Thermal management system, electric equipment and control method of thermal management system

Abstract

The invention discloses a thermal management system, electric equipment and a control method of the thermal management system, and belongs to the technical field of new energy. The heat management system comprises a refrigeration main circuit, a first branch circuit, a second branch circuit, a first temperature sensor, a second temperature sensor and a controller, the first branch circuit is connected with the refrigeration main circuit, and the first branch circuit is provided with a cooler and used for exchanging heat with a battery; the second branch and the first branch are connected in parallel, and the second branch is provided with an evaporator; the first temperature sensor is used for detecting the evaporation temperature of the cooler; the second temperature sensor is used for detecting the evaporation temperature of the evaporator; the controller is electrically connected with the compressor of the refrigeration main path, the first temperature sensor and the second temperature sensor, and the controller is used for adjusting the rotating speed of the compressor based on at least one of the first temperature sensor and the second temperature sensor. The redundancy and the cost of the thermal management system are reduced, the control is convenient, and the control precision and the response capability can be improved.

Description

Technical Field

[0001] The present application belongs to the field of new energy technology, and in particular relates to a thermal management system, electrical equipment, and a control method for the thermal management system. Background Art

[0002] As people pay more and more attention to environmental protection and low carbon, the pace of development of new energy vehicles has also accelerated significantly. The integration of automobiles with related technologies in the fields of energy, transportation, information and communications has accelerated, and electrification, networking and intelligence have become the development trend of the automobile industry. New technologies for new energy vehicles have sprung up, for example:

[0003] The application number is CN202410658157.7, the publication number is CN118238797B, and the invention name is New Energy Vehicle Energy Intelligent Management System, Control Method and Related Equipment;

[0004] The application number is CN202410672579.X, the publication number is CN118597091A, and the invention name is "New Energy Vehicle Energy Intelligent Management Method, System and Related Equipment";

[0005] The application number is CN202010470247.5, the publication number is CN113734146B, and the invention name is vehicle driving mode selection method, device, equipment and medium;

[0006] They all describe hybrid technology that is mainly electric, and has multiple advantages such as being fast, economical, quiet, smooth, and green.

[0007] The application number is CN202211678720.4, the publication number is CN117382629B, and the invention name is vehicle power control method, device, medium, vehicle controller and vehicle;

[0008] The application number is CN202311164098.X, the publication number is CN116890770B, and the invention name is vehicle control system, method and vehicle;

[0009] The application number is CN202311170393.6, the publication number is CN117533292B, and the invention name is vehicle control system, control method, controller and vehicle;

[0010] Both describe a new energy power system with four wheel-side motors independently driven as the core, which greatly improves the safety and power of new energy vehicles.

[0011] However, the current thermal management system in vehicles has technical problems such as high redundancy, high cost and difficulty in control, and cannot meet the needs of lightweight and low cost of the entire vehicle. Summary of the invention

[0012] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a thermal management system, an electrical device and a control method of the thermal management system, which reduces the redundancy and cost of the thermal management system, is not only easy to control, but also improves the control accuracy and responsiveness.

[0013] In a first aspect, the present application provides a thermal management system, comprising:

[0014] Refrigeration main circuit;

[0015] A first branch circuit is connected to the refrigeration main circuit, and the first branch circuit is provided with a cooler for performing heat exchange with the battery;

[0016] A second branch, connected in parallel with the first branch, wherein the second branch is provided with an evaporator;

[0017] A first temperature sensor, used to detect the evaporation temperature of the cooler;

[0018] a second temperature sensor, used to detect the evaporation temperature of the evaporator;

[0019] A controller is electrically connected to the compressor of the main refrigeration circuit, the first temperature sensor and the second temperature sensor respectively, and the controller is used to adjust the rotation speed of the compressor based on at least one of the first temperature sensor and the second temperature sensor.

[0020] According to the thermal management system of the present application, when the battery needs to be cooled, the controller obtains the evaporation temperature of the cooler in real time according to the first temperature sensor to adjust the speed of the compressor in real time; when the battery needs to be cooled and the passenger compartment needs to be cooled at the same time, the controller obtains the evaporation temperature of the evaporator in real time according to the second temperature sensor to adjust the speed of the compressor in real time, which not only realizes intelligent temperature control, but also makes the control logic as simple and clear as possible, reduces the difficulty of development and maintenance, and reduces the complexity and cost of the thermal management system while ensuring the cooling performance of the thermal management system. In addition, by combining the main cooling circuit, cooler, evaporator, first temperature sensor and second temperature sensor to form an integrated thermal management system, it can also reduce unnecessary repeated components and reduce the redundancy problem of the thermal management system.

