CN221126050U - Thermal management system and battery pack - Google Patents

Abstract

The utility model discloses a thermal management system and a battery pack, and belongs to the technical field of batteries. The heat management system comprises a connecting pipe and a plurality of liquid cooling plates, the liquid cooling plates are arranged at intervals along the first direction, the liquid cooling plates are provided with pipe joints, the connecting pipe is arranged between two adjacent liquid cooling plates, two ends of the connecting pipe in the axial direction are respectively inserted into the pipe joints of the two adjacent liquid cooling plates so as to be communicated with the two adjacent liquid cooling plates, and the rigidity of the pipe joints is greater than that 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, further improve the reliability of the connection between the adjacent liquid cooling plates and avoid the condition of liquid leakage between the 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 particularly relates to a thermal management system and a battery pack.

Background

At present, the battery pack adopts the cooling mode of liquid cooling plates, and the adjacent liquid cooling plates need to be communicated, and are generally communicated through connecting pipes and pipe joints.

The existing scheme is that the pipe joint is inserted into the connecting pipe, the connecting pipe is sleeved outside the pipe joint to achieve cooperation between the pipe joint and the connecting pipe, however, when the temperature of a cooling medium in a liquid cooling system is increased or the pressure in the pipe is increased due to other conditions, the pressure in the pipe acts on the connecting pipe to easily cause expansion deformation of the external connecting pipe, so that the condition of liquid leakage occurs at the contact surface between the connecting pipe and the pipe joint, and the safety of a battery pack is affected.

Disclosure of Invention

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

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

In a first aspect, an embodiment of the present utility model proposes a thermal management system comprising: the liquid cooling plates are arranged along the first direction X at intervals, the liquid cooling plates are provided with pipe joints, the connecting pipes are arranged between two adjacent liquid cooling plates, two axial ends of the connecting pipes are respectively inserted into the pipe joints of the two adjacent liquid cooling plates so as to be communicated with the two adjacent liquid cooling plates, and the rigidity of the pipe joints is larger than that of the connecting pipes.

Optionally, the outer wall of the connecting pipe is provided with a first protrusion, the first protrusion extends away from the connecting pipe along the radial direction of the connecting pipe, wherein the connecting pipe is inserted into the pipe joint, and the first protrusion and the pipe joint are in stop fit in the axial direction of the connecting pipe so as to limit the relative movement of the pipe joint and the connecting pipe.

Optionally, the connecting pipe comprises a first pipe section and a second pipe section, both ends of the axial direction of the first pipe section are connected with the second pipe section, the maximum wall thickness of the second pipe section is larger than that of the first pipe section, and the second pipe section is at least partially inserted into the pipe joint.

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

Optionally, the connecting pipe comprises a first buckling piece and a sleeve, the first buckling piece is connected to the outer wall of the sleeve, and the pipe joint is provided with a second buckling piece; wherein,

The sleeve having a passage for a flow medium;

The sleeve is inserted into the pipe joint and is communicated with the channel, and the first buckling piece and the second buckling piece are buckled and connected to limit the axial movement of the connecting pipe and the pipe joint along the connecting pipe.

Optionally, the connecting pipe further comprises a lining pipe, the sleeve is sleeved at least one end part of the lining pipe in the axial direction, and the lining pipe is communicated with the pipe joint.

Optionally, the lining tube has at least a part of a stiffness less than the stiffness of the casing tube, the lining tube being deformable in its axial and/or radial direction.

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

The sleeve is connected with the step part in an assembling way, and the sleeve is abutted with the step part along the axial direction of the lining pipe.

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

Optionally, the first buckling piece is provided with a limiting space, and the second buckling piece comprises buckling teeth; or the first buckling piece comprises buckling teeth, and the second buckling piece is provided with a limiting space;

The buckling teeth are at least partially accommodated in the limiting space and are in limiting fit with each other in the axial direction of the connecting pipe.

Optionally, the first fastener includes a first limiting portion, a second limiting portion, and a fastening portion;

The first limiting part and the sleeve are arranged at intervals along the radial direction of the sleeve, one end of the first limiting part is fixed with the sleeve through the second limiting part, and the other end of the first limiting part is connected with the buckling part;

The buckling part is opposite to the second limiting part along the axial direction of the connecting pipe and is arranged with the sleeve at intervals along the radial direction of the sleeve, and the buckling part, the first limiting part, the second limiting part and the sleeve enclose to form the limiting space;

The second buckling piece is buckled in the limiting space.

