Automobile thermal management system and automobile

Abstract

The application provides an automobile thermal management system and an automobile. The automobile thermal management system comprises a compressor, a condenser, a cooler, a battery assembly, the compressor, the condenser and the cooler are sequentially communicated and form a first heat exchange circuit; the condenser is communicated with the battery assembly and forms a second heat exchange circuit; the condenser is used for heat exchanging the first heat exchange medium and the second heat exchange medium, so that the second heat exchange medium heats the battery assembly; the automobile thermal management system further comprises a preheating control valve and a preheating branch, the preheating control valve is arranged in the second heat exchange circuit, the preheating branch is connected with the battery assembly; the battery assembly comprises a plurality of battery cells, when the temperature difference between the plurality of battery cells exceeds a temperature difference threshold, the preheating control valve is controlled, the battery assembly is cut off from the second heat exchange circuit, the preheating branch is controlled, the battery assembly is communicated with the preheating branch and forms a battery preheating circuit, and the plurality of battery cells are preheated through the battery preheating circuit. The service life is prolonged, and the battery capacity and output power are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to an automobile thermal management system and an automobile. BACKGROUND

[0002] With the rapid development of the automobile industry and people's demand for low energy consumption, high efficiency and environmental protection, automobile heat exchange technology is also constantly innovating and developing. In order to enable the automobile to operate efficiently and reliably, the thermal management system is also extremely important. In the related art, the battery assembly includes multiple battery cells. Due to the differences in heat transfer and heat dissipation effects between the multiple battery cells, it is easy to cause some battery cells to have excessively high temperatures, while other battery cells have excessively low temperatures, thereby affecting the performance and service life of the entire battery assembly and affecting the vehicle's cruising range. SUMMARY

[0003] The present application provides an automobile thermal management system and an automobile for uniformly distributing the temperatures of multiple battery cells of a battery assembly.

[0004] The present application provides an automobile thermal management system, comprising: a compressor, a condenser, a cooler, and a battery assembly, the compressor, the condenser, and the cooler are sequentially communicated and form a first heat exchange circuit, and the first heat exchange circuit is filled with a first heat exchange medium; the condenser and the battery assembly are communicated and form a second heat exchange circuit, and the second heat exchange circuit is filled with a second heat exchange medium; the condenser is used for heat exchange between the first heat exchange medium and the second heat exchange medium, so that the second heat exchange medium heats the battery assembly; wherein the first heat exchange medium is a refrigeration medium, and the second heat exchange medium is a cooling medium; the automobile thermal management system further comprises a preheating control valve and a preheating branch, the preheating control valve is arranged in the second heat exchange circuit, the preheating branch is connected with the battery assembly; the battery assembly includes multiple battery cells, when the temperature difference between the multiple battery cells exceeds a temperature difference threshold, the preheating control valve is controlled to cut off the battery assembly and the second heat exchange circuit, and the preheating branch is controlled to communicate the battery assembly and the preheating branch and form a battery preheating circuit, and the multiple battery cells are preheated through the battery preheating circuit.

[0005] Optionally, the automobile thermal management system further comprises a heater core arranged in a passenger compartment of the automobile; the automobile thermal management system further comprises a controller connected with the preheating control valve; the preheating control valve comprises a first control end, a second control end, and a third control end, the first control end is connected with the condenser, the second control end is connected with the heater core, and the third control end is connected with the battery assembly;

[0006] Optionally, when the temperature difference between the plurality of battery cells exceeds a temperature difference threshold, the controller controls the third control end to be closed, and controls the preheating branch to be in communication with the plurality of battery cells and form the battery preheating loop.

[0007] Optionally, the controller controls the second control end to be closed, and controls the warm air core to stop heating.

[0008] Optionally, the preheating branch comprises a preheating pipeline and a preheating on-off valve arranged in the preheating pipeline, and the preheating on-off valve is connected with the controller; when the temperature difference between the plurality of battery cells exceeds a temperature difference threshold, the controller controls the third control end to be closed, and controls the preheating on-off valve to be opened, so that the plurality of battery cells are in communication with the preheating branch and form the battery preheating loop.

[0009] Optionally, the preheating control valve comprises a three-way valve.

[0010] Optionally, the preheating on-off valve comprises a one-way valve.

[0011] Optionally, the automobile thermal management system further comprises a first battery temperature sensor, a second battery temperature sensor and a controller, the controller is connected with the first battery temperature sensor and the second battery temperature sensor respectively, and the first battery temperature sensor and the second battery temperature sensor are located upstream and downstream of the plurality of battery cells respectively; wherein the first battery temperature sensor is used for detecting the temperature of the second heat exchange medium entering the battery assembly and outputting a first battery signal; the second battery temperature sensor is used for detecting the temperature of the second heat exchange medium flowing out of the battery assembly and outputting a second battery signal; and the controller is used for determining the temperature difference between the plurality of battery cells according to the first battery signal and the second battery signal, and controlling the preheating control valve and the preheating branch when the temperature difference between the plurality of battery cells exceeds a temperature difference threshold.

