Battery thermal management system, battery pack and vehicle

Abstract

The utility model provides a battery thermal management system, a battery pack and a vehicle. The battery thermal management system comprises an inlet pipe, an outlet pipe, a first switching branch, a second switching branch and a battery module, wherein the battery module comprises a first interface and a second interface; when the temperature difference of the battery module does not reach a temperature difference threshold value, the inlet pipe is communicated with the first interface, and the second interface is communicated with the outlet pipe; and when the temperature difference of the battery module reaches a temperature difference threshold value, the inlet pipe is communicated with the second interface through the first switching branch, and the first interface is communicated with the outlet pipe through the second switching branch. By means of the arrangement, when the temperature difference is large, the temperature difference in the battery module can be reduced through switching of the two channels, the temperature in the battery module is balanced, a good battery module temperature adjusting effect can be achieved, then energy consumption of a vehicle is saved, the cruising ability of the vehicle is guaranteed, the service life of the battery module is prolonged, and the safety of the battery module is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery thermal management system, a battery pack and a vehicle. Background Art

[0002] Thermal management of battery modules is one of the important conditions to ensure the normal operation of the vehicle. The battery thermal management system has a very important impact on the safety, life, performance and energy efficiency of the battery module. The battery thermal management system is mainly set up to cool, heat and equalize the temperature of the battery module. In the related technology, when the battery thermal management system is in use, the internal temperature of the battery module varies greatly, and a good battery module temperature regulation effect cannot be achieved, resulting in excessive energy consumption of the vehicle, affecting the vehicle's endurance performance, and may also affect the life and safety of the battery module. Utility Model Content

[0003] The present application provides a battery thermal management system, a battery pack and a vehicle that can adjust temperature differences, reduce energy consumption, and improve the safety and life of battery modules.

[0004] The present application provides a battery thermal management system, comprising:

[0005] Inlet and outlet pipes;

[0006] A first switching branch and a second switching branch;

[0007] A battery module, comprising a first interface and a second interface; wherein, when the temperature difference of the battery module does not reach a temperature difference threshold, the inlet pipe is connected to the first interface, and the second interface is connected to the outlet pipe; when the temperature difference of the battery module reaches the temperature difference threshold, the inlet pipe is connected to the second interface through the first switching branch, and the first interface is connected to the outlet pipe through the second switching branch.

[0008] Optionally, the battery thermal management system includes a first switching component connected to the inlet pipe, the first interface, and the first switching branch; the first switching component includes a first port and a second port, the first port is connected to the inlet pipe, and the second port is connected to the first interface; wherein, when the temperature difference of the battery module does not reach a temperature difference threshold, the first switching component switches to connect the first port with the second port, so that the inlet pipe is connected to the first interface;

[0009] The battery thermal management system includes a second switching component, which is connected to the outlet pipe, the second interface, and the second switching branch; the second switching component includes a fourth port and a fifth port, the fourth port is connected to the outlet pipe, and the fifth port is connected to the second interface; wherein, when the temperature difference of the battery module does not reach the temperature difference threshold, the second switching component switches to connect the fourth port with the fifth port, so that the outlet pipe is connected to the second interface.

[0010] Optionally, the battery thermal management system includes a first switching component connected to the inlet pipe, the first interface, and the first switching branch; the first switching component includes a first port and a third port, the first port is connected to the inlet pipe, and the third port is connected to the first switching branch; wherein, when the temperature difference of the battery module reaches the temperature difference threshold, the first switching component switches to the first port to communicate with the third port, so that the inlet pipe is connected to the first switching branch, and is connected to the second interface through the first switching branch;

[0011] Optionally, the battery thermal management system includes a second switching component, which is connected to the outlet pipe, the second interface, and the second switching branch; the second switching component includes a fourth port and a sixth port, the fourth port is connected to the inlet pipe, and the sixth port is connected to the second switching branch; wherein, when the temperature difference of the battery module reaches the temperature difference threshold, the second switching component switches to the fourth port and connects with the sixth port, so that the outlet pipe is connected to the second switching branch, and connected to the first interface through the second switching branch.

[0012] Optionally, the first switching component includes a solenoid valve or an electrically controlled valve.

[0013] Optionally, the second switching component includes a solenoid valve or an electrically controlled valve.

[0014] Optionally, the battery module includes a shell and a battery cell body arranged in the shell.

[0015] Optionally, the first switching branch and the second switching branch are arranged outside the housing; or

[0016] Optionally, the first switching branch and the second switching branch are arranged in the shell.