[0021] According to one embodiment of the present application, the thermal management system has a battery single-open cooling mode and a dual-open cooling mode, wherein:

[0022] In the battery single-open cooling mode, the first branch circuit is connected to the cooling main circuit, and the controller adjusts the speed of the compressor based on the evaporation temperature of the cooler;

[0023] In the dual-open cooling mode, the first branch and the second branch are respectively connected to the main cooling circuit, and the controller adjusts the rotation speed of the compressor based on the evaporation temperature of the evaporator.

[0024] According to one embodiment of the present application, a connected compressor and a condenser are provided on the main refrigeration circuit, and a first valve group is also provided on the first branch. The first valve group is at least partially located between the condenser and the cooler, and the first valve group is used to adjust the refrigerant flow of the first branch.

[0025] According to one embodiment of the present application, the first valve group includes:

[0026] a first solenoid valve, located between the condenser and the cooler, and electrically connected to the controller, wherein the controller is used to control the on / off between the first branch circuit and the refrigeration main circuit based on the first solenoid valve;

[0027] The first thermal expansion valve is located between the first solenoid valve and the cooler.

[0028] According to one embodiment of the present application, the first inlet end of the first thermal expansion valve is connected to the outlet end of the first solenoid valve, the outlet end of the first thermal expansion valve is connected to the inlet end of the cooler, and the second inlet end of the first thermal expansion valve is connected to the outlet end of the cooler.

[0029] According to one embodiment of the present application, the first valve group further includes:

[0030] A pressure stabilizing valve is located between the compressor and the cooler.

[0031] According to one embodiment of the present application, a connected compressor and condenser are provided on the main refrigeration circuit, and a second valve group is also provided on the second branch, the second valve group is located between the condenser and the evaporator, and the second valve group is used to adjust the refrigerant flow of the second branch.

[0032] According to one embodiment of the present application, the second valve group includes:

[0033] a second solenoid valve, located between the condenser and the evaporator, and electrically connected to the controller, wherein the controller is used to control the connection and disconnection between the second branch circuit and the refrigeration main circuit based on the second solenoid valve;

[0034] The second thermal expansion valve is located between the second solenoid valve and the evaporator.

[0035] According to one embodiment of the present application, a pressure sensor is provided on the main refrigeration circuit, and the pressure sensor is electrically connected to the controller for obtaining the refrigerant pressure flowing out of the condenser of the main refrigeration circuit. The controller controls the start and stop of the compressor based on the refrigerant pressure obtained by the pressure sensor.

[0036] In a second aspect, the present application provides an electrical device, the electrical device comprising:

[0037] Batteries, and

[0038] The thermal management system as described above is at least used for performing thermal management on the battery.

[0039] The electrical equipment according to the present application reduces manufacturing costs and maintenance costs, and meets lightweight requirements.

[0040] In a third aspect, the present application provides a control method for a thermal management system, the control method for the thermal management system comprising:

[0041] obtaining a current rotation speed of the compressor and a current evaporation temperature of at least one of the cooler and the evaporator;

[0042] determining a target speed of the compressor based on a current speed of the compressor and a current evaporation temperature of at least one of a cooler and an evaporator;

[0043] The rotation speed of the compressor is controlled according to the target rotation speed.

[0044] The control method of the thermal management system according to the present application is not only convenient for control but also can improve the control accuracy and responsiveness.

[0045] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0047] Figure 1 It is a schematic diagram of the structure of the thermal management system provided in the embodiment of the present application in the battery single-open cooling mode;

[0048] Figure 2 It is a schematic diagram of the structure of the thermal management system provided in the embodiment of the present application in the dual-open cooling mode;

[0049] Figure 3 is a flow chart of a control method of a thermal management system provided by an embodiment of the present application;

[0050] Figure 4 is a schematic diagram of the structure of a control device for a thermal management system provided in an embodiment of the present application;

[0051] Figure 5 It is a hardware schematic diagram of the electronic device provided in the embodiment of the present application.

[0052] Reference numerals:

[0053] 10. Battery;

[0054] 100, main refrigeration circuit; 110, compressor;

[0055] 120, condenser; 121, condenser body; 122, condenser fan; 130, pressure sensor;

[0056] 200, first branch; 210, cooler;

[0057] 221, first solenoid valve; 222, first thermal expansion valve; 223, pressure stabilizing valve;

[0058] 300, second branch; 310, evaporator;

[0059] 321, second solenoid valve; 322, second thermal expansion valve;

[0060] 400. a first temperature sensor;

[0061] 500. Second temperature sensor. DETAILED DESCRIPTION

[0062] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0063] Reference below Figure 1-Figure 2 The thermal management system provided in the embodiment of the present application is described, and the thermal management system includes a refrigeration main circuit 100, a first branch circuit 200, a second branch circuit 300, a first temperature sensor 400, a second temperature sensor 500 and a controller.

