Connecting device, heat exchange assembly, battery pack and vehicle

Abstract

The utility model discloses a connecting device, a heat exchange assembly, a battery pack and a vehicle, the connecting device is provided with a first interface and a plurality of second interfaces, the first interface is communicated with the plurality of second interfaces, the first interface is used for connecting an external pipeline, and the plurality of second interfaces are used for connecting a heat exchange device. According to the connecting device designed by the utility model, the pressure drop can be reduced, and the medium flowing efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of battery packs, and in particular to a connecting device, a heat exchange component, a battery pack and a vehicle. Background Art

[0002] In the related art, the battery pack is provided with a cold plate to exchange heat with the battery, and the cold plate is provided with a valve to control the state and flow of the refrigerant. In the prior art, the location of each flow channel of the cold plate and the distribution method of the flow of each flow channel result in that the heat exchange of the battery with high heat generation is relatively small, and the heat exchange of the battery with low heat generation is relatively large, resulting in a large temperature difference among individual batteries, resulting in poor temperature uniformity of the battery and low heat exchange efficiency of the cold plate. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a connecting device. The connecting device designed according to the utility model can reduce pressure drop and improve medium flow efficiency.

[0004] The utility model also provides a heat exchange component with the above-mentioned connecting device.

[0005] The utility model also provides a battery pack having the above heat exchange component.

[0006] The utility model also provides a vehicle with the battery pack.

[0007] According to the utility model, a first interface and a plurality of second interfaces are provided on the connection device, the first interface is communicated with the plurality of second interfaces, the first interface is used to connect to an external pipeline, and the plurality of second interfaces are used to connect to a heat exchange device.

[0008] The connecting device according to the utility model connects the external pipeline and the heat exchange device, which can divert the medium flowing from the external pipeline to the heat exchange device to reduce the pressure drop, and can also converge the medium flowing from the heat exchange device to the external pipeline to improve the medium flow efficiency.

[0009] According to some embodiments of the utility model, a flow path is formed inside the connecting device, a first end of the flow path is connected to the first interface, the flow path has multiple second ends, each second end is connected to at least one second interface, so as to form multiple branch flow paths between the first interface and the second interface.

[0010] According to some embodiments of the present invention, the apertures of the plurality of second interfaces are different, and / or the diameters of the plurality of branch flow paths are different, and / or the plurality of branch flow paths are provided with flow regulating devices.

[0011] According to some embodiments of the present utility model, the branch flow path includes a first branch flow path and a second branch flow path, the first ends of the first branch flow path and the second branch flow path are both connected to the first interface, the second end of the first branch flow path is connected to at least two of the second interfaces, and the second end of the second branch flow path is connected to one of the second interfaces.

[0012] According to some embodiments of the present invention, there are multiple second branch flow paths.

[0013] According to some embodiments of the present utility model, the connecting device is further provided with a confluence chamber and a third interface, the confluence chamber and the third interface are communicated, the third interface is used to connect to an external pipeline, and the confluence chamber is used to connect to a heat exchange device.

[0014] The following briefly describes the heat exchange component according to the second embodiment of the utility model.

[0015] The heat exchange assembly according to the utility model includes: a heat exchange device, the heat exchange device is formed with a heat exchange flow channel; a connecting device, the connecting device is constructed as the connecting device in any one of the above embodiments, and a plurality of the second interfaces are connected to the heat exchange device and are suitable for connecting the first interface with the heat exchange flow channel. Since the heat exchange assembly according to the utility model is provided with the connecting device in the above embodiment, the heat exchange assembly has good temperature uniformity performance.

[0016] According to some embodiments of the present utility model, the heat exchange channel includes a first channel group and a second channel group, the first channel group is suitable for heat exchange with a first part of the battery cell, and the second channel group is suitable for heat exchange with a second part of the battery cell. When the battery cell is working, the temperature of the first part of the battery cell is higher than the temperature of the second part.

[0017] According to some embodiments of the utility model, the multiple second interfaces include a type I second interface and a type II second interface; the first flow channel group includes a plurality of subgroups, at least two of the plurality of subgroups are connected in parallel, the two parallel subgroups are respectively a first subgroup and a second subgroup, the first port of the first subgroup is connected to the type I second interface, and the first port of the second subgroup is connected to the type II second interface.

[0018] According to some embodiments of the present invention, the caliber of the first type of second interface is different from the caliber of the second type of second interface.

[0019] According to some embodiments of the present invention, the caliber of the first type of second interface is smaller than the caliber of the second type of second interface; the distance from the first subgroup to the connecting device is smaller than the distance from the second subgroup to the connecting device.

[0020] According to some embodiments of the present invention, the flow channel lengths of the first subgroup and the second subgroup are different, or the flow resistances of the first subgroup and the second subgroup are different.

[0021] According to some embodiments of the utility model, there are at least two connecting devices and include a first connecting joint and a second connecting joint, each of the connecting devices includes a confluence chamber and a third interface, and the confluence chamber and the third interface are connected; the multiple branch flow paths of the first connecting joint are respectively connected to the first ends of multiple first flow channel groups, and the confluence chamber of the first connecting joint is connected to the first ends of multiple second flow channel groups; the multiple branch flow paths of the second connecting joint are respectively connected to the second ends of multiple second flow channel groups, and the confluence chamber of the second connecting joint is connected to the second ends of multiple first flow channel groups.

[0022] According to some embodiments of the utility model, there are at least two connecting devices and include a first connecting joint and a second connecting joint, each of the connecting devices includes a confluence chamber and a third interface, and the confluence chamber and the third interface are connected; the multiple branch flow paths of the first connecting joint are respectively connected to the first ends of multiple first flow channel groups, and the confluence chamber of the first connecting joint is connected to the second ends of multiple first flow channel groups; the multiple branch flow paths of the second connecting joint are respectively connected to the first ends of multiple second flow channel groups, and the confluence chamber of the second connecting joint is connected to the second ends of multiple second flow channel groups.

[0023] According to some embodiments of the present invention, the first connecting joint and the second connecting joint are located on the same side of the heat exchange device.

[0024] According to some embodiments of the present invention, the heat exchange component further includes: a temperature averaging plate, which is disposed on the heat exchange device and performs heat exchange with the heat exchange device.

[0025] The following briefly describes a battery pack according to an embodiment of the third aspect of the utility model.

[0026] The battery pack according to the utility model includes: a plurality of battery cells; a heat exchange assembly, wherein the heat exchange assembly is any one of the heat exchange assemblies in the above embodiments, and the heat exchange device exchanges heat with the plurality of battery cells. Since the battery pack according to the utility model is provided with the heat exchange assembly in the above embodiments, the battery pack has better stability and power supply endurance.

[0027] According to some embodiments of the utility model, the heat exchange device is provided with a first heat exchange region and a second heat exchange region, the first heat exchange region includes a plurality of the first flow channel groups, the second heat exchange region includes a second flow channel group, the first heat exchange region exchanges heat with a first part of the plurality of battery cells, and the second heat exchange region exchanges heat with a second part of the plurality of battery cells.

