Liquid cooling assembly and battery pack

Abstract

The utility model provides a liquid cooling assembly and a battery pack. The liquid cooling assembly comprises a plurality of liquid cooling plates arranged at intervals and a main pipe, a mounting space for mounting a heating body is formed between every two adjacent liquid cooling plates, and each liquid cooling plate comprises a flow channel part and a pipe nozzle communicated with the flow channel part; the main pipe comprises a plurality of connectors, the connectors are in one-to-one corresponding expanded connection with the pipe nozzles, the connectors are inserted into the pipe nozzles, supporting rings are arranged on the inner walls of the connectors and overlapped with the pipe nozzles, and the elastic modulus of the supporting rings is larger than that of the connectors. The supporting ring is arranged on the inner wall of the connector, the elastic modulus of the supporting ring is larger than that of the connector, the supporting ring is not prone to deformation relative to the connector, liquid leakage caused by the fact that the connector is crushed after insertion is prevented, and therefore the problems that the connection reliability of the connector and the liquid cooling plate is poor, liquid leakage is prone to occurring, and the reliability is poor are solved. And the cooling effect of the liquid cooling assembly is influenced.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a liquid cooling component and battery pack. Background Technology

[0002] In related technologies, liquid cooling components can be applied between heat-generating elements to reduce their temperature. These heat-generating elements can be batteries, etc. A liquid cooling component includes a liquid cooling plate and pipes connected to it. Due to the compact structure between adjacent liquid cooling plates, the connection between the pipes and the liquid cooling plates is relatively difficult. Liquid cooling components typically use corrugated pipe expansion joints to connect the pipes and the liquid cooling plates. However, because the pipes, corrugated pipes, and liquid cooling plates all have material tolerances, and assembly tolerances exist after assembly, the connection between the pipes and the liquid cooling plates is unreliable, prone to leakage, and affects the cooling effect of the liquid cooling component.

[0003] Therefore, it is urgent to solve the above-mentioned technical problems. Utility Model Content

[0004] The embodiments of this application provide a liquid cooling component and battery pack, which can improve the technical problem of poor connection reliability between pipes and liquid cooling plates, which easily leads to leakage and affects the cooling effect of the liquid cooling component.

[0005] In a first aspect, embodiments of this application provide a liquid cooling assembly, the liquid cooling assembly comprising:

[0006] Multiple spaced liquid cooling plates are arranged at intervals, and an installation space for mounting a heating element is formed between two adjacent liquid cooling plates. Each liquid cooling plate includes a flow channel and a nozzle communicating with the flow channel.

[0007] The main tube includes multiple connectors, each connector being expanded to correspond one-to-one with a plurality of nozzles. Each connector is inserted into a nozzle. The inner wall of each connector is provided with a support ring, which overlaps with the nozzle. The elastic modulus of the support ring is greater than that of the connector.

[0008] In some embodiments, the main tube includes a body portion and a connector connected to the body portion, wherein the elastic modulus of the connector is less than the elastic modulus of the body portion.

[0009] In some embodiments, the connector includes a connecting portion and a protrusion disposed adjacent to each other. The protrusion is disposed at the end of the connecting portion away from the body portion, and the support ring is correspondingly disposed on the inner wall of the protrusion. The outer diameter of the protrusion is larger than the outer diameter of the connecting portion.

[0010] In some embodiments, the inner diameter of the nozzle is a first dimension a, and the outer diameter of the protrusion is a second dimension b; wherein, 0.2 ≤ (ba) / a ≤ 0.9.

[0011] In some embodiments, the body portion is provided with support arms located on opposite sides of the connector, and a slot is provided on the surface of the support arms facing away from each other. The main tube also includes a buckle that engages with the slot, and the buckle is arranged around the connector. A boss is provided at the end of the nozzle away from the flow channel portion, and the buckle is provided on the side of the boss near the flow channel portion. A limiting structure is provided on the surface of the buckle near the axis of the connector, and the limiting structure is used to prevent the boss from moving away from the body portion along the insertion direction.

