Thermal management control system and method for new energy electric vehicle

Abstract

The present invention relates to an integrated thermal management control system for a new energy electric vehicle, comprising a cooling water system and an air conditioning refrigeration system, the cooling water system comprising a first cooling water circuit portion having a first circuit in which cooling water passes through a battery cooling device and an evaporator of the air conditioning refrigeration system, a second cooling water circuit portion having a second circuit in which cooling water passes through an electric drive device, a third cooling water circuit portion having a third circuit in which cooling water passes through a radiator provided with a fan, a fourth cooling water circuit portion having a fourth circuit in which cooling water passes through a condenser of the air conditioning refrigeration system, wherein the integrated thermal management control system comprises an integrated control valve block for selectively fluidly connecting the first circuit, the second circuit, the third circuit and the fourth circuit to realize a cooling water circuit operating in an intended thermal management mode, the control valve block comprising at least one control valve in the form of a multi-way valve. The present invention also relates to a thermal management control method performed using the system.

Description

Technical Field

[0001] This invention relates to the field of new energy electric vehicle technology, and more specifically to a thermal management control system and thermal management control method for new energy electric vehicles. Background Technology

[0002] With the gradual popularization of new energy electric vehicles, range anxiety has become one of the bottlenecks restricting their development. Traditional electric vehicle thermal management consists of multiple thermal management systems: the electric drive unit has its own independent thermal management system; the battery unit has its own independent thermal management system controlled by the battery management system (BMS); and the air conditioning system (cooling and heating) each has its own independent thermal management system. While this mode of multiple independent thermal management systems is relatively easy to implement, there is no coordination between the systems, resulting in direct or indirect energy waste and a decrease in the overall energy efficiency of the vehicle. Furthermore, these independent thermal management systems result in an extremely large number of components in the vehicle's thermal management system, occupying a significant amount of installation space, and making the control system extremely complex, with very low reliability and flexibility. Summary of the Invention

[0003] The purpose of this invention is to solve at least one of the above-mentioned problems and / or other problems existing in the prior art.

[0004] Based on this, this application proposes an integrated thermal management control system for new energy electric vehicles based on a cooling water circuit module. Through the integrated design of the cooling water circuit and the integrated design of the control valve, the air conditioning refrigeration system, the electric drive motor cooling circuit, the battery cooling circuit, and the passenger compartment heating supply circuit are combined. At the same time, the on and off of each circuit is effectively coordinated and controlled to achieve efficient and coordinated use of energy, improve the electric vehicle's range, save electrical and thermal energy, reduce manufacturing costs, and save installation space.

[0005] To achieve the above objectives, according to one aspect of the present invention, an integrated thermal management control system for a new energy electric vehicle is provided, comprising a cooling water system and an air conditioning system. The cooling water system includes a first cooling water circuit portion having a first pipe through an evaporator of a battery cooling device and an air conditioning system; a second cooling water circuit portion having a second pipe through an electric drive device; a third cooling water circuit portion having a third pipe through a radiator equipped with a fan; and a fourth cooling water circuit portion having a fourth pipe through a condenser of the air conditioning system. The integrated thermal management control system is characterized by comprising a monolithic control valve block configured to selectively fluidly connect the first, second, third, and fourth pipes to achieve operation of the cooling water circuit under a desired thermal management mode. The monolithic control valve block includes at least one control valve in the form of a multi-way valve.

[0006] The integrated thermal management control system according to the present invention uses a control valve block as a control hub to connect the required cooling water circuit modules in an integrated manner, so as to realize the overall management and coordinated utilization of thermal energy, improve the system compactness and overall system energy efficiency, and make the control simple, flexible and reliable.

[0007] According to one embodiment of the present invention, the control valve block includes a first control valve in the form of a multi-way valve and a second control valve in the form of a multi-way valve. The first control valve is configured to switch between multiple valve positions to control the on / off state, or the connection or isolation between a first cooling water circuit section, a second cooling water circuit section, and a third cooling water circuit section. The second control valve is configured to switch between multiple valve positions to control the on / off state, or the connection or isolation between a third cooling water circuit section and a fourth cooling water circuit section. A first end of a third pipeline is connected to a first valve port of the first control valve, a second end of the third pipeline is connected to a first valve port of the second control valve, and a second valve port of the first control valve is fluidly connected to a second valve port of the second control valve. Thus, through the integrated design of the two control valves, multiple combination possibilities for the cooling water circuit module are provided.

[0008] According to one embodiment of the present invention, the first end of the second pipeline is connected to the third valve port of the first control valve, the second end of the second pipeline is connected to the first port of the four-way pipe, the first end of the third pipeline is connected to the second port of the four-way pipe, and the third port of the four-way pipe is connected to the first valve port of the first control valve.

[0009] According to one embodiment of the present invention, the first end of the first pipeline is connected to the fourth valve port of the first control valve, the second end of the first pipeline is connected to the fifth valve port of the first control valve, the first end of the fourth pipeline is connected to the third valve port of the second control valve, and the second end of the fourth pipeline is connected to the fourth valve port of the second control valve.

[0010] According to one embodiment of the present invention, a three-way valve is provided in the fourth pipeline. The first port of the three-way valve is connected to the condenser, the second port of the three-way valve is connected to the fourth valve port of the second control valve, and the third port of the three-way valve is connected to the fourth port of the four-way pipe.

[0011] According to one embodiment of the present invention, the cooling water system includes a fifth cooling water circuit section having a fifth pipe through which cooling water passes a PTC (Positive Temperature Coefficient) heater. A first end of the fifth pipe is connected to a first port of a tee pipe, a second port of the tee pipe is connected to a second port of a tee valve, and a third port of the tee pipe is connected to a fourth port of a second control valve. This expands the heating applications of the thermal management control system, for example, by using a PTC heater to meet the supplemental heating needs of the crew compartment.

[0012] According to one embodiment of the present invention, the cooling water system includes a first pump for a first pipeline, a second pump for a second pipeline, and a third pump for a fourth pipeline. The first, second, and third pumps are disposed within the integral control valve block and are respectively arranged near the fourth valve port of the first control valve, the third valve port of the first control valve, and the third valve port of the second control valve. The integration of the pumps within the valve block facilitates a simplified piping design for the cooling water circuit, i.e., streamlines the piping layout of the entire system and reduces the space occupied.

[0013] According to another aspect of the present invention, a method for thermal management control using the aforementioned integrated thermal management control system is provided. The method is characterized by controlling the connection and disconnection of the valve ports of a first control valve and a second control valve based on the current battery temperature and the current motor outlet water temperature, thereby switching the cooling water circuit and adjusting the battery temperature and motor temperature to the target battery temperature and target motor outlet water temperature. The thermal management control method according to the present invention is simple and reliable, requiring only the switching of valve cores centrally located in the valve body.

[0014] According to one embodiment of the present invention, the method includes a heating mode control step, wherein the air conditioning refrigeration system is turned off and the valve positions of the first control valve and the second control valve of the integral control valve block are controlled to heat the battery temperature to a first target battery temperature, such as 22°C, the first target battery temperature being between a preset lower battery temperature threshold and a preset upper battery temperature threshold.

[0015] According to one embodiment of the present invention, when the battery temperature is lower than a preset lower limit threshold for battery temperature and the motor outlet water temperature in the second pipeline is greater than the first motor outlet water temperature threshold and less than the preset upper limit threshold for motor outlet water temperature, the first control valve is controlled to connect its first valve port to the fourth valve port and its third valve port to the fifth valve port, the second control valve is controlled to connect its first valve port to the second valve port and its third valve port to the fourth valve port, the first pump and the second pump are turned on, the third pump is turned off, the first port and the second port of the three-way valve are kept connected, the PTC heater and the fan are turned off, and the first motor outlet water temperature threshold is set to the upper limit threshold for motor outlet water temperature minus 15°C.