[0012] Optionally, the automobile thermal management system further comprises a heating assembly arranged in the second heat exchange loop, and the heating assembly is used for heating the second heat exchange medium in the second heat exchange loop.

[0013] Optionally, the automobile thermal management system further comprises a first power assembly, and the first power assembly is arranged in the second heat exchange loop and located upstream of the condenser.

[0014] Optionally, the automobile thermal management system further comprises a second power assembly, and the second power assembly is arranged in the second heat exchange loop and located upstream of the battery assembly.

[0015] Optionally, the automobile thermal management system further comprises an electric machine assembly, and the cooler is in communication with the electric machine assembly and forms a third heat exchange loop.

[0016] Optionally, the third heat exchange loop is filled with a third heat exchange medium, and the cooler is configured to perform heat exchange between the first heat exchange medium and the third heat exchange medium, so that the third heat exchange medium cools the motor assembly; and the third heat exchange medium is a cooling medium.

[0017] Optionally, the automobile thermal management system further comprises a third power assembly disposed in the third heat exchange loop.

[0018] Optionally, the automobile thermal management system further comprises a bypass branch connected between the inlet and the outlet of the compressor.

[0019] Optionally, the bypass branch comprises a bypass pipeline and a bypass switch valve disposed in the bypass pipeline; the bypass pipeline is connected between the inlet and the outlet of the compressor, and the bypass switch valve is configured to control the opening and closing of the bypass pipeline to control the opening and closing of the inlet and the outlet of the compressor.

[0020] The application further provides an automobile comprising the automobile thermal management system according to any one of the above embodiments.

[0021] The automobile thermal management system and the automobile according to the embodiments of the application. The automobile thermal management system is configured to set a preheating control valve in the second heat exchange loop and set a preheating branch connected with the battery assembly. When the temperature difference between the plurality of battery cells exceeds a temperature difference threshold, the preheating control valve is controlled to disconnect the battery assembly from the second heat exchange loop and connect the battery assembly with the preheating branch to form a battery preheating loop, and the plurality of battery cells are preheated through the battery preheating loop. In this way, the temperature of the plurality of battery cells is uniform, the service life of the battery assembly is prolonged, the battery capacity and output power of the battery assembly are improved, the risk of battery failure is reduced, the service life of the vehicle is prolonged, the performance and cruising range of the vehicle are improved, the risk of vehicle failure is reduced, and the maintenance cost is reduced.

[0022] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0024] Figure 1 A schematic diagram of one state of the automobile thermal management system according to the application is shown.

[0025] Figure 2 A schematic diagram of one state of the automobile thermal management system according to the application is shown. Figure 1A principle block diagram of another state of the automotive thermal management system shown.

[0026] Figure 3 A principle block diagram of another state of the automotive thermal management system shown. Figure 1 A principle block diagram of another state of the automotive thermal management system shown. DETAILED DESCRIPTION

[0027] Example embodiments will be described in detail herein with reference to the attached drawings. The description below refers to the accompanying drawings, which show examples by which aspects of the present application can be implemented. The following detailed description includes specific details for the purpose of providing an understanding of the various examples. However, it will be apparent to those skilled in the art that the application can be practiced without these specific details. In some instances, well-known structures and components are not described in detail in order to avoid obscuring aspects of the application. The following examples are not intended to limit the scope of the application, as this scope is defined by the appended claims.

[0028] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical terms or scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art. The use of the terms "first", "second", and the like does not imply any order or precedence, but is simply used to distinguish one element from another. Also, the use of the terms "a" and "an" do not limit the quantity to one, but rather means "one or more". The use of the term "another" means "at least a second" or "at least a third". The use of the term "another" and "at least one" are taken to mean "one or more than one". The use of the term "or" in the context of "A / B" or "A / B / C" means "A, B, or C", but not "A / B / C". The use of the term "about" means "approximately", "around", or "at or near". The use of the term "based on" means "based, at least in part, on". The use of the term "comprises" means "comprises, and possibly includes, other components". The use of the term "connected" means "directly or indirectly connected". The use of the term "coupled" means "directly or indirectly connected".

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical terms or scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art. The use of the terms "first", "second", and the like does not imply any order or precedence, but is simply used to distinguish one element from another. Also, the use of the terms "a" and "an" do not limit the quantity to one, but rather means "one or more". The use of the term "another" means "at least a second" or "at least a third". The use of the term "another" and "at least one" are taken to mean "one or more than one". The use of the term "or" in the context of "A / B" or "A / B / C" means "A, B, or C", but not "A / B / C". The use of the term "about" means "approximately", "around", or "at or near". The use of the term "based on" means "based, at least in part, on". The use of the term "comprises" means "comprises, and possibly includes, other components". The use of the term "connected" means "directly or indirectly connected". The use of the term "coupled" means "directly or indirectly connected".

