comprises: a compressor, a power unit, an ejector, a regenerator, an outdoor heat exchanger, an expansion valve, a three-way valve, a liquid storage tank and a solenoid valve group;

[0008] The compressor is connected to the eight-way valve and the regenerator respectively;

[0009] The eight-way valve is respectively connected to the passenger compartment, the power unit, the ejector, the regenerator, the liquid storage tank and the energy storage device;

[0010] The power unit is respectively connected with a three-way valve and an injector;

[0011] The regenerator is respectively connected with an ejector, an outdoor heat exchanger, an expansion valve and a liquid storage tank;

[0012] The three-way valve is connected to the power unit, the outdoor heat exchanger and the expansion valve respectively;

[0013] The outdoor heat exchanger is respectively connected to the energy storage device, the ejector, the expansion valve and the regenerator.

[0014] Preferably, the eight-way valve is used to meet the heating and cooling needs of the vehicle; the eight-way valve is provided with eight ports, namely port A, port B, port C, port D, port E, port F, port G and port H; the switching of cold / hot energy is achieved by adjusting the closing of the ports,

[0015] Preferably, the liquid storage tank is used to store CO2 and perform gas-liquid separation on CO2.

[0016] Preferably, the energy storage device includes an energy storage tank, and the energy storage tank is used to recover, store and reuse the heat energy generated by the temperature control module.

[0017] Preferably, the electric vehicle energy storage thermal management system includes four working modes: winter preheating mode, winter heating mode, spring and autumn heat dissipation mode, and summer cooling mode.

[0018] Preferably, it also includes an electric vehicle energy storage thermal management method of the electric vehicle energy storage thermal management system, which adopts an eight-way valve to achieve fast and accurate heat and cold distribution under complex working conditions, and adds an energy storage device to recover, store and reuse the heat energy generated by the power unit and motor and electronic control components during the operation of the electric vehicle.

[0019] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses an energy storage thermal management system for electric vehicles. The present invention solves the problem that the conventional transcritical CO2 injector system has a single operating mode and cannot meet the demand for functional diversity of the thermal management system in actual vehicle operation through the combined switching of multiple modes. Through the precise control and adjustment of valve components such as eight-way valves, three-way valves and multiple solenoid valves, fast and accurate heat and cold distribution under complex operating conditions is achieved. The heat energy generated by the power unit, motor and other electronic control components during the operation of the electric vehicle is recovered, stored and reused through the energy storage tank, thereby ensuring the stable operation of the thermal management system of the electric vehicle and improving the thermal efficiency of the system operation, effectively saving the energy of the electric vehicle, increasing the cruising range of the electric vehicle, and improving the comfort of the passenger compartment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 A schematic diagram of an electric vehicle energy storage thermal management system provided by the present invention;

[0022] Figure 2 A schematic diagram of a winter preheating mode provided by the present invention;

[0023] Figure 3 A schematic diagram of a winter heating mode provided by the present invention;

[0024] Figure 4 A schematic diagram of the heat dissipation mode in spring and autumn provided by the present invention;

[0025] Figure 5 A schematic diagram of a summer cooling mode provided by the present invention;

[0026] In the figure, 1, compressor; 2, eight-way valve; 3, passenger compartment; 4, power unit; 5, ejector; 6, regenerator; 7, outdoor heat exchanger; 8, energy storage tank; 9, expansion valve; 10, three-way valve; 11, liquid storage tank; ak, solenoid valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0028] The embodiment of the present invention discloses an electric vehicle energy storage type thermal management system, comprising: a temperature control module, an eight-way valve 2, an energy storage device and a passenger compartment 3;

[0029] The temperature control module is connected to the eight-way valve 2, the energy storage device and the passenger compartment 3; the energy storage device is connected to the eight-way valve 2 and the passenger compartment 3;

[0030] The temperature control module is used to provide cold / hot energy for the electric vehicle energy storage thermal management system; the eight-way valve 2 is used to realize the switching of cold / hot energy.