[0016] According to one embodiment of the present invention, when the battery temperature is lower than a preset lower limit threshold for battery temperature and the motor outlet water temperature in the second pipeline is greater than a preset lower limit threshold for motor outlet water temperature but less than a first motor outlet water temperature threshold, a shutdown command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its third valve port to its fifth valve port and its second valve port to its fourth valve port. The second control valve is controlled to connect its first valve port to its third valve port and its fifth valve port to its second valve port. The first pump and the second pump are turned on, the third pump is turned off, the first port and the second port of the three-way valve are kept connected, the PTC heater is turned on, the fan is turned off, and the first motor outlet water temperature threshold is equal to the upper limit threshold for motor outlet water temperature minus 15°C.

[0017] According to one embodiment of the present invention, when the battery temperature is lower than a preset lower limit threshold for battery temperature and the motor outlet water temperature in the second pipeline is lower than a preset lower limit threshold threshold for motor outlet water temperature, the first control valve is controlled to connect its first valve port to the fifth valve port and its second valve port to the fourth valve port, and the second control valve is controlled to connect its first valve port to the third valve port and its fifth valve port to the second valve port, the first pump and the third pump are turned on, the second pump is turned off, the first port and the second port of the three-way valve are kept connected, the PTC heater is turned on, and the fan is turned off.

[0018] According to one embodiment of the present invention, the method includes a heat preservation mode control step, wherein the air conditioning refrigeration system is turned off and the valve positions of the first control valve and the second control valve of the integral control valve block are controlled to maintain the motor outlet water temperature substantially at a target motor outlet water temperature, for example, 45°C.

[0019] According to one embodiment of the present invention, when the battery temperature is between a preset lower limit threshold and a preset upper limit threshold, and the motor outlet water temperature in the second pipeline is between a preset lower limit threshold and a preset upper limit threshold, the first control valve is controlled to connect its third valve port to the fifth valve port and its second valve port to the fourth valve port; the second control valve is controlled to connect its first valve port to the second valve port and its third valve port to the fourth valve port; the third pump is shut down; the first pump and the second pump are turned on; the first port of the three-way valve is kept connected to the second port and the third port; the PTC heater is shut down; and the fan is shut down.

[0020] According to one embodiment of the present invention, when the battery temperature is greater than a preset lower limit threshold of the battery temperature and less than a preset upper limit threshold of the battery temperature, the motor outlet water temperature in the second pipeline is less than the second motor outlet water temperature threshold and greater than the preset lower limit threshold of the motor outlet water temperature, and the motor has a heat storage request, the first control valve is controlled to connect its first valve port with the third valve port and its fourth valve port with the fifth valve port, the second control valve is controlled to connect its first valve port with the second valve port and its third valve port with the fourth valve port, the first pump and the third pump are shut down, the second pump is turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, the fan is shut down, and the second motor outlet water temperature threshold is set to the upper limit threshold of the motor outlet water temperature minus 25°C.

[0021] According to one embodiment of the present invention, when the battery temperature is greater than a preset lower limit threshold and less than a preset upper limit threshold, and the temperature difference between battery cells is greater than a preset temperature difference threshold, and the motor outlet water temperature is greater than a preset upper limit threshold, the first control valve is controlled to connect its second valve port to the third valve port and its fourth valve port to the fifth valve port; the second control valve is controlled to connect its first valve port to the second valve port and its third valve port to the fourth valve port; the third pump is shut down; the first pump and the second pump are turned on; the first port and the second port of the three-way valve are kept connected; the PTC heater is shut down; and the fan is turned on.

[0022] According to one embodiment of the present invention, the method includes a cooling mode control step, wherein the valve positions of a first control valve and a second control valve of a monolithic control valve block are controlled to cool the battery temperature to a second target battery temperature, for example, 33°C, the second target battery temperature being between a preset lower battery temperature threshold and a preset upper battery temperature threshold.

[0023] According to one embodiment of the present invention, when the battery temperature is greater than the upper limit threshold of the battery temperature and the motor outlet water temperature is greater than the preset upper limit threshold of the motor outlet water temperature, an opening command is sent to the air conditioning refrigeration system to control the first control valve to connect its second valve port with the third valve port and its fourth valve port with the fifth valve port, control the second control valve to connect its first valve port with the third valve port and its second valve port with the fourth valve port, start the first pump, the second pump and the third pump, keep the first port and the second port of the three-way valve connected, shut down the PTC heater and start the fan.

[0024] According to one embodiment of the present invention, when the ambient temperature is less than a preset ambient temperature threshold, the battery temperature is greater than a first battery temperature threshold but less than a preset upper limit battery temperature threshold, and the motor outlet water temperature is greater than a preset upper limit motor outlet water temperature threshold, a shutdown command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its second valve port to its fourth valve port and its third valve port to its fifth valve port. The second control valve is controlled to connect its first valve port to its second valve port and its third valve port to its fourth valve port. The third pump is shut down, the first pump and the second pump are turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, the fan is turned on, the first battery temperature threshold is set to the upper limit battery temperature threshold minus 5°C, and the first battery temperature threshold is greater than the second target battery temperature.

[0025] According to one embodiment of the present invention, when the battery temperature is greater than a preset upper limit threshold for battery temperature and the motor outlet water temperature is less than a preset upper limit threshold for motor outlet water temperature, an opening command is sent to the air conditioning refrigeration system to control the first control valve to connect its first valve port with the second valve port and its fourth valve port with the fifth valve port, control the second control valve to connect its second valve port with the fourth valve port and its first valve port with the third valve port, start the first pump and the third pump, stop the second pump, keep the first port and the second port of the three-way valve connected, stop the PTC heater, and start the fan.

[0026] According to one embodiment of the present invention, when the ambient temperature is less than a preset ambient temperature threshold, the battery temperature is greater than a first battery temperature threshold but less than a battery temperature upper limit threshold, and the motor outlet water temperature is less than a preset motor outlet water temperature upper limit threshold, a shutdown command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its second valve port to its fourth valve port and its first valve port to its fifth valve port. The second control valve is controlled to connect its first valve port to its second valve port and its third valve port to its fourth valve port. The second pump and the third pump are shut down, the first pump is turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, the fan is turned on, and the first battery temperature threshold is set to the battery temperature upper limit threshold minus 5°C.

[0027] According to one embodiment of the present invention, when the battery temperature is basically at the second target battery temperature and the temperature difference between the battery cells is greater than a preset temperature difference threshold between the cells, and the motor outlet water temperature is less than a preset upper limit threshold for motor outlet water temperature, a shutdown command is sent to the air conditioning refrigeration system, controlling the first control valve to connect its first valve port with the third valve port and its fourth valve port with the fifth valve port, controlling the second control valve to connect its first valve port with the second valve port and its third valve port with the fourth valve port, shutting down the third pump, turning on the first pump and the second pump, keeping the first port and the second port of the three-way valve connected, shutting down the PTC heater, and shutting down the fan.

[0028] According to another aspect of the present invention, a computer device is provided, characterized in that it includes a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the above-described method.

[0029] According to another aspect of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, the computer program including executable instructions, characterized in that, when the executable instructions are executed by a processor, the above-described method is implemented.

[0030] The integrated thermal management control system for new energy electric vehicles according to the present invention combines each cooling water circuit into modular units using a single-piece control valve block. This coordinates the connection or isolation between the cooling circuits, effectively utilizing the available thermal energy within the thermal management control system. This ensures the electric drive and battery operate at their optimal operating temperatures, increasing the transmission efficiency of the electric drive and the working efficiency of the battery, thus significantly extending the vehicle's range. The integrated cooling water circuit module of the present invention reduces installation space, shortens the energy conversion path, and increases the overall energy utilization efficiency of the system. Furthermore, the integrated cooling water circuit module design and the single-piece control valve block design provide more possibilities for system expansion or simplification, thereby meeting various possible thermal management requirements without complicating the system. Attached Figure Description

[0031] The features and advantages of the present invention will become clear from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on the invention, wherein:

[0032] Figure 1 A schematic diagram of an integrated thermal management control system according to an exemplary embodiment of the present invention is shown.