[0012] In some embodiments, the distance between the protrusion and the adjacent surfaces of the limiting structure ranges from 0.1 mm to 20 mm.

[0013] In some embodiments, the main tube includes multiple separately arranged sub-tubes connected in sequence; at least some of the sub-tubes have the connector.

[0014] In some embodiments, each of the sub-tubes is provided with a first connector at one end and a second connector at the other end; the first connector of one sub-tube is connected to the second connector of the adjacent sub-tube; the outer wall of the first connector is provided with a claw, and the outer wall of the second connector is provided with a flange, the claw engaging with the flange.

[0015] In some embodiments, the distance between the end of the second connector and the root of the claw in the connection direction between the second connector and the first connector is 1 mm to 20 mm.

[0016] Secondly, embodiments of this application provide a battery pack, the battery pack including the above-mentioned liquid cooling component, and the heating element being a battery.

[0017] The beneficial effects of the embodiments of this application are as follows:

[0018] In the embodiments of this application, by providing a support ring on the inner wall of the connector and making the elastic modulus of the support ring greater than that of the connector, the support ring is less prone to deformation relative to the connector, preventing the connector from being crushed after insertion and causing leakage. This improves the technical problem of poor connection reliability between the connector and the liquid cooling plate, which easily leads to leakage and affects the cooling effect of the liquid cooling assembly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of the liquid cooling assembly provided in an embodiment of this application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the liquid cooling plate in the middle;

[0022] Figure 3 yes Figure 1 A three-dimensional schematic diagram of a local structure;

[0023] Figure 4 yes Figure 3 Disassembly diagram of a local structure;

[0024] Figure 5 yes Figure 3 A top view of a local structure within the diagram;

[0025] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure at point AA;

[0026] Figure 7 yes Figure 1 A partial structural diagram of the supervisor in the text;

[0027] Figure 8 This is a schematic diagram of the battery pack structure provided in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] Liquid cooling component 1; heating element 2;

[0030] Liquid cooling plate 10, nozzle 11, boss 111, flow channel 12;

[0031] Main tube 20, connector 21, connecting part 211, protrusion 212, support ring 22, body part 23, support arm 231, slot 231a, buckle 232, limiting structure 2321, sub-tube 25, first connector 251, claw 2511, sealing ring 2512, second connector 252, flange 2521;

[0032] The distance L1 between the surfaces of the boss 111 and the buckle 232 that are close to each other, and the distance L2 between the end of the second connector 252 and the root of the claw 2511 in the connection direction between the second connector 252 and the first connector 251.

[0033] Battery pack 3. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0035] Firstly, such as Figures 1 to 7 As shown, an embodiment of this application provides a liquid cooling assembly 1, which includes a plurality of spaced liquid cooling plates 10 and a main pipe 20. An installation space for mounting a heating element 2 is formed between two adjacent liquid cooling plates 10. Each liquid cooling plate 10 includes a flow channel 12 and a nozzle 11 communicating with the flow channel 12. The main pipe 20 includes a plurality of connectors 21, which are expanded to correspond one-to-one with the plurality of nozzles 11. The connectors 21 are inserted into the nozzles 11. A support ring 22 is provided on the inner wall of the connector 21. The support ring 22 overlaps with the nozzle 11. The elastic modulus of the support ring 22 is greater than that of the connector 21.

[0036] The shape of the liquid cooling plate 10 can be adaptively adjusted according to the shape of the heating element 2. For example... Figure 1 and Figure 2 As shown, when the heating element 2 is a cylindrical battery, the liquid cooling plate 10 can be a serpentine plate. The serpentine plate includes multiple connected arc surfaces. One arc surface can match the outer surface of a cylindrical battery, thereby increasing the contact area between the serpentine plate and the cylindrical battery and improving the cooling effect.

