Liquid cooling connector and battery pack

Abstract

The utility model discloses a liquid cooling connector and a battery pack, and relates to the technical field of batteries. A first flow channel and a second flow channel are arranged in a first connecting section and a second connecting section in the liquid cooling connector, axes of the first flow channel and the second flow channel are staggered, a third flow channel is arranged in a third connecting section, the first flow channel and the second flow channel are communicated through the third flow channel, and the third flow channel obliquely extends from one of the first flow channel and the second flow channel to the other one of the first flow channel and the second flow channel. Therefore, when the cooling liquid flows between the first flow channel and the second flow channel, the obliquely arranged third flow channel can adjust the flow speed of the cooling liquid, the cooling liquid is prevented from directly impacting the interior of the liquid cooling plate, and the liquid cooling plate is prevented from being damaged due to long-term impact; meanwhile, the number of the first flow channels, the number of the second flow channels and the number of the third flow channels are at least two, each first flow channel, each second flow channel and each third flow channel form an independent flow channel, the independent flow channels are arranged at intervals and are independent of one another, and the third flow channels are arranged in a manner of being close to one another and extending, so that the space of the liquid cooling connector is reasonably utilized, and the liquid cooling connector is flexibly suitable for different use scenes.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a liquid cooling joint and a battery pack. Background Art

[0002] Battery packs generate a significant amount of heat during high-rate discharge. Therefore, cooling is necessary to prevent overheating, which could negatively impact the pack's capacity, power, charge / discharge efficiency, safety, and lifespan. Liquid cooling is typically used for this purpose. Coolant flows through cold plates and pipes, removing heat from the battery pack and reducing its temperature.

[0003] In the related art, when the coolant flows into the liquid cooling plate, it will cause a certain degree of impact on the inside of the liquid cooling plate, which may easily cause the liquid cooling plate to be damaged due to long-term impact. Utility Model Content

[0004] The present application aims to provide a liquid cooling joint and a battery pack, which can solve the problem in the battery pack cooling structure of the related art that when the coolant flows in, it will cause a certain degree of impact on the inside of the liquid cooling plate, causing the liquid cooling plate to be easily damaged due to long-term impact.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application proposes a liquid cooling joint for connecting a vehicle body cooling system and a battery pack liquid cooling plate, comprising: a first connecting section, a second connecting section and a third connecting section, wherein a first flow channel is provided in the first connecting section, a second flow channel is provided in the second connecting section, and the axis of the first flow channel and the axis of the second flow channel are staggered with each other; one end of the third connecting section is connected to the first connecting section, and the other end is connected to the second connecting section, and a third flow channel is provided in the third connecting section, the third flow channel connects the first flow channel and the second flow channel, and the third flow channel extends obliquely from one of the first flow channel and the second flow channel to the other; wherein the number of the first flow channel, the second flow channel and the third flow channel is at least two, each of the first flow channel, the second flow channel and the third flow channel forms an independent flow channel, the independent flow channels are arranged at intervals, and the third flow channels are extended in a direction close to each other.

[0007] Optionally, the axis of the first flow channel and the axis of the third flow channel satisfy one of the following conditions: there is a first angle α between the axis of the first flow channel and the axis of the third flow channel and 30°≤α<90°; there is a second angle β between the axis of the second flow channel and the axis of the third flow channel and 30°≤β<90°; the axis of the first flow channel is parallel to the axis of the second flow channel.

[0008] Optionally, the liquid cooling joint further includes a mounting portion, which is provided at one end of the second connecting section close to the third connecting section, and a mounting hole is provided in the mounting portion for connecting to the shell of the battery pack.

[0009] Optionally, a hollow structure is provided in the mounting portion.

[0010] Optionally, the liquid-cooling joint further includes a sealing member, and a sealing groove is provided on a side of the mounting portion facing away from the first connecting section, and the sealing groove is used for mounting the sealing member.

[0011] Optionally, at least two of the first connecting section, the second connecting section and the third connecting section are integrally formed parts;

[0012] Alternatively, the second connecting section and the mounting portion are an integrally formed part.