[0028] The following briefly describes a vehicle according to an embodiment of the fourth aspect of the utility model.

[0029] The vehicle according to the utility model includes the connecting device described in any one of the above embodiments or includes the heat exchange component described in any one of the above embodiments or includes the battery pack described in any one of the above embodiments. Since the vehicle according to the utility model is provided with the battery pack described in the above embodiments, the vehicle is safe to use and has better endurance.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 It is a structural diagram of the battery pack and the heat exchange device according to an embodiment of the utility model.

[0033] Figure 2 It is an overall structural diagram of a heat exchange component according to an embodiment of the utility model.

[0034] Figure 3 It is a structural diagram of a heat exchange device according to an embodiment of the utility model.

[0035] Figure 4 It is a structural diagram of a temperature equalizing plate according to an embodiment of the utility model.

[0036] Figure 5 It is a schematic diagram of the first heat exchange area according to an embodiment of the utility model.

[0037] Figure 6 Schematic diagram of a first flow channel group according to an embodiment of the utility model.

[0038] Figure 7 yes Figure 6 A partial enlarged view of .

[0039] Figure 8 It is a schematic diagram of the second heat exchange area according to an embodiment of the utility model.

[0040] Fig. 9Schematic diagram of the second flow channel group according to an embodiment of the utility model.

[0041] Fig.10 yes Fig. 9 A partial enlarged view of .

[0042] Fig.11 It is a structural diagram of a first connection joint according to an embodiment of the utility model.

[0043] Fig.12 It is a front cross-sectional view of the first connecting joint according to an embodiment of the utility model.

[0044] Fig.13 It is a bottom view of the first connecting joint according to an embodiment of the utility model.

[0045] Fig.14 It is a structural diagram of a second connection joint according to an embodiment of the utility model.

[0046] Fig.15 It is a front cross-sectional view of the second connecting joint according to an embodiment of the utility model.

[0047] Fig.16 It is a bottom view of the second connecting joint according to an embodiment of the utility model.

[0048] Fig.17 It is a schematic diagram of flow paths according to some embodiments of the utility model.

[0049] Fig.18 It is a schematic diagram of flow paths according to other embodiments of the utility model.

[0050] Fig.19 It is a schematic diagram of a battery cell according to an embodiment of the utility model.

[0051] Fig. 20 Schematic diagram of a battery pack according to an embodiment of the utility model.

[0052] Fig.21 is a schematic diagram of a vehicle according to some embodiments of the present utility model.

[0053] Fig. 22 Schematic diagrams of vehicles according to other embodiments of the utility model.

[0054] Reference numerals:

[0055] 10000, vehicle; 1000, battery pack;

[0056] 1. Heat exchange components;

[0057] 10. heat exchange device; 101. first area; 102. second area; 103. third area; 11. first heat exchange area; 111. first flow channel group;

[0058] 12. second heat exchange region; 121. second flow channel group;

[0059] 20. Connecting device; 21. First connecting joint; 22. Second connecting joint;

[0060] 20a, first interface;

[0061] 20b, second interface; 201b, first-class second interface; 202b, second-class second interface;

[0062] 20c, branch flow path; 201c, first end; 202c, second end; 203c, first branch flow path; 204c, second branch flow path;

[0063] 20d, confluence chamber; 20e, third interface; 20f, fourth interface;

[0064] 30. Temperature balancing plate; 30a. Diverter hole; 31. Joint matching position;

[0065] 2. Battery cell; 2a. First part; 2b. Second part. DETAILED DESCRIPTION

[0066] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0071] In the related art, the battery pack is provided with a cold plate to exchange heat with the battery, and the cold plate is provided with a valve to control the state and flow of the refrigerant. In the prior art, the location of each flow channel of the cold plate and the distribution method of the flow of each flow channel result in that the heat exchange of the battery with high heat generation is relatively small, and the heat exchange of the battery with low heat generation is relatively large, resulting in a large temperature difference among individual batteries, resulting in poor temperature uniformity of the battery and low heat exchange efficiency of the cold plate.

[0072] Reference below Figure 1-Figure 19 A connection device 20 according to an embodiment of the present invention is described.

[0073] like Figure 1-Figure 19 As shown, according to the utility model, a first interface 20a and multiple second interfaces 20b are provided on the connecting device 20, the first interface 20a is connected to the multiple second interfaces 20b, the first interface 20a is used to connect to the external pipeline, and the multiple second interfaces 20b are used to connect to the heat exchange device 10.

[0074] Specifically, the connecting device 20 according to the utility model is suitable for connecting an external pipeline with the heat exchange device 10. The working fluid flowing in the external pipeline flows to the heat exchange device 10 through the connecting device 20, and the working fluid flowing in from the first interface 20a can flow out through multiple second interfaces 20b, thereby realizing the diversion of the working fluid, and reducing the pressure drop of the working fluid flow system jointly composed of the external pipeline, the connecting device 20 and the heat exchange device 10. Similarly, the working fluid in the heat exchange device 10 can also flow from the connecting device 20 toward the external pipeline, and the multiple streams of working fluid flowing in from the second interface 20a converge at the first interface 20a and then enter the external pipeline, thereby improving the medium flow efficiency in the working fluid flow system.

[0075] According to the utility model, the connecting device 20 connects the external pipeline and the heat exchange device 10, which can divert the medium flowing from the external pipeline toward the heat exchange device 10 to reduce the pressure drop, and can also converge the medium flowing from the heat exchange device 10 toward the external pipeline to improve the medium flow efficiency.

[0076] In some embodiments, the working fluid circulation system can be used in equipment that requires thermal management, such as a battery pack 1000. Such equipment generally has a thermal management system, and the heat exchange device 10 in the working fluid circulation system is suitable for exchanging heat with other structures in the thermal management system.

[0077] In some embodiments, the external pipeline may be an air conditioning pipeline or a coolant pipeline.

[0078] In some embodiments, the connecting device 20 is not limited to connecting external pipelines and the heat exchange device 10, but can also be used to connect other structures that require one inlet and multiple outlets or multiple inlets and one outlet.

[0079] Similarly, in some embodiments, the connecting device 20 is not limited to connecting two structures, but can also connect multiple structures. For example, the first interface 20a can be connected to the first structure, and the multiple second interfaces 20b can be respectively connected to the second structure, the third structure, etc.

[0080] According to some embodiments of the present invention, Fig.12 , Fig.13 , Figure 15-18 As shown, a flow path is formed inside the connection device 20, a first end 201c of the flow path is connected to the first interface 20a, and the flow path has a plurality of second ends 202c, each of which is connected to at least one second interface 20b, so as to form a plurality of branch flow paths 20c between the first interface 20a and the second interface 20b. Specifically, the flow path connects the first interface 20a and the plurality of second interfaces 20b, and the flow path between the first interface 20a and each second interface 20b is a branch flow path 20c.