[0037] When the heating element 2 is a square electrode, the liquid cooling plate 10 can be a flat plate with a planar surface, thus matching the surface of the square electrode and increasing the contact area between the plate and the square battery. When the heating element 2 has other shapes, the shape of the liquid cooling plate 10 can also match the outer surface of the heating element 2. This application does not limit the shape of the liquid cooling plate 10.

[0038] The flow channel 12 has a flow channel inside, and the coolant can flow along the flow channel to carry away the heat generated by the heating element 2, thereby achieving temperature uniformity and cooling effect.

[0039] like Figure 1 and Figure 2As shown, one end of the flow channel 12 may be provided with two nozzles 11, one nozzle 11 for liquid inlet and the other nozzle 11 for liquid outlet. The nozzle 11 is a hollow tubular structure. The coolant can flow into the flow channel in the flow channel 12 through the pipe inside one nozzle 11, and after circulating in the flow channel, it flows out along the other nozzle 11. Figure 2 The dashed arrows in the diagram indicate the flow path of the coolant, and the flow path between the two nozzles 11 is U-shaped. This design reduces the flow resistance in the liquid cooling assembly 1, saving space. Simultaneously, a single liquid cooling plate 10 can achieve temperature neutralization, reducing the temperature difference between the corresponding heat-generating elements 2 along the length of the same liquid cooling plate 10.

[0040] Optionally, in other embodiments, a nozzle 11 is provided at each end of the flow channel 12. Coolant flows into the flow channel of the flow channel 12 through one nozzle 11 and flows out through the other nozzle 11. The flow path of the coolant is a unidirectional line from one end of the flow channel 12 to the other end.

[0041] like Figure 1 and Figure 3 As shown, the main pipe 20 includes at least one connector 21, which is expanded to correspond one-to-one with the nozzle 11. The number of connectors 21 is equal to the number of nozzles 11. The connector 21 is a hollow tubular structure, through which coolant flows via the pipes inside the connector 21, the pipes inside the nozzle 11, and the flow channel of the flow passage 12. The main pipe 20 can be at least one of an inlet pipe or a return pipe.

[0042] The connector 21 and the nozzle 11 are expanded together. Expansion refers to applying radial pressure to the connector 21 and nozzle 11 through plastic deformation, thereby achieving sufficient connection strength and sealing reliability. For example, the connector 21 can be made of a flexible material, which is flexible and can undergo plastic deformation under stress. The connector 21 and nozzle 11 can be interference-fitted, causing the flexible material to be compressed, thereby achieving sufficient connection strength and sealing reliability.

[0043] Optionally, in some embodiments, the material of the connector 21 can be a flexible material such as ethylene propylene rubber (EPDM), thermoplastic elastomer (TPE), or thermoplastic polyurethane (TPU).

[0044] The connector 21 is inserted into the nozzle 11, meaning that at the insertion point, the connector 21 is located inside the nozzle 11. The support ring 22 overlaps with the nozzle 11, meaning that the nozzle 11 is fitted around the support ring 22. Because the elastic modulus of the support ring 22 is greater than that of the connector 21, when the connector 21 is inserted into the nozzle 11, the support ring 22 is less prone to deformation than the connector 21, meaning the connector 21 is less likely to be crushed. This prevents leakage at the connection between the connector 21 and the nozzle 11, thus avoiding affecting the cooling effect of the liquid cooling assembly 1. The elastic modulus is the ratio of stress to strain. The larger the elastic modulus, the less easily the material deforms; the smaller the elastic modulus, the more easily the material deforms.

[0045] The support ring 22 can be made of a metal or other non-deformable material. The support ring 22 can be made of copper, iron, steel, etc., but is not limited to these materials.

[0046] In some embodiments, such as Figure 4 As shown, the main tube 20 includes a body part 23 and a connector 21 connected to the body part 23. The elastic modulus of the connector 21 is less than that of the body part 23.

