CN221126050U - Thermal management system and battery pack - Google Patents

Abstract

The utility model discloses a thermal management system and a battery pack, belonging to the field of battery technology. The thermal management system includes a connecting pipe and a plurality of liquid cooling plates, the plurality of liquid cooling plates are arranged at intervals along a first direction, the liquid cooling plates are provided with a pipe joint, the connecting pipe is arranged between two adjacent liquid cooling plates, and the two axial ends of the connecting pipe are respectively inserted into the pipe joints of the two adjacent liquid cooling plates to connect the two adjacent liquid cooling plates, and the rigidity of the pipe joint is greater than the rigidity of the connecting pipe. The utility model can realize the assembly of the connecting pipe and the pipe joint, improve the reliability and stability of the assembly between the connecting pipe and the pipe joint, and further improve the reliability of the connection between adjacent liquid cooling plates, and avoid leakage between adjacent liquid cooling plates.

Description

Thermal management system and battery pack

Technical Field

The utility model belongs to the technical field of battery packs, and in particular relates to a thermal management system and a battery pack.

Background technique

At present, battery packs are cooled by liquid cooling plates, and adjacent liquid cooling plates need to be connected, generally by connecting pipes and pipe joints.

The existing solution is to insert the pipe joint into the inside of the connecting pipe, and the connecting pipe is sleeved on the outside of the pipe joint to achieve the cooperation between the two. However, when the temperature of the cooling medium in the liquid cooling system rises or other conditions cause the pressure in the pipe to increase, the pressure in the pipe acts on the connecting pipe, which can easily cause the external connecting pipe to expand and deform, thereby causing leakage on the contact surface between the connecting pipe and the pipe joint, affecting the safety of the battery pack.

Summary of the invention

The utility model aims to provide a thermal management system and a battery pack, which at least solve the problem of reliability of connection between a connecting pipe and a pipe joint in the prior art.

In order to solve the above technical problems, the utility model is achieved as follows:

In the first aspect, an embodiment of the utility model proposes a thermal management system, comprising: a connecting pipe and a plurality of liquid cooling plates, the plurality of liquid cooling plates being arranged at intervals along a first direction X, the liquid cooling plates being provided with pipe joints, the connecting pipe being arranged between two adjacent liquid cooling plates, and the axial ends of the connecting pipe being respectively inserted into the pipe joints of two adjacent liquid cooling plates to connect the two adjacent liquid cooling plates, and the stiffness of the pipe joint being greater than the stiffness of the connecting pipe.

Optionally, a first protrusion is provided on the outer wall of the connecting tube, and the first protrusion extends away from the connecting tube in the radial direction of the connecting tube, wherein the connecting tube is inserted into the interior of the pipe joint, and the first protrusion cooperates with the pipe joint in the axial direction of the connecting tube to limit the relative movement of the pipe joint and the connecting tube.

Optionally, the connecting pipe includes a first pipe segment and a second pipe segment, the first pipe segment is connected to the second pipe segment at both axial ends, the maximum wall thickness of the second pipe segment is greater than the maximum wall thickness of the first pipe segment, and the second pipe segment is at least partially inserted into the pipe joint.

Optionally, the inner diameters of the first pipe section and the second pipe section are equal.

Optionally, the connecting pipe comprises a first fastener and a sleeve, the first fastener is connected to the outer wall of the sleeve, and the pipe joint has a second fastener; wherein,

The sleeve has a channel for circulating the medium;

The sleeve is inserted into the pipe joint and the pipe joint is connected to the channel. The first fastening member and the second fastening member are fastened together to limit the movement of the connecting pipe and the pipe joint along the axial direction of the connecting pipe.

Optionally, the connecting pipe further includes an inner liner pipe, the sleeve is sleeved on at least one axial end of the inner liner pipe, and the inner liner pipe is connected to the pipe joint.

Optionally, the rigidity of at least part of the liner pipe is smaller than the rigidity of the casing pipe, and the liner pipe can be deformed along its axial direction and/or radial direction.

Optionally, the outer wall of the inner liner tube at least partially extends away from the inner liner tube in the radial direction of the inner liner tube to form a stepped portion;

The sleeve is assembled and connected with the stepped portion, and the sleeve abuts against the stepped portion along the axial direction of the liner pipe.

Optionally, the liner pipe and the sleeve are integrally formed.

Optionally, the first fastening member is provided with a limited space, and the second fastening member includes fastening teeth; or, the first fastening member includes fastening teeth, and the second fastening member is provided with a limited space;

The locking teeth are at least partially accommodated in the limiting space and the two are matched in the axial limit position of the connecting pipe.