[0030] The application provides an automobile thermal management system, comprising: a compressor, a condenser, a cooler, a battery assembly, the compressor, the condenser and the cooler are sequentially communicated and form a first heat exchange circuit, the first heat exchange circuit is filled with a first heat exchange medium; the condenser and the battery assembly are communicated and form a second heat exchange circuit, the second heat exchange circuit is filled with a second heat exchange medium; the condenser is used for heat exchange of the first heat exchange medium and the second heat exchange medium, so that the second heat exchange medium heats the battery assembly; wherein the first heat exchange medium is refrigeration medium, and the second heat exchange medium is cooling medium; the automobile thermal management system further comprises a preheating control valve and a preheating branch, the preheating control valve is arranged in the second heat exchange circuit, and the preheating branch is connected with the battery assembly; the battery assembly comprises a plurality of battery cells, when a temperature difference between the plurality of battery cells exceeds a temperature difference threshold, the preheating control valve is controlled, the battery assembly is cut off from the second heat exchange circuit, and the preheating branch is controlled, so that the battery assembly is communicated with the preheating branch and forms a battery preheating circuit, and the plurality of battery cells are preheated through the battery preheating circuit.

[0031] The automobile thermal management system and the automobile of the application. The automobile thermal management system is provided with a preheating control valve and a preheating branch, the preheating control valve is arranged in the second heat exchange circuit, the preheating branch is connected with the battery assembly, when a temperature difference between a plurality of battery cells of the battery assembly exceeds a temperature difference threshold, the preheating control valve is controlled, the battery assembly is cut off from the second heat exchange circuit, and the preheating branch is communicated and forms a battery preheating circuit, and the plurality of battery cells are preheated through the battery preheating circuit. In this way, the temperature of the plurality of battery cells of the battery assembly is uniform, the service life of the battery assembly is prolonged, the battery capacity and output power of the battery assembly are improved, the risk of battery failure is reduced, the service life of the whole vehicle is prolonged, the performance and cruising range of the whole vehicle are improved, the risk of failure of the whole vehicle is reduced, and the maintenance cost is reduced.

[0032] The automobile comprises the automobile thermal management system. The automobile comprises a plurality of working modes. The working modes comprise one or more combinations of an air conditioning heating mode, a battery heating mode, a battery preheating mode, an air conditioning refrigeration mode, a battery cooling mode, a motor cooling mode and a dehumidification mode. The automobile thermal management system is used for controlling the working mode of one or more combinations to operate.

[0033] Figure 1 A principle block diagram of one state of the automobile thermal management system 1 of the application is shown. Figure 2 A principle block diagram of another state of the automobile thermal management system 1 is shown. Figure 1 A principle block diagram of another state of the automobile thermal management system 1 is shown. As shown in Figure 1 As shown, the automobile thermal management system 1 comprises a compressor 101, a condenser 102, a cooler 103, a battery assembly 105, a heating assembly 106, a heater core 107 and a motor assembly 108. In the embodiment shown, the automobile thermal management system 1 is used for realizing an air conditioning heating mode, a battery preheating mode, a battery heating mode and a motor cooling mode. Figure 1 As shown in the embodiment, the automobile thermal management system 1 is used for realizing an air conditioning heating mode, a battery preheating mode, a battery heating mode and a motor cooling mode.

[0034] In Figure 1 and Figure 2 the embodiment shown, the compressor 101, the condenser 102 and the cooler 103 are connected in sequence and form a first heat exchange circuit 11, the first heat exchange circuit 11 is filled with a first heat exchange medium, and the first heat exchange medium is a refrigeration medium. The condenser 102 and the battery assembly 105 are connected and form a second heat exchange circuit 12, the second heat exchange circuit 12 is filled with a second heat exchange medium, and the second heat exchange medium is a cooling medium. The condenser 102 is used for heat exchange between the first heat exchange medium and the second heat exchange medium, and the second heat exchange medium is heated by the heating assembly 106 to heat the battery assembly 105. In this embodiment, the condenser 102 can be a water-cooled condenser. The compressor 101 compresses the first heat exchange medium (refrigeration medium) to output high-temperature and high-pressure gas, which passes through the condenser 102, and the condenser 102 condenses and dissipates heat to output high-temperature and high-pressure refrigeration liquid. At this time, the heat of the first heat exchange medium (refrigeration medium) is taken away by the second heat exchange medium (cooling medium), so that the temperature of the second heat exchange medium (cooling medium) is increased, and the second heat exchange medium (cooling medium) circulates in the second heat exchange circuit 12 to heat the battery assembly 105, thereby realizing the battery heating function.

[0035] In Figure 1 and Figure 2 the embodiment shown, the automobile thermal management system 1 further includes a preheating control valve 109 and a preheating branch 110. The preheating control valve 109 is arranged in the second heat exchange circuit 12, and the preheating control valve 109 can control the on-off of the second heat exchange circuit 12. The preheating branch 110 is connected with the battery assembly 105. In this embodiment, the battery assembly 105 includes a plurality of battery cells (not shown). The plurality of battery cells can have a non-uniform temperature, and when the temperature difference between the plurality of battery cells exceeds a temperature difference threshold, the preheating control valve 109 is controlled to disconnect the battery assembly 105 from the second heat exchange circuit 12, and the preheating branch 110 is controlled to connect the battery assembly 105 with the preheating branch 110 to form a battery preheating circuit 13 (as shown in Figure 2 ), and the plurality of battery cells are preheated through the battery preheating circuit 13, thereby realizing the battery preheating function. In this embodiment, the temperature difference between the plurality of battery cells cannot exceed 8°-10°. The temperature difference threshold can be 8°, 9° or 10°, which is not limited in the present application.