[0047] The materials of the body 23 and the connector 21 can be different. The elastic modulus of the connector 21 is less than that of the body 23, which means that the connector 21 is more easily deformed than the body 23, thus allowing it to be expanded and connected to the nozzle 11. On the other hand, the body 23 is less easily deformed than the connector 21, meaning that the body 23 has higher mechanical strength and is more robust and durable.

[0048] Optionally, the body part 23 can be made of polyhexamethylene adipamide (PA66), polyphenylene sulfide (PPS), modified polyphenylene ether (PPE), polypropylene terephthalate (PPA), etc.

[0049] In some embodiments, such as Figure 6 and Figure 7 As shown, the connector 21 includes a connecting portion 211 and a protrusion 212 arranged adjacent to each other. The protrusion 212 is disposed at the end of the connecting portion 211 away from the main body portion 23. The support ring 22 is correspondingly disposed on the inner wall of the protrusion 212. The outer diameter of the protrusion 212 is larger than the outer diameter of the connecting portion 211.

[0050] like Figure 6 As shown, the connecting portion 211 and the protrusion 212 can be made of the same material. The protrusion 212 is located near the opening end of the connector 21, and the connecting portion 211 connects the protrusion 212 to the body portion 23. The support ring 22 is nested in the inner wall of the protrusion 212, and the width of the support ring 22 can be less than or equal to the width of the protrusion 212, where the width refers to the dimension in the direction of the axis of the connector 21.

[0051] Optionally, such as Figure 6As shown, the surface of the support ring 22 near the opening of the connector 21 is flush with the surface of the protrusion 212 near the opening of the connector 21, thereby enhancing the mechanical strength of the protrusion 212 and preventing the connector 21 from being crushed during the insertion process.

[0052] In some embodiments, such as Figure 6 As shown, the inner diameter of the nozzle 11 is the first dimension a, and the outer diameter of the protrusion 212 is the second dimension b; where 0.2≤(ba) / a≤0.9.

[0053] To ensure a tight fit between the nozzle 11 and the protrusion 212, the nozzle 11 and the protrusion 212 are designed with an interference fit. An interference fit means that the inner diameter of the nozzle 11 is smaller than the outer diameter of the protrusion 212, so that after insertion, the nozzle 11 and the protrusion 212 are tightly connected to prevent leakage.

[0054] Optionally, in order to ensure the assembly tolerance between the convex part 212 and the nozzle 11, the outer diameter of the convex part 212 and the inner diameter of the nozzle 11 shall satisfy the relationship 0.2≤(ba) / a≤0.9.

[0055] It should be noted that the inner diameter of the nozzle 11 can be a uniform size, meaning that the inner diameter of the nozzle 11 is the same at any point in the insertion direction. The outer diameter of the protrusion 212 can be a non-uniform size, meaning that the outer diameter of the protrusion 212 is different at at least two points in the insertion direction. For example, in the insertion direction between the nozzle 11 and the connector 21, the outer diameter of the end of the protrusion 212 away from the body portion 23 is smaller than the outer diameter of the end of the protrusion 212 closer to the body portion 23. By the above arrangement, the size of the end of the protrusion 212 away from the body portion 23 can be reduced, thereby making it easier for the protrusion 212 to be inserted into the nozzle 11.

[0056] In some embodiments, such as Figures 4 to 6 As shown, the main body 23 is provided with support arms 231 located on opposite sides of the connector 21. The surface of the support arms 231 facing away from each other is provided with a slot 231a. The main tube 20 also includes a buckle 232 that engages with the slot 231a. The buckle 232 is arranged around the connector 21. The nozzle 11 is provided with a boss 111 at the end away from the flow channel 12. The buckle 232 is provided on the side of the boss 111 near the flow channel 12. The surface of the buckle 232 near the axis of the connector 21 is provided with a limiting structure 2321. The limiting structure 2321 is used to prevent the boss 111 from moving away from the main body 23 in the insertion direction.