[0017] Optionally, the battery cell body includes a plurality of battery cells; the battery thermal management system further includes a connecting pipe arranged between two adjacent battery cells among the plurality of battery cells, and the connecting pipe is connected to the first interface and the second interface.

[0018] Optionally, the battery thermal management system includes a first switching component connected to the inlet pipe, the first interface, and the first switching branch, the first switching component includes a third port, and the third port is connected to the first switching branch; the battery thermal management system includes a second switching component connected to the outlet pipe, the second interface, and the second switching branch, the second switching component includes a sixth port, and the sixth port is connected to the second switching branch; the third port is arranged toward one side of the outlet pipe, and the sixth port is arranged toward one side of the inlet pipe.

[0019] Optionally, the battery thermal management system also includes a battery management system; the battery thermal management system includes a first switching component and a second switching component, the battery management system is electrically connected to the first switching component and the second switching component, respectively, and the battery management system controls the working status of the first switching component and the second switching component.

[0020] Optionally, the first switching component includes a first port, a second port and a third port, the second switching component includes a fourth port, a fifth port and a sixth port, the battery thermal management system further includes a plurality of temperature sensors electrically connected to the battery management system, the plurality of temperature sensors are used to detect the temperatures of different areas of the battery module and output a corresponding plurality of electrical signals, and the battery management system is used to control the first switching component to switch to the first port to communicate with the second port so that the inlet pipe is connected to the first interface when all of the plurality of electrical signals indicate that the temperature difference of the battery module does not reach a temperature difference threshold; and control the second switching component to switch to the fourth port to communicate with the fifth port so that the outlet pipe is connected to the second interface;

[0021] The battery management system is also used to control the first switching component to switch to the first port to connect with the third port, so that the inlet pipe is connected to the first switching branch and connected to the second interface through the first switching branch, when at least one electrical signal among the multiple electrical signals indicates that the temperature difference of the battery module reaches the temperature difference threshold; and control the second switching component to switch to the fourth port to connect with the sixth port, so that the outlet pipe is connected to the second switching branch and connected to the first interface through the second switching branch.

[0022] The present application also provides a battery pack, comprising a battery thermal management system as described in any one of the foregoing.

[0023] The present application also provides a vehicle, comprising a battery pack as described in any one of the foregoing.

[0024] The battery thermal management system, battery pack and vehicle provided in the present application are provided with a first switching branch and a second switching branch, so that when the temperature difference of the battery module does not reach the temperature difference threshold, the inlet pipe is kept connected to the first interface, and the second interface is connected to the outlet pipe; when the temperature difference of the battery module reaches the temperature difference threshold, the inlet pipe is kept connected to the second interface through the first switching branch, and the first interface is connected to the outlet pipe through the second switching branch. In this way, when the temperature difference is large, the temperature difference in the battery module can be reduced by switching the above two pathways, and the temperature in the battery module can be balanced, so as to achieve a better battery module temperature regulation effect, thereby saving the vehicle's energy consumption, ensuring the vehicle's endurance, and improving the life and safety of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] Figure 1 Shown is a schematic diagram of an embodiment of a battery thermal management system of the present application.

[0027] Figure 2 Shown is a schematic diagram of yet another embodiment of a battery thermal management system of the present application.

[0028] Figure 3 Shown is a schematic diagram of another embodiment of a battery thermal management system of the present application.

[0029] Description of reference numerals:

[0030] Battery thermal management system 100; battery management system 200; inlet pipe 1; outlet pipe 2; first switching branch 3; second switching branch 4; battery module 5; first interface 51; second interface 52; housing 53; battery cell body 54; battery cell 541; first switching component 6; first port 61; second port 62; third port 63; second switching component 7; fourth port 71; fifth port 72; sixth port 73; connecting pipe 8; temperature sensor 9. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0032] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "one" or "one" and the like used in this application specification and claims do not indicate a quantitative limitation, but indicate the existence of at least one. "Multiple" includes two, which is equivalent to at least two. "Including" or "including" and the like mean that the elements or objects appearing in front of "including" or "including" include the elements or objects listed after "including" or "including" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and the like are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms of "one", "said" and "the" used in this application specification and the attached claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0033] The present application provides a battery thermal management system, a battery pack and a vehicle. The battery thermal management system includes an inlet pipe, an outlet pipe, a first switching branch, a second switching branch and a battery module. The battery module includes a first interface and a second interface. When the temperature difference of the battery module does not reach a temperature difference threshold, the inlet pipe is connected to the first interface, and the second interface is connected to the outlet pipe. When the temperature difference of the battery module reaches the temperature difference threshold, the inlet pipe is connected to the second interface through the first switching branch, and the first interface is connected to the outlet pipe through the second switching branch. The first switching branch and the second switching branch are arranged in such a way that when the temperature difference of the battery module does not reach the temperature difference threshold, the inlet pipe is kept connected to the first interface, and the second interface is connected to the outlet pipe; when the temperature difference of the battery module reaches the temperature difference threshold, the inlet pipe is kept connected to the second interface through the first switching branch, and the first interface is connected to the outlet pipe through the second switching branch. In this way, when the temperature difference is large, the temperature difference in the battery module can be reduced by switching the above two pathways, and the temperature in the battery module can be balanced, so as to achieve a better battery module temperature regulation effect, thereby saving the vehicle's energy consumption, ensuring the vehicle's endurance, and improving the life and safety of the battery module.

[0034] The present application provides a battery thermal management system, a battery pack and a vehicle. The battery thermal management system, the battery pack and the vehicle of the present application are described in detail below in conjunction with the accompanying drawings. The features of the following embodiments and implementations can be combined with each other if there is no conflict.

[0035] Figure 1FIG. 1 is a schematic diagram of an embodiment of a battery thermal management system 100 of the present application. Figure 2 FIG. 1 is a schematic diagram of another embodiment of a battery thermal management system 100 of the present application. Figure 1 and Figure 2 In the illustrated embodiment, the vehicle includes a battery pack and a controller. The battery pack includes a battery thermal management system 100 and a battery management system 200. The controller is electrically connected to the battery management system 200, and the controller is used to control the working state of other components in the vehicle. The battery thermal management system 100 is used to manage and adjust the temperature of the battery in the vehicle, and the battery management system 200 can be a BMS (full name: Battery Management System), which is used to detect the working state of the battery module 5, etc.

[0036] exist Figure 1 and Figure 2 In the illustrated embodiment, the battery thermal management system 100 includes an inlet pipe 1, an outlet pipe 2, a first switching branch 3, a second switching branch 4, and a battery module 5. One end of the inlet pipe 1 is used to connect to the battery module 5, and the other end is used to connect to other components in the battery thermal management system 100, so that the fluid medium can flow from other components in the battery thermal management system 100 into the inlet pipe 1. One end of the outlet pipe 2 is used to connect to the battery module 5, and the other end is used to connect to other components in the battery thermal management system 100, so that the fluid medium can flow from the outlet pipe 2 into other components in the battery thermal management system 100. The battery module 5 includes a first interface 51 and a second interface 52. The first interface 51 and the second interface 52 are used to circulate the fluid medium between the inside of the battery module 5 and other components of the battery thermal management system 100, so as to realize different working conditions of the battery module 5, such as heating, cooling or temperature equalization.

[0037] exist Figure 1 In the illustrated embodiment, when the temperature difference of the battery module 5 does not reach the temperature difference threshold, the inlet pipe 1 is connected to the first interface 51, and the second interface 52 is connected to the outlet pipe 2. When the temperature difference of the battery module 5 does not reach the temperature difference threshold, it means that the temperature difference on both sides of the battery module 5 is not too high at this time, that is, after the fluid medium enters from the inlet pipe 1, it first enters the body of the battery module 5 through the first interface 51, then passes through the body of the battery module 5 and passes out from the second interface 52, and finally flows out from the outlet pipe 2, thereby adjusting the temperature of the battery module 5. Specifically, the inlet of the inlet pipe 1 is connected to other components of the battery thermal management system 100, the outlet of the inlet pipe 1 is connected to the inlet of the first interface 51, the outlet of the first interface 51 is connected to a partial structure inside the battery module 5, the partial structure inside the battery module 5 is connected to the inlet of the second interface 52, the outlet of the second interface 52 is connected to the inlet of the outlet pipe 2, and the outlet of the outlet pipe 2 is connected to other components of the battery thermal management system 100.