[0081] Here, it can be Figure 18-19As shown, a second interface 20b is connected to a second end 202c, and a branch flow path 20c connects the first interface 20a and a second interface 20b; it can also be as follows Figure 18-19 As shown, the plurality of second interfaces 20b are connected to a second end 202c, and at this time, a branch flow path 20c connects the first interface 20a and the plurality of second interfaces 20b.

[0082] According to some embodiments of the present invention, Fig.13 , Fig.16 As shown, the apertures of the multiple second interfaces 20b are different, and / or the diameters of the multiple branch flow paths 20c are different, and / or the multiple branch flow paths 20c are provided with flow regulating devices, which can regulate the flow of the working fluid flowing through the second interfaces 20b or the branch flow paths 20c, so that the flow of the working fluid in the working fluid circulation system and the flow of the working fluid at the second interfaces 20b or the branch flow paths 20c are controllable.

[0083] According to some embodiments of the present invention, the branch flow path 20c includes a first branch flow path 203c and a second branch flow path 204c, the first ends 201c of the first branch flow path 203c and the second branch flow path 204c are both connected to the first interface 20a, the second end 202c of the first branch flow path 203c is connected to at least two second interfaces 20b, and the second end 202c of the second branch flow path 204c is connected to one second interface 20b. Specifically, Fig.18 As shown, the first branch flow path 203c connects the first interface 20a with multiple second interfaces 20b, and the second branch flow path 204c connects the first interface 20a with one second interface 20b. In some embodiments, there are multiple second branch flow paths 204c.

[0084] According to some embodiments of the present invention, Fig.11 , Fig.13 , Fig.14 and Fig.16 As shown, the connecting device 20 is further provided with a confluence chamber 20d and a third interface 20e. The confluence chamber 20d and the third interface 20e are communicated with each other. The third interface 20e is used to connect to an external pipeline, and the confluence chamber 20d is used to connect to the heat exchange device 10.

[0085] Specifically, the structure in which the working medium flows through the external pipeline can be connected to the connecting device 20 through the first interface 20a and the third interface 20e. At this time, the working medium flowing in the external pipeline can flow in from the first interface 20a of the connecting device 20, and be diverted to the corresponding second interface 20b through multiple branch flow paths 20c, thereby flowing to the heat exchange device 10; and the working medium flowing in the heat exchange device 10 converges to the confluence chamber 20d, and can flow to the external pipeline through the third interface 20e. Of course, the working medium can also flow from the second interface 20b to the first interface 20a, or from the third interface 20e to the confluence chamber 20d, which can be selected according to actual needs and is not limited here. At this time, the connecting device 20 integrates the function of bidirectionally connecting the heat exchange device 10 and the external pipeline, which can improve the integration of the working medium circulation system. According to the connecting device 20 of the utility model, the functions of diversion and convergence are integrated, and its functions are rich and can adapt to various working conditions.

[0086] In some embodiments, the working fluid can flow into the flow channel of the heat exchange device 10 through the first interface 20a of a connecting device 20, and then flow out of the heat exchange device 10 through the third interface 20e of the same connecting device 20, or flow out of the heat exchange device 10 through the first interface 20a or the third interface 20e of another connecting device 20; alternatively, the working fluid can flow into the flow channel of the heat exchange device 10 through the third interface 20e of a connecting device 20, and then flow out of the heat exchange device 10 through the first interface 20a of the same connecting device 20, or flow out of the heat exchange device 10 through the first interface 20a or the third interface 20e of another connecting device 20.

[0087] In some embodiments, the surface of the connection device 20 formed with the confluence cavity 20d is also formed with a fourth interface 20f, and the fourth interface 20f connects the confluence cavity 20d with the third interface 20e.

[0088] Reference below Figure 1-Figure 19 A heat exchange assembly 1 according to an embodiment of the present utility model is described.

[0089] like Figure 1-Figure 19 As shown, the heat exchange component 1 according to the utility model includes: a heat exchange device 10 and a connecting device 20, the heat exchange device 10 is formed with a heat exchange flow channel; the connecting device 20 is constructed as a connecting device 20 according to any one of the above embodiments, and a plurality of second interfaces 20b are connected to the heat exchange device 10 and are suitable for connecting the first interface 20a with the heat exchange flow channel.

[0090] Specifically, the heat exchange component 1 according to the present application is suitable for equipment that requires thermal management, such as a battery pack 1000. Such equipment generally has a thermal management system. The heat exchange component 1 is suitable for exchanging heat with other structures in the thermal management system. In some embodiments, the heat exchange component 1 can be used to exchange heat with the battery pack 1000.

[0091] In some embodiments, the working fluid flowing in the external pipeline is a heat exchange medium. The heat exchange flow channel of the heat exchange device 10 has a heat exchange medium flowing therein, and the connecting device 20 is respectively connected to the heat exchange flow channel of the heat exchange device 10 and the external pipeline to exchange the heat exchange medium in the external pipeline and the heat exchange device 10.

[0092] Since the heat exchange component 1 according to the utility model is provided with the connecting device 20 of the above embodiment, the heat exchange component has good temperature uniformity performance.

[0093] According to some embodiments of the present invention, Fig.16 As shown, the heat exchange channel includes a first channel group 111 and a second channel group 121, and the first channel group 111 and the second channel group 121 are used for heat exchange with different areas of the battery cell 2; wherein the first channel group 111 is suitable for heat exchange with the first part 2a of the battery cell 2, and the second channel group 121 is suitable for heat exchange with the second part 2b of the battery cell 2, and when the battery cell 2 is working, the temperature of the first part 2a of the battery cell 2 is higher than the temperature of the second part 2b.

[0094] In some embodiments, the electrode region of the battery cell 2 is the first part 2a, and the non-electrode region of the battery cell 2 is the second part 2b. When the battery cell 2 is working, the electrode region of the battery cell 2 generates more heat, and the non-electrode region of the battery cell 2 generates less heat. The temperature of the first part 2a of the battery cell 2 is higher than the temperature of the second part 2b.

[0095] Specifically, the first flow channel group 111 and the second flow channel group 121 on the heat exchange device 10 can respectively correspond to and exchange heat with the first part 2a of the battery cell 2 and the second part 2b of the battery cell 2. The flow channel temperature of the first flow channel group 111 can be controlled by regulating the state and flow rate of the medium in the flow channel of the first flow channel group 111, thereby regulating the temperature of the first part 2a. The flow channel temperature of the second flow channel group 121 can also be controlled by regulating the state and flow rate of the medium in the flow channel of the second flow channel group 121, thereby regulating the temperature of the second part 2b, so that the heat exchange medium is reasonably distributed and the heat exchange efficiency is improved.

[0096] Alternatively, any two regions of the battery pack 1000 with a temperature difference may use the first flow channel group 111 and the second flow channel group 121 for heat exchange.