[0064] The first branch 200 is connected to the refrigeration main circuit 100 , and is provided with a cooler 210 for heat exchange with the battery 10 ; the second branch 300 is connected in parallel with the first branch 200 , and is provided with an evaporator 310 .

[0065] It can be understood that the main refrigeration circuit 100 is provided with a compressor 110 and a condenser 120 connected end to end, that is, the high-temperature and high-pressure gas-phase refrigerant flows out of the compressor 110 and passes through the condenser 120 to become a high-pressure liquid phase, and then flows into at least one of the evaporator 310 and the cooler 210. The low-temperature and low-pressure gas-phase refrigerant after heat exchange flows back into the compressor 110, that is, a circulation loop of refrigerant flow is formed (the main refrigeration circuit 100 is connected to at least one of the first branch 200 and the second branch 300), thereby realizing the cooling demand for at least one of the battery 10 and the passenger compartment.

[0066] The first temperature sensor 400 is used to detect the evaporation temperature of the cooler 210; the second temperature sensor 500 is used to detect the evaporation temperature of the evaporator 310; the controller is electrically connected to the compressor 110 of the refrigeration main circuit 100, the first temperature sensor 400 and the second temperature sensor 500, respectively, and the controller is used to adjust the speed of the compressor 110 based on at least one of the first temperature sensor 400 and the second temperature sensor 500. Exemplarily, the cooler 210 includes but is not limited to a direct cooling plate; the first temperature sensor 400 and the second temperature sensor 500 include but are not limited to a thermocouple, a thermistor, a resistance temperature detector or an IC temperature sensor, etc.

[0067] It should be noted that the evaporation temperature of the cooler 210 refers to the temperature of the refrigerant at the inlet end of the cooler 210 , and the evaporation temperature of the evaporator 310 refers to the temperature of the refrigerant at the inlet end of the evaporator 310 .

[0068] It is understandable that when the battery 10 needs to be cooled, the controller obtains the evaporation temperature of the cooler 210 in real time according to the first temperature sensor 400 to adjust the speed of the compressor 110 in real time; when the battery 10 needs to be cooled while the passenger compartment is cooled, the controller obtains the evaporation temperature of the evaporator 310 in real time according to the second temperature sensor 500 to adjust the speed of the compressor 110 in real time, which not only realizes intelligent temperature control, but also makes the control logic as simple and clear as possible, reduces the difficulty of development and maintenance, and reduces the complexity and cost of the thermal management system while ensuring the refrigeration performance of the thermal management system. In addition, by combining the refrigeration main circuit 100, the cooler 210, the evaporator 310, the first temperature sensor 400 and the second temperature sensor 500 to form an integrated thermal management system, it can also reduce unnecessary repeated components and reduce the redundancy problem of the thermal management system.

[0069] The thermal management system provided in the embodiment of the present application reduces the redundancy and cost of the thermal management system, which not only facilitates control but also improves control accuracy and responsiveness.

[0070] In some embodiments, Figure 1 and Figure 2As shown, the thermal management system has a battery single-open cooling mode and a dual-open cooling mode, wherein, in the battery single-open cooling mode, the first branch 200 is connected to the refrigeration main circuit 100, and the controller adjusts the speed of the compressor 110 based on the evaporation temperature of the cooler 210; in the dual-open cooling mode, the first branch 200 and the second branch 300 are respectively connected to the refrigeration main circuit 100, and the controller adjusts the speed of the compressor 110 based on the evaporation temperature of the evaporator 310.

[0071] It is understandable that if Figure 1 As shown, when only the battery 10 needs to be cooled, the thermal management system switches to the battery single cooling mode. At this time, only the first branch 200 is connected to the cooling main circuit 100, and the cooler 210 works alone. The controller adjusts the speed of the compressor 110 according to the evaporation temperature of the cooler 210 obtained by the first temperature sensor 400 to accurately meet the heat dissipation requirements of the battery 10, thereby improving the operating efficiency of the system and reducing energy consumption. Figure 2 As shown, when it is necessary to cool the battery 10 and the space in the passenger compartment at the same time, the thermal management system switches to the dual-open cooling mode, the first branch 200 and the second branch 300 are respectively connected to the cooling main circuit 100, the cooler 210 and the evaporator 310 work at the same time, and the controller adjusts the speed of the compressor 110 according to the evaporation temperature of the evaporator 310 obtained by the second temperature sensor 500 to give priority to meeting the user's cooling needs. By setting different cooling modes, the cooling resources can be reasonably allocated according to actual needs. In the battery single-open cooling mode, the cooling capacity can be concentrated on the heat dissipation of the battery 10, ensuring that the battery 10 works within the optimal temperature range and prolonging the life of the battery 10; in the dual-open cooling mode, the cooling needs of the battery 10 and the passenger compartment are balanced, improving the overall performance of the thermal management system.