[0033] Figure 2 Show Figure 1 The illustration shows a first example of the formation of each cooling water circuit in the heating mode of an integrated thermal management control system.

[0034] Figure 3 Show Figure 1 The second example shown is the formation of each cooling water circuit in the heating mode of the integrated thermal management control system.

[0035] Figure 4 Show Figure 1 The third example shown is the formation of each cooling water circuit in the heating mode of the integrated thermal management control system.

[0036] Figure 5 Show Figure 1The fourth example shown is the formation of each cooling water circuit in the heat preservation mode of the integrated thermal management control system.

[0037] Figure 6 Show Figure 1 The fifth example shown is the formation of each cooling water circuit in the heat preservation mode of the integrated thermal management control system.

[0038] Figure 7 Show Figure 1 The sixth example shown is the formation of each cooling water circuit in the heat preservation mode of the integrated thermal management control system.

[0039] Figure 8 Show Figure 1 The seventh example shown is the formation of each cooling water circuit in the cooling mode of the integrated thermal management control system.

[0040] Figure 9 Show Figure 1 The eighth example shown is the formation of each cooling water circuit in the cooling mode of the integrated thermal management control system.

[0041] Figure 10 Show Figure 1 The ninth example shown is the formation of each cooling water circuit in the cooling mode of the integrated thermal management control system.

[0042] Figure 11 Show Figure 1 The tenth example shown is the formation of each cooling water circuit in the cooling mode of the integrated thermal management control system.

[0043] Figure 12 Show Figure 1 The eleventh example shown is the formation of each cooling water circuit in the cooling mode of the integrated thermal management control system.

[0044] Figure 13 A schematic diagram of the internal structure of a monolithic control valve block in an integrated thermal management control system according to an exemplary embodiment of the present invention is shown.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Integrated thermal management control system; 10. Cooling water system; 20. Air conditioning and refrigeration system; 101. First cooling water circuit section; 102. Second cooling water circuit section; 103. Third cooling water circuit section; 104. Fourth cooling water circuit section; 105. Fifth cooling water circuit section; 1010. First pipeline; 1020. Second pipeline; 1030. Third pipeline; 1040. Fourth pipeline; 1050. Fifth pipeline; 30. Control valve block; 301. First control valve; 302. Second control valve; 4W. Four-way pipe; 3W. Three-way valve; 3T. Three-way pipe; EV. Evaporator; COMP. Compressor; CO. Condenser; EXV. Expansion valve; P1. First pump; P2. Second pump; P3. Third pump; PH. PTC heater; RA. Radiator; FA. Fan; ED. Electric drive unit; BA. Battery. Detailed Implementation

[0047] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the invention. However, it will be apparent to those skilled in the art that implementation of the invention may not include some of these specific details. Furthermore, it should be understood that the invention is not limited to the specific embodiments described. Rather, the invention can be conceived to be practiced with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0048] The terms "first" and "second" are used below to describe the elements of this application. These terms are used only to distinguish the individual elements and not to limit the nature, order, or number of these elements. The terms "comprising" and "having" are used to indicate an open-ended inclusion and mean that there may be additional elements / components besides those listed.

[0049] Figure 1 An integrated thermal management control system 1 for new energy electric vehicles is shown. This integrated thermal management control system 1 includes a cooling water system 10 and an air conditioning system 20. The cooling water system 10 includes a first cooling water circuit section 101 for cooling the battery BA, a second cooling water circuit section 102 for cooling the electric drive unit ED, a third cooling water circuit section 103 for dissipating system heat into the surrounding air, and a fourth cooling water circuit section 104 for absorbing heat released by the condenser CO of the air conditioning system 20. Figure 1As shown, the first cooling water circuit section 101 has a first conduit 1010 through which cooling water passes between the battery BA (or a battery cooling device, such as a battery cooling plate) and the evaporator EV of the air conditioning refrigeration system. The second cooling water circuit section 102 has a second conduit 1020 through which cooling water passes between the electric drive device ED. The third cooling water circuit section 103 has a third conduit 1030 through which cooling water passes between the radiator RA equipped with a fan FA. The fourth cooling water circuit section 104 has a fourth conduit 1040 through which cooling water passes between the condenser CO of the air conditioning refrigeration system.

[0050] An integrated thermal management control system 1 includes a control valve block 30 configured to selectively fluidly connect a first, second, third, and fourth pipeline to form a cooling water circuit in a desired manner. The formed cooling water circuit is constructed by combining one or more portions of the first, second, third, and fourth cooling water circuits as basic modules, thereby enabling the integrated thermal management control system to operate under the intended thermal management mode. The control valve block in the integrated thermal management control system according to the invention is a single unit, i.e., configured as an integral valve block. At least one control valve of the form of a multi-way valve is integrated into this integral valve block. By changing the valve position of the control valve, the on / off state of each cooling water circuit portion and the connection or disconnection between them can be changed. Therefore, the control valve block is constructed as the pivot point for building the cooling water circuit.

[0051] exist Figure 1 In the illustrated embodiment, the control valve block 30 includes a first control valve 301 in the form of a multi-way valve and a second control valve 302 in the form of a multi-way valve. The first control valve 301 is configured to switch between multiple valve positions to control the on / off state or interconnection / isolation of the first cooling water circuit section 101, the second cooling water circuit section 102, and the third cooling water circuit section 103. The second control valve 302 is configured to switch between multiple valve positions to control the on / off state or interconnection / isolation of the third cooling water circuit section 103 and the fourth cooling water circuit section 104. A first end of a third conduit 1030 is connected to a first valve port 1V1 of the first control valve 301, and a second end of the third conduit 1030 is connected to a first valve port 2V1 of the second control valve 302. The second valve ports 1V2 of the first control valve 301 and 2V2 of the second control valve 302 are fluidly connected, for example, through an internal channel formed in the valve block.

[0052] like Figure 1As shown, the second pipe 1020 and the third pipe 1030 are connected to the first valve port 1V1 of the first control valve 301 via the same pipe segment, meaning the second and third pipes can be configured to be connected in series. Specifically, the first end of the second pipe 1020 is connected to the third valve port 1V3 of the first control valve 301, the second end of the second pipe 1020 is connected to the first port 4W1 of the four-way pipe 4W, the first end of the third pipe 1030 is connected to the second port 4W2 of the four-way pipe 4W, and the third port 4W3 of the four-way pipe 4W is connected to the first valve port 1V1 of the first control valve 301 via pipe segment Pa. Pipe segment Pa constitutes a shared section for the second cooling water circuit section 102 and the third cooling water circuit section 103.

[0053] The first end of the first pipe 1010 is connected to the fourth valve port 1V4 of the first control valve 301, and the second end of the first pipe 1010 is connected to the fifth valve port 1V5 of the first control valve 301. The first end of the fourth pipe 1040 is connected to the third valve port 2V3 of the second control valve 302, and the second end of the fourth pipe 1040 is connected to the fourth valve port 2V4 of the second control valve 302. A three-way valve 3W is installed in the fourth pipe 1040. The first port 3W1 of the three-way valve 3W is connected to the condenser, the second port 3W2 of the three-way valve 3W is connected to the fourth valve port 2V4 of the second control valve 302, and the third port 3W3 of the three-way valve 3W is connected to the fourth port 4W4 of the four-way pipe 4W.