[0097] In some embodiments, the first flow channel group 111 and the second flow channel group 121 are independently controlled, so that the heat exchange component 1 can achieve multi-zone temperature control of the heat exchange device 10 by respectively controlling the temperatures of the first flow channel group 111 and the second flow channel group 121. The flow rate of each flow channel can be allocated according to the heat generation law of the battery cell 2, so as to achieve on-demand allocation of the heat exchange medium, which is beneficial to reducing the temperature difference of the battery cell 2 itself, improving the temperature uniformity of the battery cell 2, reducing the flow resistance, and improving the heat exchange efficiency of the heat exchange component 1.

[0098] In some embodiments, the heat exchange assembly 1 of the present application can be used for a short-blade multi-module battery pack. Through the diversion structure of the connecting device 20 and the multi-zone temperature control, the heat exchange medium flow can be effectively distributed, which is beneficial to reducing the temperature difference between the battery cells 2 and improving the temperature uniformity.

[0099] In some embodiments, the first flow channel group 111 can be used to exchange heat with the electrode region of the battery cell 2. Specifically, the electrode region of the battery cell 2 generates a large amount of heat, and the heat exchange medium flowing through the first flow channel group 111 should be a heat exchange medium with a lower temperature to be suitable for cooling the electrode region.

[0100] In some embodiments, the second flow channel group 121 can be used to exchange heat with the non-electrode area of ​​the battery cell 2. Specifically, the non-electrode area of ​​the battery cell 2 generates less heat, and the heat exchange medium flowing through the second flow channel group 121 should be a heat exchange medium with a higher temperature to be suitable for heating the non-electrode area.

[0101] The temperature uniformity of the battery cell 2 is improved by cooling the electrode area and / or heating the non-electrode area, thereby reducing the temperature difference of the battery cell 2 itself.

[0102] According to some embodiments of the present invention, Fig.13 , Fig.16 As shown, the multiple second interfaces 20b include a type I second interface 201b and a type II second interface 202b, the first flow channel group 111 includes a plurality of subgroups, at least two of the multiple subgroups are connected in parallel, the two parallel subgroups are respectively the first subgroup and the second subgroup, the first port of the first subgroup is connected to the type I second interface 201b, and the first port of the second subgroup is connected to the type II second interface 202b.

[0103] Specifically, the first subgroup and the second subgroup are connected to different second interfaces 20b, so that the flow rates of the heat exchange medium flowing into the first subgroup and the second subgroup may be different. In some embodiments, the first subgroup is longer than the second subgroup. Therefore, the flow rate of the heat exchange medium flowing into the first subgroup through the first type of second interface 201b may be greater than the flow rate of the heat exchange medium flowing into the second subgroup through the second type of second interface 202b, so that the heat exchange medium is reasonably distributed and the heat exchange efficiency is improved.

[0104] It is understandable that the heat exchange medium introduced by the connecting device 20 flows into the corresponding heat exchange channel via the first type second interface 201b or the second type second interface 202b, thereby achieving heat exchange between the heat exchange device 10 and different areas of the battery cell 2.

[0105] In some embodiments, the heat exchange requirements of the first part 2a of the battery cell 2 and the second part 2b of the battery cell 2 are different. The flow rate of the heat exchange medium in the first flow channel group 111 and the second flow channel group 121 can be controlled by controlling the flow rate of the heat exchange medium in the first type second interface 201b and the second type second interface 202b, thereby meeting the different heat exchange requirements of different areas of the battery cell 2 and improving the heat exchange efficiency and heat exchange effect.

[0106] In some embodiments, multiple first flow channel groups 111 are arranged in parallel, and multiple second flow channel groups 121 are also arranged in parallel. In this case, the connecting device 20 can be constructed in multiples, at least one connecting device 20 is connected to the multiple first flow channel groups 111 through its own second interface 20b, and at least another connecting device 20 is connected to the multiple second flow channel groups 121 through its own second interface 20b, so that each connecting device 20 can individually control the heat exchange medium flow rate of its corresponding flow channel.

[0107] In some embodiments, the portion of the heat exchange device 10 provided with the first flow channel group 111 is the first heat exchange region 11, and the portion provided with the second flow channel group 121 is the second heat exchange region 12. The first flow channel group 111 and the second flow channel group 121 are also connected in parallel, so that the temperature of the first heat exchange region 11 and the second heat exchange region 12 can be independently controlled, so that the heat exchange device 10 can achieve multi-region zone temperature control, distribute the flow of each flow channel according to the heating law of the battery cell 2 in each region, reduce the temperature difference of the battery cell 2 itself, and improve the temperature uniformity of the battery cell 2.

[0108] In some embodiments, the heat exchange assembly 1 includes two connection devices 20 , namely a first connection joint 21 and a second connection joint 22 .

[0109] In some embodiments, the first type second interface 201b can be the inlet or outlet of the heat exchange medium, and similarly, the second type second interface 202b can be the inlet or outlet of the heat exchange medium.

[0110] In some embodiments, the first type second interface 201b of the first connecting joint 21 is connected to the first port of the first flow channel group 111, and the second port of the first flow channel group 111 is connected to the second type second interface 202b of the second connecting joint 22. At this time, the first type second interface 201b of the first connecting joint 21 and the first port of the first flow channel group 111 are both heat exchange medium inlets, and the second port of the first flow channel group 111 and the second type second interface 202b of the second connecting joint 22 are both heat exchange medium outlets.

[0111] In some embodiments, the first type second interface 201b of the second connecting joint 22 is connected to the first port of the second flow channel group 121, and the second port of the second flow channel group 121 is connected to the second type second interface 202b of the first connecting joint 21. At this time, the first type second interface 201b of the second connecting joint 22 and the first port of the second flow channel group 111 are both heat exchange medium inlets, and the second port of the second flow channel group 121 and the second type second interface 202b of the first connecting joint 21 are both heat exchange medium outlets.

[0112] According to some embodiments of the present invention, Fig.13 , Fig.16 As shown, the caliber of the first type second interface 201b is different from the caliber of the second type second interface 202b. It can be understood that the flow rate of the heat exchange medium flowing into the first flow channel group 111 from the second interfaces 20b with different apertures is different, and more heat exchange medium flows through the second interface 20b with a larger aperture. Therefore, the second interface 20b with a larger aperture is suitable for connecting with a longer flow channel, so that the longer flow channel is allocated with more heat exchange medium flow, and the shorter flow channel is allocated with less heat exchange medium flow, so that the heat exchange medium is reasonably distributed and the heat exchange efficiency is improved.

[0113] According to some embodiments of the present invention, Fig.13 , Fig.16 As shown, the caliber of the first type second interface 201b is smaller than the caliber of the second type second interface 202b; the distance from the first subgroup to the connecting device 20 is smaller than the distance from the second subgroup to the connecting device 20. Here, the length of the first subgroup is smaller than the length of the second subgroup, so more heat exchange medium needs to flow through the second type second interface 202b to increase the flow rate of the heat exchange medium flowing in the second subgroup, so that the heat exchange medium is reasonably distributed and the heat exchange efficiency is improved.