[0072] In some embodiments, the thermal management system also has a passenger compartment single cooling mode, wherein in the passenger compartment single cooling mode, the second branch 300 is connected to the refrigeration main circuit 100, and the controller adjusts the speed of the compressor 110 based on the evaporation temperature of the evaporator 310.

[0073] It is understandable that when only the passenger compartment needs to be cooled, the thermal management system switches to the passenger compartment single cooling mode, at which time only the second branch 300 is connected to the cooling main circuit 100, and the evaporator 310 works alone. The controller adjusts the speed of the compressor 110 according to the evaporation temperature of the evaporator 310 obtained by the second temperature sensor 500 to accurately meet the cooling needs of the passenger compartment, thereby improving the operating efficiency of the system and reducing energy consumption. Through the reasonable switching of the three modes, the thermal management system can accurately allocate cooling resources according to actual needs, ensuring that the cooling needs can be met with the lowest energy consumption under any working conditions, further reducing the operating costs of the system.

[0074] In some embodiments, Figure 1 and Figure 2 As shown, the refrigeration main circuit 100 is provided with a connected compressor 110 and a condenser 120, and the first branch circuit 200 is also provided with a first valve group, the first valve group is at least partially located between the condenser and the cooler 210, and the first valve group is used to adjust the refrigerant flow of the first branch circuit 200. For example, Figure 1 and Figure 2 As shown, the condenser 120 includes a condenser body 121 and a condenser fan 122, that is, the refrigerant passes through the condenser body 121 to realize the transformation of the refrigerant from gas to liquid; the condenser fan 122 is located outside the condenser body 121, and is used to blow air to the condenser body 121 to help air circulation and take away the heat on the condenser body 121.

[0075] It can be understood that at least part of the first valve group is located between the condenser body 121 and the cooler 210, and can dynamically adjust the refrigerant flow in the first branch 200 according to the actual heat dissipation demand of the battery 10, thereby optimizing the heat dissipation effect of the battery 10, avoiding over-cooling or insufficient cooling, and helping to extend the life of the battery 10 while improving the working efficiency of the battery 10.

[0076] In some embodiments, Figure 1 and Figure 2 As shown, the first valve group includes a first solenoid valve 221 and a first thermal expansion valve 222. The first solenoid valve 221 is located between the condenser 120 and the cooler 210, and is electrically connected to the controller. The controller is used to control the on-off between the first branch 200 and the refrigeration main circuit 100 based on the first solenoid valve 221; the first thermal expansion valve 222 is located between the first solenoid valve 221 and the cooler 210.

[0077] It is understandable that the first solenoid valve 221 is located between the condenser body 121 and the cooler 210, and is electrically connected to the controller, and can realize the connection and disconnection between the first branch 200 and the refrigeration main circuit 100 according to the instructions of the controller, so that the thermal management system can quickly switch the refrigeration mode according to actual needs. For example, in the battery single-open refrigeration mode, the controller can open the first solenoid valve 221 to allow the refrigerant to flow into the first branch 200; when the battery 10 is not required to be refrigerated, the first solenoid valve 221 is closed to cut off the refrigerant from flowing into the first branch 200. Compared with the use of an electronic expansion valve, the first thermal expansion valve 222 can automatically adjust the opening according to the actual needs of the cooler 210 to adjust the superheat of the refrigerant at the outlet of the cooler 210 (i.e., the difference between the real-time temperature of the refrigerant and the saturation temperature of the refrigerant), ensuring that the cooler 210 always obtains an appropriate amount of refrigerant while reducing the control difficulty and complexity, and reducing the redundancy of the thermal management system.

[0078] In some embodiments, Figure 1 and Figure 2 As shown, the first inlet end of the first thermal expansion valve 222 is connected to the outlet end of the first solenoid valve 221 , the outlet end of the first thermal expansion valve 222 is connected to the inlet end of the cooler 210 , and the second inlet end of the first thermal expansion valve 222 is connected to the outlet end of the cooler 210 .