[0036] The automobile thermal management system 1 sets the preheating control valve 109 in the second heat exchange circuit 12 and the preheating branch 110 connected with the battery assembly 105. When the temperature difference between the multiple battery cells of the battery assembly 105 exceeds the temperature difference threshold, the preheating control valve 109 is controlled to cut off the second heat exchange circuit 12 and the preheating branch 110 is controlled to make the battery assembly 105 communicate with the preheating branch 110 and form the battery preheating circuit 13, so that the multiple battery cells are preheated through the battery preheating circuit 13. In this way, the temperature of the multiple battery cells of the battery assembly 105 is uniform, the service life of the battery assembly 105 is prolonged, the battery capacity and output power of the battery assembly 105 are improved, the risk of battery failure is reduced, the service life of the whole vehicle is prolonged, the performance and cruising range of the whole vehicle are improved, the risk of failure of the whole vehicle is reduced, and the maintenance cost is reduced.

[0037] Figure 3 The automobile thermal management system is shown in the control principle block diagram. The automobile thermal management system is combined with the automobile thermal management system 1. Figure 1 The automobile thermal management system is shown in the control principle block diagram. The automobile thermal management system is combined with the automobile thermal management system 1. Figures 1 to 3 As shown, the preheating control valve 109 can be an electronic preheating control valve. The automobile thermal management system 1 further includes a controller 123 connected with the preheating control valve 109. In the automobile thermal management system 1, Figure 1 and Figure 2In the embodiment shown, the automobile thermal management system 1 further comprises a first battery temperature sensor 111 and a second battery temperature sensor 112, and the controller 123 is connected with the first battery temperature sensor 111 and the second battery temperature sensor 112 respectively. The first battery temperature sensor 111 and the second battery temperature sensor 112 are located upstream and downstream of the battery assembly 105 respectively. The first battery temperature sensor 111 is used to detect the temperature of the second heat exchange medium (cooling medium) entering the battery assembly 105 and output a first battery signal. The second battery temperature sensor 112 is used to detect the temperature of the second heat exchange medium (cooling medium) flowing out of the battery assembly 105 and output a second battery signal. The controller 123 is used to determine the temperature difference between the plurality of battery cells according to the first battery signal and the second battery signal, and control the preheating control valve 109 and the preheating branch 110 when the temperature difference between the plurality of battery cells exceeds the temperature difference threshold. In this process, the controller 123 determines the temperature difference between the battery cells at the two ends of the plurality of battery cells according to the first battery signal and the second battery signal, and controls the preheating control valve 109 to cut off the battery assembly 105 from the second heat exchange circuit 12 and controls the preheating branch 110 to communicate the battery assembly 105 with the preheating branch 110 to form a battery preheating circuit 13 when the temperature difference between the battery cells at the two ends of the plurality of battery cells exceeds 8° or 9° or 10°. The plurality of battery cells are preheated through the battery preheating circuit 13, so that the temperature of the plurality of battery cells of the battery assembly 105 is uniform, thereby prolonging the service life of the battery assembly 105, improving the battery capacity and output power of the battery assembly 105, and reducing the risk of battery failure.

[0038] In Figure 1 and Figure 2 In the embodiment shown, the heater core 107 is arranged in the second heat exchange circuit 12 and located in the passenger compartment 2 of the automobile. Arranging the heater core 107 in the second heat exchange circuit 12 can heat the heater core 107 with the second heat exchange medium (cooling medium) with increased temperature, and arranging the heater core 107 in the passenger compartment 2 of the automobile can heat the passenger compartment 2 with the heater core 107 when the passenger compartment needs to be heated, thereby realizing the air conditioning heating function.

[0039] In Figures 1 to 3In the illustrated embodiment, the preheating control valve 109 includes a first control end 1091, a second control end 1092 and a third control end 1093. The first control end 1091 is connected to the condenser 102, the second control end 1092 is connected to the heating core 107, and the third control end 1093 is connected to the battery assembly 105. In some embodiments, when the temperature difference between the plurality of battery cells exceeds the temperature difference threshold, the controller 123 controls the third control end 1093 to be closed, and controls the preheating branch 110 to be in communication with the plurality of battery cells and form the battery preheating loop 13. In some embodiments, the controller 123 controls the second control end 1092 to be closed, and controls the heating core 107 to stop heating.

[0040] In Figures 1 to 3 In the illustrated embodiment, the preheating branch 110 includes a preheating pipeline 113 and a preheating switch valve 114 arranged in the preheating pipeline 113. The preheating switch valve 114 can be an electronic switch valve and is connected to the controller 123. When the temperature difference between the plurality of battery cells exceeds the temperature difference threshold, the controller 123 controls the third control end 1093 to be closed, and controls the preheating switch valve 114 to be opened, so that the plurality of battery cells of the battery assembly 105 are in communication with the preheating branch 110 and form the battery preheating loop 13 (as shown in Figure 2 By using the preheating control valve 109 and the preheating switch valve 114 together, the plurality of battery cells of the battery assembly 105 can form the battery preheating loop 13 with the preheating branch 110, so as to ensure the temperature uniformity between the plurality of battery cells of the battery assembly 105, prolong the service life of the battery assembly 105, improve the battery capacity and output power of the battery assembly 105, and reduce the risk of battery failure.