Optionally, the first buckling member includes a first limiting portion, a second limiting portion and a buckling portion;

The first limiting portion and the sleeve are spaced apart along the radial direction of the sleeve, one end of the first limiting portion is fixed to the sleeve through the second limiting portion, and the other end of the first limiting portion is connected to the buckling portion;

The buckle part and the second limiting part are opposite to each other along the axial direction of the connecting pipe, and are spaced apart from the sleeve along the radial direction of the sleeve. The buckle part, the first limiting part, the second limiting part and the sleeve together form the limiting space.

The second fastening member is fastened in the limiting space.

Optionally, the buckling portion includes a connecting end and a guiding end opposite to each other;

The connecting end is connected to the first limiting portion;

There is a gap between the guide end and the sleeve;

A guide surface is provided on a side of the guide end away from the second limiting portion, and an end of the guide surface away from the connecting end is inclined toward the second limiting portion.

Optionally, the connecting pipe further comprises a sealing ring;

The sealing ring abuts between the connecting pipe and the pipe joint.

Optionally, a limiting groove is provided on the outer wall of the connecting pipe;

At least a portion of the sealing ring is embedded in the limiting groove.

Optionally, a limiting protrusion is further provided on the inner wall of the sleeve;

Along the axial direction of the inner liner tube, the limiting protrusion abuts against the end surface of the inner liner tube.

Optionally, the first fastening member is provided with a first reinforcing protrusion; and/or the second fastening member is provided with a second reinforcing protrusion.

In a second aspect, an embodiment of the utility model provides a battery pack, comprising the above-mentioned thermal management system.

In the embodiment of the utility model, the connecting tube is inserted into the inside of the tube joint, that is, the tube joint with greater rigidity is sleeved on the outside of the connecting tube, thereby suppressing the expansion and deformation of the connecting tube, improving the connection reliability between the connecting tube and the tube joint, and improving the safety of the battery pack.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

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:

FIG1 is a schematic diagram of the structure of a connecting pipe and a pipe joint in an embodiment of the present utility model;

FIG2 is a schematic structural diagram of a connecting pipe in an embodiment of the present utility model;

FIG3 is a schematic cross-sectional view of a connecting pipe in an embodiment of the present utility model;

FIG4 is a schematic structural diagram of another connecting pipe in an embodiment of the utility model;

FIG5 is a schematic cross-sectional view of another connecting pipe in an embodiment of the present utility model;

FIG6 is a schematic cross-sectional view of another connecting pipe in an embodiment of the present utility model;

FIG7 is a schematic diagram of the structure of a thermal management component in an embodiment of the present utility model;

FIG8 is a schematic diagram of a disassembled structure of a thermal management component in an embodiment of the present utility model;

FIG. 9 is a schematic structural diagram of a pipe joint in an embodiment of the present utility model.

Reference numerals:

1-inner liner, 11-sleeve portion, 12-connecting portion, 13-first flow channel, 14-step portion, 21-first fastening member, 211-first limiting portion, 212-second limiting portion, 213-fastening member, 2131-guide surface, 2132-connecting end, 2133-guide end, 214-limiting space, 215-first reinforcing protrusion, 22-sleeve, 221-limiting groove, 23-limiting protrusion, 3-sealing ring, 100-connecting pipe, 101-first pipe section, 102-second pipe section, 103-first protrusion, 200-pipe joint, 201-second fastening member, 202-guide slope, 203-joint pipe body, 300-liquid cooling plate.

Detailed ways

The embodiments of the present invention will be 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 should not be construed as limiting the present invention. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

The features of the terms "first" and "second" in the specification and claims of the utility model may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are in an "or" relationship.

In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "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 invention 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 cannot be understood as a limitation on the present invention.

The term "parallel" in this application includes not only the absolute parallel situation, but also the roughly parallel situation 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, "vertical" also includes not only the absolute vertical situation, but also the roughly vertical situation conventionally recognized in engineering, such as "vertical" 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 absolute equal situation, but also the roughly equal situation conventionally recognized in engineering, that is, there may be a certain error, such as the state where the tolerance range is -1% to 1%.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The thermal management system and the battery pack described in the embodiment of the utility model are described below in conjunction with FIGS. 1 to 9 .

As shown in Figures 1 and 2, the thermal management system in the embodiment of the utility model may specifically include a connecting pipe 100 and a plurality of liquid cooling plates 300, the plurality of liquid cooling plates 300 are arranged at intervals along the first direction X, the liquid cooling plates 300 are provided with pipe joints 200, the connecting pipe 100 is arranged between two adjacent liquid cooling plates 300, and the axial ends of the connecting pipe 100 are respectively inserted into the inside of the pipe joints 200 of the two adjacent liquid cooling plates 300 to connect the two adjacent liquid cooling plates 300, and the stiffness of the pipe joint 200 is greater than the stiffness of the connecting pipe 100.