[0079] It is understandable that in the battery single-open cooling mode and double-open cooling mode, the refrigerant flows out from the condenser body 121 and flows back to the compressor 110 after passing through the first solenoid valve 221, the first thermal expansion valve 222, and the cooler 210 in sequence; at the same time, the refrigerant flowing out of the cooler 210 flows back to the first thermal expansion valve 222 again, and the refrigerant temperature is transmitted to the first thermal expansion valve 222, so that the first thermal expansion valve 222 can dynamically adjust the opening according to the superheat at the outlet of the cooler 210, ensuring that the flow of the refrigerant matches the heat dissipation demand of the battery 10. For example, when the superheat is high, it means that the refrigerant evaporates sufficiently in the cooler 210, and the first thermal expansion valve 222 will increase the flow of the refrigerant; when the superheat is low, it means that the refrigerant evaporates insufficiently in the cooler 210, and the first thermal expansion valve 222 will reduce the flow of the refrigerant, ensuring that the thermal management system can always be in the best operating state, improve the refrigeration efficiency, and reduce energy consumption.

[0080] In some embodiments, Figure 1 and Figure 2 As shown, the first valve group further includes a pressure stabilizing valve 223 , and the pressure stabilizing valve 223 is located between the compressor 110 and the cooler 210 .

[0081] It is understandable that in the battery single-open cooling mode and the dual-open cooling mode, the refrigerant flows out of the condenser body 121, passes through the first solenoid valve 221, the first thermal expansion valve 222, the cooler 210 and the pressure-stabilizing valve 223, and then flows back to the compressor 110. That is, the pressure-stabilizing valve 223 dynamically adjusts the opening by obtaining the pressure at the outlet of the cooler 210 in real time, so as to decouple the evaporation temperature at the outlet of the cooler 210 and realize the reasonable distribution of the refrigerant flow, and also reduce the redundancy of the thermal management system.

[0082] In some embodiments, Figure 1 and Figure 2 As shown, a connected compressor 110 and a condenser 120 are provided on the refrigeration main circuit 100, and a second valve group is also provided on the second branch 300. The second valve group is located between the condenser 120 and the evaporator 310, and the second valve group is used to adjust the refrigerant flow of the second branch 300.

[0083] It is understandable that the second valve group is located between the condenser body 121 and the evaporator 310, and can dynamically adjust the refrigerant flow in the second branch 300 according to the actual cooling demand of the passenger compartment, thereby optimizing the cooling effect of the passenger compartment. For example, when the temperature in the passenger compartment is high, the refrigerant flow is increased to quickly reduce the temperature; after the temperature reaches the set value, the refrigerant flow is reduced to maintain a stable temperature to improve the user experience.

[0084] In some embodiments, Figure 1 and Figure 2 As shown, the second valve group includes a second solenoid valve 321 and a second thermal expansion valve 322. The second solenoid valve 321 is located between the condenser 120 and the evaporator 310 and is electrically connected to the controller. The controller is used to control the on-off between the second branch 300 and the refrigeration main circuit 100 based on the second solenoid valve 321; the second thermal expansion valve 322 is located between the second solenoid valve 321 and the evaporator 310.

[0085] It is understandable that the second solenoid valve 321 is located between the condenser body 121 and the evaporator 310, and is electrically connected to the controller, and can realize the connection and disconnection between the second branch 300 and the refrigeration main circuit 100 according to the instructions of the controller, so that the thermal management system can quickly switch the refrigeration mode according to actual needs. For example, in the passenger compartment single refrigeration mode, the controller can open the second solenoid valve 321 to allow the refrigerant to flow into the second branch 300; when the passenger compartment does not need to be refrigerated, the second solenoid valve 321 is closed to cut off the refrigerant from flowing into the second branch 300. Compared with the use of an electronic expansion valve, the second thermal expansion valve 322 can automatically adjust the opening according to the actual needs of the evaporator 310 to adjust the superheat of the refrigerant at the outlet of the evaporator 310 (i.e., the difference between the real-time temperature of the refrigerant and the saturation temperature of the refrigerant), ensuring that the evaporator 310 always obtains an appropriate amount of refrigerant while reducing the difficulty and complexity of control.

[0086] In some embodiments, the first inlet end of the second thermal expansion valve 322 is connected to the outlet end of the second solenoid valve 321 , the outlet end of the second thermal expansion valve 322 is connected to the inlet end of the evaporator 310 , and the second inlet end of the second thermal expansion valve 322 is connected to the outlet end of the evaporator 310 .