[0041] In some embodiments, the preheating control valve 109 includes a three-way valve. In some embodiments, the preheating switch valve 114 includes a one-way valve. By using the three-way valve and the one-way valve together, the plurality of battery cells of the battery assembly 105 can form the battery preheating loop 13 with the preheating branch 110, and the structure is simple and easy to operate.

[0042] In Figure 1 and Figure 2 In the illustrated embodiment, the heating assembly 106 is arranged in the second heat exchange loop 12, and the heating assembly 106 is used to heat the second heat exchange medium in the second heat exchange loop 12. By arranging the heating assembly 106, the temperature of the second heat exchange medium in the second heat exchange loop 12 is higher, which can heat the heating core 107 and improve the temperature of the passenger cabin 2.

[0043] In Figure 1 and Figure 2In the embodiment shown, the cooler 103 is in communication with the motor assembly 108 and forms a third heat exchange loop 14. The third heat exchange loop 14 is filled with a third heat exchange medium, which is a cooling medium. The cooler 103 is used to exchange heat between the first heat exchange medium and the third heat exchange medium, so that the third heat exchange medium cools the motor assembly 108. In this embodiment, the cooler 103 can be a water-cooled cooler.

[0044] The compressor 101 compresses the first heat exchange medium (refrigerant medium) into high-temperature and high-pressure gas, which passes through the condenser 102, which condenses and dissipates heat, and outputs high-temperature and high-pressure refrigerant liquid. Then it passes through the cooler 103, which can act as an evaporator to absorb heat and cool down, and outputs low-temperature and low-pressure liquid. During the operation of the vehicle, the motor assembly 108 is always in working condition, and the motor assembly 108 generates a large amount of heat. The first heat exchange medium (low-temperature and low-pressure refrigerant liquid) output by the cooler 103 exchanges heat with the third heat exchange medium (cooling medium), and the temperature of the third heat exchange medium (cooling medium) decreases to cool the motor assembly 108, thereby achieving the function of motor cooling, prolonging the service life of the motor assembly 108, and reducing the risk of failure of the motor assembly 108.

[0045] In this way, by setting the first heat exchange loop 11, the second heat exchange loop 12 and the third heat exchange loop 14, not only can the heating of the cabin 2 be achieved, but also the preheating of the battery assembly 105 can be achieved, and when the temperature difference between the multiple battery cells of the battery assembly 105 does not exceed the temperature difference threshold, the heating of the battery assembly 105 can be maintained, and the cooling of the motor assembly 108 can be achieved, thereby prolonging the service life of the vehicle, improving the performance and range of the vehicle, reducing the risk of failure of the vehicle, and thus reducing the maintenance cost.

[0046] In Figure 1 and Figure 2 In the embodiment shown, the vehicle thermal management system 1 further comprises a first power assembly 115, which is arranged in the second heat exchange loop 12 and located upstream of the condenser 102. In this embodiment, the first power assembly 115 can be a heater water pump. The first power assembly 115 can provide driving force to make the second heat exchange medium (cooling medium) circulate in the second heat exchange loop 12, so that the temperature of the second heat exchange medium (cooling medium) in the second heat exchange loop 12 is uniform.

[0047] In Figure 1 and Figure 2In the illustrated embodiment, the automobile thermal management system 1 further comprises a second power component 116, which is arranged in the second heat exchange circuit 12 and upstream of the battery assembly 105. In the present embodiment, the second power component 116 can be a battery water pump. The second power component 116 can provide driving force to enable circulation of the second heat exchange medium (cooling medium) in the second heat exchange circuit 12, thereby homogenizing the temperature of the second heat exchange medium (cooling medium) in the second heat exchange circuit 12, and to enable circulation of the second heat exchange medium (cooling medium) in the battery preheating circuit 13, thereby homogenizing the temperature of the second heat exchange medium (cooling medium) in the battery preheating circuit 13, and thereby homogenizing the temperature of the plurality of battery cells of the battery assembly 105.

[0048] In Figure 1 and Figure 2 In the illustrated embodiment, the automobile thermal management system 1 further comprises a third power component 117. The third power component 117 is arranged in the third heat exchange circuit 14. In the present embodiment, the third power component 117 can be a motor water pump. The third power component 117 can provide driving force to enable circulation of the third heat exchange medium (cooling medium) in the third heat exchange circuit 14, thereby homogenizing the temperature of the third heat exchange medium (cooling medium) in the third heat exchange circuit 14.