In the embodiment of the utility model, the connecting pipe 100 is inserted into the pipe joint 200, and the stiffness of the pipe joint 200 is greater than that of the connecting pipe 100. When the cooling medium flows between the pipe joint 200 and the connecting pipe 100, if the temperature rises or other conditions cause the pressure of the cooling medium on the connecting pipe 100 and the pipe joint 200 to increase, the connecting pipe 100 inserted in the pipe joint 200 will undergo a larger expansion deformation than the pipe joint 200, thereby squeezing the pipe joint 200, so that the contact surface between the two is more tightly connected, thereby improving the connection reliability of the connecting pipe 100 and the pipe joint 200, and avoiding leakage of the thermal management system.

It should be understood that in this embodiment, the rigidity of the pipe joint 200 is greater than the rigidity of the connecting pipe 100. The rigidity of any part of the pipe joint 200 is greater than the rigidity of any part of the connecting pipe 100. It can also be that the rigidity of the part where the pipe joint 200 and the connecting pipe 100 are plugged together is greater than the rigidity of the plugged part of the connecting pipe 100. The pipe joint 200 can be made of a material with greater rigidity, such as steel or aluminum, and the connecting pipe 100 can be made of a material with less rigidity, such as plastic. Alternatively, the pipe joint 200 and the connecting pipe 100 are made of the same material, but the wall thickness of the pipe joint 200 is greater than the wall thickness of the connecting pipe 100, which can also achieve the difference in rigidity between the two, thereby achieving a more tightly fitting effect between the two after being compressed.

Specifically, the first direction is the direction in which the plurality of liquid cooling plates 300 are spaced apart, and the first direction is consistent with the axial direction of the connecting pipe 100 and the axial direction of the pipe joint 200 . As shown in FIG. 1 , the first direction is the X direction indicated by the arrow.

In an embodiment of the utility model, as shown in Figure 4, the outer wall of the connecting tube 100 is provided with a first protrusion 103, and the first protrusion 103 extends away from the connecting tube 100 along the radial direction of the connecting tube 100, wherein the connecting tube 100 is inserted into the interior of the pipe joint 200, and the first protrusion 103 and the pipe joint 200 are stopped in the axial direction of the connecting tube 100 to limit the relative movement of the pipe joint 200 and the connecting tube 100. It can be understood that the first protrusion 103 is spaced from the end of the connecting tube 100 in the axial direction of the connecting tube 100, and after the connecting tube 100 is inserted into the pipe joint 200 for a certain distance, the first protrusion 103 and the pipe joint 200 will have a blocking effect in the axial direction of the connecting tube 100, thereby limiting the connecting tube 100 and the pipe joint 200 from continuing to move toward each other. Specifically, at least two first protrusions 103 may be provided, and at least two first protrusions 103 are arranged at intervals along the axial direction of the connecting pipe 100. The pipe joints 200 at both ends of the connecting pipe 100 are respectively matched with a first protrusion 103 stopper, and the pipe joints and the first protrusions 103 may be arranged one-to-one. In this way, the first protrusions 103 on the connecting pipe 100 are subjected to two opposite forces in the axial direction, so that the matching between the connecting pipe 100 and the pipe joint 200 is more reliable, and the connection pipe 100 and the pipe joint 200 are prevented from falling off, thereby improving the safety of the thermal management system.

In the embodiment of the utility model, the first protrusion 103 can be integrally formed with the connecting tube 100, thereby reducing the manufacturing cost and improving the connection reliability between the first protrusion 103 and the connecting tube 100. In other embodiments, the first protrusion 103 and the connecting tube 100 can be connected by welding or fusion or other methods, which are not limited here.

In the embodiment of the utility model, as shown in FIG. 4 , the connecting pipe 100 includes a first pipe section 101 and a second pipe section 102, and the two axial ends of the first pipe section 101 are connected to the second pipe section 102, the maximum wall thickness of the second pipe section 102 is greater than the maximum wall thickness of the first pipe section 101, and the second pipe section 102 is at least partially inserted into the pipe joint 200. It can be understood that the connecting pipe 100 is an I-shaped structure, with large ends and small middle, so that the two ends of the connecting pipe 100 with larger wall thickness are used for inserting with the pipe joint 200, so that the rigidity of the ends of the connecting pipe 100 is greater than that of the middle part, and the middle part is more likely to deform, thereby absorbing the assembly tolerance, and the rigidity of the ends is relatively large (but less than the rigidity of the pipe joint 200), which can ensure that it can withstand greater pressure during the assembly process, avoid large deformation and inability to install, and affect the assembly yield.