[0013] Optionally, a reinforcing rib is provided between one end of the third connecting section facing the mounting portion and the mounting portion, and two ends of the reinforcing rib are respectively connected to the third connecting section and the mounting portion.

[0014] Optionally, the liquid cooling joint further comprises a fastener, which is disposed in the mounting hole and is used to connect the mounting portion and the housing of the battery pack;

[0015] And / or, there are multiple mounting holes, and the multiple mounting holes are arranged at intervals.

[0016] Optionally, a first connector is provided at one end of the first connecting section facing away from the second connecting section, and the first connector is used to connect to a vehicle cooling system;

[0017] And / or, a second connector is provided at one end of the second connecting section facing away from the first connecting section, and the second connector is used to connect to the battery pack liquid cooling plate.

[0018] In a second aspect, an embodiment of the present application proposes a battery pack, comprising: a liquid cooling joint as described in any one of the above items.

[0019] In an embodiment of the present application, the liquid cooling joint includes a first connecting section, a second connecting section and a third connecting section that are connected to each other. A first flow channel and a second flow channel with axes staggered from each other are provided in the first connecting section and the second connecting section, and a third flow channel is provided in the third connecting section. The third flow channel connects the first flow channel and the second flow channel, and extends obliquely from one of the first flow channel and the second flow channel to the other; so that when the coolant flows between the first flow channel and the second flow channel, the obliquely arranged third flow channel can regulate the flow rate of the coolant, avoid the coolant directly impacting the interior of the liquid cooling plate, and avoid the liquid cooling plate from being damaged by long-term impact; at the same time, the number of the first flow channel, the second flow channel and the third flow channel is at least two, each first flow channel, the second flow channel and the third flow channel forms an independent flow channel, and each third flow channel is obliquely extended in a direction away from or close to each other, thereby rationally utilizing the space of the liquid cooling joint and being able to flexibly adapt to different usage scenarios.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic diagram of a liquid cooling joint according to an embodiment of the present application;

[0023] Figure 2 According to the embodiment of this application Figure 1 Cross-sectional view along line AA;

[0024] Figure 3 According to the embodiment of this application Figure 1 Exploded diagram;

[0025] Figure 4 This is a schematic diagram of a liquid cooling joint from another perspective according to an embodiment of the present application.

[0026] Reference numerals:

[0027] 1: First connecting section; 11: First flow channel; 12: First joint; 2: Second connecting section; 21: Second flow channel; 22: Second joint; 3: Third connecting section; 31: Third flow channel; 4: Mounting portion; 41: Mounting hole; 411: Fastener; 42: Hollow structure; 43: Sealing groove; 44: Sealing element; 5: Reinforcement rib; α: First angle; β: Second angle. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0030] In this application, the term "parallel" includes not only the absolutely parallel case, but also the roughly parallel case conventionally recognized in engineering, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°; at the same time, "perpendicular" includes not only the absolutely perpendicular case, but also the roughly perpendicular case conventionally recognized in engineering, such as "perpendicular" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only the absolutely equal case, but also the roughly equal case conventionally recognized in engineering, which means there may be certain errors, such as the state where the tolerance range is -1% to 1%.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] Below, in conjunction with the accompanying drawings, a liquid cooling connector and a battery pack provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0034] refer to Figure 1 and Figure 2 According to some embodiments of the present application, a liquid cooling joint is used to connect a vehicle body cooling system and a battery pack liquid cooling plate, including: a first connecting section 1, a second connecting section 2, and a third connecting section 3, wherein the first connecting section 1 is provided with a first flow channel 11, and the second connecting section 2 is provided with a second flow channel 21, and the axis of the first flow channel 11 and the axis of the second flow channel 21 are staggered with each other; one end of the third connecting section 3 is connected to the first connecting section 1, and the other end is connected to the second connecting section 2, and a third flow channel 31 is provided in the third connecting section 3, the third flow channel 31 connects the first flow channel 11 and the second flow channel 21, and the third flow channel 31 extends obliquely from one of the first flow channel 11 and the second flow channel 21 to the other; wherein the number of the first flow channel 11, the second flow channel 21, and the third flow channel 31 is at least two, each of the first flow channel 11, the second flow channel 21, and the third flow channel 31 forms an independent flow channel, the independent flow channels are arranged at intervals, and the third flow channels 31 are arranged to extend close to each other.