Optionally, the buckling part comprises opposite connecting ends and guiding ends;

the connecting end is connected with the first limiting part;

A gap is formed between the guide end and the sleeve;

One side of the guide end, which is far away from the second limiting part, is provided with a guide surface, and one end of the guide surface, which is far away from the connecting end, is inclined towards the second limiting part.

Optionally, the connecting pipe further comprises a sealing ring;

The sealing ring is abutted between the connecting pipe and the pipe joint.

Optionally, a limit groove is formed in the outer wall of the connecting pipe in a surrounding mode;

at least part of the sealing ring is embedded in the limiting groove.

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

along the axial direction of the lining pipe, the limiting protrusion is abutted with the end face of the lining pipe.

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

In a second aspect, an embodiment of the present utility model provides a battery pack including the above thermal management system.

In the embodiment of the utility model, the connecting pipe is inserted into the pipe joint, namely, the pipe joint with higher rigidity is sleeved outside the connecting pipe, so that the expansion deformation of the connecting pipe is restrained, the connection reliability of the connecting pipe and the pipe joint is improved, and the safety of the battery pack is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a structure in which a connecting pipe is fitted to a pipe joint according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a connecting pipe according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a connecting pipe according to an embodiment of the present utility model;

FIG. 4 is a schematic view showing the structure of another connecting pipe according to the embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of another connecting tube according to an embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of still another connecting tube according to an embodiment of the present utility model;

FIG. 7 is a schematic illustration of a thermal management assembly in accordance with an embodiment of the utility model;

FIG. 8 is a schematic diagram of a split construction of a thermal management assembly in an embodiment of the utility model;

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

Reference numerals:

1-lining pipe, 11-sleeving part, 12-connecting part, 13-first runner, 14-step part, 21-first fastener, 211-first limit part, 212-second limit part, 213-fastening part, 2131-guide surface, 2132-connecting end, 2133-guide end, 214-limit space, 215-first reinforcing protrusion, 22-sleeve, 221-limit groove, 23-limit protrusion, 3-seal ring, 100-connecting pipe, 101-first pipe section, 102-second pipe section, 103-first protrusion, 200-pipe joint, 201-second fastener, 202-guide inclined plane, 203-joint pipe body, 300-liquid cooling plate.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The features of the utility model "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

The term "parallel" in the present application includes not only the case of absolute parallelism but also the case of general parallelism as conventionally recognized in engineering, for example, "parallel" refers to a state in which straight lines form an angle of-1 ° to 1 ° with straight lines, straight lines form a plane, or plane form a plane; meanwhile, "vertical" includes not only the case of absolute vertical but also the case of substantially vertical as conventionally recognized in engineering, for example, "vertical" refers to a state in which an angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89 ° to 91 °. The distances are equal or the angles are equal, not only the absolute equal condition is included, but also the general equal condition of the conventional cognition in engineering is included, and certain errors can exist, such as a state that the tolerance range is between-1% and 1%.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The thermal management system and the battery pack described in the embodiments of the present utility model are described below with reference to fig. 1 to 9.

As shown in fig. 1 and 2, the thermal management system in the embodiment of the present utility model may specifically include a connection pipe 100 and a plurality of liquid cooling plates 300, where the plurality of liquid cooling plates 300 are disposed at intervals along a first direction X, the liquid cooling plates 300 are provided with pipe joints 200, the connection pipe 100 is disposed between two adjacent liquid cooling plates 300, and two axial ends of the connection pipe 100 are respectively inserted into the pipe joints 200 of the two adjacent liquid cooling plates 300 to communicate with the two adjacent liquid cooling plates 300, and the rigidity of the pipe joints 200 is greater than that of the connection pipe 100.

In the embodiment of the utility model, the connecting pipe 100 is inserted into the pipe joint 200, the rigidity 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 pressure of the cooling medium to the connecting pipe 100 and the pipe joint 200 is increased due to temperature rise or other conditions, the connecting pipe 100 inserted into the pipe joint 200 is expanded and deformed more than the pipe joint 200, so as to squeeze the pipe joint 200, so that the contact surface connection between the two is tighter, the connection reliability of the connecting pipe 100 and the pipe joint 200 is improved, and the condition of liquid leakage of a thermal management system is avoided.