In the embodiment of the utility model, the inner diameters of the first pipe section 101 and the second pipe section 102 are equal, that is, the second pipe section 102 protrudes radially outward from the outer wall of the first pipe section 101 to form a difference in wall thickness. The equal inner diameters allow the internal fluid medium to flow smoothly, thereby ensuring the consistency of the flow resistance in the connecting pipe 100.

In an embodiment of the utility model, the connecting tube 100 includes a first fastening member 21 and a sleeve 22, the first fastening member 21 is connected to the outer wall of the sleeve 22, the pipe joint 200 has a second fastening member 201, and the sleeve 22 has a channel for circulating the medium; the sleeve 22 is inserted into the pipe joint 200 and the pipe joint is connected to the channel, the first fastening member 21 and the second fastening member 201 are fastened and connected to limit the axial movement of the connecting tube 100 and the pipe joint 200 along the connecting tube 100, which can improve the reliability and stability of the assembly between the connecting tube 100 and the pipe joint 200, and further improve the reliability of the connection between adjacent liquid cooling plates 300, and avoid leakage between adjacent liquid cooling plates 300.

Specifically, by fastening the first fastening member 21 and the second fastening member 201, the connection between the connecting pipe 100 and the pipe joint 200 is realized, and then the assembly between the connecting pipe 100 and the liquid cooling plate 300 is realized, which can realize rapid installation and improve installation efficiency. In addition, the first fastening member 21 and the second fastening member 201 can generate a limit in the axial direction of the connecting pipe 100, which can absorb the installation tolerance of the connecting pipe 100 and the liquid cooling plate 300 in the axial direction of the connecting pipe 100.

Specifically, the connecting tube 100 has a first fastener 21 . Since the pipe joint 200 can be plugged into the connecting tube 100 and communicate with the channel 13 of the sleeve 22 , the connecting tube 100 can be connected to the pipe joint 200 and can also transmit the fluid medium in the liquid cooling plate 300 .

Specifically, the pipe joint 200 may have a second flow passage for the flow of the medium, and the second flow passage may be communicated with the channel 13 .

For example, the adjacent first and second liquid cooling plates are used as examples to illustrate: the fluid medium can flow from the second flow channel on the pipe joint 200 of the first liquid cooling plate into the channel 13, and then flow into the second flow channel on the pipe joint 200 of the second liquid cooling plate.

Optionally, the first fastening member 21 is connected to the outer wall of the sleeve 22; the first fastening member 21 is provided with a limited position space 214, and the second fastening member 201 includes a fastening tooth; or the first fastening member 21 includes a fastening tooth, and the second fastening member 201 has a limited position space 214; the fastening tooth is at least partially accommodated in the limited position space 214 and the two are matched in the axial upper limit position of the connecting tube 100, so as to realize the fastening connection between the first fastening member 21 and the second fastening member 201. Among them, the first fastening member 21 is provided with a limited position space 214, and the limited position space 214 can be defined between the first fastening member 21 and the outer wall of the sleeve 22.

Specifically, the first fastening member 21 is connected to the outer wall of the sleeve 22, so that after the sleeve 22 and the pipe joint 200 are plugged in, the first fastening member 21 can be fastened with the second fastening member 201 to achieve a stable connection between the connecting pipe 100 and the pipe joint 200.

Specifically, when the first fastening member 21 is provided with a limited position space 214, the second fastening member 201 includes a corresponding fastening tooth. When the second fastening member 201 includes a fastening tooth, the second fastening member 201 is provided with a limited position space 214. The first fastening member 21 and the second fastening member 201 are provided correspondingly to achieve a fastening connection.

Specifically, at least a portion of the snap-fitting teeth can be embedded in the limiting space 214, and the snap-fitting teeth and the limiting space 214 cooperate with the axial upper limit of the liner pipe 1, so as to facilitate the snap-fitting of the first snap-fitting member 21 and the second snap-fitting member 201, thereby completing the assembly of the connecting pipe 100 and the pipe joint 200.

Optionally, the first snap-fitting member 21 includes a first limiting portion 211, a second limiting portion 212 and a snap-fitting portion 213; the first limiting portion 211 and the sleeve 22 are arranged at radial intervals along the sleeve 22, one end of the first limiting portion 211 is fixed to the sleeve 22 through the second limiting portion 212, and the other end of the first limiting portion 211 is connected to the snap-fitting portion 213; the snap-fitting portion 213 and the second limiting portion 212 are opposite to each other along the axial direction of the connecting tube 100, and are arranged at radial intervals with the sleeve 22 along the sleeve 22, the snap-fitting portion 213, the first limiting portion 211, the second limiting portion 212 and the sleeve 22 enclose a limiting space 214; the second snap-fitting member 201 is snap-fitted in the limiting space 214.