[0049] In Figure 1 In the illustrated embodiment, when the temperature difference between the plurality of battery cells of the battery assembly 105 does not exceed the temperature difference threshold, the preheating branch 110 is disconnected, and the first control end 1091, the second control end 1092, and the third control end 1093 of the preheating control valve 109 are all turned on. At this time, the battery assembly 105 is in communication with the condenser 102 and is heated by the second heat exchange medium (cooling medium) in the second heat exchange circuit 12. The heater core 107 is also in communication with the condenser 102 and is heated by the second heat exchange medium (cooling medium) in the second heat exchange circuit 12.

[0050] Figure 2 In the illustrated embodiment, when the temperature difference between the plurality of battery cells of the battery assembly 105 exceeds the temperature difference threshold, the preheating switch valve 114 is turned on, and the third control end 1093 of the preheating control valve 109 is turned off. At this time, the battery assembly 105 is in communication with the preheating branch 110 and forms the battery preheating circuit 13 with the preheating branch 110. The plurality of battery cells of the battery assembly 105 are preheated by the battery preheating circuit 13, thereby realizing the battery preheating function. At the same time, the heater core 107 is in communication with the condenser 102 and is heated by the second heat exchange medium (cooling medium) in the second heat exchange circuit 12.

[0051] In Figures 1 to 3In the illustrated embodiment, after the automobile thermal management system 1 is started, the first control end 1091, the second control end 1092 and the third control end 1093 of the preheating control valve 109 are all turned on, and the preheating switch valve 114 is turned off. At this time, the battery assembly 105 starts to be heated through the second heat exchange circuit 12. After a preset heating period, when the temperature difference between the multiple battery cells of the battery assembly 105 exceeds the temperature difference threshold, the preheating switch valve 114 is turned on, and the third control end 1093 of the preheating control valve 109 is turned off. At this time, the battery assembly 105 is in communication with the preheating branch 110, and an electric battery preheating circuit 13 is formed. The multiple battery cells of the battery assembly 105 are preheated through the electric battery preheating circuit 13. Meanwhile, the heater core 107 is in communication with the condenser 102, and is heated by the second heat exchange medium (cooling medium) in the second heat exchange circuit 12. After a period of preheating, when the temperature difference between the multiple battery cells of the battery assembly 105 is uniform and does not exceed the temperature difference threshold, the preheating switch valve 114 is turned off, and the third control end 1093 of the preheating control valve 109 is turned on. At this time, the battery assembly 105 is again in communication with the condenser 102, and is heated by the second heat exchange medium (cooling medium) in the second heat exchange circuit 12. Meanwhile, the heater core 107 is also in communication with the condenser 102, and is heated by the second heat exchange medium (cooling medium) in the second heat exchange circuit 12. In this way, the temperature of the multiple battery cells of the battery assembly 105 can be uniform, the service life of the battery assembly 105 can be prolonged, the battery capacity and output power of the battery assembly 105 can be improved, the risk of battery failure can be reduced, the service life of the vehicle can be prolonged, the performance and cruising range of the vehicle can be improved, the risk of vehicle failure can be reduced, and the maintenance cost can be reduced.

[0052] In Figure 1 and Figure 2In the illustrated embodiment, the compressor 101 includes a compressor inlet 1011 and a compressor outlet 1012. The automobile thermal management system 1 further includes a bypass branch 118 connected between the inlet and the outlet of the compressor 101. The bypass branch 118 is connected between the compressor inlet 1011 and the compressor outlet 1012. When the outside temperature reaches the low-temperature threshold, the bypass branch 118 is connected to the compressor inlet 1011 and the compressor outlet 1012 to start the compressor 101. When the outside temperature is low, the refrigerant is often in a liquid or supercooled state, and its flowability and vaporization capacity are poor, reducing the efficiency of the compressor 101 startup. Therefore, by providing a bypass branch 118 between the inlet and outlet of the compressor 101, the high-temperature and high-pressure gas at the compressor outlet 1012 is introduced to the compressor inlet 1011 through the bypass branch 118, which can effectively help the compressor 101 start in a low-temperature environment, quickly increase the speed of the compressor 101 in an extremely low temperature, and provide more heat for the automobile thermal management system 1. It can be ensured that the compressor 101 can start at an extremely low temperature of -35°C, and the performance can reach 8-10KW energy. The embodiment can also add a drying bottle after the condenser 102 to realize the bypass branch 118 overheating control of the automobile thermal management system 1, which can effectively reduce the risk of liquid knock of the compressor 101.

[0053] In Figures 1 to 3 In the illustrated embodiment, the bypass branch 118 includes a bypass pipeline 119 and a bypass switch valve 120 provided in the bypass pipeline 119. The bypass pipeline 119 is connected between the inlet and the outlet of the compressor 101. The bypass pipeline 119 is connected between the compressor inlet 1011 and the compressor outlet 1012. The bypass switch valve 120 is used to control the opening and closing of the bypass pipeline 119 to control the opening and closing of the inlet and outlet of the compressor 101. The bypass switch valve 120 is used to control the opening and closing of the bypass pipeline 119 to control the opening and closing of the compressor inlet 1011 and the compressor outlet 1012. In this embodiment, the bypass switch valve 120 includes an electronic switch valve. The controller 123 includes a first control port 1231 connected to the bypass switch valve 120 and controls the bypass switch valve 120 through the first control port 1231. When the outside temperature reaches the low-temperature threshold, the controller 123 controls the bypass switch valve 120 to open through the first control port 1231, so that the bypass pipeline 119 is connected to the compressor inlet 1011 and the compressor outlet 1012. In this way, the high-temperature and high-pressure gas at the compressor outlet 1012 is introduced to the compressor inlet 1011 through the bypass branch 118, which can effectively help the compressor 101 start in a low-temperature environment, quickly increase the speed of the compressor 101 in an extremely low temperature, and provide more heat for the automobile thermal management system 1.