[0054] The cooling water system 10 may also include a fifth cooling water circuit section 105 configured to utilize PTC supplemental heating, the fifth cooling water circuit section 105 having a fifth conduit 1050 through which cooling water passes through the PTC heater PH.

[0055] The fifth cooling water circuit section 105 is connected to the fourth cooling water circuit section 104 via a tee pipe 3T. The first end of the fifth pipe 1050 is connected to the first port 3T1 of the tee pipe 3T, the second port 3T2 of the tee pipe 3T is connected to the second port 3T2 of the three-way valve 3W, and the third port 3T3 of the tee pipe 3T is connected to the fourth valve port 2V4 of the second control valve 302. The fourth pipe 1040 and the fifth pipe 1050 are connected to the fourth valve port 2V4 of the second control valve 302 via a common pipe section Pb. Pipe section Pb constitutes a shared section for the fourth and fifth cooling water circuit sections.

[0056] By using the four-way pipe 4W, the three-way valve 3W, and the three-way pipe 3T, it is possible to selectively combine pipelines between the second cooling water circuit section / the third cooling water circuit section, the fourth cooling water circuit section, and the fifth cooling water circuit section to form a new cooling water circuit.

[0057] The air conditioning refrigeration system 20 includes a circulation system in which refrigerant circulates through an evaporator EV, a compressor COMP, a condenser CO, and an expansion valve EXV. During operation, the refrigerant absorbs heat in the evaporator, carrying away heat from the cooling water flowing through it, thus lowering the temperature of the cooling water as it leaves the evaporator. The refrigerant leaving the evaporator enters the compressor as vapor, is compressed, and then enters the condenser, where it releases heat. The cooling water flowing through the condenser absorbs this heat and heats up. Therefore, the air conditioning refrigeration system 20 can provide cooling and / or heating to the cooling water system 10 as needed.

[0058] In the integrated thermal management control system 1 of the present invention, to improve integration, a first pump P1 for a first pipeline, a second pump P2 for a second pipeline, and a third pump P3 for a fourth pipeline are integrated in the integral control valve block 30. The first pump, the second pump, and the third pump are contained in the control valve block and are arranged close to the fourth valve port 1V4 of the first control valve 301, the third valve port 1V3 of the first control valve 301, and the third valve port 2V3 of the second control valve 302, respectively. In the illustrated embodiment, the input terminals of the first pump P1, the second pump P2, and the third pump P3 are fluidly connected to the fourth valve port 1V4 of the first control valve 301, the third valve port 1V3 of the first control valve 301, and the third valve port 2V3 of the second control valve 302, respectively.

[0059] See Figure 13 As shown, the integral control valve block is constructed as a block-shaped physical entity, containing channels or grooves to form fluid communication pathways. By changing the position of the valve cores of each control valve, the fluid flow pathway is altered. Figure 13In the illustrated embodiment, the valve body of the control valve block 30 is equipped with two five-way valves: a first control valve 301 and a second control valve 302. The first control valve 301 has five ports: a passage extending from the first port 1V1 connects to a four-way pipe 4W; a passage extending from the second port 1V2 connects to the second port 2V2 of the second control valve 302; a passage extending from the third port 1V3 connects to the input port of the second pump P2; and a passage extending from the fourth port 1V4 connects to the input port of the first pump P1. The second control valve 302 has five ports: a passage extending from the first port 2V1 connects to the radiator RA; a passage extending from the third port 2V3 connects to the input port of the third pump P3; a passage extending from the fourth port 2V4 connects to a three-way pipe 3T; and a passage extending from the fifth port 2V5 connects to the PTC heater PH. By changing the position of the valve core of the first control valve 301, the channels within the valve core are shifted, connecting different valve ports. For example, this allows for connection between the first and fourth valve ports, as well as between the third and fifth valve ports. Similarly, by changing the position of the valve core of the second control valve 302, connection between the first and second valve ports, as well as between the third and fourth valve ports, can be achieved. The integration of the first pump P1, the second pump P2, and the third pump P3 within the valve body allows for a more compact control valve block design. Furthermore, the shorter passageway in the integral control valve block 30 helps reduce pipeline pressure loss. Due to the integrated construction of the control valve block, flexible and reliable control methods, such as electromagnetic control, can be used to easily and conveniently switch between multiple valve positions to meet the different needs of new energy electric vehicles in various situations. In addition, the integral control valve block design results in a smaller footprint for the entire thermal management control system. This compact thermal management control system design offers significant advantages in the limited installation space of new energy electric vehicles, providing greater room for improvement in the research and development of new energy electric vehicles.

[0060] For ease of control, temperature and / or pressure sensors are installed in each cooling water circuit. For example, a temperature sensor is installed in the second pipeline downstream of the electric drive unit to detect the motor outlet water temperature (i.e., the temperature of the cooling water in the pipeline after heat exchange with the electric drive motor). The battery management system (BMS) is signal-connected to the integrated thermal management control system to transmit a signal indicating the battery temperature to the thermal management control system in real time.

[0061] The following is based on Figure 1 The integrated thermal management control system shown illustrates the operation diagrams of the cooling water system and air conditioning refrigeration system under different thermal management modes, as well as the corresponding thermal management control methods.

[0062] The thermal management control method of the present invention responds to the comparison between the current battery temperature and the current motor outlet water temperature and their respective control targets by switching each control valve of the integral control valve block to the corresponding valve position to realize the corresponding cooling water circuit reorganization and thereby achieve the target battery temperature and the target motor outlet water temperature.

[0063] According to the thermal management control method of the present invention, the following three thermal management control modes can be realized: heating mode, heat preservation mode and cooling mode.

[0064] Heating mode

[0065] The air conditioning cooling system is turned off, and the valve positions of the first control valve 301 and the second control valve 302 of the integral control valve block 30 are controlled to heat the battery temperature to a first target battery temperature, such as 22°C. The first target battery temperature is located between a preset lower threshold (e.g., 20°C) and an upper threshold (e.g., 40°C) of battery temperature.

[0066] Example 1

[0067] When the battery temperature is lower than the preset lower limit threshold of the battery temperature and the motor outlet water temperature in the second pipeline is greater than the first motor outlet water temperature threshold (the first motor outlet water temperature threshold can be set to the upper limit threshold of the motor outlet water temperature minus 15℃, so the first motor outlet water temperature threshold is, for example, 35℃) and less than the preset upper limit threshold of the motor outlet water temperature (for example, 50℃), the first control valve 301 is controlled to connect its first valve port 1V1 with the fourth valve port 1V4 and its third valve port 1V3 with the fifth valve port 1V5. The second control valve 302 is controlled to connect its first valve port 2V1 with the second valve port 2V2 and its third valve port 2V3 with the fourth valve port 2V4. The first pump P1 and the second pump P2 are turned on, the third pump P3 is turned off, the first port 3W1 and the second port 3W2 of the three-way valve 3W are kept connected, and the PTC heater PH and the fan FA are turned off.

[0068] In this example, such as Figure 2 As shown, the first cooling water circuit section 101 and the second cooling water circuit section 102 are combined into a new combined closed loop through the connection of the first control valve 301. In this combined closed loop, under the action of the first pump and the second pump, the cooling water flows sequentially through the battery cooling device, the evaporator and the electric drive device. As a result, the cooling water transfers the heat (motor waste heat) released from the electric drive, such as the motor, to the battery, heating the battery and making the battery temperature close to the first target battery temperature.

[0069] The fourth cooling water circuit 104 is closed, but because the third pump is shut down, the third port of the three-way valve is cut off, the cooling water in the fourth cooling water circuit 104 is stagnant, the air conditioning refrigeration system is shut down, and the refrigerant in the condenser does not exchange heat with the cooling water in the fourth cooling water circuit. Although the third pipe 1030 in the third cooling water circuit is connected to the second cooling water circuit via a four-way pipe, the third pipe 1030 is in a "non-working" state because of the disconnection between the first valve port 1V1 and the second valve port 1V2 of the first control valve 301.