In an embodiment of the utility model, the snap-fitting portion 213, the first limiting portion 211, the second limiting portion 212 and the sleeve 22 can be enclosed to form a limiting space 214, and the snap-fitting portion 213 and the sleeve 22 can be arranged at radial intervals along the sleeve 22 to form the limiting space 214, so that the second snap-fitting component 201 is snap-fitted in the limiting space 214, and the limiting space 214 can produce a limiting effect on the second snap-fitting component 201 from the axial direction of the connecting tube 100.

Optionally, as shown in Figure 9, the pipe joint 200 may include a joint body 203 and a second fastener 201, and the second fastener 201 is arranged on the outer wall of the joint body 203 and protrudes from the outer wall of the joint body 203; the second fastener 201 can be arranged at the end of the joint body 203 so that the second fastener 201 can be fastened into the limiting space 214 from the limiting space 214.

Specifically, the joint tube body 20 can be sleeved on the outside of the sleeve 22 of the connecting pipe 100, and the second fastening piece 201 protrudes from the outer wall of the joint tube body 203. After the second fastening piece 201 is buckled into the limiting space 214, the second fastening piece 201 and the fastening part 213 of the first fastening piece 21 restrict each other, so that the pipe joint 200 and the connecting pipe 100 can be plugged in.

Further, as shown in Figures 1 and 9, along the axial direction of the pipe joint 200 and along the direction from the middle position of the pipe joint 200 to the end, the radial cross-section of the second fastening piece 201 along the pipe joint 200 gradually decreases, so that the second fastening piece 201 has a guiding bevel 202. The guiding bevel 202 can play a guiding role, making it easier for the second fastening piece 201 to be buckled into the limiting space 214, thereby reducing the difficulty of assembling the second fastening piece 201 with the first fastening piece 21.

Optionally, the snap-fitting portion 213 includes a relative connecting end 2132 and a guide end 2133; the connecting end 2132 is connected to the first limiting portion 211; there is a gap between the guide end 2133 and the sleeve 22; a guide surface 2131 is provided on the side of the guide end 2133 away from the second limiting portion 212, and the end of the guide surface 2131 away from the connecting end 2132 is inclined toward the second limiting portion 212.

In the embodiment of the utility model, the end of the guide surface 2131 away from the connecting end 2132 is inclined toward the second limiting portion 212, so that the guide surface 2131 can guide the second fastening member 201, making it easier for the second fastening member 201 to be fastened into the limiting space 214.

Optionally, the connecting pipe 100 further includes a sealing ring 3 ; the sealing ring 3 abuts between the sleeve 22 and the pipe joint 200 .

In the embodiment of the utility model, the sealing ring 3 can be used to seal the sleeve 22 and the pipe joint 200, which can improve the sealing between the connecting pipe 100 and the pipe joint 200 and prevent leakage of the fluid medium.

Optionally, a limiting groove 221 is provided on the outer wall ring of the connecting pipe 100 ; at least a part of the sealing ring 3 is embedded in the limiting groove 221 .

In the embodiment of the utility model, at least a portion of the sealing ring 3 is embedded in the limiting groove 221, which can improve the reliability of relative fixation between the sealing ring 3 and the connecting pipe 100, thereby effectively ensuring the stability of the sealed connection between the connecting pipe 100 and the pipe joint 200.

Specifically, at least part of the sealing ring 3 is embedded in the limiting groove 221, and at least part of it protrudes from the limiting groove 221. The sealing ring 3 is squeezed by the inner wall of the pipe joint 200 and deformed, thereby generating contact pressure on the sealing contact surface between the sealing ring 3 and the pipe joint 200 to achieve sealing.

Specifically, as shown in Figures 2 and 3, a limiting groove 221 is provided on one side of the sleeve 22 facing the limiting space 214. Since the pipe joint 200 is connected to the second flow channel on the inner liner pipe 1, a sealing ring 3 is embedded in the limiting groove 221 to achieve sealing between the sleeve 22 and the second fastener 201, thereby preventing the fluid medium from leaking from the position where the sealing ring 3 is located.

Generally, the first fastener 21 and the sleeve 22 are integrally formed, and the first fastener 21 is relatively small in thickness and relatively poor in rigidity. In the present embodiment, the first fastener 21 is provided with a first reinforcing protrusion 215 to increase the rigidity of the first fastener 21, thereby ensuring the connection reliability between the first fastener 21 and the second fastener 201 and avoiding the breakage of the two when they are fastened and subjected to force.