[0035] In an embodiment of the present application, the liquid cooling joint includes a first connecting section 1, a second connecting section 2 and a third connecting section 3 that are connected to each other. A first flow channel 11 and a second flow channel 21 with axes staggered from each other are provided in the first connecting section 1 and the second connecting section 2, and a third flow channel 31 is provided in the third connecting section 3. The third flow channel 31 connects the first flow channel 11 and the second flow channel 21, and extends obliquely from one of the first flow channel 11 and the second flow channel 21 to the other; thereby, when the coolant flows between the first flow channel 11 and the second flow channel 21, the inclined third flow channel 31 can regulate the flow rate of the coolant, thereby preventing the coolant from directly impacting the interior of the liquid cooling plate, and preventing the liquid cooling plate from being damaged by long-term impact. At the same time, the number of the first flow channel 11, the second flow channel 21, and the third flow channel 31 is set to at least two, and each first flow channel 11, the second flow channel 21, and the third flow channel 31 forms an independent flow channel. The independent flow channels are arranged at intervals and are independent of each other, and each third flow channel 31 is inclined and extended in a direction away from or close to each other, thereby rationally utilizing the space of the liquid cooling joint and being able to flexibly adapt to different usage scenarios.

[0036] In specific applications, refer to Figure 2 The axis of the first flow channel 11 and the axis of the second flow channel 12 are staggered with each other. The third flow channel 31 can be arranged to extend obliquely from the first flow channel 11 to the second flow channel 12, or can be arranged to extend obliquely from the second flow channel 12 to the first flow channel 11. Those skilled in the art can set it according to specific needs, and this application does not impose any restrictions on this.

[0037] It is understandable that the number of the first flow channel 11, the second flow channel 21, and the third flow channel 31 is at least two, and each of the first flow channel 11, the second flow channel 21, and the third flow channel 31 forms an independent flow channel, so that at least two independent flow channels are provided in the liquid-cooling joint. Taking two independent flow channels as an example: one independent flow channel can be used to connect to the inlet of the liquid-cooling plate of the battery pack, and the other can be used to connect to the outlet of the liquid-cooling plate of the battery pack. Compared with the method in the related art where the inlet and outlet of the liquid-cooling plate are each independently connected to a liquid-cooling joint, the liquid-cooling joint structure of the present application is more compact, can adapt to smaller spaces, and avoid interference with other components.

[0038] It is understandable that the space where the liquid cooling joint is generally located is limited. Integrating the water inlet and outlet of the liquid cooling joint on one liquid cooling joint can save layout space and facilitate the arrangement of other components.

[0039] Understandably, reference Figure 2 , at least two independent flow channels are formed in the liquid cooling joint, wherein one independent flow channel approaches or moves away from the other independent flow channel. Specifically, Figure 2 As shown in the figure, the third flow channel 31 of an independent flow channel extends obliquely from the first flow channel 11 to the second flow channel 21, so that the independent flow channel extends close to another independent flow channel; similarly, the third flow channel 31 of an independent flow channel extends obliquely from the second flow channel 21 to the first flow channel 11, so that the independent flow channel extends away from another independent flow channel; this makes it easier to carry out spatial layout to meet different connection spaces and adapt to different usage scenarios.

[0040] In some embodiments of the present application, the axes of the plurality of third flow channels 31 extend and intersect, so that the overall structure of the liquid-cooling joint is more compact and suitable for installation in a limited space.

[0041] Taking the two third flow channels 31 as an example: the two third flow channels 31 can be arranged to extend obliquely toward each other, or to extend obliquely toward each other. Those skilled in the art can set them according to specific needs, and this application does not impose any restrictions on this.