[0114] According to some embodiments of the utility model, the flow passage lengths of the first subgroup and the second subgroup are different, or the flow resistances of the first subgroup and the second subgroup are different. More heat exchange medium flows through the second interface 20b with a larger aperture, so the second interface 20b with a larger aperture is suitable for communicating with a longer flow passage or a flow passage with a larger flow resistance, so that the flow passage distributes more heat exchange medium flow, thereby improving heat exchange efficiency.

[0115] According to some embodiments of the present invention, Figure 11-Figure 16As shown, there are at least two connecting devices 20 and include a first connecting joint 21 and a second connecting joint 22, each connecting device 20 includes a confluence chamber 20d and a third interface 20e, and the confluence chamber 20d and the third interface 20e are connected; the multiple branch flow paths 20c of the first connecting joint 21 are respectively connected to the first ends 201c of the multiple first flow channel groups 111, and the confluence chamber 20d of the first connecting joint 21 is connected to the first ends 201c of the multiple second flow channel groups 121; the multiple branch flow paths 20c of the second connecting joint 22 are respectively connected to the second ends 202c of the multiple second flow channel groups 121, and the confluence chamber 20d of the second connecting joint 22 is connected to the second ends 202c of the multiple first flow channel groups 111.

[0116] Specifically, the first interface 20a of the first connecting joint 21 can introduce external heat exchange medium, and the heat exchange medium enters the first flow channel group 111 from the first end 201c, and flows into the confluence cavity 20d of the second connecting joint 22 from the second end 202c of the first flow channel group 111, and then flows out from the third interface 20e of the second connecting joint 22; alternatively, the third interface 20e of the first connecting joint 21 introduces external heat exchange medium, and the heat exchange medium enters the second flow channel group 121 from the first end 201c, and flows from the second end 202c of the second flow channel group 121 to the second connecting joint 22, and then flows out from the first interface 20a of the second connecting joint 22.

[0117] The first interface 20a of the second connecting joint 22 can also introduce external heat exchange medium, and the heat exchange medium enters the second flow channel group 121 from the second end 202c, and flows into the confluence cavity 20d of the first connecting joint 21 from the first end 201c of the second flow channel group 121, and then flows out from the third interface 20e of the first connecting joint 21; or, the third interface 20e of the second connecting joint 22 introduces external heat exchange medium, and the heat exchange medium enters the first flow channel group 111 from the second end 202c, and flows from the first end 201c of the first flow channel group 111 to the first connecting joint 21, and then flows out from the first interface 20a of the first connecting joint 21.

[0118] In some embodiments, the first end 201c of the first flow channel group 111 and the first end 201c of the second flow channel group 121 are arranged at one place, and the second end 202c of the first flow channel group 111 and the second end 202c of the second flow channel group 121 are arranged at one place, so that the first flow channel group 111 and the second flow channel group 121 can be staggered in design, which is more conducive to the temperature uniformity of the heat exchange device 10 and can improve the functional integration of the first connecting joint 21 and the second connecting joint 22.

[0119] According to some embodiments of the present invention, Figure 11-Figure 16As shown, there are at least two connecting devices 20 and include a first connecting joint 21 and a second connecting joint 22, each connecting device 20 includes a confluence chamber 20d and a third interface 20e, and the confluence chamber 20d and the third interface 20e are connected; the multiple branch flow paths 20c of the first connecting joint 21 are respectively connected to the first ends 201c of the multiple first flow channel groups 111, and the confluence chamber 20d of the first connecting joint 21 is connected to the second ends 202c of the multiple first flow channel groups 111; the multiple branch flow paths 20c of the second connecting joint 22 are respectively connected to the first ends 201c of the multiple second flow channel groups 121, and the confluence chamber 20d of the second connecting joint 22 is connected to the second ends 202c of the multiple second flow channel groups 121.

[0120] Specifically, the first interface 20a of the first connecting joint 21 can introduce external heat exchange medium, and the heat exchange medium enters the first flow channel group 111 from the first end 201c, and flows into the confluence cavity 20d of the first connecting joint 21 from the second end 202c of the first flow channel group 111, and then flows out from the third interface 20e of the first connecting joint 21; alternatively, the third interface 20e of the first connecting joint 21 introduces external heat exchange medium, and the heat exchange medium enters the first flow channel group 111 from the second end 202c, and flows from the first end 201c of the first flow channel group 111 to the first connecting joint 21, and then flows out from the first interface 20a of the first connecting joint 21.

[0121] The first interface 20a of the second connecting joint 22 can also introduce external heat exchange medium, and the heat exchange medium enters the second flow channel group 121 from the first end 201c, and flows into the confluence cavity 20d of the second connecting joint 22 from the second end 202c of the second flow channel group 121, and then flows out from the third interface 20e of the second connecting joint 22; or, the third interface 20e of the second connecting joint 22 introduces external heat exchange medium, and the heat exchange medium enters the second flow channel group 121 from the second end 202c, and flows from the first end 201c of the second flow channel group 121 to the second connecting joint 22, and then flows out from the first interface 20a of the second connecting joint 22.

[0122] In some embodiments, the first end 201c of the first flow channel group 111 and the second end 202c of the first flow channel group 111 are arranged at one place, and the first end 201c of the second flow channel group 121 and the second end 202c of the second flow channel group 121 are arranged at one place, so that the first flow channel group 111 and the second flow channel group 121 are arranged neatly, which is convenient for the flow channel design of the heat exchange device 10.

[0123] In some embodiments, the heat exchange device 10 is formed with a plurality of first flow channel groups 111 and second flow channel groups 121 designed in parallel. The first flow channel groups 111 and the second flow channel groups 121 can be as follows: Figure 3 Parallel design shown.

[0124] According to some embodiments of the present invention, Figure 1 As shown, the first connection joint 21 and the second connection joint 22 are located on the same side of the heat exchange device 10. Specifically, the first connection joint 21 and the second connection joint 22 are arranged on the same side of the heat exchange device 10, which helps to connect the heat exchange device 10 with external components, reduces the difficulty of installation, and makes the structure of the heat exchange device 10 more compact, reduces the space occupied by the heat exchange component 1, provides a better layout environment for the installation of other components, and helps to improve the energy density of the battery pack 1000 using the heat exchange component 1.

[0125] According to some embodiments of the present invention, Figure 2 As shown, the heat exchange assembly 1 further includes a temperature averaging plate 30, which is disposed on the heat exchange device 10 and exchanges heat with the heat exchange device 10. In some embodiments, the heat exchange device 10 is disposed on one side of the temperature averaging plate 30 in the thickness direction, and a device that needs to dissipate heat or heat is disposed on the other side of the temperature averaging plate 30 in the thickness direction.

[0126] In some embodiments, Figure 4 As shown, the temperature equalizing plate 30 is designed with multiple diversion holes 30a, and the first end 201c and the second end 202c of each flow channel on the heat exchange device 10 are respectively connected to the multiple diversion holes 30a, and the diversion holes 30a are connected to the second interface 20b of the connecting device 20 and the confluence cavity 20d to form a heat exchange medium loop on the heat exchange device 10.