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, and may be that the rigidity of any part of the pipe joint 200 is greater than the rigidity of any part of the connecting pipe 100; the rigidity of the portion of the pipe joint 200 which is inserted into the connection pipe 100 may be greater than the rigidity of the inserted portion of the connection pipe 100. The pipe joint 200 may be made of a material with higher rigidity, such as steel or aluminum, and the connecting pipe 100 may be made of a material with lower rigidity, such as plastic; or 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 larger than that of the connecting pipe 100, and the rigidity difference of the pipe joint 200 and the connecting pipe 100 can be realized, so that the effect of more tightly matching the pipe joint 200 and the connecting pipe after being pressed is achieved.

Specifically, the first direction is a direction in which the plurality of liquid cooling plates 300 are disposed at intervals, and the first direction coincides with the axial direction of the connection pipe 100 and the axial direction of the pipe joint 200, as shown in fig. 1, and is an X direction indicated by an arrow.

In the embodiment of the present utility model, as shown in fig. 4, the outer wall of the connection pipe 100 is provided with a first protrusion 103, the first protrusion 103 extends away from the connection pipe 100 along the radial direction of the connection pipe 100, wherein the connection pipe 100 is inserted into the pipe joint 200, and the first protrusion 103 and the pipe joint 200 are in stop fit with each other in the axial direction of the connection pipe 100 so as to limit the relative movement between the pipe joint 200 and the connection pipe 100, it is understood that the first protrusion 103 has a space from the end of the connection pipe 100 in the axial direction of the connection pipe 100, and after the connection pipe 100 is inserted into the pipe joint 200 for a certain distance, the first protrusion 103 and the pipe joint 200 have a blocking effect in the axial direction of the connection pipe 100 so as to limit the connection pipe 100 and the pipe joint 200 to continue to move toward each other. Specifically, at least two first protrusions 103 may be disposed at intervals along the axial direction of the connection pipe 100, and the pipe joints 200 at two axial ends of the connection pipe 100 are respectively in stop fit with one first protrusion 103, which may be that the pipe joints are disposed in one-to-one correspondence with the first protrusions 103. In this way, the first protrusion 103 on the connection pipe 100 receives two opposite forces in the axial direction, so that the connection between the connection pipe 100 and the pipe joint 200 is more reliable, the connection pipe 100 and the pipe joint 200 are prevented from falling off, and the safety of the thermal management system is improved.

In the embodiment of the present utility model, the first protrusion 103 may be integrally formed with the connection pipe 100, thereby reducing manufacturing costs and improving connection reliability between the first protrusion 103 and the connection pipe 100. In other embodiments, the first protrusion 103 and the connecting tube 100 may be welded or fused, which is not limited herein.

In the embodiment of the present utility model, as shown in fig. 4, the connection pipe 100 includes a first pipe segment 101 and a second pipe segment 102, where the second pipe segment 102 is connected to two axial ends of the first pipe segment 101, the maximum wall thickness of the second pipe segment 102 is greater than that of the first pipe segment 101, and the second pipe segment 102 is at least partially inserted into the pipe joint 200. It can be understood that the connecting pipe 100 has an i-shaped structure, and two ends are large and small in the middle, so that two ends with larger wall thickness of the connecting pipe 100 are used for being inserted with the pipe joint 200, so that the rigidity of the end of the connecting pipe 100 is higher than that of the middle part, the middle part is easier to deform, thereby absorbing assembly tolerance, the rigidity of the end is higher (but smaller than that of the pipe joint 200), ensuring that the end can bear larger pressure in the assembly process, avoiding that the installation is impossible due to the larger deformation, and affecting the assembly yield.

In the embodiment of the present 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, so that the inner diameters are equal, and the fluid medium inside can flow through the inner diameter, thereby ensuring uniformity of flow resistance in the connecting pipe 100.