[0042] refer to Figure 2In some embodiments of the present application, the axis of the first flow channel 11 and the axis of the third flow channel 31 form a first angle α, which satisfies: 30°≤α<90°.

[0043] In the embodiment of the present application, a first angle α between the axis of the first flow channel 11 and the axis of the third flow channel 31 is set to be greater than or equal to 30° and less than 90°, so as to ensure that when the coolant flows through the first flow channel 11 and the third flow channel 31, the speed of the coolant is reduced while the side wall of the third flow channel 31 is not excessively impacted.

[0044] In specific applications, when the first angle α is less than 30°, it cannot reduce the flow rate of the coolant flowing through; and when the first angle α is greater than or equal to 90°, the coolant flowing through will have a strong impact on the side wall of the third flow channel 31, which may easily cause damage to the third flow channel 31 over a long period of time, affecting the normal use of the liquid cooling joint.

[0045] In specific applications, the first angle α between the axis of the first flow channel 11 and the axis of the third flow channel 31 can be set to any value such as 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 89°, or a range between any two values.

[0046] refer to Figure 2 In some other embodiments of the present application, the axis of the second flow channel 21 and the axis of the third flow channel 31 form a second angle β, which satisfies: 30°≤β<90°.

[0047] In the embodiment of the present application, a second angle β is set between the axis of the second flow channel 21 and the axis of the third flow channel 31, which is greater than or equal to 30° and less than 90°, to ensure that when the coolant flows from the second flow channel 21 to the third flow channel 31, the speed of the coolant is reduced and the side wall of the third flow channel 31 is not excessively impacted; or when the coolant flows from the third flow channel 31 to the second flow channel 21, the speed of the coolant is not too low, thereby ensuring the normal flow of the coolant.

[0048] In specific applications, the second angle β between the axis of the second flow channel 21 and the axis of the third flow channel 31 can be set to any value such as 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 89°, or a range between any two values.

[0049] refer to Figure 2 In some embodiments of the present application, the axis of the first flow channel 11 is parallel to the axis of the second flow channel 21 .

[0050] In the embodiment of the present application, by setting the axis of the first flow channel 11 and the axis of the second flow channel 21 to be parallel, the liquid cooling joint can be better connected to the vehicle cooling system or the liquid cooling plate of the battery pack.

[0051] refer to Figure 1 and Figure 3 In some embodiments of the present application, the liquid cooling joint further includes a mounting portion 4, which is disposed at one end of the second connecting section 2 close to the third connecting section 3, and a mounting hole 41 is provided in the mounting portion 4 for connecting to the shell of the battery pack.

[0052] In an embodiment of the present application, a mounting portion 4 is provided at one end of the second connecting section 2 close to the third connecting section 3. The mounting portion 4 is connected to the shell of the battery pack through a mounting hole 41 provided therein, thereby fixing the liquid cooling joint and ensuring the stability and reliability of the liquid cooling joint during use.

[0053] In a specific application, the second connecting section 2 is generally connected to the liquid cooling plate of the battery pack. After the second connecting section 2 is connected to the liquid cooling plate, the bolt is passed through the mounting hole 41 of the mounting portion 4 and screwed to the housing of the battery pack.

[0054] It can be understood that the mounting portion 4 can specifically be a flange, so that the liquid cooling joint is tightly connected to the shell of the battery pack, and is easy to assemble and disassemble, making it convenient for operators to perform maintenance and inspection, and has strong sealing properties, thereby avoiding leakage between the liquid cooling joint and the liquid cooling plate of the battery pack.

[0055] refer to Figure 4 In some embodiments of the present application, a hollow structure 42 is provided in the mounting portion 4.

[0056] In some embodiments of the present application, a hollow structure 42 is provided in the mounting portion 4 , thereby reducing the overall weight of the liquid cooling joint while ensuring the bearing capacity of the mounting portion.