[0057] like Figure 4 As shown, the support arm 231 is disposed on the outer wall of the body portion 23 and extends in a direction away from the body portion 23. One support arm 231 is disposed on each of the opposite sides of the connector 21. The support arms 231 are spaced apart from the connector 21 to avoid interference between the support arms 231 and the nozzle 11, thus preventing interference with the insertion of the connector 21 and the nozzle 11.

[0058] like Figure 5 As shown, two support arms 231 located on opposite sides of the same connector 21 are arranged along the axial direction of the body 23. When the main pipe 20 is molded using injection molding, the support arms 231 arranged along the axial direction of the body 23 will not affect the demolding of the mold.

[0059] like Figures 4 to 6 As shown, a slot 231a is provided on one of the opposing surfaces of the support arms 231, which can engage with the buckle 232. The width of the slot 231a can match the width of the carabiner, and the slot 231a can prevent the buckle 232 from moving along the insertion direction of the connector 21 and the nozzle 11. The buckle 232 has a ring structure and surrounds the periphery of the connector 21. It should be noted that the slot 231a can prevent the buckle 232 from rotating around the axis of the connector 21.

[0060] like Figure 4 and Figure 6 As shown, the buckle 232 has a corresponding limiting structure 2321 on one side surface near the axis of the connector 21. The limiting structure 2321 cooperates with the boss 111 to prevent the nozzle 11 from disengaging from the connector 21.

[0061] It should be understood that, in order to facilitate the insertion of the nozzle 11 into the connector 21, the limiting structure 2321 does not obstruct the movement of the nozzle 11 along the direction from the connector 21 towards the body portion 23. Specifically, the limiting structure 2321 has an inclined surface, and the distance between two opposing limiting structures 2321 increases along the direction away from the body portion 23. During insertion, the boss 111 can slide along the inclined surface of the limiting structure 2321; after insertion, the boss 111 is located on the side of the limiting structure 2321 away from the flow channel portion 12. When the nozzle 11 disengages from the connector 21 along the insertion direction, the limiting structure 2321 will interfere with the boss 111, thereby preventing the connector 21 from disengaging from the nozzle 11.

[0062] like Figure 6 As shown, the boss 111 and the limiting structure 2321 can not only prevent the connector 21 from detaching from the nozzle 11, but also prevent the nozzle 11 from being improperly inserted through the cooperation of the boss 111 and the limiting structure 2321.

[0063] Optionally, to ensure assembly reliability, the distance L1 between the surfaces of the boss 111 and the limiting structure 2321 that are close to each other ranges from 0.1 mm to 20 mm. The surfaces of the boss 111 and the limiting structure 2321 that are close to each other refer to the side surface of the boss 111 that is close to the limiting structure 2321 and the side surface of the limiting structure 2321 that is close to the boss 111.

[0064] In some embodiments, such as Figure 1 and Figure 7 As shown, the main pipe 20 includes multiple separately arranged sub-pipes 25, which are connected in sequence; at least some of the sub-pipes 25 have connectors 21.

[0065] To reduce the variety of materials in the main pipe 20, the main pipe 20 can be formed by multiple sub-pipes 25 with identical structures. This reduces the variety of sub-pipes 25, facilitates material standardization, and lowers production management costs. For example, each sub-pipe 25 can include the same number of connectors 21. For example, each sub-pipe 25 can have two spaced connectors 21, in which case the sub-pipe 25 is a four-way connector 21. The sub-pipe 25 can also have other numbers of connectors 21, such as three, four, five, or six connectors 21, etc., and this application does not impose any limitations on this.

[0066] When a sub-tube 25 has two connectors 21, the structure of the sub-tube 25 is easier to process, which can reduce the manufacturing cost of the sub-tube 25. Moreover, when the sub-tube 25 has fewer connectors 21, it is easier to absorb the positional deviation between multiple liquid cooling plates 10 connected to the same sub-tube 25, reducing the assembly difficulty.