[0038] exist Figure 2 In the illustrated embodiment, when the temperature difference of the battery module 5 reaches the temperature difference threshold, the inlet pipe 1 is connected to the second interface 52 through the first switching branch 3, and the first interface 51 is connected to the outlet pipe 2 through the second switching branch 4. When the temperature difference of the battery module 5 reaches the temperature difference threshold, it means that the temperature difference between the two sides of the battery module 5 is large at this time, that is, after the fluid medium enters from the inlet pipe 1, it first passes through the first switching branch 3, then enters the body of the battery module 5 through the second interface 52, and then passes through the first interface 51 and then from the second switching branch 4 to the outlet pipe 2, thereby adjusting the temperature of the battery module 5. When the temperature difference of the battery module 5 does not reach the temperature difference threshold, the inlet of the inlet pipe 1 is connected to other components of the battery thermal management system 100, the outlet of the inlet pipe 1 is connected to the inlet of the first switching branch 3, the outlet of the first switching branch 3 is connected to the inlet of the second interface 52, the outlet of the second interface 52 is connected to part of the internal structure of the battery module 5, the part of the internal structure of the battery module 5 is connected to the inlet of the first interface 51, the outlet of the first interface 51 is connected to the inlet of the second switching branch 4, the outlet of the second switching branch 4 is connected to the inlet of the outlet pipe 2, and the outlet of the outlet pipe 2 is connected to other components of the battery thermal management system 100.

[0039] The first switching branch 3 and the second switching branch 4 are set in this way, so that when the temperature difference of the battery module 5 does not reach the temperature difference threshold, the inlet pipe 1 is kept in communication with the first interface 51, and the second interface 52 is connected with the outlet pipe 2. When the temperature difference of the battery module 5 reaches the temperature difference threshold, the inlet pipe 1 is kept in communication with the second interface 52 through the first switching branch 3, and the first interface 51 is connected with the outlet pipe 2 through the second switching branch 4. When the temperature difference is large, the temperature difference in the battery module 5 can be reduced by switching the above two paths. Furthermore, in the battery module 5, the difference between the temperature of the part of the battery module 5 close to the first interface 51 and the temperature of the part of the battery module 5 close to the second interface 52 is reduced, and the temperature in the battery module 5 is balanced, which can achieve a better temperature regulation effect of the battery module 5, thereby saving the energy consumption of the vehicle, ensuring the endurance of the vehicle, and improving the life and safety of the battery module 5.

[0040] In this embodiment, when the battery module 5 is in a cooling condition, the temperature difference of the battery module 5 can be the difference between the average temperature of the part of the battery module 5 near the second interface 52 and the average temperature of the part of the battery module 5 near the first interface 51 in the battery module 5. When it does not reach the temperature threshold, the inlet pipe 1 is connected to the first interface 51, and the second interface 52 is connected to the outlet pipe 2; when it reaches the temperature threshold, the inlet pipe 1 is connected to the second interface 52 through the first switching branch 3, and the first interface 51 is connected to the outlet pipe 2 through the second switching branch 4. Such a setting can make the battery module 5 more accurately calculate the temperature difference of the battery module 5 under the cooling condition, so that the temperature of the battery module 5 is easier to control, improve the cooling effect of the battery module 5, improve the safety of the battery module 5, and reduce the energy consumption of the vehicle.

[0041] In this embodiment, when the battery module 5 is in the heating condition, the temperature difference of the battery module 5 can be the difference between the average temperature of the part of the battery module 5 near the first interface 51 and the average temperature of the part of the battery module 5 near the second interface 52 in the battery module 5. When it does not reach the temperature threshold, the inlet pipe 1 is connected to the first interface 51, and the second interface 52 is connected to the outlet pipe 2; when it reaches the temperature threshold, the inlet pipe 1 is connected to the second interface 52 through the first switching branch 3, and the first interface 51 is connected to the outlet pipe 2 through the second switching branch 4. Such a setting can make the battery module 5 more accurately calculate the temperature difference of the battery module 5 under the heating condition, so that the temperature of the battery module 5 is easier to control, improve the heating effect of the battery module 5, improve the safety of the battery module 5, and reduce the energy consumption of the vehicle.