[0057] In a specific application, a plurality of hollow structures 42 are provided, and the plurality of hollow structures 42 are arranged at intervals in the mounting portion 4 to further reduce the weight of the liquid cooling joint.

[0058] refer to Figure 3 and Figure 4 In some embodiments of the present application, a sealing groove 43 is provided on a side of the mounting portion 4 facing away from the first connecting section 1 , and the sealing groove 43 is used to install a sealing member 44 .

[0059] In the embodiment of the present application, a sealing groove 43 is provided on the side of the mounting portion 4 facing the second connecting section 2, and a sealing member 44 is installed in the sealing groove 43, so that the liquid cooling joint and the battery pack shell are sealed and connected through the sealing member 44, thereby ensuring that the liquid cooling joint has good air tightness and avoiding leakage of the coolant.

[0060] In specific applications, the second connecting section 2 is generally connected to the liquid cooling plate of the battery pack, and the sealing groove 43 and the seal 44 are arranged on the side of the mounting portion 4 facing the second connecting section 2, thereby improving the airtightness between the liquid cooling joint and the battery pack shell.

[0061] It is understandable that the sealing member 44 includes but is not limited to: a sealing ring, a sealing gasket, etc., and those skilled in the art can select them according to their needs, and this application does not impose any restrictions on this.

[0062] refer to Figure 1 and Figure 3 In the embodiment of the present application, the first connecting section 1, the second connecting section 2, the third connecting section 3 and the mounting portion 4 are an integrally formed part.

[0063] In the embodiment of the present application, the first connecting section 1, the second connecting section 2, the third connecting section 3 and the mounting portion 4 are integrally formed parts, thereby improving the overall structural strength of the liquid cooling joint, thereby reducing the impact of the high-speed flowing coolant on the liquid cooling joint during operation of the liquid cooling system, causing the risk of deformation or even failure of the liquid cooling joint, thereby ensuring the durability of the liquid cooling joint.

[0064] In specific applications, the processing methods of the one-piece molded parts include but are not limited to: injection molding, insert molding, nano injection molding, etc. Those skilled in the art can choose according to their needs, and this application does not impose any restrictions on this.

[0065] In other embodiments of the present application, the first connecting segment 1, the second connecting segment 2 and the third connecting segment 3 are integrally formed parts, so that the mounting portion 4 can be processed separately and then connected to the second connecting segment 2, thereby reducing the difficulty and cost of processing the liquid cooling joint.

[0066] In other embodiments of the present application, the second connecting section 2 and the mounting portion 4 are integrally formed, thereby further reducing the difficulty and cost of processing the liquid cooling joint; the first connecting section 1 and the third connecting section 3 are processed separately and then connected to the second connecting section 2 in sequence, so that the operator can combine them according to actual needs to flexibly adapt to different application scenarios.

[0067] In other embodiments of the present application, the second connecting segment 2, the third connecting segment 3 and the mounting portion 4 are integrally formed parts. The first connecting segment 1 is processed separately and then connected to the third connecting segment. This reduces the processing difficulty of the liquid cooling joint on the one hand, and facilitates flexible combination on the other hand.

[0068] refer to Figure 1 and Figure 3 In the embodiment of the present application, a reinforcing rib 5 is provided between one end of the third connecting section 3 facing the mounting portion 4 and the mounting portion 4 .

[0069] In the embodiment of the present application, a reinforcing rib 5 is provided between one end of the third connecting section 3 facing the mounting portion 4 and the mounting portion 4, thereby improving the connection stability and structural strength of the third connecting section 3 and ensuring the reliability of the liquid cooling joint.

[0070] refer to Figure 3 and Figure 4 In some embodiments of the present application, the liquid cooling joint further includes a fastener 411 , which is disposed in the mounting hole 41 and is used to connect the mounting portion 4 and the battery pack housing.

[0071] In the embodiment of the present application, by arranging a fastener 411 in the mounting hole 41, it is convenient for the operator to connect the liquid cooling connector and the battery pack shell. On the one hand, it is convenient for the operator to disassemble and assemble the liquid cooling connector, and on the other hand, it improves the connection strength and reliability.