[0054] In Figures 1 to 3In the illustrated embodiment, the vehicle thermal management system 1 further includes an external temperature sensor 124 (such as...). Figure 3 As shown, the system is located outside the vehicle. An ambient temperature sensor 124 detects the ambient temperature and outputs an ambient temperature electrical signal. The controller 123 includes a first detection port 1232, which is connected to the ambient temperature sensor 124. The controller 123 detects the ambient temperature electrical signal through the first detection port 1232 and controls the opening and closing of the bypass valve 120 based on this signal. This allows for a simple control method, determining whether to open the bypass valve 120 based on the ambient temperature.

[0055] In some embodiments, when the controller 123 detects an external temperature signal via the first detection port 1232, indicating that the external temperature is below a temperature threshold, it controls the bypass switch valve 120 to open via the first control port 1231, connecting the bypass pipeline 119 to the compressor inlet 1011 and the compressor outlet 1012. In this embodiment, the temperature threshold can be -10°C, -15°C, -20°C, -25°C, -30°C, or -35°C, and is not limited thereto. For example, when the controller 123 detects an external temperature below -10°C, it indicates that the compressor 101 may experience slow or inability to start. Therefore, the controller opens the bypass switch valve 120, connecting the bypass pipeline 119 to the compressor inlet 1011 and the compressor outlet 1012. In some embodiments, when the controller 123 detects through the first detection port 1232 that the ambient temperature signal indicates the ambient temperature is higher than a temperature threshold, it means the compressor 101 can start normally. Therefore, the controller 123 controls the bypass valve 120 to close through the first control port 1231, disconnecting the compressor inlet 1011 from the compressor outlet 1012. This configuration, based on the ambient temperature, effectively helps the compressor 101 start quickly in low-temperature environments below -10°C when it is determined that the compressor 101 may experience slow or inability to start, ensuring good and normal operation of the compressor 101 and improving its starting efficiency and service life.

[0056] exist Figures 1 to 3In the illustrated embodiment, the automobile thermal management system 1 further comprises an inlet pressure sensor 121 and an outlet pressure sensor 122. The inlet pressure sensor 121 is arranged at the compressor inlet 1011 and is configured to detect the gas pressure at the compressor inlet 1011 and output an inlet pressure electrical signal. The outlet pressure sensor 122 is arranged at the compressor outlet 1012 and is configured to detect the gas pressure at the compressor outlet 1012 and output an outlet pressure electrical signal. The controller 123 comprises a second detection port 1233 connected to the inlet pressure sensor 121 and the outlet pressure sensor 122 respectively. The controller 123 detects the inlet pressure electrical signal and the outlet pressure electrical signal through the second detection port 1233 respectively, and controls the opening degree of the bypass switch valve 120 according to the inlet pressure electrical signal and the outlet pressure electrical signal, so as to control the flow of the refrigerant in the bypass pipeline 119. In this embodiment, the opening degree of the bypass switch valve 120 can be controlled according to the pressure difference between the compressor inlet 1011 and the compressor outlet 1012, so as to control the flow of the refrigerant in the bypass pipeline 119, thereby controlling the gas temperature at the compressor outlet 1012. In some embodiments, the controller 123 is configured to control the opening degree of the bypass switch valve 120 to increase when the pressure difference between the compressor inlet 1011 and the compressor outlet 1012 is large according to the inlet pressure electrical signal and the outlet pressure electrical signal. In some embodiments, the controller 123 is configured to control the opening degree of the bypass switch valve 120 to decrease and maintain the initial opening degree when the pressure difference between the compressor inlet 1011 and the compressor outlet 1012 is small according to the inlet pressure electrical signal and the outlet pressure electrical signal. In this way, the opening degree of the bypass switch valve 120 is accurately controlled to control the flow of the refrigerant in the bypass pipeline 119, thereby controlling the gas temperature at the compressor outlet 1012, which is beneficial to the rapid start of the compressor 101.

[0057] In this embodiment, when the bypass branch 118 is turned on, the cooler 103 can be used to absorb heat from the environment or utilize waste heat of the electrical appliance, thereby improving the heating efficiency when the bypass branch 118 is turned on, and realizing COP (Coefficient of Performance, heat pump performance coefficient) > 1 when the bypass branch 118 is turned on. COP represents the ratio of the heat output by the compressor 101 to the input electrical energy. The higher the COP, the higher the efficiency of the compressor 101. If the compressor 101 can provide more heat, more heat can be provided to the first heat exchange medium (refrigerant), so that the temperature of the second heat exchange medium (cooling medium) exchanged by the condenser 102 is increased, the temperature of the second heat exchange medium (cooling medium) of the second heat exchange circuit 12 can be ensured to be high, and the heating assembly 106 can be cancelled or not arranged, thereby reducing the cost.