[0042] Look back Figure 1In the illustrated embodiment, the battery thermal management system 100 includes a first switching component 6 and a second switching component 7. The first switching component 6 is used to switch the flow path of the fluid medium. The second switching component 7 is used to switch the flow path of the fluid medium. The fluid medium can be a coolant, a direct cooling agent, a direct heating agent, air, etc. The first switching component 6 includes a solenoid valve or an electrically controlled valve. In this embodiment, the first switching component 6 includes a solenoid valve. The solenoid valve is convenient for switching the flow path of the fluid medium, which is more convenient and fast, with high sensitivity, and stable and reliable. In some other embodiments, the first switching component 6 includes an electrically controlled valve, which can achieve precise flow control, etc., and can achieve multiple control modes. The second switching component 7 includes a solenoid valve or an electrically controlled valve. In this embodiment, the second switching component 7 includes a solenoid valve. The solenoid valve is convenient for switching the flow path of the fluid medium, which is more convenient and fast, with high sensitivity, and stable and reliable. In some other embodiments, the second switching component 7 includes an electrically controlled valve, which can achieve precise flow control, etc., and can achieve multiple control modes. The battery management system 200 is electrically connected to the first switching component 6 and the second switching component 7, respectively, and the battery management system 200 controls the working state of the first switching component 6 and the second switching component 7. With such arrangement, the working states of the first switching component 6 and the second switching component 7 are controlled by the battery management system 200 to ensure the intelligent operation of the vehicle and facilitate adjustment. The battery thermal management system 100 also includes a plurality of temperature sensors 9, which are electrically connected to the battery management system 200. The plurality of temperature sensors 9 are used to detect the temperatures of different areas of the battery module 5 and output corresponding multiple electrical signals. In some embodiments, the temperature sensor 9 can be placed in different areas inside the battery module 5 for detection. With such arrangement, the temperature detection of the battery module 5 is more accurate, and the temperature difference of the battery module 5 can be better controlled and understood.

[0043] exist Figure 1In the illustrated embodiment, the first switching component 6 is connected to the inlet pipe 1, the first interface 51, and the first switching branch 3. The first switching component 6 includes a first port 61 and a second port 62, the first port 61 is connected to the inlet pipe 1, and the second port 62 is connected to the first interface 51. Wherein, when the temperature difference of the battery module 5 does not reach the temperature difference threshold, the first switching component 6 switches to the first port 61 and the second port 62 to communicate, so that the inlet pipe 1 is connected to the first interface 51. The second switching component 7 is connected to the outlet pipe 2, the second interface 52, and the second switching branch 4. The second switching component 7 includes a fourth port 71 and a fifth port 72, the fourth port 71 is connected to the outlet pipe 2, and the fifth port 72 is connected to the second interface 52. Wherein, when the temperature difference of the battery module 5 does not reach the temperature difference threshold, the second switching component 7 switches to the fourth port 71 and the fifth port 72 to communicate, so that the outlet pipe 2 is connected to the second interface 52. In this way, the battery thermal management system 100 can conveniently adjust the flow path of the fluid medium in the battery thermal management system 100, and the temperature adjustment method of the battery module 5 is more convenient. In the present embodiment, when the temperature difference of the battery module 5 does not reach the temperature difference threshold, the inlet of the inlet pipe 1 is connected to other components of the battery thermal management system 100, and the outlet of the inlet pipe 1 is connected to the first port 61 of the first switching component 6, the first port 61 is the inlet, and the second port 62 is the outlet, the second port 62 of the first switching component 6 is connected to the inlet of the first interface 51, and the outlet of the first interface 51 is connected to the partial structure inside the battery module 5. In the present embodiment, the partial structure inside the battery module 5 may be a connecting pipe 8 for adjusting the temperature of the battery cell 541 of the battery module inside the battery module 5, the partial structure inside the battery module 5 is connected to the inlet of the second interface 52, and the outlet of the second interface 52 is connected to the fifth port 72 of the second switching component 7, the fifth port 72 is the inlet, and the fourth port 71 is the outlet, the fourth port 71 of the second switching component 7 is connected to the inlet of the outlet pipe 2, and the outlet of the outlet pipe 2 is connected to other components of the battery thermal management system 100. That is, the fluid medium flows to the inlet pipe 1 through other components of the battery thermal management system 100, flows to the first port 61 of the first switching component 6 through the inlet pipe 1, and then flows to the first interface 51 of the battery module 5 through the second port 62 of the first switching component 6, and then flows to the inside of the battery module 5, and then flows to the fifth port 72 of the second switching component 7 through the second interface 52 of the battery module 5, and then flows to the outlet pipe 2 through the fourth port 71 of the second switching component 7, and finally flows to other components of the battery thermal management system 100. The first switching component 6 and the second switching component 7 are provided to further control and manage the path of the fluid medium flowing to the inside of the battery module 5, so that the first switching component 6 can be switched to connect the first port 61 and the second port 62, and the second switching component 7 can be switched to connect the fourth port 71 and the fifth port 72, thereby making the switching of the battery module 5 more convenient, and further ensuring the stable operation of the battery thermal management system 100.