[0127] In some embodiments, the heat exchange device 10 is formed by stamping, the temperature averaging plate 30 is connected to the heat exchange device 10 by brazing, the temperature averaging plate 30 is provided with a joint fitting position 31, and the connecting device 20 is connected to the temperature averaging plate 30 by brazing. By brazing, the heat exchange device 10, the temperature averaging plate 30 and the connecting device 20 are integrated together, and the inlet and outlet of each flow channel on the heat exchange device 10 are staggered, which can realize the control of multi-region battery cells 2 according to the heat generation size, and the staggered design of the flow channels for heating and cooling is used. The heat exchange component 1 has a simple structure and is easy to mass produce.

[0128] The battery pack 1000 according to the present invention is briefly described below.

[0129] like Figure 1-Figure 20 As shown, the battery pack 1000 according to the present invention includes: a plurality of battery cells 2 and a heat exchange assembly 1, the heat exchange assembly 1 is any of the heat exchange assemblies 1 described in the above embodiments, and the heat exchange device 10 exchanges heat with the plurality of battery cells 2. In some embodiments, as Figure 1As shown, multiple battery cells 2 in the battery pack 1000 form six battery modules, and the battery modules are placed above the temperature balancing plate 30 through thermal conductive glue. The flow channel of the heat exchange device 10 is mainly arranged perpendicular to the battery cells 2. The heat generated by the battery cells 2 is transferred to the heat exchange medium in the flow channel through the temperature balancing plate 30, so that the heat exchange medium changes from liquid to gas, and the heat exchange medium absorbs heat during phase change, thereby taking away the heat generated by the battery cells 2 to achieve cooling of the battery cells 2; or, the gaseous heat exchange medium changes phase to liquid in the flow channel of the heat exchange device 10, and transfers the carried heat to the battery cells 2 through the temperature balancing plate 30 to achieve heating of the battery cells 2. Since the battery pack 1000 according to the utility model is provided with the heat exchange assembly 1 of the above embodiment, the battery pack 1000 has better stability and power supply endurance.

[0130] According to some embodiments of the present invention, Figure 5-Figure 9 As shown, the heat exchange device 10 is provided with a first heat exchange region 11 and a second heat exchange region 12, the first heat exchange region 11 includes a plurality of first flow channel groups 111, the second heat exchange region 12 includes a second flow channel group 121, the first heat exchange region 11 exchanges heat with the first part 2a of the plurality of battery cells 2, and the second heat exchange region 12 exchanges heat with the second part 2b of the plurality of battery cells 2.

[0131] In some embodiments, the electrode region of the battery cell 2 is the first part 2a, and the non-electrode region of the battery cell 2 is the second part 2b. When the battery cell 2 is working, the electrode region of the battery cell 2 generates a large amount of heat, and the non-electrode region of the battery cell 2 generates a small amount of heat. The temperature of the first part 2a of the battery cell 2 is higher than the temperature of the second part 2b. It is understood that when the battery cell 2 is working under high-power charging and discharging conditions, the heat generated by the electrode region of the battery cell 2 is much greater than the heat generated by the non-electrode region of the battery cell 2, so that the electrode region of the battery cell 2 is rapidly heated, and the temperature sampling point is placed on the battery cell 2. The electrode area of ​​the battery cell 2 causes the temperature of the temperature sampling point to rise rapidly to the current limiting point, shortening the high-power charging time and seriously affecting the charging performance of the whole pack. Under low-temperature heating conditions, due to the high heat generated in the electrode area of ​​the battery cell 2, the electrode area of ​​the battery cell 2 heats up quickly and quickly reaches the suitable temperature for high-power charging. However, the temperature of the non-electrode area of ​​the battery cell 2 is still relatively low. At this time, high-power charging and discharging will cause lithium deposition in the battery cell 2, damage the microstructure of the battery cell 2, reduce the service life and charging capacity of the battery cell 2, and in severe cases, cause a short circuit in the battery cell 2, causing thermal runaway.

[0132] Therefore, the present application divides the battery cell 2 into an electrode area and a non-electrode area, and designs two sets of independent flow channels in the electrode area and the non-electrode area to perform independent heat exchange on the electrode area and the non-electrode area respectively. The two sets of flow channel loops are independently controlled, and the heat exchange medium flow can be distributed in real time according to the actual heating situation of the battery cell 2 to improve the cooling performance of the heat exchange device 10 and the heat exchange efficiency of the battery pack 1000.

[0133] like Figure 5-Figure 9 As shown, the battery module is divided into three parts according to its arrangement, and each part is divided into an electrode area and a non-electrode area, and each area has multiple flow channels.

[0134] In some embodiments, Figure 11-Figure 16 As shown, the first interface 20a and the third interface 20e of the first connection joint 21 are staggered with the first interface 20a and the third interface 20e of the second connection joint 22. The first interface 20a and the third interface 20e of the first connection joint 21 can be a medium inlet or a medium outlet; the first interface 20a and the third interface 20e of the second connection joint 22 can be a medium inlet or a medium outlet. In the cooling condition, the medium inlet of the first connection joint 21 is the total inlet of multiple flow channels in the non-electrode area, and the total outlet of multiple flow channels in the non-electrode area is the medium outlet of the second connection joint 22; the medium inlet of the second connection joint 22 is the total inlet of multiple flow channels in the electrode area, and the total outlet of multiple flow channels in the electrode area is the medium outlet of the first connection joint 21. This staggered design is conducive to the staggered design of hot and cold flow channels, which is more conducive to the temperature uniformity of the battery pack 1000.

[0135] The flow channels can be divided into flow channels in a first area 101 , flow channels in a second area 102 , and flow channels in a third area 103 according to the distance between the flow channels and the connecting device 20 .

[0136] like Figure 7 As shown, the flow channel inlet and outlet located in the first area 101 of the first flow channel group 111 are respectively arranged at two locations, the flow channel inlet and outlet at one location can be used to flow in low-temperature heat exchange medium or flow out high-temperature heat exchange medium, and the flow channel inlet and outlet at the other location can be used to flow out low-temperature heat exchange medium or flow in high-temperature heat exchange medium; the flow channel inlet and outlet located in the second area 102 of the first flow channel group 111 are respectively arranged at two locations, the flow channel inlet and outlet at one location can be used to flow in low-temperature heat exchange medium or flow out high-temperature heat exchange medium, and the flow channel inlet and outlet at the other location can be used to flow out low-temperature heat exchange medium or flow in high-temperature heat exchange medium; the flow channel inlet and outlet located in the third area 103 of the first flow channel group 111 are respectively arranged at two locations, the flow channel inlet and outlet at one location can be used to flow in low-temperature heat exchange medium or flow out high-temperature heat exchange medium, and the flow channel inlet and outlet at the other location can be used to flow out low-temperature heat exchange medium or flow in high-temperature heat exchange medium.