In other embodiments, the second fastening member 201 is provided with a second reinforcing protrusion.

Alternatively, in some other embodiments, the first fastening member 21 is provided with a first reinforcing protrusion 215 , and the second fastening member 201 is provided with a second reinforcing protrusion.

In some embodiments, the connecting tube 100 may be a double-layer tube structure. The embodiment is described in detail below:

The connecting pipe 100 may further include an inner liner pipe 1, a sleeve 22 is sleeved on at least one axial end of the inner liner pipe 1, and the inner liner pipe 1 is connected to the pipe joint 200. It should be noted that a corresponding first flow channel 13 is provided in the inner liner pipe 1, and the first flow channel 13 is connected to the second flow channel of the pipe joint 200. In some embodiments, the first flow channel 13 is coaxial with the channel 13 of the sleeve 22 and is overlapped. In this case, the first flow channel 13 and the channel 13 can be regarded as the same structure.

Specifically, as shown in FIG. 2 , the sleeve 22 is disposed at the end of the liner pipe 1 , so that the pipe joint 200 can be inserted into the sleeve 22 .

Optionally, as shown in Figures 7 and 8, sleeves 22 are provided at both ends of the inner liner tube 1, so that the sleeves 22 located at both ends of the inner liner tube 1 can be respectively plugged into the pipe joints 200 of the two adjacent liquid cooling plates 300, which is beneficial to the anti-mistake of the connecting pipe 100, facilitates to improve the assembly efficiency, can realize the connection between the two liquid cooling plates 300, and the fluid medium in the two liquid cooling plates 300 can flow through the connecting pipe 100.

Optionally, the rigidity of at least part of the liner pipe 1 is smaller than the rigidity of the casing 22, and the liner pipe 1 may be deformed along its axial direction and/or radial direction.

In some embodiments, the inner liner tube 1 can be deformed in its axial and/or radial direction. In this way, when the space between the pipe joints 200 of two adjacent liquid cooling plates 300 is limited, the inner liner tube 1 can be deformed to absorb the assembly tolerance when the connecting tube 100 and the pipe joint 200 are installed, avoid the existence of stress, and further avoid the connecting tube 100 from escaping or breaking when being installed with the pipe joint 200 on the liquid cooling plate 300, thereby reducing the risk of damage to the connecting tube 100.

Specifically, the liner pipe 1 may be flexible to ensure that the liner pipe 1 absorbs assembly tolerances. The sleeve 22 may be a rigid member to ensure reliability of assembly between the connecting pipe 100 and the pipe joint 200.

Specifically, sleeves 22 are respectively provided at both ends of the inner liner pipe 1 , so that there is a certain distance between the two sleeves 22 , which can avoid the two sleeves 22 from contacting each other and provide the inner liner pipe 1 with sufficient deformation space.

Specifically, in the process of assembling the connecting pipe 100 and the liquid cooling plate 300, due to the fastening of the first fastener 21 and the second fastener 201, the installation tolerance along the axial direction of the inner liner tube 1 can be absorbed to a certain extent; and due to the flexible nature of the inner liner tube 1, the inner liner tube 1 can be deformed in the radial and/or axial direction, thereby absorbing the installation tolerance along the radial and/or axial direction of the inner liner tube 1.

For example, taking the axial direction of the liner tube 1 as the X-axis direction, when using the connecting pipe 100 to connect two liquid cooling plates 300, when the two pipe joints 200 are positionally offset along the radial Y-axis direction and/or Z-axis direction of the liner tube 1, the liner tube 1 can produce radial deformation and absorb the tolerance of this part.

Optionally, a limiting protrusion 23 is provided on the inner wall of the sleeve 22 ; along the axial direction of the inner liner pipe 1 , the limiting protrusion 23 abuts against the end surface of the inner liner pipe 1 .

In the embodiment of the utility model, along the axial direction of the inner liner tube 1, the limiting protrusion 23 abuts against the end face of the inner liner tube 1, so that the limiting protrusion 23 covers the end face of the inner liner tube 1, so as to protect the end face of the inner liner tube 1, and prevent the fluid medium from scouring the end face of the inner liner tube 1 during the circulation process, thereby preventing the inner liner tube 1 from being deformed, displaced or detached, thereby ensuring the reliability of using the connecting pipe 100 to connect the liquid cooling plate 300.