[0044] exist Figure 1 In the illustrated embodiment, the battery management system 200 is used to control the first switching component 6 to switch to the first port 61 to communicate with the second port 62, so that the inlet pipe 1 is connected to the first interface 51, when multiple electrical signals indicate that the temperature difference of the battery module 5 has not reached the temperature difference threshold. And the second switching component 7 is controlled to switch to the fourth port 71 to communicate with the fifth port 72, so that the outlet pipe 2 is connected to the second interface 52. Such a configuration enables the temperature in the battery module 5 to be accurately monitored by the battery management system 200 after detection, improves the switching efficiency through automation, and promptly discovers the temperature difference of the battery module 5, with a fast response speed.

[0045] exist Figure 2In the illustrated embodiment, the first switching component 6 is connected to the inlet pipe 1, the first interface 51, and the first switching branch 3. The first switching component 6 includes a first port 61 and a third port 63, the first port 61 is connected to the inlet pipe 1, and the third port 63 is connected to the first switching branch 3. The second switching component 7 includes a fourth port 71 and a sixth port 73, the fourth port 71 is connected to the inlet pipe 1, and the sixth port 73 is connected to the second switching branch 4. The third port 63 is arranged toward one side of the outlet pipe 2, and the sixth port 73 is arranged toward one side of the inlet pipe 1. In this way, the distance between the third port 63 and the outlet pipe 2 is reduced, and the distance between the sixth port 73 and the inlet pipe 1 is reduced, which facilitates the connection of the pipeline and makes the structure more compact. Among them, when the temperature difference of the battery module 5 reaches the temperature difference threshold, the first switching component 6 switches to the first port 61 and communicates with the third port 63, so that the inlet pipe 1 is connected to the first switching branch 3, and is connected to the second interface 52 through the first switching branch 3. The second switching component 7 is connected to the outlet pipe 2, the second interface 52, and the second switching branch 4. When the temperature difference of the battery module 5 reaches the temperature difference threshold, the second switching component 7 switches to the fourth port 71 to communicate with the sixth port 73, so that the outlet pipe 2 is connected to the second switching branch 4, and is connected to the first interface 51 through the second switching branch 4. With this arrangement, the battery thermal management system 100 can conveniently adjust the flow path of the fluid medium in the battery thermal management system 100, and the temperature adjustment method of the battery module 5 is more convenient. In this embodiment, when the temperature difference of the battery module 5 reaches the temperature difference threshold, the inlet of the inlet pipe 1 is connected to other components of the battery thermal management system 100, and the outlet of the inlet pipe 1 is connected to the first port 61 of the first switching component 6, the first port 61 is the inlet, and the third port 63 is the outlet, the third port 63 of the first switching component 6 is connected to the inlet of the first switching branch 3, the outlet of the first switching branch 3 is connected to the inlet of the second interface 52, and the outlet of the second interface 52 is connected to part of the internal structure of the battery module 5, the part of the internal structure of the battery module 5 is connected to the inlet of the first interface 51, the outlet of the first interface 51 is connected to the inlet of the second switching branch 4, and the outlet of the second switching branch 4 is connected to the sixth port 73 of the second switching component 7, the sixth port 73 is the inlet, and the fourth port 71 is the outlet, the fourth port 71 of the second switching component 7 is connected to the inlet of the outlet pipe 2, and the outlet of the outlet pipe 2 is connected to other components of the battery thermal management system 100. That is, the fluid medium flows to the inlet pipe 1 through other components of the battery thermal management system 100, then flows to the first switching branch 3 through the first port 61 and the third port 63 of the first switching component 6, then flows to the interior of the battery module 5 through the second interface 52 of the battery module 5, then flows to the second switching branch 4 through the first interface 51 of the battery module 5, then flows to the outlet pipe 2 through the sixth port 73 and the fourth port 71 of the second switching component 7, and finally flows to other components of the battery thermal management system 100.The first switching component 6 and the second switching component 7 are provided to further control and manage the path of the fluid medium flowing into the battery module 5, so that the first switching component 6 can be switched to connect the first port 61 and the third port 63, and the second switching component 7 can be switched to connect the fourth port 71 and the sixth port 73, thereby making the switching of the battery module 5 more convenient and further ensuring the stable operation of the battery thermal management system 100.