[0031] Specifically, Figure 1As shown, the temperature control module includes: a compressor 1, a power unit 4, an ejector 5, a regenerator 6, an outdoor heat exchanger 7, an expansion valve 9, a three-way valve 10, a liquid storage tank 11 and a solenoid valve group;

[0032] The compressor 1 is connected to the eight-way valve 2 and the regenerator 6 respectively;

[0033] The eight-way valve 2 is respectively connected to the passenger compartment 3, the power unit 4, the ejector 5, the regenerator 6, the liquid storage tank 11 and the energy storage device;

[0034] The power unit 4 is respectively connected to a three-way valve 10 and an injector 5;

[0035] The regenerator 6 is respectively connected to an ejector 5, an outdoor heat exchanger 7, an expansion valve 9 and a liquid storage tank 11;

[0036] The three-way valve 10 is connected to the power unit 4, the outdoor heat exchanger 7 and the expansion valve 9 respectively;

[0037] The outdoor heat exchanger 7 is connected to the energy storage device, the ejector 5, the expansion valve 9 and the regenerator 6 respectively.

[0038] Furthermore, the compressor 1 in the embodiment of the present invention is powered by a battery in the electric vehicle.

[0039] Specifically, the eight-way valve 2 is used to meet the heating and cooling needs of the vehicle; the eight-way valve 2 is provided with eight ports, namely port A, port B, port C, port D, port E, port F, port G and port H; the switching of cold / hot energy is achieved by adjusting the closing of the ports;

[0040] Specifically, the liquid storage tank 11 is used to store CO 2 and perform gas-liquid separation on CO 2 .

[0041] Furthermore, the CO2 in the embodiment of the present invention is generated by an ejector.

[0042] Specifically, the energy storage device includes an energy storage tank 8, and the energy storage tank 8 is used to recover, store and reuse the heat energy generated by the temperature control module.

[0043] Specifically, the electric vehicle energy storage thermal management system includes four working modes: winter preheating mode, winter heating mode, spring and autumn heat dissipation mode, and summer cooling mode.

[0044] The solenoid valve group in the embodiment of the present invention specifically includes: solenoid valve a, solenoid valve b, solenoid valve c, solenoid valve d, solenoid valve e, solenoid valve f, solenoid valve g, solenoid valve h, solenoid valve i, solenoid valve j and solenoid valve k;

[0045] A solenoid valve a is provided on the line between the regenerator 6 and the outdoor heat exchanger 7;

[0046] A solenoid valve k is provided on the line between the regenerator 6 and the expansion valve 9;

[0047] A solenoid valve j is provided on the line between the liquid storage tank 11 and the expansion valve 9;

[0048] The line between the ejector 5 and the outdoor heat exchanger 7 is provided with a solenoid valve h and a solenoid valve b in sequence;

[0049] A solenoid valve f is provided on the line between the ejector 5 and the regenerator 6;

[0050] The line between the injector 5 and the port G of the eight-way valve 2 is provided with a solenoid valve g and a solenoid valve c in sequence;

[0051] The line between the injector 5 and the port F of the eight-way valve 2 is provided with a solenoid valve h and a solenoid valve e in sequence;

[0052] The line between the injector 5 and the passenger compartment 3 is provided with a solenoid valve h and a solenoid valve i in sequence;

[0053] A solenoid valve d is provided on the line between the passenger compartment 3 and the port F of the eight-way valve 2 .

[0054] The working mode of the electric vehicle energy storage thermal management system of the present invention is as follows:

[0055] like Figure 2 As shown, in the winter preheating mode, open the solenoid valve f, the solenoid valve g, the solenoid valve h, the solenoid valve i, and the solenoid valve j; close the solenoid valve a, the solenoid valve b, the solenoid valve c, the solenoid valve d, the solenoid valve e, and the solenoid valve k; open the port A of the three-way valve 10 and the port C of the three-way valve 10, and close the port B of the three-way valve 10; the high-temperature and high-pressure CO2 fluid compressed by the compressor 1 passes through the eight-way valve port D and the eight-way valve port F in sequence, flows through the power unit 4, heats the power unit 4, and then passes through the eight-way valve port E, the eight-way valve port C and the regenerator 6 as the mainstream fluid Enter the ejector 5; the liquid CO2 in the liquid storage tank 11 flows through the expansion valve 9 to expand and reduce the pressure, and then passes through the three-way valve port A and the three-way valve port C in turn to enter the outdoor heat exchanger 7. The cooled CO2 fluid then passes through the energy storage tank 8, the eight-way valve port B, and the eight-way valve port H, and is injected into the ejector 5 as a secondary flow fluid through the mainstream fluid. The mixed CO2 flows into the liquid storage tank 11 through the eight-way valve port A and the eight-way valve port G and is separated into gas and liquid. The liquid CO2 is stored in the liquid storage tank 11, and the gaseous CO2 enters the regenerator 6, and enters the compressor 1 after heat recovery to carry out the next cycle.