Optionally, the inner liner pipe 1 includes: a sleeve portion 11, the sleeve 22 is sleeved on the sleeve portion 11, and the sleeve portion 11 has a first sub-channel; a connecting portion 12, the connecting portion 12 and the sleeve portion 11 are connected along the axial direction of the inner liner pipe 1, the connecting portion 12 has a second sub-channel, and the second sub-channel is connected to the first sub-channel to form a first flow channel 13; the wall thickness of the connecting portion 12 is greater than the wall thickness of the sleeve portion 11.

In the embodiment of the utility model, the wall thickness of the connecting portion 12 is greater than the wall thickness of the sleeve portion 11, so that the rigidity of the connecting portion 12 is higher than the rigidity of the sleeve portion 11, which can improve the structural strength of the inner liner pipe 1, and can prevent the inner liner pipe 1 from being damaged by foreign objects, thereby ensuring the sealing of the first flow channel 13.

Specifically, the connecting portion 12 and the sleeve portion 11 are integrally formed, so that the first sub-channel and the second sub-channel are integrally formed. Alternatively, the connecting portion 12 and the sleeve portion 11 can also be fixed by splicing, and the first sub-channel and the second sub-channel can be sealed and connected to effectively ensure the sealing of the first flow channel 13.

Specifically, the inner diameters of the second sub-channel and the first sub-channel are equal, so that the connecting portion 12 protrudes outward from the sleeve portion 11 to ensure that the wall thickness of the connecting portion 12 is greater than the wall thickness of the sleeve portion 11 .

Specifically, when the sleeves 22 are arranged at both ends of the inner liner pipe 1, the inner liner pipe 1 may include a sleeve portion 11, a connecting portion 12 and a sleeve portion 11 arranged in sequence along its axial direction; the sleeve portion 11 is used to sleeve the sleeve 22; and the connecting portion 12 is used to connect the two sleeve portions 11.

Optionally, the outer wall of the connecting portion 12 protrudes from the outer wall of the sleeve portion 11 along the radial direction of the inner liner pipe 1 so that the inner liner pipe 1 has a step portion 14; the sleeve 22 is assembled and connected to the step portion 14, and the sleeve 22 abuts against the step portion 14 along the axial direction of the inner liner pipe 1.

In the embodiment of the utility model, the outer wall of the connecting portion 12 protrudes from the outer wall of the sleeve portion 11 along the radial direction of the inner liner pipe 1, so that the inner liner pipe 1 has a step portion 14, so that the inner liner pipe 1 can form a transition zone, and this transition zone can cooperate with the sleeve 22 to facilitate the assembly and fixation of the inner liner pipe 1 and the sleeve 22, thereby preventing the inner liner pipe 1 and the sleeve 22 from being separated due to subsequent assembly or erosion of the fluid medium.

In the embodiment of the utility model, the inner liner tube 1 and the sleeve 22 are integrally formed, so that the manufacturing cost can be reduced. Specifically, the inner liner tube 1 and the sleeve 22 can form a parting line on the axial end surface.

The thermal management system in the embodiment of the utility model has at least the following advantages:

In the embodiment of the utility model, the connecting tube is inserted into the inside of the tube joint, that is, the tube joint with greater rigidity is sleeved on the outside of the connecting tube, thereby suppressing the expansion and deformation of the connecting tube, improving the connection reliability between the connecting tube and the tube joint, and improving the safety of the battery pack.

In a second aspect, an embodiment of the utility model further discloses a battery pack, which may include the above-mentioned thermal management system.

In the embodiment of the utility model, the battery pack can utilize the above-mentioned thermal management system to achieve the function of cooling and heat dissipation.

The battery pack in the embodiment of the present invention includes the above advantages.

In the description of this specification, the description with reference to the terms "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 invention. In this specification, the schematic representation of the above terms does 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.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (17)