[0137] like Fig.10As shown, the flow channel inlet and outlet located in the first area 101 of the second flow channel group 121 are respectively arranged at two locations, the flow channel inlet and outlet at one location can be used to flow in low-temperature heat exchange medium or flow out high-temperature heat exchange medium, and the flow channel inlet and outlet at the other location can be used to flow out low-temperature heat exchange medium or flow in high-temperature heat exchange medium; the flow channel inlet and outlet located in the second area 102 of the second flow channel group 121 are respectively arranged at two locations, the flow channel inlet and outlet at one location can be used to flow in low-temperature heat exchange medium or flow out high-temperature heat exchange medium, and the flow channel inlet and outlet at the other location can be used to flow out low-temperature heat exchange medium or flow in high-temperature heat exchange medium; the flow channel inlet and outlet located in the third area 103 of the second flow channel group 121 are respectively arranged at two locations, the flow channel inlet and outlet at one location can be used to flow in low-temperature heat exchange medium or flow out high-temperature heat exchange medium, and the flow channel inlet and outlet at the other location can be used to flow out low-temperature heat exchange medium or flow in high-temperature heat exchange medium.

[0138] In some embodiments of the present application, the thermal management system of the battery pack 1000 has a cooling condition and a heating condition, and the thermal management system of the battery pack 1000 also includes a compressor, a condenser, a throttle valve and other structures.

[0139] Under cooling conditions, the heat exchange medium is compressed by the compressor into a high-temperature and high-pressure gas, then condensed into a liquid heat exchange medium by the condenser, and then becomes a two-phase medium through the throttle valve, and then enters the heat exchange device 10 from the medium inlet of the connecting device 20. Two throttle valves are arranged at the total inlet of the flow channel of the heat exchange device 10 of the thermal management system to control the flow in the electrode area and the non-electrode area respectively. Assuming the flow in the non-electrode area is m and the flow in the electrode area is n, the design is m<n.

[0140] Specifically, the first interface 20a of the first connecting joint 21 is the medium inlet, and the first interface 20a is connected to the first flow channel group 111 of the non-electrode area. After the two-phase medium passes through the first end 201c of the first flow channel group 111, a two-phase annular flow will be formed. Under this flow shape, the heat exchange coefficient of the heat exchange medium is high, which is conducive to improving the cooling capacity. In addition, the flow channel lengths of the first area 101, the second area 102, and the third area 103 are different, and the pressure loss and heat loss along the way are: the first area 101 < the second area 102 < the third area 103. Therefore, the required flow rate of each area is: the first area 101 < the second area 102 < the third area 103. Assuming that the cooling inlet diameters of the first area 101, the second area 102, and the third area 103 are a, b, and c respectively, then a < b < c. Each flow channel area is divided into three branches, and after flowing through the heat exchange device 10, it flows back to the confluence chamber 20d of the second connection joint 22. The heat exchange medium flows from the confluence chamber 20d of the second connection joint 22 to the third interface 20e and flows out of the second connection joint 22. Similarly, the first interface 20a of the second connection joint 22 is the medium inlet, and the first interface 20a is connected to the second flow channel group 121 of the electrode area. The specific connection relationship can refer to the connection relationship of the first connection joint 21 in this paragraph, which will not be repeated here.

[0141] Under the heating condition, the flow direction of the heat exchange medium is opposite to that of the heat exchange medium in the cooling condition. The heat exchange medium is compressed into a high-temperature and high-pressure gas by the compressor, and after being throttled by the ball valve, it directly flows into the heat exchange device 10 through the connecting device 20 to heat the battery cell 2. Two ball valves are provided at the total inlet of the flow channel of the heat exchange device 10 of the thermal management system to control the flow in the non-electrode area and the electrode area respectively. Assuming the flow in the non-electrode area is m' and the flow in the electrode area is n', the design is m'>n'.

[0142] Specifically, the third interface 20e of the first connecting joint 21 is the medium inlet, and the third interface 20e is connected to the second flow channel group 121 of the electrode area. The magnitude of the pressure loss and heat loss along the process is: the first area 101 < the second area 102 < the third area 103. The heat exchange medium is parallelly diverted from the third interface 20e to the confluence chamber 20d, so that the flow distribution amount is: the first area 101 < the second area 102 < the third area 103, and the flow is reasonably distributed. Similarly, the flow channel is divided into three heating branches, and finally converges to the outlet of the second flow channel group 121. The third interface 20e of the second connecting joint 22 is the medium inlet, and the third interface 20e is connected to the first flow channel group 111 of the non-electrode area. The flow form of the heat exchange medium can refer to the flow form of the second flow channel group 121 in this paragraph, and will not be repeated here.

[0143] The present application reasonably distributes the flow in three areas through structural optimization, so that the heat exchange device 10 can efficiently exchange heat, and is beneficial to improving the temperature uniformity of the heat exchange device 10, which is beneficial to extending the life of the battery cell 2. This form can be expanded to flow channel diversion in more areas, and the application of the present application is more extensive.

[0144] Under cooling conditions, by designing the connection device 20 for flow diversion so as to reduce the pressure drop of the heat exchange device 10, the temperature uniformity performance of the heat exchange device 10 can be improved, thereby improving the energy efficiency of the entire thermal management system. Under heating conditions, by designing a confluence cavity 20d on the connection device 20 for parallel diversion, a larger flow rate is allocated to areas with longer flow channels, and a smaller flow rate is allocated to areas with shorter flow channels. The heat exchange component 1 of the present application takes into account both cooling and heating conditions, and in cooling conditions, the heat exchange medium will form a two-phase annular flow after passing through the diversion structure of the connection device 20. In this form, the heat exchange coefficient of the heat exchange medium is high, which is beneficial to improving the heat exchange coefficient of the heat exchange device 10 and improving the cooling capacity of the battery cell 2.

[0145] The present application is applicable to a multi-zone cooling / heating solution for a battery pack 1000 in which short-blade battery cells 2 form multiple modules. This module form results in many branches of the heat exchange device 10, and the heat generation in the electrode area and the non-electrode area is uneven, so regional diversion is more difficult. The present application realizes flow control by region through different structures. In cooling conditions, the flow rate of the heat exchange medium in the flow channel of the corresponding heat exchange device 10 decreases as the heat generation of the battery cell 2 decreases. In heating conditions, the flow rate of the heat exchange medium in the flow channel of the corresponding heat exchange device 10 decreases as the heat generation of the battery cell 2 increases. This realizes on-demand distribution of the heat exchange medium, improves the heat exchange efficiency of the heat exchange medium, reduces the temperature difference between the battery cells 2, improves the temperature uniformity of the battery cells 2, reduces the flow resistance, improves the cooling and heating efficiency, and helps to improve the stability and power supply endurance of the battery pack 1000.

[0146] The vehicle 10000 according to the present invention is briefly described below.