[0056] like Figure 3As shown, in the winter heating mode, the solenoid valves b, c, d, f, h and k are opened, and the solenoid valves a, e, g, i and j are closed; the three-way valve port A and the three-way valve port B are opened, and the three-way valve port C is closed; the high-temperature and high-pressure CO2 fluid compressed by the compressor (1) passes through the eight-way valve port C and the eight-way valve port E in sequence, flows through the passenger compartment (3), heats the passenger compartment (3), and then passes through the eight-way valve port H, the eight-way valve port B and the regenerator (6). The CO2 flowing through the regenerator 6 then enters the expansion valve (9) and the ejector (5) respectively, and enters the expansion valve The CO2 fluid in (9) is expanded and depressurized, and then passes through the three-way valve port A and the three-way valve port B, flows through the power unit (4), absorbs the heat generated by the power unit (4), and then enters the ejector (5) as a secondary flow fluid; the CO2 fluid entering the ejector (5) from the regenerator (6) is used as the mainstream fluid, and the secondary flow fluid is drawn and sucked in. After mixing, it passes through the outdoor heat exchanger (7), the energy storage tank (8), the eight-way valve port A, and the eight-way valve port G in turn to enter the liquid storage tank (11) and perform gas-liquid separation, the liquid CO2 is stored in the liquid storage tank (11), the gaseous CO2 enters the regenerator (6), and after heat recovery, enters the compressor (1) to perform the next cycle.

[0057] like Figure 4 As shown, in the spring and autumn heat dissipation mode, open solenoid valve a, solenoid valve c, solenoid valve e, solenoid valve f, solenoid valve h, solenoid valve j, and close solenoid valve b, solenoid valve d, solenoid valve g, solenoid valve i, and solenoid valve k; open three-way valve port A and three-way valve port B, and close three-way valve port C; the high-temperature and high-pressure CO2 fluid compressed by the compressor (1) passes through the eight-way valve port A, the eight-way valve port G, and the energy storage tank 8 in sequence, and enters the outdoor heat exchanger 7 for condensation and cooling. The cooled CO2 fluid flows through the regenerator 6 to The mainstream fluid enters the ejector 5; the liquid CO2 in the liquid storage tank 11 flows through the expansion valve 9 to expand and reduce the pressure, and then passes through the three-way valve port A and the three-way valve port B, flows through the power unit 4, absorbs the heat generated by the power unit 4, and then as the secondary flow fluid, it is injected into the ejector 5 through the mainstream fluid. After mixing, it passes through the eight-way valve port C and the eight-way valve port E in turn to enter the liquid storage tank 11 for gas-liquid separation. The liquid CO2 is stored in the liquid storage tank 11, and the gaseous CO2 enters the regenerator 6, and after heat recovery, it enters the compressor 1 to carry out the next cycle.

[0058] like Figure 5As shown, in the summer cooling mode, open solenoid valve a, solenoid valve c, solenoid valve d, solenoid valve f, solenoid valve h, solenoid valve i, solenoid valve k, and close solenoid valve b, solenoid valve e, solenoid valve g, and solenoid valve j; open three-way valve port A and three-way valve port B, and close three-way valve port C; the high-temperature and high-pressure CO2 fluid compressed by the compressor 1 passes through the eight-way valve port A, the eight-way valve port G, and the energy storage tank 8 in sequence, and enters the outdoor heat exchanger 7 for condensation and cooling. The cooled CO2 fluid flows through the regenerator 6, enters the expansion valve 9 and the ejector 5, and the CO2 fluid entering the expansion valve 9 passes through the After expansion and pressure reduction, it passes through the three-way valve port A and the three-way valve port B, flows through the power unit 4, absorbs the heat generated by the power unit 4, and then enters the ejector 5 as a secondary flow fluid through the mainstream fluid; the CO2 fluid entering the ejector 5 from the regenerator 6 is used as the mainstream fluid, and the secondary flow fluid is sucked in and then flows through the passenger compartment 3 after mixing, absorbs the heat of the passenger compartment 3, and then enters the liquid storage tank 11 through the eight-way valve port C and the eight-way valve port E in turn for gas-liquid separation, and the liquid CO2 is stored in the liquid storage tank 11, and the gaseous CO2 enters the regenerator 6, and enters the compressor 1 after heat recovery to carry out the next cycle.