1. A thermal management system, characterized in that it comprises: a connecting pipe (100) and a plurality of liquid cooling plates (300), wherein the plurality of liquid cooling plates (300) are arranged at intervals along a first direction (X), the liquid cooling plates (300) are provided with a pipe joint (200), the connecting pipe (100) is arranged between two adjacent liquid cooling plates (300), and the two axial ends of the connecting pipe (100) are respectively inserted into the pipe joints (200) of the two adjacent liquid cooling plates (300) to connect the two adjacent liquid cooling plates (300), and the stiffness of the pipe joint (200) is greater than the stiffness of the connecting pipe (100). 2. The thermal management system according to claim 1 is characterized in that a first protrusion (103) is provided on the outer wall of the connecting tube (100), and the first protrusion (103) extends away from the connecting tube (100) along the radial direction of the connecting tube (100), wherein the connecting tube (100) is inserted into the interior of the pipe joint (200), and the first protrusion (103) and the pipe joint (200) are engaged in an axial stopper of the connecting tube (100) to limit the relative movement of the pipe joint (200) and the connecting tube (100). 3. The thermal management system according to claim 1 is characterized in that the connecting pipe (100) comprises a first pipe section (101) and a second pipe section (102), both axial ends of the first pipe section (101) are connected to the second pipe section (102), the maximum wall thickness of the second pipe section (102) is greater than the maximum wall thickness of the first pipe section (101), and the second pipe section (102) is at least partially inserted into the pipe joint (200). 4. The thermal management system according to claim 3, characterized in that the inner diameters of the first pipe section (101) and the second pipe section (102) are equal. 5. The thermal management system according to claim 1, characterized in that the connecting pipe (100) comprises a first fastening member (21) and a sleeve (22), the first fastening member (21) is connected to the outer wall of the sleeve (22), and the pipe joint (200) has a second fastening member (201); wherein, The sleeve (22) has a channel (13) for circulating a medium; The sleeve (22) is inserted into the pipe joint (200) and the pipe joint (200) is connected to the channel (13); the first fastening member (21) and the second fastening member (201) are fastened together to limit the axial movement of the connecting pipe (100) and the pipe joint (200) along the connecting pipe (100). 6. The thermal management system according to claim 5 is characterized in that the connecting pipe (100) also includes an inner liner pipe (1), the sleeve (22) is sleeved on at least one axial end of the inner liner pipe (1), and the inner liner pipe (1) is connected to the pipe joint (200). 7. The thermal management system according to claim 6 is characterized in that the stiffness of at least part of the inner liner tube (1) is smaller than the stiffness of the sleeve (22), and the inner liner tube (1) can be deformed in its axial and/or radial direction. 8. The thermal management system according to claim 6, characterized in that the outer wall of the inner liner tube (1) at least partially extends away from the inner liner tube (1) in the radial direction of the inner liner tube (1) to form a stepped portion (14); The sleeve (22) is assembled and connected with the stepped portion (14), and the sleeve (22) abuts against the stepped portion (14) along the axial direction of the liner pipe (1). 9. The thermal management system according to claim 6, characterized in that the inner liner tube (1) and the sleeve (22) are integrally formed. 10. The thermal management system according to claim 5, characterized in that: The first fastening member (21) is provided with a limited space (214), and the second fastening member (201) includes fastening teeth; or the first fastening member (21) includes fastening teeth, and the second fastening member (201) is provided with a limited space (214); The locking teeth are at least partially accommodated in the limiting space (214), and the two are matched in the axial upper limit position of the connecting pipe (100). 11. The thermal management system according to claim 10, characterized in that the first fastening member (21) comprises a first limiting portion (211), a second limiting portion (212) and a fastening portion (213); The first limiting portion (211) and the sleeve (22) are arranged at intervals along the radial direction of the sleeve (22); one end of the first limiting portion (211) is fixed to the sleeve (22) via the second limiting portion (212); and the other end of the first limiting portion (211) is connected to the buckling portion (213); The buckling portion (213) and the second limiting portion (212) are opposite to each other along the axial direction of the connecting tube (100), and are spaced apart from each other along the radial direction of the sleeve (22); the buckling portion (213), the first limiting portion (211), the second limiting portion (212) and the sleeve (22) together form the limiting space; The second fastening member (201) is fastened in the limiting space (214). 12. The thermal management system according to claim 11, characterized in that the buckling portion (213) comprises a connecting end (2132) and a guiding end (2133) opposite to each other; The connecting end (2132) is connected to the first limiting portion (211); There is a gap between the guide end (2133) and the sleeve (22); A guide surface (2131) is provided on a side of the guide end (2133) away from the second limiting portion (212), and an end of the guide surface (2131) away from the connecting end (2132) is inclined toward the second limiting portion (212). 13. The thermal management system according to claim 1, characterized in that the connecting pipe (100) further comprises a sealing ring (3); The sealing ring (3) abuts between the connecting pipe (100) and the pipe joint (200). 14. The thermal management system according to claim 13, characterized in that a limiting groove (221) is provided around the outer wall of the connecting pipe (100); At least a portion of the sealing ring (3) is embedded in the limiting groove (221). 15. The thermal management system according to claim 6 is characterized in that a limiting protrusion (23) is also provided on the inner wall of the sleeve (22); along the axial direction of the inner liner tube (1), the limiting protrusion (23) abuts against the end face of the inner liner tube (1). 16. The thermal management system according to claim 5, characterized in that the first fastening member (21) is provided with a first reinforcing protrusion (215); and/or the second fastening member (201) is provided with a second reinforcing protrusion. 17. A battery pack, comprising: a thermal management system according to any one of claims 1 to 16.