[0067] Specifically, multiple liquid cooling plates 10 can be stacked with the heating element 2, and then multiple sub-tubes 25 can be aligned with the liquid cooling plates 10 using a tooling, and then the multiple sub-tubes 25 can be synchronously inserted with the multiple liquid cooling plates 10.

[0068] In some embodiments, such as Figure 7 As shown, each sub-tube 25 is provided with a first connector 251 at one end and a second connector 252 at the other end; the first connector 251 of one sub-tube 25 is connected to the second connector 252 of the adjacent sub-tube 25; the outer wall of the first connector 251 is provided with a claw 2511, and the outer wall of the second connector 252 is provided with a flange 2521, and the claw 2511 engages with the flange 2521.

[0069] like Figure 7 As shown, the first connector 251 and the second connector 252 have different structures. The first connector 251 of one sub-tube 25 can be inserted into the second connector 252 of an adjacent sub-tube 25. After insertion, the first connector 251 is located inside the second connector 252, that is, the outer sidewall of the first connector 251 is in contact with the inner sidewall of the second connector 252. The first connector 251 and the second connector 252 have an interference fit, thereby ensuring connection strength and sealing reliability.

[0070] In one embodiment, such as Figure 7As shown, a groove is provided on the outer wall of the first connector 251. The groove is coaxial with the first connector 251, that is, the groove is annular. The depth of the groove is less than the thickness of the outer wall of the first connector 251. A sealing ring 2512 is provided inside the groove. The material of the sealing ring 2512 can be an elastic material, such as rubber. The sealing ring 2512 is fitted over the first connector 251.

[0071] The inner wall of the second connector 252 contacts the sealing ring 2512. This means that the sealing ring 2512 is positioned between the side walls of the first connector 251 and the second connector 252. After the first connector 251 and the second connector 252 are inserted, the sealing ring 2512 is under compression. The sealing ring 2512 can absorb the tolerance between the first connector 251 and the second connector 252, ensuring connection strength and sealing reliability.

[0072] In one embodiment, such as Figure 7 As shown, the outer wall of the first connector 251 is provided with a claw 2511, and the outer wall of the second connector 252 is provided with a flange 2521. The claw 2511 engages with the flange 2521. Two adjacent sub-tubes 25 are quickly connected to the flange 2521 via the claw 2511. After the claw 2511 engages with the flange 2521, it can prevent the second connector 252 and the first connector 251 from falling off along the connection direction.

[0073] At the same time, the relative positional relationship between the claw 2511 and the flange 2521 can be seen visually, which makes it easy to determine whether the first connector 251 and the second connector 252 are properly connected.

[0074] In some embodiments, such as Figure 7 As shown, the distance L2 between the end of the second connector 252 and the root of the claw 2511 in the connection direction between the second connector 252 and the first connector 251 is 1 mm to 20 mm.

[0075] The connection direction between the second connector 252 and the first connector 251 refers to the axial direction of the second connector 252. Since the distance L1 between the first connector 251 and the second connector 252 in the connection direction is 1 mm to 20 mm, the distance L1 between the centers of two adjacent sub-tubes 25 can be adjusted within this range, so that the connector 21 can be better aligned with the nozzle 11, absorbing assembly tolerances, reducing assembly difficulty, and improving assembly efficiency.

[0076] It should be understood that when the distance L2 between the end of the second connector 252 and the root of the claw 2511 in the connection direction between the second connector 252 and the first connector 251 is 1 mm to 20 mm, the claw 2511 and the flange 2521 are in an engaged state, and the distance L1 between the claw 2511 and the flange 2521 is greater than or equal to 0 mm.

[0077] Secondly, such as Figure 8 As shown, an embodiment of this application provides a battery pack, which includes the liquid cooling component 1 described above, and the heating element 2 is a battery.