[0070] Example 2

[0071] When the battery temperature is lower than the preset lower limit of the battery temperature threshold and the motor outlet water temperature in the second pipeline is greater than the preset lower limit of the motor outlet water temperature threshold (e.g., 20°C) but less than the first motor outlet water temperature threshold (the first motor outlet water temperature threshold can be set to the upper limit of the motor outlet water temperature threshold minus 15°C, so the first motor outlet water temperature threshold is, for example, 35°C), a shutdown command is sent to the air conditioning refrigeration system 20. The first control valve 301 is controlled to connect its third valve port 1V3 with its fifth valve port 1V5 and its second valve port 1V2 with its fourth valve port 1V4. The second control valve 302 is controlled to connect its first valve port 2V1 with its third valve port 2V3 and its fifth valve port 2V5 with its second valve port 2V2. The first pump P1 and the second pump P2 are turned on, the third pump P3 is turned off, the first port 3W1 and the second port 3W2 of the three-way valve 3W are kept connected, the PTC heater PH is turned on, and the fan FA is turned off.

[0072] like Figure 3 As shown, in Example 2, the first pipe 1010, the second pipe 1020, the third pipe 1030, the fourth pipe 1040, and the fifth pipe 1050 are connected in series to form a new combined closed loop. In this combined closed loop, cooling water flows through the electric drive device, carrying away some heat, and then absorbs another portion of heat at the PTC heater, raising the cooling water temperature. As the cooling water flows into the battery cooling device, it heats the battery, increasing its temperature to approach the first target battery temperature. Therefore, this combined closed loop utilizes the waste heat from the motor and the PTC heater to raise the battery temperature.

[0073] Example 3

[0074] When the battery temperature is lower than the preset lower limit threshold of the battery temperature (e.g., 20°C) and the motor outlet water temperature in the second pipeline is lower than the preset lower limit threshold threshold of the motor outlet water temperature (e.g., 20°C), the first control valve 301 is controlled to connect its first valve port 1V1 with the fifth valve port 1V5 and its second valve port 1V2 with the fourth valve port 1V4. The second control valve 302 is controlled to connect its first valve port 2V1 with the third valve port 2V3 and its fifth valve port 2V5 with the second valve port 2V2. The first pump P1 and the third pump P3 are turned on, the second pump P2 is turned off, the first port 3W1 and the second port 3W2 of the three-way valve 3W are kept connected, the PTC heater PH is turned on, and the fan FA is turned off.

[0075] like Figure 4 As shown in Example 3, the fourth cooling water circuit section 104 and the fifth cooling water circuit section 105 are combined to form a new combined circuit section. This combined circuit section, together with the first cooling water circuit section and the third cooling water circuit section 103, forms a new closed combined circuit. The first pipe 1010, the third pipe 1030, the fourth pipe 1040, and the fifth pipe 1050 are connected in series. Cooling water, after being heated by the PTC heater, flows into the battery cooling device, where it heats the battery. Due to the shutdown of the fan and air conditioning system, the cooling water flows through the third and fourth pipes (which are ordinary pipes) and returns to the fifth pipe for heating by the PTC heater. This process repeats continuously. Thus, only the PTC heater is used to heat the battery, bringing the battery temperature close to the first target battery temperature.

[0076] Keep warm mode

[0077] In the method of thermal management control using the integrated thermal management control system according to the present invention, the air conditioning refrigeration system is shut down, and the integral control valve block is controlled to switch the first control valve and the second control valve to a specific valve position in order to maintain the motor outlet water temperature at a target motor outlet water temperature, such as 45°C.

[0078] Example 4

[0079] When the battery temperature is between the preset lower limit threshold (e.g., 20°C) and the upper limit threshold (e.g., 40°C) of the battery temperature, and the motor outlet water temperature in the second pipeline is between the preset lower limit threshold (e.g., 20°C) and the preset upper limit threshold (e.g., 50°C) of the motor outlet water temperature (i.e., the battery temperature and the motor outlet water temperature are within a suitable temperature range and there is no need for cooling or heating), the first control valve 301 is controlled to connect its third valve port 1V3 with its fifth valve port 1V5 and its second valve port 1V2 with its fourth valve port 1V4. The second control valve 302 is controlled to connect its first valve port 2V1 with its second valve port 2V2 and its third valve port 2V3 with its fourth valve port 2V4. The third pump P3 is shut down, the first pump P1 and the second pump P2 are turned on, the first port 3W1 of the three-way valve 3W is kept connected to the second port 3W2 and the third port 3W3, the PTC heater PH is shut down, and the fan FA is shut down.

[0080] like Figure 5 As shown in Example 4, the second cooling water circuit section 102 and the third cooling water circuit section 103 are combined to form a new circuit section in which the second and third pipes are connected in series. This circuit section is combined with the first cooling water circuit section 101 to form a closed combined circuit. In this closed combined circuit, cooling water flows through the battery, electric drive unit, and radiator, and then returns to the battery. Furthermore, this closed combined circuit is connected to the self-closed fourth cooling water circuit section via a connecting pipe located between the fourth port 4W4 of the four-way pipe 4W and the third port 3W3 of the three-way valve 3W. This reduces the temperature difference among all components in the cooling water system, maximizing the insulation of the entire system. In addition, some of the heat from the motor is transferred to the battery, and some is released to the surrounding environment through the radiator, keeping the motor outlet water temperature close to the target motor outlet water temperature (e.g., 45 degrees Celsius).

[0081] Example 5

[0082] When the battery temperature is greater than the preset lower limit of the battery temperature threshold (e.g., 20℃) but less than the preset upper limit of the battery temperature threshold (e.g., 40℃), and the motor outlet water temperature in the second pipeline is less than the second motor outlet water temperature threshold (which can be set to the upper limit of the motor outlet water temperature threshold minus 25℃, for example, the second motor outlet water temperature threshold is 25℃) but greater than the preset lower limit of the motor outlet water temperature threshold (e.g., 20℃), and the motor has a heat storage request, the first control valve 301 is controlled to connect its first valve port 1V1 with the third valve port 1V3 and its fourth valve port 1V4 with the fifth valve port 1V5. The second control valve 302 is controlled to connect its first valve port 2V1 with the second valve port 2V2 and its third valve port 2V3 with the fourth valve port 2V4. The first pump P1 and the third pump P3 are shut down, the second pump P2 is turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, and the fan is shut down.

[0083] like Figure 6 As shown, in Example 5, the first cooling water circuit 101 is closed, the second cooling water circuit 102 is closed, and the fourth cooling water circuit 104 is closed. The first and third pumps are shut down, and cooling water does not flow in the first and fourth cooling water circuits. The cooling water in the second cooling water circuit circulates itself, dissipating heat through the pipes and carrying away the heat released by the motor, thereby maintaining the motor outlet water temperature near the target motor outlet water temperature.

[0084] Example 6

[0085] When the battery temperature is greater than the preset lower limit threshold (e.g., 20℃) and less than the preset upper limit threshold (e.g., 40℃), and the temperature difference between battery cells is greater than the preset temperature difference threshold (e.g., 5℃), and the motor outlet water temperature is greater than the preset upper limit threshold (e.g., 50℃), the first control valve is controlled to connect its second valve port 1V2 with the third valve port 1V3 and its fourth valve port 1V4 with the fifth valve port 1V5. The second control valve 302 is controlled to connect its first valve port 2V1 with the second valve port 2V2 and its third valve port 2V3 with the fourth valve port 2V4. The third pump P3 is shut down, the first pump P1 and the second pump P2 are turned on, the first port 3W1 and the second port 3W2 of the three-way valve 3W are kept connected, the PTC heater is shut down, and the fan is turned on.