In the embodiment of the present utility model, the connection pipe 100 includes a first fastening member 21 and a sleeve 22, the first fastening member 21 is coupled to the outer wall of the sleeve 22, the pipe joint 200 has a second fastening member 201, and the sleeve 22 has a passage for a flowing medium; the sleeve 22 is inserted into the pipe joint 200 and is connected with the pipe joint communication channel, the first buckling piece 21 and the second buckling piece 201 are buckled and connected to limit the movement of the connecting pipe 100 and the pipe joint 200 along the axial direction of the connecting pipe 100, so that the reliability and stability of assembly between the connecting pipe 100 and the pipe joint 200 can be improved, the reliability of connection between the adjacent liquid cooling plates 300 can be improved, and the condition of liquid leakage between the adjacent liquid cooling plates 300 is avoided.

Specifically, the first fastening member 21 and the second fastening member 201 are fastened to achieve the insertion of the connection pipe 100 and the pipe joint 200, so that the connection pipe 100 and the liquid cooling plate 300 are assembled, rapid installation can be achieved, and the installation efficiency is improved. Moreover, the first and second snap-fit members 21 and 201 can provide a limit in the axial direction of the connection pipe 100, and can absorb the installation tolerance of the connection pipe 100 and the liquid cooling plate 300 in the axial direction of the connection pipe 100.

Specifically, the connection pipe 100 has the first fastening member 21, and since the pipe joint 200 can be inserted into the connection pipe 100 and communicate with the passage 13 of the sleeve 22, the connection pipe 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 of the flow medium, which may communicate with the passage 13.

By way of example, a first liquid cooling plate and a second liquid cooling plate disposed adjacently will be described as follows: the fluid medium can flow from the second flow channel on the first fluid-cooled plate coupling 200 into the channel 13 and then into the second flow channel on the second fluid-cooled plate coupling 200.

Optionally, the first fastener 21 is attached to the outer wall of the sleeve 22; the first buckling piece 21 is provided with a limiting space 214, and the second buckling piece 201 comprises buckling teeth; or the first buckling piece 21 comprises buckling teeth, and the second buckling piece 201 is provided with a limiting space 214; the buckling teeth are at least partially accommodated in the limiting space 214 and are in limiting fit with each other in the axial direction of the connecting pipe 100, so that buckling connection between the first buckling piece 21 and the second buckling piece 201 is facilitated. The first fastening member 21 is provided with a limiting space 214, and the limiting space 214 may 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 is plugged into the pipe joint 200, the first fastening member 21 can be fastened with the second fastening member 201, so as to achieve a stable connection between the connecting pipe 100 and the pipe joint 200.

Specifically, in the case that the first fastening member 21 is provided with the limiting space 214, the second fastening member 201 includes fastening teeth correspondingly. In the case that the second fastening member 201 includes fastening teeth, a limiting space 214 is correspondingly disposed on the second fastening member 201. The first fastening member 21 and the second fastening member 201 are disposed in correspondence to achieve a snap-fit connection.

Specifically, at least part of the fastening teeth may be embedded in the limiting space 214, and the fastening teeth and the limiting space 214 are in limiting fit with each other in the axial direction of the lining tube 1, so as to facilitate fastening of the first fastening member 21 and the second fastening member 201, and further complete assembling of the connecting tube 100 and the tube joint 200.

Optionally, the first fastener 21 includes a first limiting portion 211, a second limiting portion 212, and a fastening portion 213; the first limiting part 211 and the sleeve 22 are arranged at intervals along the radial direction of the sleeve 22, one end of the first limiting part 211 is fixed with the sleeve 22 through the second limiting part 212, and the other end of the first limiting part 211 is connected with the buckling part 213; the buckling part 213 is opposite to the second limiting part 212 along the axial direction of the connecting pipe 100 and is arranged at intervals along the radial direction of the sleeve 22 with the sleeve 22, and the buckling part 213, the first limiting part 211, the second limiting part 212 and the sleeve 22 enclose to form a limiting space 214; the second fastening member 201 is fastened in the limiting space 214.

In the embodiment of the present utility model, the fastening portion 213, the first limiting portion 211, the second limiting portion 212 and the sleeve 22 may enclose to form a limiting space 214, and the fastening portion 213 and the sleeve 22 may be disposed at intervals along a radial direction of the sleeve 22 to form the limiting space 214, so that the second fastening member 201 is fastened in the limiting space 214, and the limiting space 214 may perform a limiting function on the second fastening member 201 from an axial direction of the connecting pipe 100.