[0147] like Fig.21 , Fig. 22 As shown, the vehicle 10000 according to the utility model includes the connecting device 20 described in any one of the above embodiments or includes the heat exchange component 1 described in any one of the above embodiments or includes the battery pack 1000 described in any one of the above embodiments. Since the vehicle 10000 according to the utility model is provided with the battery pack 1000 of the above embodiments, the vehicle 10000 is safe to use and has better endurance.

[0148] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0149] Although embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. A connecting device (20), characterized in that: The connecting device (20) is provided with a first interface (20a) and a plurality of second interfaces (20b), the first interface (20a) is in communication with the plurality of second interfaces (20b), the first interface (20a) is used to connect to an external pipeline, and the plurality of second interfaces (20b) are used to connect to the heat exchange device (10); wherein A flow path is formed inside the connection device (20), a first end (201c) of the flow path is connected to the first interface (20a), the flow path has a plurality of second ends (202c), each second end (202c) is connected to at least one of the second interfaces (20b), so as to form a plurality of branch flow paths (20c) between the first interface (20a) and the second interface (20b).

2. The connection device (20) according to claim 1, characterized in that The apertures of the plurality of second interfaces (20b) are different, and / or the pipe diameters of the plurality of branch flow paths (20c) are different, and / or the plurality of branch flow paths (20c) are provided with flow regulating devices.

3. The connection device (20) according to claim 1, characterized in that: The branch flow path (20c) comprises a first branch flow path (203c) and a second branch flow path (204c); the first ends (201c) of the first branch flow path (203c) and the second branch flow path (204c) are both connected to the first interface (20a); the second end (202c) of the first branch flow path (203c) is connected to at least two of the second interfaces (20b); and the second end (202c) of the second branch flow path (204c) is connected to one of the second interfaces (20b).

4. The connection device (20) according to claim 3, characterized in that There are multiple second branch flow paths (204c).

5. The connection device (20) according to claim 1, characterized in that: The connecting device (20) is further provided with a confluence chamber (20d) and a third interface (20e); the confluence chamber (20d) and the third interface (20e) are in communication; the third interface (20e) is used for connecting to an external pipeline; and the confluence chamber (20d) is used for connecting to the heat exchange device (10).

6. A heat exchange component (1), characterized in that: include: A heat exchange device (10), wherein the heat exchange device (10) is formed with a heat exchange flow channel; A connecting device (20), wherein the connecting device (20) is constructed as a connecting device (20) according to any one of claims 1 to 5, wherein a plurality of the second interfaces (20b) are connected to the heat exchange device (10) and are suitable for connecting the first interface (20a) with the heat exchange channel.

7. The heat exchange assembly (1) according to claim 6, characterized in that: The heat exchange flow channel comprises a first flow channel group (111) and a second flow channel group (121); the first flow channel group (111) is suitable for heat exchange with a first part (2a) of a battery cell (2); the second flow channel group (121) is suitable for heat exchange with a second part (2b) of a battery cell (2); when the battery cell (2) is working, the temperature of the first part (2a) of the battery cell (2) is higher than the temperature of the second part (2b).

8. The heat exchange assembly (1) according to claim 7, characterized in that: The plurality of second interfaces (20b) include a first type of second interface (201b) and a second type of second interface (202b); The first flow channel group (111) includes a plurality of subgroups, at least two of the plurality of subgroups are connected in parallel, the two subgroups connected in parallel are respectively a first subgroup and a second subgroup, a first port of the first subgroup is connected to the first type of second interface (201b), and a first port of the second subgroup is connected to the second type of second interface (202b).

9. The heat exchange assembly (1) according to claim 8, characterized in that: The caliber of the first type second interface (201b) is different from the caliber of the second type second interface (202b).

10. The heat exchange assembly (1) according to claim 9, characterized in that: The caliber of the first type second interface (201b) is smaller than the caliber of the second type second interface (202b); and the distance from the first subgroup to the connection device (20) is smaller than the distance from the second subgroup to the connection device (20).

11. The heat exchange component (1) according to claim 9 or 10, characterized in that: The flow channel lengths of the first subgroup and the second subgroup are different, or the flow resistances of the first subgroup and the second subgroup are different.

12. The heat exchange assembly (1) according to claim 7, characterized in that: The connecting devices (20) are at least two and include a first connecting joint (21) and a second connecting joint (22), each of the connecting devices (20) includes a confluence cavity (20d) and a third interface (20e), and the confluence cavity (20d) and the third interface (20e) are in communication; The plurality of branch flow paths (20c) of the first connection joint (21) are respectively connected to the first ends (201c) of the plurality of first flow channel groups (111), and the confluence cavity (20d) of the first connection joint (21) is connected to the first ends (201c) of the plurality of second flow channel groups (121); The multiple branch flow paths (20c) of the second connecting joint (22) are respectively connected to the second ends (202c) of the multiple second flow channel groups (121), and the confluence cavity (20d) of the second connecting joint (22) is connected to the second ends (202c) of the multiple first flow channel groups (111).

13. The heat exchange assembly (1) according to claim 7, characterized in that: The connecting devices (20) are at least two and include a first connecting joint (21) and a second connecting joint (22), each of the connecting devices (20) includes a confluence cavity (20d) and a third interface (20e), and the confluence cavity (20d) and the third interface (20e) are in communication; The plurality of branch flow paths (20c) of the first connection joint (21) are respectively connected to the first ends (201c) of the plurality of first flow channel groups (111), and the confluence cavity (20d) of the first connection joint (21) is connected to the second ends (202c) of the plurality of first flow channel groups (111); The multiple branch flow paths (20c) of the second connecting joint (22) are respectively connected to the first ends (201c) of the multiple second flow channel groups (121), and the confluence cavity (20d) of the second connecting joint (22) is connected to the second ends (202c) of the multiple second flow channel groups (121).

14. The heat exchange component (1) according to claim 12 or 13, characterized in that: The first connection joint (21) and the second connection joint (22) are located on the same side of the heat exchange device (10).

15. The heat exchange assembly (1) according to claim 6, characterized in that: Also includes: A temperature balancing plate (30), the temperature balancing plate (30) being arranged on the heat exchange device (10) and performing heat exchange with the heat exchange device (10).

16. A battery pack, characterized in that: include: A plurality of battery cells (2); A heat exchange component (1), wherein the heat exchange component (1) is a heat exchange component (1) according to any one of claims 6 to 15, and the heat exchange device (10) exchanges heat with the plurality of battery cells (2).

17. The battery pack according to claim 16, characterized in that: The heat exchange device (10) is provided with a first heat exchange region (11) and a second heat exchange region (12); the first heat exchange region (11) includes a plurality of first flow channel groups (111); the second heat exchange region (12) includes a second flow channel group (121); the first heat exchange region (11) performs heat exchange with a first portion (2a) of a plurality of battery cells (2); and the second heat exchange region (12) performs heat exchange with a second portion (2b) of a plurality of battery cells (2).

18. A vehicle, characterized in that: It comprises a connecting device (20) according to any one of claims 1 to 5 or a heat exchange component (1) according to any one of claims 6 to 15 or a battery pack (1000) according to claim 16 or 17.

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