[0046] exist Figure 2 In the illustrated embodiment, the battery management system 200 is also used to control the first switching component 6 to switch to the first port 61 to communicate with the third port 63 when multiple electrical signals indicate that the temperature difference of the battery module 5 reaches the temperature difference threshold, so that the inlet pipe 1 is connected to the first switching branch 3, and is connected to the second interface 52 through the first switching branch 3. And the second switching component 7 is controlled to switch to the fourth port 71 to communicate with the sixth port 73, so that the outlet pipe 2 is connected to the second switching branch 4, and is connected to the first interface 51 through the second switching branch 4. Such a configuration enables the temperature in the battery module 5 to be accurately monitored by the battery management system 200 after detection, improves the switching efficiency through automation, and promptly discovers the temperature difference of the battery module 5, with a fast response speed.

[0047] exist Figure 2In the illustrated embodiment, the battery module 5 includes a shell 53 and a battery cell body 54 disposed in the shell 53. The shell 53 is used to wrap and protect the battery cell body 54 and other structures inside the battery module 5. The battery cell body 54 includes a plurality of battery cells 541. The battery cell 541 is used to input or output electrical energy. In the present embodiment, three battery cells 541 are provided, and four, five, etc. may also be provided, and the number is not limited thereto. The battery thermal management system 100 also includes a connecting pipe 8 arranged between two adjacent battery cells 541 among the plurality of battery cells 541, and the connecting pipe 8 is connected to the first interface 51 and the second interface 52. The connecting pipe 8 is used to circulate a fluid medium, thereby adjusting the temperature of the plurality of battery cells 541 in the battery module 5. In this arrangement, it is convenient for the plurality of battery cells 541 to be adjacent to the connecting pipe 8, so that the temperature of the plurality of battery cells 541 inside the battery module 5 can be adjusted. In some embodiments, the connecting pipe 8 can also cool the multiple battery cells 541 inside the battery module 5 through other paths, such as a Z-shaped path, a W-shaped path, etc. The connecting pipe 8 can be arranged according to the arrangement of the multiple battery cells 541 in the battery module 5. In this embodiment, the multiple battery cells 541 are arranged in sequence in the width direction of the battery module 5. In some other embodiments, the multiple battery cells 541 can be arranged in sequence in the length direction of the battery module 5 inside the battery module 5. In some other embodiments, the multiple battery cells 541 can also be arranged in sequence in the length direction and the width direction of the battery module 5. The first interface 51 and the second interface 52 are symmetrically arranged. In this way, the structure is compact and it is easier to connect the pipeline. In this embodiment, the first switching branch 3 includes at least one of a straight pipeline and a curved pipeline. The second switching branch 4 includes at least one of a straight pipeline and a curved pipeline. In this way, the first switching branch 3 and the second switching branch 4 can be assembled and connected through a straight pipeline and a curved pipeline, so as to facilitate connection. The first switching branch 3 and the second switching branch 4 are arranged outside the shell 53. Such arrangement facilitates the assembly, maintenance and disassembly of the first switching branch 3 and the second switching branch 4. In this embodiment, the first switching component 6 and the second switching component 7 are also arranged outside the housing 53. Such arrangement facilitates the assembly, maintenance and disassembly of the first switching component 6 and the second switching component 7.

[0048] Figure 3 FIG. 1 is a schematic diagram of another embodiment of a battery thermal management system 100 of the present application. Figure 3 The battery thermal management system 100 shown in the embodiment is Figure 2 The battery thermal management system 100 shown in the embodiment is similar, the main difference is that Figure 3In the illustrated embodiment, the first switching branch 3 and the second switching branch 4 are disposed in the housing 53. In this arrangement, the first switching branch 3 and the second switching branch 4 are further protected by the housing 53. In this embodiment, the first switching component 6 and the second switching component 7 are also disposed in the housing 53. In this arrangement, the first switching component 6 and the second switching component 7 are further protected by the housing 53.

[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A battery thermal management system, characterized in that: include: Inlet and outlet pipes; A first switching branch and a second switching branch; A battery module, comprising a first interface and a second interface; wherein, when the temperature difference of the battery module does not reach a temperature difference threshold, the inlet pipe is connected to the first interface, and the second interface is connected to the outlet pipe; when the temperature difference of the battery module reaches the temperature difference threshold, the inlet pipe is connected to the second interface through the first switching branch, and the first interface is connected to the outlet pipe through the second switching branch.