Alternatively, as shown in fig. 9, the pipe joint 200 may include a joint pipe body 203 and a second fastening member 201, where the second fastening member 201 is disposed on an outer wall of the joint pipe body 203 and protrudes from the outer wall of the joint pipe body 203; the second fastener 201 may be disposed at an end of the connector body 203 so that the second fastener 201 is fastened into the limiting space 214 from the limiting space 214.

Specifically, the joint pipe body 20 may be sleeved outside the sleeve 22 of the connecting pipe 100, the second buckling piece 201 protrudes out of the outer wall of the joint pipe body 203, and after the second buckling piece 201 is buckled into the limiting space 214, the buckling parts 213 of the second buckling piece 201 and the first buckling piece 21 are mutually limited, so that the pipe joint 200 and the connecting pipe 100 can be plugged.

Further, as shown in fig. 1 and 9, the second fastener 201 gradually decreases in the radial cross section of the pipe joint 200 along the axial direction of the pipe joint 200 and along the direction of the middle position of the pipe joint 200 toward the end, so that the second fastener 201 has a guiding inclined plane 202, and the guiding inclined plane 202 can play a guiding role, so that the second fastener 201 is conveniently buckled into the limiting space 214, and the assembly difficulty of the second fastener 201 and the first fastener 21 is reduced.

Optionally, the clasp 213 includes opposite connecting ends 2132 and guide ends 2133; the connecting end 2132 is connected with the first limiting part 211; a gap is provided between the guide end 2133 and the sleeve 22; the guide end 2133 is provided with a guide surface 2131 on a side away from the second limiting portion 212, and one 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 present utility model, the end of the guide surface 2131 away from the connecting end 2132 is inclined towards the second limiting portion 212, so that the guide surface 2131 can guide the second fastener 201, and facilitate the second fastener 201 to be fastened into the limiting space 214.

Optionally, the connection tube 100 further comprises a sealing ring 3; the seal ring 3 abuts between the sleeve 22 and the pipe joint 200.

In the embodiment of the utility model, the sleeve 22 and the pipe joint 200 can be sealed by using the sealing ring 3, so that the tightness between the connecting pipe 100 and the pipe joint 200 can be improved, and leakage of a fluid medium can be avoided.

Optionally, the outer wall ring of the connection pipe 100 is provided with a limit groove 221; at least part of the sealing ring 3 is embedded in the limit groove 221.

In the embodiment of the utility model, at least part of the sealing ring 3 is embedded in the limiting groove 221, so that the reliability of relative fixation between the sealing ring 3 and the connecting pipe 100 can be improved, and the stability of sealing connection between the connecting pipe 100 and the pipe joint 200 can be further effectively ensured.

Specifically, at least part of the sealing ring 3 is embedded in the limit groove 221, at least part of the sealing ring is protruded out of the limit groove 221, and the sealing ring 3 is extruded by the inner wall of the pipe joint 200 to deform, so that contact pressure can be caused on a sealing contact surface of the sealing ring 3 and the pipe joint 200, and sealing is realized.

Specifically, as shown in fig. 2 and 3, a limiting groove 221 is formed on a side of the sleeve 22 facing the limiting space 214, and since the pipe joint 200 is communicated with the second flow channel on the liner pipe 1, the sealing ring 3 is embedded in the limiting groove 221 to realize sealing between the sleeve 22 and the second buckling piece 201, so that leakage of fluid medium from the position where the sealing ring 3 is located can be avoided.

Generally, the first fastening member 21 is integrally formed with the sleeve 22, and the first fastening member 21 has a smaller thickness and a poorer rigidity; in this embodiment, the first fastening member 21 is provided with the first reinforcing protrusions 215 to increase the rigidity of the first fastening member 21, so as to ensure the connection reliability of the first fastening member 21 and the second fastening member 201, and avoid the breakage of the first fastening member 21 and the second fastening member when the fastening members are subjected to force.

In other embodiments, second fastener 201 is provided with a second reinforcing protrusion.

Alternatively, in other embodiments, first fastener 21 can have first reinforcing protrusions 215 and second fastener 201 can have second reinforcing protrusions.