[0072] In a specific application, fastener 411 comprises a wire screw and a bolt (not shown), which connects mounting portion 4, with the wire screw, to the battery pack housing. Mounting hole 41 is internally threaded, and the wire screw is threadedly engaged with the internal threads of mounting hole 41, thereby preventing wear of the internal threads in mounting hole 41 that could affect assembly and disassembly of the liquid-cooling joint. The bolt is threadedly engaged with the wire screw, which is then threadedly engaged with the battery pack housing, eliminating direct threading between the bolt and mounting hole 41 of mounting portion 4, thereby improving the reliability and strength of the connection.

[0073] refer to Figure 3 and Figure 4 In some embodiments of the present application, a plurality of mounting holes 411 are provided, and the plurality of mounting holes 411 are arranged at intervals.

[0074] In the embodiment of the present application, a plurality of mounting holes 411 are provided at intervals on the mounting portion 4 , thereby improving the reliability of the connection between the mounting portion 4 and the housing of the battery pack.

[0075] In a specific application, there are three mounting holes 411 , which are arranged in a "pin-shaped" pattern on the mounting portion 4 . This ensures connection reliability while avoiding excessive mounting holes 411 that would affect the efficiency of operators in disassembling and assembling the liquid cooling joint.

[0076] refer to Figure 1 and Figure 3 In some embodiments of the present application, a first joint 12 is provided at one end of the first connecting section 1 facing away from the second connecting section 2 , and the first joint 12 is used to connect to the vehicle body cooling system.

[0077] In the embodiment of the present application, the connection between the liquid cooling joint and the vehicle body cooling system is achieved by providing a first joint 12 at the end of the first connecting section 1 away from the second connecting section 2 .

[0078] In a specific application, the first connector 12 is a quick-connect connector, such as a VDA quick-connect connector, so that operators can connect the liquid cooling connector more efficiently and conveniently.

[0079] refer to Figure 1 and Figure 3 In some embodiments of the present application, a second connector 22 is provided at one end of the second connecting section 2 facing away from the first connecting section 1 , and the second connector 22 is used to connect to the liquid cooling plate of the battery pack.

[0080] In the embodiment of the present application, a second connector 22 is provided at one end of the second connecting section 2 facing away from the first connecting section 1 to achieve connection of the liquid cooling plate of the battery pack.

[0081] In a specific application, the second connector 22 is a quick-connect connector, such as a CQC quick-connect connector, so that operators can connect the liquid cooling connector more efficiently and conveniently.

[0082] In the above embodiment, the battery cooling in the vehicle body can be divided into two parts: the vehicle body cooling system and the battery pack liquid cooling plate. The vehicle body cooling system is mainly composed of a water tank and a water pump. The water tank is used to store the cooling medium. The water tank and the pipeline inside the battery pack liquid cooling plate form a circulation pipeline. The water pump is used to promote the cooling medium to flow in the circulation system.

[0083] In some embodiments of the present application, the present application also provides a battery pack, comprising a liquid cooling joint as described in any of the above embodiments.

[0084] In an embodiment of the present application, the battery pack includes the liquid-cooling joint described in any of the above embodiments, and the liquid-cooling joint includes a first connecting section 1, a second connecting section 2, and a third connecting section 3 that are interconnected. A first flow channel 11 and a second flow channel 21 whose axes are staggered with each other are provided in the first connecting section 1 and the second connecting section 2. A third flow channel 31 is provided in the third connecting section 3. The third flow channel 31 connects the first flow channel 11 and the second flow channel 21 and extends obliquely from one of the first flow channel 11 and the second flow channel 21 to the other; thereby, the cooling liquid flows in the first flow channel 11 and the second flow channel 21. When the coolant flows between the second flow channels 21, the inclined third flow channel 31 can regulate the flow rate of the coolant, thereby preventing the coolant from directly impacting the inside of the liquid cooling plate and preventing the liquid cooling plate from being damaged by long-term impact; at the same time, the number of the first flow channels 11, the second flow channels 21, and the third flow channels 31 is at least two, and each first flow channel 11, the second flow channel 21, and the third flow channel 31 forms an independent flow channel, and each third flow channel 31 is inclined and extended in a direction away from or close to each other, thereby rationally utilizing the space of the liquid cooling joint and being able to flexibly adapt to different usage scenarios.