[0058] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0059] It is to be understood that the application is not limited to the precise construction herein described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be indicated by the appended claims, rather than the description.

Claims

1. An automotive thermal management system, characterized by, The automobile thermal management system comprises a compressor, a condenser, a cooler, and a battery assembly, the compressor, the condenser, and the cooler are sequentially communicated and form a first heat exchange loop, the first heat exchange loop is filled with a first heat exchange medium; the condenser and the battery assembly are communicated and form a second heat exchange loop, the second heat exchange loop is filled with a second heat exchange medium; the condenser is used for heat exchange of the first heat exchange medium and the second heat exchange medium, so that the second heat exchange medium heats the battery assembly; wherein the first heat exchange medium is refrigeration medium, and the second heat exchange medium is cooling medium; the automobile thermal management system further comprises a preheating control valve and a preheating branch, the preheating control valve is arranged in the second heat exchange loop, and the preheating branch is connected with the battery assembly; the battery assembly comprises a plurality of battery cells, when a temperature difference between the plurality of battery cells exceeds a temperature difference threshold, the preheating control valve is controlled, the battery assembly is cut off from the second heat exchange loop, and the preheating branch is controlled, the battery assembly is communicated with the preheating branch and forms a battery preheating loop, and the plurality of battery cells are preheated through the battery preheating loop. The automobile thermal management system further comprises a heater core arranged in a passenger compartment of the automobile; the automobile thermal management system further comprises a controller connected with the preheating control valve; the preheating control valve comprises a first control end, a second control end, and a third control end, the first control end is connected with the condenser, the second control end is connected with the heater core, and the third control end is connected with the battery assembly. When the temperature difference between the plurality of battery cells exceeds the temperature difference threshold, the controller controls the third control end to be closed, and controls the preheating branch to be communicated with the plurality of battery cells and form the battery preheating loop.

2. The automotive thermal management system of claim 1, wherein, The preheating branch comprises a preheating pipeline and a preheating on-off valve arranged in the preheating pipeline, the preheating on-off valve is connected with the controller; when the temperature difference between the plurality of battery cells exceeds the temperature difference threshold, the controller controls the third control end to be closed, and controls the preheating on-off valve to be opened, so that the plurality of battery cells are communicated with the preheating branch and form the battery preheating loop.

3. The automotive thermal management system of claim 2, wherein, The preheating control valve comprises a three-way valve; and / or The preheating on-off valve comprises a one-way valve.

4. The automotive thermal management system of any one of claims 1-2, wherein, The automobile thermal management system further comprises a first battery temperature sensor, a second battery temperature sensor, and a controller, the controller is connected with the first battery temperature sensor and the second battery temperature sensor respectively, and the first battery temperature sensor and the second battery temperature sensor are located upstream and downstream of the battery assembly respectively; wherein The first battery temperature sensor is used for detecting a temperature of the second heat exchange medium entering the battery assembly and outputting a first battery signal; the second battery temperature sensor is used for detecting a temperature of the second heat exchange medium flowing out of the battery assembly and outputting a second battery signal; and the controller is used for determining the temperature difference between the plurality of battery cells according to the first battery signal and the second battery signal, and controlling the preheating control valve and the preheating branch when the temperature difference between the plurality of battery cells exceeds the temperature difference threshold.

5. The automotive thermal management system of claim 1, wherein, The automobile thermal management system further comprises a heating assembly arranged in the second heat exchange circuit, the heating assembly being configured to heat the second heat exchange medium in the second heat exchange circuit; and / or The automobile thermal management system further comprises a first power assembly arranged in the second heat exchange circuit and located upstream of the condenser; and / or The automobile thermal management system further comprises a second power assembly arranged in the second heat exchange circuit and located upstream of the battery assembly.

6. The automotive thermal management system of claim 1, wherein, The automobile thermal management system further comprises an electric machine assembly, the cooler being in communication with the electric machine assembly and forming a third heat exchange circuit. The third heat exchange circuit is filled with a third heat exchange medium, and the cooler is configured to exchange heat between the first heat exchange medium and the third heat exchange medium, so that the third heat exchange medium cools the electric machine assembly; wherein the third heat exchange medium is a cooling medium; and / or The automobile thermal management system further comprises a third power assembly arranged in the third heat exchange circuit.

7. The automotive thermal management system of claim 1, wherein, The automobile thermal management system further comprises a bypass branch connected between the inlet and the outlet of the compressor.

8. The automotive thermal management system of claim 7, wherein, The bypass branch comprises a bypass pipeline and a bypass switch valve arranged in the bypass pipeline; the bypass pipeline is connected between the inlet and the outlet of the compressor, and the bypass switch valve is configured to control the opening and closing of the bypass pipeline to control the opening and closing of the inlet and the outlet of the compressor.

9. An automobile characterized by comprising: The automobile thermal management system comprises: The automobile thermal management system according to any one of claims 1 to 8.

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