[0086] like Figure 7 As shown in Example 6, the second cooling water circuit section 102 and the third cooling water circuit section 103 are combined to form a closed combined circuit. In this combined circuit, cooling water flows through the electric drive unit and the radiator, and then returns to the electric drive unit. The running fan causes some heat to be dissipated from the radiator to the surrounding environment, thereby reducing the temperature of the cooling water entering the electric drive motor. Therefore, the motor outlet water temperature is maintained at the target motor outlet water temperature. The first cooling water circuit section is closed, and the operation of the first pump keeps the cooling water circulating in the first cooling water circuit section, reducing the temperature difference between the battery cells. Although the fourth cooling water circuit section is closed, the cooling water in it is stagnant because the third pump is turned off.

[0087] Cooling mode

[0088] The method of performing thermal management control using the integrated thermal management control system according to the present invention puts the entire system in a cooling mode, wherein the valve positions of the first and second control valves of the integral control valve module are controlled to cool the battery temperature to a second target battery temperature (the second target battery temperature is located between a preset lower threshold (e.g., 20°C) and an upper threshold (e.g., 40°C), such as 33°C).

[0089] Example 7

[0090] When the battery temperature exceeds the preset upper limit threshold and the motor outlet water temperature exceeds the upper limit threshold (e.g., 50°C), an opening command is sent to the air conditioning refrigeration system. This controls the first control valve 301 to connect its second valve port 1V2 with the third valve port 1V3 and its fourth valve port 1V4 with the fifth valve port 1V5. The second control valve 302 is then controlled to connect its first valve port 2V1 with the third valve port 2V3 and its second valve port 2V2 with the fourth valve port 2V4. This opens the first pump P1, the second pump P2, and the third pump P3, keeps the first and second ports of the three-way valve connected, shuts down the PTC heater, and turns on the fan.

[0091] like Figure 8 As shown in Example 7, the second cooling water circuit section 102 and the third cooling water circuit section 103 combine to form a new combined circuit section. This combined circuit section is then recombined with the fourth cooling water circuit section 104 to form a large closed loop. In this closed loop, cooling water flows sequentially through the electric drive unit, the radiator, and the condenser, before returning to the electric drive unit. The heat released by the motor and the heat released by the refrigerant at the condenser are carried away by the cooling water and dissipated at the radiator. This lowers the motor outlet water temperature. In the closed first cooling water circuit section, the cooling water releases heat at the evaporator, cools down, and then flows into the battery unit to cool the battery.

[0092] Example 8

[0093] When the ambient temperature is lower than the ambient temperature threshold (e.g., 28°C), the battery temperature is higher than the first battery temperature threshold (the first battery temperature threshold can be set to the upper limit of the battery temperature threshold minus 5°C, for example, the first battery temperature threshold is 35°C), lower than the preset upper limit of the battery temperature threshold (e.g., 40°C), and the motor outlet water temperature is higher than the preset upper limit of the motor outlet water temperature threshold (e.g., 50°C), a shutdown command is sent to the air conditioning refrigeration system. The first control valve 301 is controlled to connect its second valve port 1V2 with its fourth valve port 1V4 and its third valve port 1V3 with its fifth valve port 1V5. The second control valve 302 is controlled to connect its first valve port 2V1 with its second valve port 2V2 and its third valve port 2V3 with its fourth valve port 2V4. The third pump P3 is shut down, the first pump P1 and the second pump P2 are turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, the fan is turned on, and the first battery temperature threshold is higher than the second target battery temperature.

[0094] like Figure 9As shown in Example 8, the second cooling water circuit section 102 and the third cooling water circuit section 103 are combined to form a combined circuit section in which the second and third pipes are connected in series. This combined circuit section is combined with the first cooling water circuit section 101 to form a new closed circuit. In this new closed circuit, cooling water flows sequentially through the electric drive unit, radiator, battery, and evaporator, and then returns to the electric drive unit. Therefore, the battery and motor are cooled by means of the evaporator and radiator. The fourth cooling water circuit section is closed. In the fourth cooling water circuit section 104, the cooling water carries away some of the heat released by the refrigerant in the condenser, for example, for heating the crew compartment.

[0095] Example 9

[0096] When the battery temperature exceeds the preset upper limit threshold (e.g., 40°C) and the motor outlet water temperature is below the preset upper limit threshold (e.g., 50°C), an opening command is sent to the air conditioning refrigeration system. This controls the first control valve 301 to connect its first valve port 1V1 with the second valve port 1V2 and its fourth valve port 1V4 with the fifth valve port 1V5. The second control valve 302 is then controlled to connect its second valve port 2V2 with the fourth valve port 2V4 and its first valve port 2V1 with the third valve port 2V3. This opens the first pump P1 and the third pump P3, shuts off the second pump P2, keeps the first and second ports of the three-way valve connected, shuts off the PTC heater, and turns on the fan.

[0097] like Figure 10 As shown in Example 9, the third cooling water circuit section 103 and the fourth cooling water circuit section 104 are combined to form a closed combined circuit. In this closed combined circuit, cooling water flows sequentially through the radiator and the condenser. Some of the heat carried away at the condenser is released into the surrounding environment at the radiator. The first cooling water circuit section 101 is closed, in which cooling water is cooled at the evaporator and then flows into the battery to continuously cool the battery.

[0098] Example 10

[0099] When the ambient temperature is lower than the ambient temperature threshold (e.g., 28°C), the battery temperature is higher than the first battery temperature threshold (the first battery temperature threshold can be set to the upper limit of the battery temperature threshold minus 5°C, for example, the first battery temperature threshold is 35°C), lower than the upper limit of the battery temperature threshold (e.g., 40°C), and the motor outlet water temperature is lower than the upper limit of the motor outlet water temperature threshold (e.g., 50°C), a shutdown command is sent to the air conditioning refrigeration system. The first control valve 301 is controlled to connect its second valve port 1V2 with its fourth valve port 1V4 and its first valve port 1V1 with its fifth valve port 1V5. The second control valve 302 is controlled to connect its first valve port 2V1 with its second valve port 2V2 and its third valve port 2V3 with its fourth valve port 2V4. The second pump P2 and the third pump P3 are shut down, the first pump P1 is turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, and the fan is turned on.

[0100] like Figure 11 As shown in Example 10, the first cooling water circuit section 101 and the third cooling water circuit section 103 combine to form a new closed loop. In this closed loop, cooling water flows through the battery, evaporator, and radiator, and then returns to the battery. Since the air conditioning system is off, the evaporator is not working, so the heat dissipated by the battery is transferred from the cooling water to the radiator and released into the surrounding environment. The fourth cooling water circuit section is closed. The condenser is not working, and the cooling water in the fourth cooling water circuit section 104 remains stationary.

[0101] Example 11

[0102] When the battery temperature is basically at the second target battery temperature (e.g., 33℃) and the temperature difference between the battery cells is greater than the preset temperature difference threshold between the cells (e.g., 5℃), and the motor outlet water temperature is less than the upper limit threshold of the motor outlet water temperature (e.g., 50℃), a shutdown command is sent to the air conditioning refrigeration system. The first control valve 301 is controlled to connect its first valve port 1V1 with the third valve port 1V3 and its fourth valve port 1V4 with its fifth valve port 1V5. The second control valve 302 is controlled to connect its first valve port 2V1 with its second valve port 2V2 and its third valve port 2V3 with its fourth valve port 2V4. The third pump P3 is shut down, the first pump P1 and the second pump P2 are turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, and the fan is shut down.

[0103] like Figure 12 As shown in Example 11, the first cooling water circuit 101 is closed, the evaporator is not working, and therefore, the cooling water in the first cooling water circuit flows through the battery cooling device under the action of the first pump to reduce the temperature difference between the battery cells. The second cooling water circuit 102 is closed, in which the cooling water circulates through the motor under the action of the second pump to cool the motor. The fourth cooling water circuit 104 is closed. Since the third pump is turned off, the cooling water in the fourth cooling water circuit does not flow.