[0085] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions 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 suitable manner in any one or more embodiments or examples.

[0086] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A liquid cooling joint for connecting a vehicle cooling system and a battery pack liquid cooling plate, characterized in that: include: A first connecting section (1), a second connecting section (2) and a third connecting section (3), wherein the first connecting section (1) is provided with a first flow channel (11), the second connecting section (2) is provided with a second flow channel (21), and the axis of the first flow channel (11) and the axis of the second flow channel (21) are staggered with each other; one end of the third connecting section (3) is connected to the first connecting section (1), and the other end is connected to the second connecting section (2); a third flow channel (31) is provided in the third connecting section (3), the third flow channel (31) is connected to the first flow channel (11) and the second flow channel (21), and the third flow channel (31) extends obliquely from one of the first flow channel (11) and the second flow channel (21) toward the other; The number of the first flow channel (11), the second flow channel (21) and the third flow channel (31) is at least two, and each of the first flow channel (11), the second flow channel (21) and the third flow channel (31) forms an independent flow channel, and the independent flow channels are arranged at intervals, and the third flow channels (31) are arranged to extend close to each other.

2. The liquid cooling joint according to claim 1, characterized in that The axis of the first flow channel (11) and the axis of the third flow channel (31) satisfy one of the following conditions: The axis of the first flow channel (11) and the axis of the third flow channel (31) form a first angle (α) and 30°≤α<90°; The axis of the second flow channel (21) and the axis of the third flow channel (31) form a second angle (β) and satisfy the following: 30°≤β<90°; The axis of the first flow channel (11) is parallel to the axis of the second flow channel (21).

3. The liquid cooling joint according to claim 1, characterized in that The liquid cooling joint further comprises a mounting portion (4), the mounting portion (4) being arranged at one end of the second connecting section (2) close to the third connecting section (3), and a mounting hole (41) being provided in the mounting portion (4) for connecting to a shell of a battery pack.

4. The liquid cooling joint according to claim 3, characterized in that A hollow structure (42) is provided in the mounting portion (4).

5. The liquid cooling joint according to claim 3, characterized in that It also includes a sealing member (44), and a sealing groove (43) is provided on the side of the mounting portion (4) facing away from the first connecting section (1), and the sealing groove (43) is used for mounting the sealing member (44).

6. The liquid cooling joint according to claim 3, characterized in that At least two of the first connecting section (1), the second connecting section (2), and the third connecting section (3) are integrally formed parts; Alternatively, the second connecting section (2) and the mounting portion (4) are an integrally formed part.

7. The liquid cooling joint according to claim 3, characterized in that A reinforcing rib (5) is provided between one end of the third connecting section (3) facing the mounting portion (4) and the mounting portion (4), and both ends of the reinforcing rib (5) respectively connect the third connecting section (3) and the mounting portion (4).

8. The liquid cooling joint according to claim 3, characterized in that The liquid cooling joint further comprises a fastener (411), wherein the fastener (411) is disposed in the mounting hole (41) and is used to connect the mounting portion (4) and the housing of the battery pack; And / or, a plurality of the mounting holes (41) are provided, and the plurality of mounting holes (41) are arranged at intervals.

9. The liquid cooling joint according to claim 1, characterized in that An end of the first connecting section (1) facing away from the second connecting section (2) is provided with a first connector (12), and the first connector (12) is used for connecting to the vehicle body cooling system; And / or, the second connecting section (2) is provided with a second connector (22) at one end facing away from the first connecting section (1), and the second connector (22) is used for connecting to the battery pack liquid cooling plate.

10. A battery pack, characterized in that: include: A liquid-cooled joint according to any one of claims 1 to 9.

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