[0078] In this embodiment, please refer to Figure 1 The heating element 2 can be a battery, such as a round battery or a square battery. The battery is installed in the mounting space between two adjacent liquid cooling plates 10, which can cool the battery.

[0079] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A liquid cooling assembly (1), characterized in that, The utility model relates to a liquid cooling plate and main pipe connection structure, including: A plurality of interval liquid cooling plate (10) are arranged, two adjacent liquid cooling plate (10) form the mounting space for installing heat generating body (2) between every liquid cooling plate (10) includes flow passage part (12) and the nozzle (11) of communication with flow passage part (12); Main pipe (20), main pipe (20) includes a plurality of joint (21), a plurality of nozzle (11) with a plurality of joint (21) one-to-one expansion joint, the joint (21) is inserted in nozzle (11), the inner wall of joint (21) is provided with support ring (22), support ring (22) overlaps with nozzle (11), the elastic modulus of support ring (22) is greater than the elastic modulus of joint (21).

2. The liquid cooling assembly (1) according to claim 1, characterized in that The main pipe (20) includes a body portion (23) and the joint (21) connected to the body portion (23), and the elastic modulus of the joint (21) is less than the elastic modulus of the body portion (23).

3. The liquid cooling assembly (1) according to claim 2, characterized in that The joint (21) includes an adjacent connection portion (211) and a protrusion (212), the protrusion (212) is provided at one end of the connection portion (211) away from the body portion (23), the support ring (22) is correspondingly provided on the inner wall of the protrusion (212), and the outer diameter of the protrusion (212) is greater than the outer diameter of the connection portion (211).

4. The liquid cooling assembly (1) according to claim 3, characterized in that The inner diameter of the nozzle (11) is a first size a, and the outer diameter of the protrusion (212) is a second size b. Wherein, 0.2≤(b-a) / a≤0.

9.

5. The liquid cooling assembly (1) according to any one of claims 2 to 4, characterized in that, The body portion (23) is provided with support arms (231) located on opposite sides of the joint (21), one side surface of the support arms (231) facing away from each other is provided with a clamping groove (231a), the main pipe (20) further includes a buckle (232) clamped with the clamping groove (231a), and the buckle (232) is arranged around the joint (21); one end of the nozzle (11) away from the flow passage part (12) is provided with a boss (111), the buckle (232) is arranged on one side of the boss (111) close to the flow passage part (12), one side surface of the buckle (232) close to the axis of the joint (21) is provided with a limiting structure (2321), and the limiting structure (2321) is used to prevent the boss (111) from moving away from the body portion (23) along the insertion direction.

6. The liquid cooling assembly (1) according to claim 5, characterized in that The distance (L1) between the surfaces of the boss (111) and the limiting structure (2321) close to each other ranges from 0.1 mm to 20 mm.

7. The liquid cooling assembly (1) according to any one of claims 1 to 4, characterized in that The main pipe (20) includes a plurality of sub-pipes (25) arranged in sections, and the plurality of sub-pipes (25) are connected in sequence. At least part of the sub-pipes (25) have the joint (21).

8. The liquid cooling assembly (1) according to claim 7, characterized in that One end of each of the sub-pipes (25) is provided with a first joint (251), and the other end is provided with a second joint (252); the first joint (251) of one sub-pipe (25) is connected with the second joint (252) of an adjacent sub-pipe (25); the outer wall of the first joint (251) is provided with a clamping jaw (2511), and the outer wall of the second joint (252) is provided with a flange (2521), and the clamping jaw (2511) is clamped with the flange (2521).

9. The liquid cooling assembly (1) according to claim 8, characterized in that The spacing (L2) between the end of the second joint (252) and the root of the clamping jaw (2511) in the connection direction of the second joint (252) and the first joint (251) is 1-20 mm.

10. A battery pack, characterized by, The liquid cooling assembly (1) according to any one of claims 1-9, wherein the heat generating body (2) is a battery.

Images