[0104] Examples 1 to 11 above are merely illustrative of specific embodiments and application modes of the thermal management control system according to the present invention. Those skilled in the art will understand that the control valve block can be designed in other ways, such as including a ten-way valve. The thermal management control system can also switch between cooling, heat preservation, and heating modes through the passage design of the ten-way valve. In the thermal management control system according to the present invention, the cooling water system can also be designed with different cooling water circuit units or modules; for example, it can be... Figure 1 The thermal management control system shown partially shares piping while using other methods to achieve the same functional pathways.

[0105] The specific limitations and beneficial effects of the above-mentioned thermal management control method can be found in the limitations of the thermal management control system mentioned above, and will not be repeated here.

[0106] According to another aspect of the present invention, a hardware structure for a computer device is provided. The computer device includes one or more processors and a memory, including persistent memory, volatile memory, and a hard disk. The computer device may further include an input device and an output device. The processor, memory, input device, and output device can be connected via a bus or other means.

[0107] The processor can be a central processing unit (CPU). It can also be other general-purpose processors, digital signal processors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations thereof. A general-purpose processor can be a microprocessor or any conventional processor.

[0108] Memory, as a non-transitory computer-readable storage medium, includes persistent memory, volatile memory, and hard disks, and can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules. The processor executes various server functions and data processing by running the non-transitory software programs, instructions, and modules stored in memory, thus implementing the aforementioned thermal management control methods.

[0109] The memory may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data that is needed and required. Furthermore, the memory may include high-speed random access memory and non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory may optionally include memory remotely located relative to the processor, which can be connected to the data processing device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0110] The input device can receive input numerical or character information, and generate key signal inputs related to user settings and function control. The output device may include display devices such as a display screen.

[0111] When the computer instructions stored in the memory are executed by the processor, the thermal management control method of the present invention is executed.

[0112] This invention also provides a computer-readable storage medium storing computer-executable instructions. When these instructions are executed by a computer's processor, the processor can perform the aforementioned thermal management control method. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; the storage medium can also include any combination of the above types of memory.

[0113] Industrial applicability

[0114] The thermal management control system according to the present invention is particularly suitable for pure electric new energy vehicles. However, it should be understood that the thermal management control system according to the present invention can also be used in other vehicles or equipment with cooling water circuit systems and thermal management control requirements.

[0115] The thermal management control system of the present invention uses a control valve block as the control hub, dividing the entire cooling water system into cooling water circuit modules. Based on the operating requirements of the electric drive motor and battery, the valve position of the control valve block is switched rapidly and responsively, utilizing available waste heat or cooling media within the thermal management control system to ensure the electric drive motor and battery operate at suitable temperatures. This increases the transmission efficiency of the electric drive and the working efficiency of the battery, greatly contributing to the improvement of the electric vehicle's range. In the thermal management control system of the present invention, the cooling water circuit modules achieve an integrated cooling water system through the control valve block, saving installation space, shortening the energy conversion path, and increasing energy utilization. Furthermore, the integrated cooling water system can be arbitrarily expanded or simplified to meet various potential or new thermal management requirements.

[0116] The above description merely illustrates exemplary embodiments of the thermal management control method and system according to the present invention. The method and system are not limited to the specific embodiments described herein. Throughout this specification, the terms "an example," "another example," "example," etc., mean that a certain element / component (e.g., feature, structure, and / or characteristic) associated with the example is included in at least one example described herein, and may appear and / or may not appear in other examples. Furthermore, it is understood that multiple elements of any example described may be combined in any suitable manner in multiple different examples, unless the context clearly indicates otherwise.

[0117] This specification uses examples to disclose the invention, including preferred embodiments, and enables any person skilled in the art to implement the invention. The patentable scope of the invention is defined by the claims, but may include other examples that may be conceived by a person skilled in the art. Such other examples should fall within the scope of the claims if they have structural elements that are not distinct from the literal language of the claims, or if they include equivalent structural elements that are not substantially distinct from the literal language of the claims.

Claims

1. An integrated thermal management control system for new energy electric vehicles, comprising a cooling water system and an air conditioning system, said cooling water system comprising a first cooling water circuit having a first pipe through an evaporator of a battery cooling device and an air conditioning system, a second cooling water circuit having a second pipe through an electric drive device, a third cooling water circuit having a third pipe through a radiator equipped with a fan, and a fourth cooling water circuit having a fourth pipe through a condenser of an air conditioning system, characterized in that, The integrated thermal management control system includes a monolithic control valve block configured to selectively fluidly connect a first, second, third, and fourth pipeline to achieve operation of a cooling water circuit under a desired thermal management mode. The monolithic control valve block includes at least one control valve in the form of a multi-way valve.

2. The integrated thermal management control system according to claim 1, characterized in that, The control valve block includes a first control valve in the form of a multi-way valve and a second control valve in the form of a multi-way valve. The first control valve is configured to switch between multiple valve positions to control the on / off state or the connection or isolation between the first, second, and third cooling water circuit sections. The second control valve is configured to switch between multiple valve positions to control the on / off state or the connection or isolation between the third and fourth cooling water circuit sections. The first end of the third pipeline is connected to the first valve port of the first control valve, the second end of the third pipeline is connected to the first valve port of the second control valve, and the second valve port of the first control valve is fluidly connected to the second valve port of the second control valve.

3. The integrated thermal management control system according to claim 2, characterized in that, The first end of the second pipeline is connected to the third valve port of the first control valve, the second end of the second pipeline is connected to the first port of the four-way pipe, the first end of the third pipeline is connected to the second port of the four-way pipe, and the third port of the four-way pipe is connected to the first valve port of the first control valve.

4. The integrated thermal management control system according to claim 3, characterized in that, The first end of the first pipeline is connected to the fourth valve port of the first control valve, the second end of the first pipeline is connected to the fifth valve port of the first control valve, the first end of the fourth pipeline is connected to the third valve port of the second control valve, and the second end of the fourth pipeline is connected to the fourth valve port of the second control valve.

5. The integrated thermal management control system according to claim 4, characterized in that, A three-way valve is installed in the fourth pipeline. The first port of the three-way valve is connected to the condenser, the second port of the three-way valve is connected to the fourth valve port of the second control valve, and the third port of the three-way valve is connected to the fourth port of the four-way pipe.

6. The integrated thermal management control system according to claim 5, characterized in that, The cooling water system includes a fifth cooling water circuit section having a fifth pipe through which cooling water passes through a PTC heater. The first end of the fifth pipe is connected to the first port of a three-way pipe, the second port of the three-way pipe is connected to the second port of a three-way valve, and the third port of the three-way pipe is connected to the fourth port of a second control valve.

7. The integrated thermal management control system according to claim 6, characterized in that, The cooling water system includes a first pump for a first pipeline, a second pump for a second pipeline, and a third pump for a fourth pipeline. The first pump, the second pump, and the third pump are disposed in the integral control valve block and are respectively arranged close to the fourth valve port of the first control valve, the third valve port of the first control valve, and the third valve port of the second control valve.

8. A method for thermal management control using the integrated thermal management control system described in claim 7, characterized in that, Based on the current battery temperature and the current motor outlet water temperature, the valve ports of the first control valve and the second control valve are connected and disconnected to switch the cooling water circuit and thereby adjust the battery temperature and motor temperature to the target battery temperature and the target motor outlet water temperature.

9. The method according to claim 8, characterized in that, The heating mode control step includes turning off the air conditioning cooling system and controlling the valve positions of the first and second control valves of the integral control valve block to heat the battery temperature to a first target battery temperature, such as 22°C. The first target battery temperature is located between a preset lower battery temperature threshold and a preset upper battery temperature threshold.