[0087] It is understandable that in the passenger compartment single-open cooling mode and double-open cooling mode, the refrigerant flows out from the condenser body 121 and flows back to the compressor 110 after passing through the second solenoid valve 321, the second thermal expansion valve 322, and the evaporator 310 in sequence; at the same time, the refrigerant flowing out of the evaporator 310 flows back to the second thermal expansion valve 322 again, and the refrigerant temperature is transmitted to the second thermal expansion valve 322, so that the second thermal expansion valve 322 can dynamically adjust the opening according to the superheat at the outlet of the evaporator 310, ensuring that the flow of the refrigerant matches the refrigeration demand of the passenger compartment. For example, when the superheat is high, it means that the refrigerant evaporates sufficiently in the evaporator 310, and the second thermal expansion valve 322 will increase the flow of the refrigerant; when the superheat is low, it means that the refrigerant evaporates insufficiently in the evaporator 310, and the second thermal expansion valve 322 will reduce the flow of the refrigerant, ensuring that the thermal management system can always be in the best operating state, improve the refrigeration efficiency, and reduce energy consumption.

[0088] In some embodiments, Figure 1 and Figure 2 As shown, a pressure sensor 130 is provided on the refrigeration main circuit 100 , and the pressure sensor 130 is electrically connected to the controller for obtaining the refrigerant pressure flowing out of the condenser 120 of the refrigeration main circuit 100 . The controller controls the start and stop of the compressor 110 based on the refrigerant pressure obtained by the pressure sensor 130 .

[0089] It is understandable that the pressure sensor 130 is disposed between the condenser body 121 and the compressor 110, and the controller obtains the refrigerant pressure flowing out of the condenser body 121 according to the pressure sensor 130, dynamically controls the start and stop of the compressor 110, optimizes the operating efficiency of the thermal management system, and enhances the reliability and safety of the thermal management system. For example, when the refrigerant pressure is too high or too low, the controller can stop the operation of the compressor 110 to protect the compressor 110.

[0090] The embodiment of the present application further provides an electric device, which includes a battery 10 and the above thermal management system, where the thermal management system is at least used to perform thermal management on the battery 10 .

[0091] It should be noted that the battery cells mentioned in the embodiments of the present application may include lithium-ion secondary batteries 10, lithium-ion primary batteries 10, lithium-sulfur batteries 10, sodium-lithium-ion batteries 10, sodium-ion batteries 10 or magnesium-ion batteries 10, etc., and the embodiments of the present application do not limit this. The battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. The battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0092] The battery 10 mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery 10 mentioned in the present application may include a battery module or a battery pack. The battery 10 generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell.

[0093] It should be noted that electrical equipment includes but is not limited to ships, spacecraft, and vehicles, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.; vehicles may include electric cars or rail trains, etc.

[0094] The electrical equipment provided in the embodiments of the present application reduces manufacturing costs and maintenance costs and meets lightweight requirements.

[0095] An embodiment of the present application also provides a control method for a thermal management system.

[0096] like Figure 3 As shown, the control method of the thermal management system includes steps 610 , 620 and 630 .

[0097] Step 610 : Obtain the current rotation speed of the compressor 110 and the current evaporation temperature of at least one of the cooler 210 and the evaporator 310 .

[0098] Step 620 : Determine a target speed of the compressor 110 based on the current speed of the compressor 110 and the current evaporation temperature of at least one of the cooler 210 and the evaporator 310 .

[0099] Step 630: Control the speed of the compressor 110 according to the target speed.

[0100] It is understandable that when the battery 10 needs to be cooled, the current evaporation temperature of the cooler 210 is obtained in real time according to the first temperature sensor 400, and the target speed of the compressor 110 at the next moment is determined based on the current speed of the compressor 110, so as to adjust the speed of the compressor 110 in real time; when the battery 10 needs to be cooled while the passenger compartment is cooled, the controller obtains the evaporation temperature of the evaporator 310 in real time according to the second temperature sensor 500, and determines the target speed of the compressor 110 at the next moment based on the current speed of the compressor 110, so as to adjust the speed of the compressor 110 in real time. Not only intelligent temperature control is realized, but also the control logic can be made as simple and clear as possible, which reduces the difficulty of development and maintenance, and reduces the complexity and cost of the thermal management system while ensuring the cooling performance of the thermal management system.

[0101] The control method of the thermal management system provided in the embodiment of the present application is not only easy to control, but also can improve the control accuracy and responsiveness.

[0102] In some embodiments, in the battery single cooling mode, step 610 includes: obtaining the current speed of the compressor 110 and the current evaporation temperature T of the cooler 210 cp Step 620 includes:

[0103] At the evaporation temperature T cp Greater than the first preset evaporation temperature T s21 In the case of , the target speed is equal to the current speed plus the first preset value;

[0104] At the evaporation temperature T cp Equal to the first preset evaporation temperature T s21 In the case of , the target speed is equal to the current speed;

[0105] At the evaporation temperature T cp Less than the first preset evaporation temperature T s21 In the case of, the target speed is equal to the current speed minus the first preset value. It should be noted that the first preset evaporation temperature T s21 The specific sizes of the first preset values ​​can be adjusted according to actual needs, and this embodiment does not impose any specific restrictions on this.