2. The battery thermal management system according to claim 1, characterized in that: The battery thermal management system includes a first switching component connected to the inlet pipe, the first interface, and the first switching branch; the first switching component includes a first port and a second port, the first port is connected to the inlet pipe, and the second port is connected to the first interface; wherein, when the temperature difference of the battery module does not reach the temperature difference threshold, the first switching component switches to the first port to communicate with the second port, so that the inlet pipe is connected to the first interface; The battery thermal management system includes a second switching component, which is connected to the outlet pipe, the second interface, and the second switching branch; the second switching component includes a fourth port and a fifth port, the fourth port is connected to the outlet pipe, and the fifth port is connected to the second interface; wherein, when the temperature difference of the battery module does not reach the temperature difference threshold, the second switching component switches to connect the fourth port with the fifth port, so that the outlet pipe is connected to the second interface.

3. The battery thermal management system according to claim 1, characterized in that: The battery thermal management system includes a first switching component connected to the inlet pipe, the first interface, and the first switching branch; the first switching component includes a first port and a third port, the first port is connected to the inlet pipe, and the third port is connected to the first switching branch; wherein, when the temperature difference of the battery module reaches the temperature difference threshold, the first switching component switches to the first port to be connected to the third port, so that the inlet pipe is connected to the first switching branch, and is connected to the second interface through the first switching branch; The battery thermal management system includes a second switching component, which is connected to the outlet pipe, the second interface, and the second switching branch; the second switching component includes a fourth port and a sixth port, the fourth port is connected to the inlet pipe, and the sixth port is connected to the second switching branch; wherein, when the temperature difference of the battery module reaches the temperature difference threshold, the second switching component switches to the fourth port to connect with the sixth port, so that the outlet pipe is connected to the second switching branch, and connected to the first interface through the second switching branch.

4. The battery thermal management system according to claim 2 or 3, characterized in that: The first switching component includes a solenoid valve or an electrically controlled valve; and / or The second switching component includes a solenoid valve or an electrically controlled valve.

5. The battery thermal management system according to claim 1, characterized in that: The battery module comprises a shell and a battery cell body arranged in the shell; The first switching branch and the second switching branch are arranged outside the housing; or The first switching branch and the second switching branch are arranged in the housing.

6. The battery thermal management system according to claim 5, characterized in that: The battery cell body includes a plurality of battery cells; the battery thermal management system also includes a connecting pipe arranged between two adjacent battery cells among the plurality of battery cells, and the connecting pipe is connected to the first interface and the second interface.

7. The battery thermal management system according to claim 1, characterized in that: The battery thermal management system includes a first switching component connected to the inlet pipe, the first interface, and the first switching branch, the first switching component includes a third port, and the third port is connected to the first switching branch; the battery thermal management system includes a second switching component connected to the outlet pipe, the second interface, and the second switching branch, the second switching component includes a sixth port, and the sixth port is connected to the second switching branch; the third port is arranged toward one side of the outlet pipe, and the sixth port is arranged toward one side of the inlet pipe.

8. The battery thermal management system according to claim 1, characterized in that: The battery thermal management system also includes a battery management system; the battery thermal management system includes a first switching component and a second switching component, the battery management system is electrically connected to the first switching component and the second switching component respectively, and the battery management system controls the working status of the first switching component and the second switching component.

9. The battery thermal management system according to claim 8, characterized in that: The first switching component includes a first port, a second port and a third port, the second switching component includes a fourth port, a fifth port and a sixth port, the battery thermal management system also includes a plurality of temperature sensors electrically connected to the battery management system, the plurality of temperature sensors are used to detect the temperature of different areas of the battery module and output a corresponding plurality of electrical signals, the battery management system is used to control the first switching component to switch to the first port to communicate with the second port when all of the plurality of electrical signals indicate that the temperature difference of the battery module does not reach a temperature difference threshold, so that the inlet pipe is connected to the first interface; and control the second switching component to switch to the fourth port to communicate with the fifth port, so that the outlet pipe is connected to the second interface; The battery management system is also used to control the first switching component to switch to the first port to connect with the third port, so that the inlet pipe is connected to the first switching branch and connected to the second interface through the first switching branch, when at least one electrical signal among the multiple electrical signals indicates that the temperature difference of the battery module reaches the temperature difference threshold; and control the second switching component to switch to the fourth port to connect with the sixth port, so that the outlet pipe is connected to the second switching branch and connected to the first interface through the second switching branch.

10. A battery pack, characterized in that: The invention comprises a battery thermal management system as claimed in any one of claims 1 to 9.

11. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 10 above.

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