10. The method according to claim 9, characterized in that, When the battery temperature is lower than the preset lower limit of the battery temperature threshold and the water temperature at the motor outlet in the second pipeline is greater than the first motor outlet temperature threshold but less than the preset upper limit of the motor outlet temperature threshold, the first control valve is controlled to connect its first valve port to the fourth valve port and its third valve port to the fifth valve port. The second control valve is controlled to connect its first valve port to the second valve port and its third valve port to the fourth valve port. The first pump and the second pump are turned on, the third pump is turned off, the first port and the second port of the three-way valve are kept connected, the PTC heater and the fan are turned off, and the first motor outlet temperature threshold is set to the upper limit of the motor outlet temperature threshold minus 15°C.

11. The method according to claim 9, characterized in that, When the battery temperature is lower than the preset lower limit of the battery temperature and the motor outlet water temperature in the second pipeline is greater than the preset lower limit of the motor outlet water temperature but less than the first motor outlet water temperature threshold, a shutdown command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its third valve port to the fifth valve port and its second valve port to the fourth valve port. The second control valve is controlled to connect its first valve port to the third valve port and its fifth valve port to the second valve port. The first pump and the second pump are turned on, the third pump is turned off, the first port and the second port of the three-way valve are kept connected, the PTC heater is turned on, the fan is turned off, and the first motor outlet water temperature threshold is set to the upper limit of the motor outlet water temperature threshold minus 15°C.

12. The method according to claim 9, characterized in that, When the battery temperature is lower than the preset lower limit of the battery temperature and the water temperature at the motor outlet in the second pipeline is lower than the preset lower limit of the motor outlet temperature, the first control valve is controlled to connect its first valve port to the fifth valve port and its second valve port to the fourth valve port. The second control valve is controlled to connect its first valve port to the third valve port and its fifth valve port to the second valve port. The first pump and the third pump are turned on, the second pump is turned off, the first port and the second port of the three-way valve are kept connected, the PTC heater is turned on, and the fan is turned off.

13. The method according to claim 8, characterized in that, The system includes a heat preservation mode control step, in which the air conditioning refrigeration system is turned off and the valve positions of the first and second control valves of the integral control valve block are controlled to maintain the motor outlet water temperature substantially at the target motor outlet water temperature, such as 45°C.

14. The method according to claim 13, characterized in that, When the battery temperature is between the preset lower and upper thresholds of the battery temperature and the motor outlet water temperature in the second pipeline is between the preset lower and upper thresholds of the motor outlet water temperature, the first control valve is controlled to connect its third and fifth valve ports and its second and fourth valve ports. The second control valve is controlled to connect its first and second valve ports and its third and fourth valve ports. The third pump is shut down, the first and second pumps are turned on, the first and third ports of the three-way valve are kept connected, the PTC heater is shut down, and the fan is turned off.

15. The method according to claim 13, characterized in that, When the battery temperature is greater than the preset lower limit of the battery temperature threshold but less than the preset upper limit of the battery temperature threshold, and the motor outlet water temperature in the second pipeline is less than the second motor outlet water temperature threshold but greater than the preset lower limit of the motor outlet water temperature threshold, and the motor has a heat storage request, the first control valve is controlled to connect its first valve port with the third valve port and its fourth valve port with the fifth valve port, the second control valve is controlled to connect its first valve port with the second valve port and its third valve port with the fourth valve port, the first pump and the third pump are shut down, the second pump is turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, the fan is shut down, and the second motor outlet water temperature threshold is set to the upper limit of the motor outlet water temperature threshold minus 25°C.

16. The method according to claim 13, characterized in that, When the battery temperature is greater than the preset lower limit of the battery temperature threshold but less than the preset upper limit of the battery temperature threshold, and the temperature difference between the battery cells is greater than the preset temperature difference between the cells threshold, and the motor outlet water temperature is greater than the preset upper limit of the motor outlet water temperature threshold, the first control valve is controlled to connect its second valve port with the third valve port and its fourth valve port with the fifth valve port, the second control valve is controlled to connect its first valve port with the second valve port and its third valve port with the fourth valve port, the third pump is shut down, the first pump and the second pump are turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, and the fan is turned on.

17. The method according to claim 8, characterized in that, The system includes a cooling mode control step, in which the valve positions of the first and second control valves of the integral control valve block are controlled to cool the battery temperature to a second target battery temperature, such as 33°C, which is located between a preset lower battery temperature threshold and a preset upper battery temperature threshold.

18. The method according to claim 17, characterized in that, When the battery temperature exceeds the upper limit threshold and the motor outlet water temperature exceeds the preset upper limit threshold, an opening command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its second and third valve ports and its fourth and fifth valve ports. The second control valve is controlled to connect its first and third valve ports and its second and fourth valve ports. The first, second, and third pumps are turned on. The first and second ports of the three-way valve are kept connected. The PTC heater is turned off. The fan is turned on.

19. The method according to claim 17, characterized in that, When the ambient temperature is lower than the ambient temperature threshold, the battery temperature is higher than the first battery temperature threshold but lower than the preset upper limit of the battery temperature, and the motor outlet water temperature is higher than the preset upper limit of the motor outlet water temperature, a shutdown command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its second valve port to the fourth valve port and its third valve port to the fifth valve port. The second control valve is controlled to connect its first valve port to the second valve port and its third valve port to the fourth valve port. The third pump is shut down, the first pump and the second pump are turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, the fan is turned on, the first battery temperature threshold is set to the upper limit of the battery temperature minus 5°C, and the first battery temperature threshold is higher than the second target battery temperature.

20. The method according to claim 17, characterized in that, When the battery temperature exceeds the preset upper limit threshold and the motor outlet water temperature is less than the preset upper limit threshold, an opening command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its first valve port to the second valve port and its fourth valve port to the fifth valve port. The second control valve is controlled to connect its second valve port to the fourth valve port and its first valve port to the third valve port. The first and third pumps are turned on, the second pump is turned off, the first and second ports of the three-way valve are kept connected, the PTC heater is turned off, and the fan is turned on.

21. The method according to claim 17, characterized in that, When the ambient temperature is lower than the preset ambient temperature threshold, the battery temperature is higher than the first battery temperature threshold but lower than the upper limit of the battery temperature threshold, and the motor outlet water temperature is lower than the preset upper limit of the motor outlet water temperature threshold, a shutdown command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its second valve port to the fourth valve port and its first valve port to the fifth valve port. The second control valve is controlled to connect its first valve port to the second valve port and its third valve port to the fourth valve port. The second pump and the third pump are shut down, the first pump is turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, the fan is turned on, and the first battery temperature threshold is set to the upper limit of the battery temperature threshold minus 5°C.

22. The method according to claim 17, characterized in that, When the battery temperature is basically at the second target battery temperature and the temperature difference between the battery cells is greater than the preset temperature difference threshold between the cells, and the motor outlet water temperature is less than the preset upper limit threshold of the motor outlet water temperature, a shutdown command is sent to the air conditioning refrigeration system. The first control valve is controlled to connect its first valve port with the third valve port and its fourth valve port with the fifth valve port. The second control valve is controlled to connect its first valve port with the second valve port and its third valve port with the fourth valve port. The third pump is shut down, the first pump and the second pump are turned on, the first port and the second port of the three-way valve are kept connected, the PTC heater is shut down, and the fan is shut down.

23. A computer device, characterized in that, The device includes a memory and a processor, the memory and the processor being communicatively connected, the memory storing computer instructions, and the processor executing the computer instructions to perform the method according to any one of claims 8-22.

24. A computer-readable storage medium having a computer program stored thereon, the computer program including executable instructions, characterized in that, When the executable instruction is executed by the processor, the method according to any one of claims 8-22 is performed.

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