In some embodiments, the connection pipe 100 may have a double-layered pipe structure, and this embodiment is described in detail below:

The connecting pipe 100 may further include a liner pipe 1, the sleeve 22 is sleeved on at least one axial end of the liner pipe 1, and the liner pipe 1 is communicated with the pipe joint 200. It should be noted that, the liner tube 1 is provided with a corresponding first flow channel 13, and the first flow channel 13 communicates with the second flow channel of the pipe joint 200, and in some embodiments, the first flow channel 13 is coaxial with and overlaps with the channel 13 of the sleeve 22, where the first flow channel 13 and the channel 13 may be regarded as the same structure.

Specifically, as shown in fig. 2, a sleeve 22 is provided at the end of the lining tube 1, facilitating the insertion of the pipe joint 200 into the sleeve 22.

Alternatively, as shown in fig. 7 and 8, the two ends of the lining pipe 1 are respectively provided with the sleeves 22, so that the sleeves 22 positioned at the two ends of the lining pipe 1 can be respectively inserted into the pipe joints 200 of the two adjacent liquid cooling plates 300, thereby facilitating the foolproof of the connecting pipe 100, improving the assembly efficiency, realizing the connection between the two liquid cooling plates 300, and circulating the fluid medium in the two liquid cooling plates 300 through the connecting pipe 100.

Optionally, the lining tube 1 is at least partially less rigid than the sleeve 22, and the lining tube 1 may be deformed axially and/or radially thereof.

In some embodiments, the lining pipe 1 may deform axially and/or radially, so that in the case that the space between the pipe joints 200 of two adjacent liquid cooling plates 300 is limited, the lining pipe 1 may deform to absorb the assembly tolerance of the connection pipe 100 and the pipe joints 200, so as to avoid stress, and further avoid the break-loose or fracture phenomenon of the connection pipe 100 when the connection pipe 100 is installed with the pipe joints 200 on the liquid cooling plates 300, and reduce the risk of damage to the connection pipe 100.

In particular, the liner tube 1 may be flexible to ensure that the liner tube 1 absorbs assembly tolerances. The sleeve 22 may be a rigid member to ensure the reliability of the assembly of the connection pipe 100 with the pipe joint 200.

Specifically, the two ends of the lining tube 1 are respectively provided with the sleeves 22, so that a certain distance is reserved between the two sleeves 22, the two sleeves 22 can be prevented from being contacted, and enough deformation space can be provided for the lining tube 1.

Specifically, in the process of assembling the connection pipe 100 and the liquid cooling plate 300, since the first and second fasteners 21 and 201 are fastened, it is possible to absorb the installation tolerance in the axial direction of the liner pipe 1 to some extent; due to the flexible nature of the liner tube 1, the liner tube 1 may deform in a radial and/or axial direction, thereby absorbing installation tolerances in the radial and/or axial direction of the liner tube 1.

For example, in the case where the two liquid cooling plates 300 are connected by the connection pipe 100 using the axial direction of the lining pipe 1 as the X-axis direction, when the two pipe joints 200 are shifted in the radial Y-axis direction and/or the Z-axis direction of the lining pipe 1, the lining pipe 1 can be deformed radially and the tolerance of the portion can be absorbed.

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

In the embodiment of the utility model, along the axial direction of the lining pipe 1, the limiting protrusion 23 is abutted against the end surface of the lining pipe 1, so that the limiting protrusion 23 covers the end surface of the lining pipe 1 to play a role in protecting the end surface of the lining pipe 1, so that the end surface of the lining pipe 1 is prevented from being washed by a fluid medium in the circulation process, deformation displacement or separation of the lining pipe 1 is avoided, and the reliability of connecting the liquid cooling plate 300 by using the connecting pipe 100 is further ensured.

Optionally, the liner tube 1 comprises: the sleeving part 11, the sleeve 22 is sleeved on the sleeving part 11, and the sleeving part 11 is provided with a first sub-channel; a connecting portion 12, the connecting portion 12 and the sleeve portion 11 being connected in the axial direction of the liner tube 1, the connecting portion 12 having a second sub-passage, the second sub-passage communicating with the first sub-passage to form a first flow passage 13; the wall thickness of the connecting portion 12 is larger than that of the fitting portion 11.