[0106] It is understandable that the evaporation temperature T detected by the first temperature sensor 400 is continuously collected by the battery monitoring and management system (BMS). cp , if the evaporation temperature T cp <First preset evaporation temperature T s21 , then reduce the speed of the compressor 110, otherwise increase the speed of the compressor 110 until the evaporation temperature T cp Adjust to the first preset evaporation temperature T s21 nearby, thereby optimizing the performance and life of the battery 10 and improving the energy efficiency and stability of the thermal management system.

[0107] In some embodiments, in the dual-open cooling mode, step 610 includes: obtaining the current speed of the compressor 110 and the current evaporation temperature T of the evaporator 310. evap ; Step 620 includes:.

[0108] At the evaporation temperature T evap Greater than the second preset evaporation temperature T s22 In the case of , the target speed is equal to the current speed plus the second preset value;

[0109] At the evaporation temperature T evap Equal to the second preset evaporation temperature T s22In the case of , the target speed is equal to the current speed;

[0110] At the evaporation temperature T evap Less than the second preset evaporation temperature T s22 In the case of, the target speed is equal to the current speed minus the second preset value. It should be noted that the second preset evaporation temperature T s22 The specific sizes of the second preset values ​​can be adjusted according to actual needs, and this embodiment does not impose any specific restrictions on this.

[0111] It is understandable that the evaporation temperature T detected by the second temperature sensor 500 is continuously collected by the vehicle control unit (VCU). evap , if the evaporation temperature T evap <Second preset evaporation temperature T s22 , then reduce the speed of the compressor 110, otherwise increase the speed of the compressor 110 until the evaporation temperature T evap Adjust to the second preset evaporation temperature T s22 nearby, thereby ensuring that the passenger compartment is always within a comfortable temperature range while optimizing the performance and life of the battery 10 and improving the energy efficiency and stability of the thermal management system.

[0112] In some embodiments, before step 610, the method further includes:

[0113] Get the current temperature T of the battery 10 max ;

[0114] At the current temperature T of the battery 10 max Not greater than the temperature threshold T s11 In the case of, the first solenoid valve 221 is opened. It should be noted that the temperature threshold T s11 The specific size can be adjusted according to actual needs, and this embodiment does not impose any specific limitation on this.

[0115] It can be understood that, regardless of whether there is a need to cool the passenger compartment, at the current temperature T of the battery 10 max ≤Temperature threshold T s11 In the case of , the first branch 200 is connected to the cooling main circuit 100 to ensure that the battery 10 is always within a suitable operating temperature range, thereby optimizing the performance and life of the battery 10. This control strategy can not only improve the safety and reliability of the battery 10, but also indirectly improve the operating efficiency and user experience of the electrical equipment.

[0116] The control method of the thermal management system provided in the embodiment of the present application can be executed by the control device of the thermal management system. In the embodiment of the present application, the control device of the thermal management system executing the control method of the thermal management system is taken as an example to illustrate the control device of the thermal management system provided in the embodiment of the present application.

[0117] An embodiment of the present application also provides a control device for a thermal management system.

[0118] like Figure 4 As shown, the control device of the thermal management system includes an acquisition module 710, a processing module 720 and an execution module 730. The acquisition module 710 is used to obtain the current speed of the compressor 110 and the current evaporation temperature of at least one of the cooler 210 and the evaporator 310; the processing module 720 is used to determine the target speed of the compressor 110 based on the current speed of the compressor 110 and the current evaporation temperature of at least one of the cooler 210 and the evaporator 310; the execution module 730 is used to control the speed of the compressor 110 according to the target speed.

[0119] The control device of the thermal management system provided in the embodiment of the present application is not only easy to control, but also can improve the control accuracy and responsiveness of the thermal management system.

[0120] The control device of the thermal management system in the embodiment of the present application can be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices other than a terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and can also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0121] The control device of the thermal management system in the embodiment of the present application may be a device having an operating system. The operating system may be a Microsoft (Windows) operating system, an Android (Android) operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0122] The control device of the thermal management system provided in the embodiment of the present application can achieve Figure 3 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0123] In some embodiments, Figure 5 As shown, an embodiment of the present application also provides an electronic device 800, including a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the program is executed by the processor 801, each process of the control method embodiment of the above-mentioned thermal management system is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0124] It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

[0125] An embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the control method embodiment of the above-mentioned thermal management system are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0126] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0127] An embodiment of the present application also provides a computer program product, including a computer program, which implements the control method of the thermal management system when executed by a processor.