[0059] It can be seen from the above scheme that the present invention solves the problem that the conventional transcritical CO2 injector system has a single operating mode and cannot meet the demand for diverse functions of the thermal management system in actual vehicle operation through the combined switching of multiple modes. Through the precise control and adjustment of valve components such as eight-way valves, three-way valves and multiple solenoid valves, fast and accurate heat and cold distribution under complex operating conditions is achieved, and the heat energy generated by the power unit, motor and other electronic control components during the operation of the electric vehicle is recovered, stored and reused through the energy storage tank, thereby ensuring the stable operation of the thermal management system of the electric vehicle and improving the thermal efficiency of the system operation, effectively saving the energy of the electric vehicle, increasing the cruising range of the electric vehicle, and improving the comfort of the passenger cabin.

[0060] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0061] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric vehicle energy storage thermal management system, characterized in that: include: A temperature control module, an eight-way valve (2), an energy storage device and a passenger compartment (3); The temperature control module is connected to the eight-way valve (2), the energy storage device and the passenger compartment (3); the energy storage device is connected to the eight-way valve (2) and the passenger compartment (3); The temperature control module is used to provide cold / hot energy for the electric vehicle energy storage type thermal management system; the eight-way valve (2) is used to realize the switching of cold / hot energy.

2. The electric vehicle energy storage thermal management system according to claim 1, characterized in that: The temperature control module comprises: a compressor (1), a power unit (4), an ejector (5), a heat regenerator (6), an outdoor heat exchanger (7), an expansion valve (9), a three-way valve (10), a liquid storage tank (11) and a solenoid valve group; The compressor (1) is connected to the eight-way valve (2) and the regenerator (6) respectively; The eight-way valve (2) is respectively connected to the passenger compartment (3), the power unit (4), the ejector (5), the regenerator (6), the liquid storage tank (11) and the energy storage device; The power unit (4) is respectively connected to a three-way valve (10) and an injector (5); The regenerator (6) is respectively connected to an ejector (5), an outdoor heat exchanger (7), an expansion valve (9) and a liquid storage tank (11); The three-way valve (10) is respectively connected to the power unit (4), the outdoor heat exchanger (7) and the expansion valve (9); The outdoor heat exchanger (7) is respectively connected to the energy storage device, the ejector (5), the expansion valve (9) and the regenerator (6).

3. The electric vehicle energy storage thermal management system according to claim 2, characterized in that: The eight-way valve (2) is used to meet the heating and cooling needs of the vehicle; the eight-way valve (2) is provided with eight ports, namely port A, port B, port C, port D, port E, port F, port G and port H; the switching of cold / hot energy is achieved by adjusting the closing of the ports.

4. The electric vehicle energy storage thermal management system according to claim 1, characterized in that: The liquid storage tank (11) is used to store CO2 and perform gas-liquid separation on the CO2.

5. The electric vehicle energy storage thermal management system according to claim 1, characterized in that: The energy storage device comprises an energy storage tank (8), and the energy storage tank (8) is used to recover, store and reuse the heat energy generated by the temperature control module.

6. The electric vehicle energy storage thermal management system according to claim 1, characterized in that: The electric vehicle energy storage thermal management system includes four working modes: winter preheating mode, winter heating mode, spring and autumn heat dissipation mode, and summer cooling mode.

7. An electric vehicle energy storage thermal management method applied to an electric vehicle energy storage thermal management system according to claims 1-6, characterized in that: An eight-way valve (2) is used to achieve rapid and accurate heat and cold distribution under complex working conditions, and an energy storage device is added to recover, store and reuse heat energy generated by a power unit (4) and motor and electronic control components during the operation of the electric vehicle.

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