In the embodiment of the utility model, the wall thickness of the connecting part 12 is larger than the wall thickness of the sleeving part 11, so that the rigidity of the connecting part 12 is higher than that of the sleeving part 11, the structural strength of the lining pipe 1 can be improved, the lining pipe 1 can be prevented from being damaged by invasion of foreign objects, and the tightness of the first flow channel 13 is further ensured.

Specifically, the connection portion 12 and the sleeve portion 11 are integrally formed, so that the first sub-channel and the second sub-channel are integrally formed. Or the connecting part 12 and the sleeving part 11 can be fixed in a splicing mode, and the first sub-channel and the second sub-channel can be connected in a sealing mode, so that the sealing performance of the first flow channel 13 is effectively ensured.

Specifically, the inner diameters of the second sub-channel and the first sub-channel are equal, so that the connecting portion 12 protrudes outside the sleeving portion 11, and the wall thickness of the connecting portion 12 is ensured to be larger than that of the sleeving portion 11.

Specifically, in the case where the sleeves 22 are provided at both ends of the lining pipe 1, the lining pipe 1 may include a fitting portion 11, a connecting portion 12, and a fitting portion 11 that are sequentially provided in the axial direction thereof; the sleeving part 11 is used for sleeving the sleeve 22; the connecting portion 12 is used to connect the two fitting portions 11.

Alternatively, the outer wall of the connecting portion 12 protrudes from the outer wall of the sleeve portion 11 in the radial direction of the liner tube 1, so that the liner tube 1 has a stepped portion 14; the sleeve 22 is fitted to the stepped portion 14, and the sleeve 22 abuts against the stepped portion 14 in the axial direction of the liner tube 1.

In the embodiment of the utility model, the outer wall of the connecting part 12 protrudes from the outer wall of the sleeving part 11 along the radial direction of the lining pipe 1, so that the lining pipe 1 is provided with the step part 14, the lining pipe 1 can form a transition zone, and the transition zone can be matched with the sleeve 22, thereby facilitating the assembly and the fixation of the lining pipe 1 and the sleeve 22, and further preventing the subsequent assembly or the flushing of a fluid medium from separating the lining pipe 1 from the sleeve 22.

In the embodiment of the present utility model, the inner liner 1 and the sleeve 22 are integrally formed. Thereby manufacturing costs can be reduced. In particular, the liner tube 1 and the sleeve 22 may form a parting line at the axial end face.

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

In the embodiment of the utility model, the connecting pipe is inserted into the pipe joint, namely, the pipe joint with higher rigidity is sleeved outside the connecting pipe, so that the expansion deformation of the connecting pipe is restrained, the connection reliability of the connecting pipe and the pipe joint is improved, and the safety of the battery pack is improved.

In a second aspect, the embodiment of the utility model also discloses a battery pack, and the battery pack can comprise the thermal management system.

In the embodiment of the utility model, the battery pack can realize the effect of cooling and radiating by utilizing the thermal management system.

The battery pack in the embodiment of the utility model includes the advantages described above.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (17)

1. A thermal management system, comprising: connecting pipe (100) and a plurality of liquid cooling board (300), a plurality of liquid cooling board (300) are along first direction (X) interval setting, liquid cooling board (300) are provided with coupling (200), connecting pipe (100) set up in adjacent two between liquid cooling board (300), just connecting pipe (100) axial both ends are inserted respectively and are located adjacent two liquid cooling board (300) coupling (200) are inside to communicate adjacent two liquid cooling board (300), the rigidity of coupling (200) is greater than the rigidity of connecting pipe (100).

2. The thermal management system according to claim 1, wherein the outer wall of the connection pipe (100) is provided with a first protrusion (103), the first protrusion (103) extending away from the connection pipe (100) in a radial direction of the connection pipe (100), wherein the connection pipe (100) is inserted inside the pipe joint (200), and the first protrusion (103) and the pipe joint (200) are in stop fit in an axial direction of the connection pipe (100) to limit a relative movement of the pipe joint (200) and the connection pipe (100).