[0128] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0129] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the control method embodiment of the above-mentioned thermal management system, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0130] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0131] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0132] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0133] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0134] In the description of the present application, “plurality” means two or more.

[0135] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0136] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0138] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A thermal management system, characterized in that: include: Refrigeration main circuit (100); A first branch circuit (200) connected to the refrigeration main circuit (100), wherein the first branch circuit (200) is provided with a cooler (210) for performing heat exchange with the battery (10); A second branch (300) connected in parallel with the first branch (200), wherein the second branch (300) is provided with an evaporator (310); a first temperature sensor (400) for detecting an evaporation temperature of the cooler (210); a second temperature sensor (500), used for detecting the evaporation temperature of the evaporator (310); A controller is electrically connected to the compressor (110) of the main refrigeration circuit (100), the first temperature sensor (400) and the second temperature sensor (500), respectively, and the controller is used to adjust the rotation speed of the compressor (110) based on at least one of the first temperature sensor (400) and the second temperature sensor (500).

2. The thermal management system according to claim 1, characterized in that: The thermal management system has a battery single-open cooling mode and a dual-open cooling mode, wherein: In the battery single-open cooling mode, the first branch circuit (200) is connected to the cooling main circuit (100), and the controller adjusts the rotation speed of the compressor (110) based on the evaporation temperature of the cooler (210); In the dual-open refrigeration mode, the first branch (200) and the second branch (300) are respectively connected to the refrigeration main circuit (100), and the controller adjusts the rotation speed of the compressor (110) based on the evaporation temperature of the evaporator (310).

3. The thermal management system according to claim 1 or 2, characterized in that: The main refrigeration circuit (100) is provided with a connected compressor (110) and a condenser (120), and the first branch circuit (200) is also provided with a first valve group, wherein the first valve group is at least partially located between the condenser (120) and the cooler (210), and the first valve group is used to adjust the refrigerant flow of the first branch circuit (200).

4. The thermal management system according to claim 3, characterized in that: The first valve group comprises: a first solenoid valve (221), located between the condenser (120) and the cooler (210), and electrically connected to the controller, wherein the controller is used to control the on / off of the first branch circuit (200) and the refrigeration main circuit (100) based on the first solenoid valve (221); A first thermal expansion valve (222) is located between the first solenoid valve (221) and the cooler (210).

5. The thermal management system according to claim 4, characterized in that: The first inlet end of the first thermal expansion valve (222) is connected to the outlet end of the first solenoid valve (221), the outlet end of the first thermal expansion valve (222) is connected to the inlet end of the cooler (210), and the second inlet end of the first thermal expansion valve (222) is connected to the outlet end of the cooler (210).

6. The thermal management system according to claim 4, characterized in that: The first valve group further comprises: A pressure stabilizing valve (223) is located between the compressor (110) and the cooler (210).

7. The thermal management system according to claim 1 or 2, characterized in that: The main refrigeration circuit (100) is provided with a connected compressor (110) and a condenser (120), and the second branch circuit (300) is also provided with a second valve group, the second valve group is located between the condenser (120) and the evaporator (310), and the second valve group is used to adjust the refrigerant flow of the second branch circuit (300).

8. The thermal management system according to claim 7, characterized in that: The second valve group comprises: a second solenoid valve (321), located between the condenser (120) and the evaporator (310), and electrically connected to the controller, wherein the controller is used to control the connection and disconnection between the second branch circuit (300) and the refrigeration main circuit (100) based on the second solenoid valve (321); The second thermal expansion valve (322) is located between the second solenoid valve (321) and the evaporator (310).

9. The thermal management system according to claim 1 or 2, characterized in that: A pressure sensor (130) is provided on the main refrigeration circuit (100). The pressure sensor (130) is electrically connected to the controller and is used to obtain the refrigerant pressure flowing out of the condenser (120) of the main refrigeration circuit (100). The controller controls the start and stop of the compressor (110) based on the refrigerant pressure obtained by the pressure sensor (130).

10. An electrical device, characterized in that: include: a battery (10), and The thermal management system according to any one of claims 1 to 9, wherein the thermal management system is at least used to perform thermal management on the battery (10).

11. A control method using a thermal management system according to any one of claims 1 to 9, characterized in that: include: Obtaining a current rotation speed of the compressor (110) and a current evaporation temperature of at least one of the cooler (210) and the evaporator (310); Determining a target speed of the compressor (110) based on a current speed of the compressor (110) and a current evaporation temperature of at least one of a cooler (210) and an evaporator (310); The rotation speed of the compressor (110) is controlled according to the target rotation speed.

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