3. The thermal management system according to claim 1, wherein the connection pipe (100) comprises a first pipe section (101) and a second pipe section (102), the second pipe section (102) is connected to both axial ends of the first pipe section (101), the maximum wall thickness of the second pipe section (102) is larger than the maximum wall thickness of the first pipe section (101), and the second pipe section (102) is at least partially inserted inside the pipe joint (200).

4. A thermal management system according to claim 3, wherein the first tube section (101) and the second tube section (102) have equal inner diameters.

5. The thermal management system of claim 1, wherein the connection tube (100) comprises a first fastener (21) and a sleeve (22), the first fastener (21) being connected to an outer wall of the sleeve (22), the tube joint (200) having a second fastener (201); wherein,

The sleeve (22) has a channel (13) for a flow medium;

The sleeve (22) is inserted into the pipe joint (200) and the pipe joint (200) is communicated with the channel (13), and the first buckling piece (21) and the second buckling piece (201) are buckled and connected 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, wherein the connection pipe (100) further comprises a lining pipe (1), the sleeve (22) is sleeved on at least one end portion of the lining pipe (1) in the axial direction, and the lining pipe (1) is communicated with the pipe joint (200).

7. The thermal management system according to claim 6, wherein the inner liner tube (1) has at least partially a smaller stiffness than the sleeve (22), the inner liner tube (1) being deformable in its axial and/or radial direction.

8. The thermal management system according to claim 6, wherein an outer wall of the inner liner tube (1) extends at least partially in a radial direction of the inner liner tube (1) away from the inner liner tube (1) to form a step (14);

The sleeve (22) is assembled and connected with the step part (14), and the sleeve (22) is abutted with the step part (14) along the axial direction of the lining pipe (1).

9. The thermal management system according to claim 6, wherein the liner tube (1) and the sleeve (22) are integrally formed.

10. The thermal management system of claim 5, wherein,

The first buckling piece (21) is provided with a limiting space (214), and the second buckling piece (201) comprises buckling teeth; or the first buckling piece (21) comprises buckling teeth, and the second buckling piece (201) is provided with a limiting space (214);

The buckling teeth are at least partially accommodated in the limiting space (214) and are in limiting fit with each other in the axial direction of the connecting pipe (100).

11. The thermal management system of claim 10, wherein the first fastener (21) comprises a first retainer portion (211), a second retainer portion (212), and a fastener portion (213);

The first limiting parts (211) and the sleeve (22) are arranged at intervals along the radial direction of the sleeve (22), one end of each first limiting part (211) is fixed with the sleeve (22) through the corresponding second limiting part (212), and the other end of each first limiting part (211) is connected with the corresponding buckling part (213);

the buckling part (213) is opposite to the second limiting part (212) along the axial direction of the connecting pipe (100) and is arranged with the sleeve (22) at intervals along the radial direction of the sleeve (22), and the buckling part (213), the first limiting part (211), the second limiting part (212) and the sleeve (22) enclose to form the limiting space;

the second buckling piece (201) is buckled in the limiting space (214).

12. The thermal management system of claim 11, wherein the snap-fit portion (213) comprises opposing connection ends (2132) and guide ends (2133);

The connecting end (2132) is connected with the first limiting part (211);

-a gap is provided between the guide end (2133) and the sleeve (22);

One side of the guide end (2133) far away from the second limiting part (212) is provided with a guide surface (2131), and one end of the guide surface (2131) far away from the connecting end (2132) is inclined towards the second limiting part (212).

13. The thermal management system according to claim 1, wherein the connection pipe (100) further comprises a sealing ring (3);

the sealing ring (3) is abutted between the connecting pipe (100) and the pipe joint (200).

14. The thermal management system according to claim 13, wherein the outer wall of the connection tube (100) is annularly provided with a limit groove (221);

At least part of the sealing ring (3) is embedded in the limit groove (221).

15. The thermal management system according to claim 6, wherein the sleeve (22) is further provided with a limit projection (23) on an inner wall thereof; along the axial direction of the lining pipe (1), the limiting protrusion (23) is abutted with the end face of the lining pipe (1).

16. The thermal management system of claim 5, wherein the first fastener (21) is provided with a first reinforcing protrusion (215); and/or the second fastener (201) is provided with a second reinforcing protrusion.

17. A battery pack, comprising: the thermal management system of any one of claims 1-16.