CN220021291U

CN220021291U - Liquid cooling system and battery

Info

Publication number: CN220021291U
Application number: CN202321651866.XU
Authority: CN
Inventors: 田艳峰; 金佺良; 於洪将
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2023-11-14
Anticipated expiration: 2033-06-27

Abstract

The utility model relates to the technical field of liquid cooling systems, and discloses a liquid cooling system and a battery, wherein the liquid cooling system comprises at least two liquid cooling modules which are arranged at intervals, and a connecting pipe is connected between every two adjacent liquid cooling modules; the connecting pipe is internally provided with a through communication hole, the communication hole is used for communicating two adjacent liquid cooling modules, two annular elastic pieces are fixed in the communication hole, clamping grooves are formed in the liquid cooling modules, the two liquid cooling modules adjacent to the connecting pipe are respectively inserted into one end corresponding to the communication hole, the inner ring of each elastic piece is contained in the corresponding clamping groove of one liquid cooling module, and the elastic pieces are in a compressed state and are used for sealing gaps between the liquid cooling modules and the hole walls of the communication hole. The utility model mainly solves the technical problems of the existing liquid cooling system that the requirement on the installation space is larger and the sealing reliability is to be improved.

Description

Liquid cooling system and battery

Technical Field

The utility model relates to the technical field of liquid cooling systems, in particular to a liquid cooling system and a battery.

Background

In the battery field, the liquid cooling system plays vital role, and current liquid cooling system includes a plurality of interval arrangement's liquid cooling module, and the gap between two adjacent liquid cooling modules all is used for settling the group battery to realize the cooling of group battery, moreover, link to each other through the connecting pipe between two adjacent liquid cooling modules, so that the coolant liquid can enter into each liquid cooling module respectively through each connecting pipe in, in order for all liquid cooling modules to be adjacent group battery cooling. Specifically, for guaranteeing the leakproofness between liquid cooling module and the connecting pipe, most adopt sealing washer and buckle's mode to connect between current liquid cooling module and the connecting pipe, buckle structure has the shortcoming that the structure is complicated and the cost is higher, and is great to the installation space requirement moreover, is difficult to satisfy the service scenario in little space. In addition, the battery product is because of the inside structure is numerous, especially when parallelly connected a plurality of liquid cooling module, its hookup location quantity is more, can necessarily have assembly tolerance in the assembly process, and its installation accumulation tolerance also can increase along with parallelly connected liquid cooling module quantity increases, leads to each hookup location to take place misplacement, and produces stress concentration in local position, and then leads to connecting pipe and liquid cooling module hookup location to take place the displacement because of the battery vibration in the vehicle driving process to cause the sealed inefficacy of liquid cooling system, arouse the risk of system reliability.

Disclosure of Invention

The utility model aims to provide a liquid cooling system and a battery, which mainly solve the technical problems that the existing liquid cooling system has larger requirement on installation space and the sealing reliability is to be improved.

To achieve the purpose, the utility model adopts the following technical scheme:

the liquid cooling system comprises at least two liquid cooling modules which are arranged at intervals, and connecting pipes are connected between every two adjacent liquid cooling modules;

the connecting pipe is internally provided with a through communication hole, the communication hole is used for communicating two adjacent liquid cooling modules, two annular elastic pieces are fixed in the communication hole, clamping grooves are formed in the liquid cooling modules, the two liquid cooling modules adjacent to the connecting pipe are respectively inserted into one end corresponding to the communication hole, the inner ring of each elastic piece is contained in the corresponding clamping groove of one liquid cooling module, and the elastic pieces are in a compressed state and are used for sealing gaps between the liquid cooling modules and the hole walls of the communication hole.

In one of the technical schemes, the liquid cooling module comprises a liquid cooling main body and a water nozzle which are connected;

the clamping groove is formed in the outer wall of the water nozzle, the water nozzle is inserted into one end corresponding to the communication hole, the elastic piece is used for sealing a gap between the outer wall of the water nozzle and the hole wall of the communication hole, a first channel communicated with the communication hole is formed in the water nozzle, and the first channel is used for the communication hole to be communicated to the inside of the liquid cooling main body.

In one of the technical schemes, the water nozzle is provided with a cone-shaped structure on the outer wall of the end part far away from the liquid cooling main body, the cone-shaped structure is gradually enlarged from the opposite direction of the plugging direction of the water nozzle in the communication hole, the clamping groove is arranged at the adjacent position of the cone-shaped structure enlarged to the maximum position, and the external dimension of the end part enlarged to the maximum position of the cone-shaped structure is larger than the inner ring dimension of the elastic piece but smaller than the outer ring dimension of the elastic piece.

In one of the technical schemes, the water tap is sleeved with a sealing ring at one side of the clamping groove, which is opposite to the conical structure, the sealing ring is contained in the communication hole and is in a compressed state, and the sealing ring is used for sealing a gap between the outer wall of the water tap and the hole wall of the communication hole.

In one of the technical schemes, the water tap is provided with a first boss and a second boss on the outer wall of one side of the clamping groove, which is opposite to the conical structure, a limiting groove for limiting the sealing ring is formed between the first boss and the second boss, and the inner ring of the sealing ring is accommodated in the limiting groove.

In one of the technical schemes, one surface of the first boss, which is opposite to the sealing ring, is a part of the groove wall of the clamping groove.

In one of the technical schemes, one face of the second boss facing the sealing ring is a limiting face, the end part of the connecting pipe is provided with a blocking face, when the water nozzle is inserted into a preset position in the communication hole, the inner ring of the elastic piece is accommodated in the clamping groove of the water nozzle, and the blocking face is abutted to the limiting face.

In one of the technical schemes, the liquid cooling main body comprises a liquid cooling plate and current collectors connected to two end parts of the liquid cooling plate;

the liquid cooling plate is internally provided with at least one penetrating liquid cooling flow passage, the current collector is internally provided with a second passage, the water nozzle is connected with the current collector, and the second passage in the current collector is respectively communicated with the liquid cooling flow passage and the first passage of the water nozzle.

In one of the above technical solutions, one of the current collectors in the liquid cooling main body is used for flowing cooling liquid into the liquid cooling flow channel of the liquid cooling plate, and the other current collector in the liquid cooling main body is used for flowing cooling liquid in the liquid cooling flow channel of the liquid cooling plate outwards.

The utility model also provides a battery, which comprises the liquid cooling system according to any one of the technical schemes.

Compared with the prior art, the liquid cooling system provided by the utility model has at least the following beneficial effects:

according to the scheme, two annular elastic pieces are arranged in the communication hole of the connecting pipe, the clamping grooves are formed in the liquid cooling module, the liquid cooling module can be directly inserted into the communication hole of the connecting pipe during installation, in the process, the elastic pieces deform, after the liquid cooling module is inserted into a preset position, the inner ring of the elastic pieces is contained in the clamping grooves of the liquid cooling module due to elasticity, the elastic pieces serve as sealing pieces, assembly tolerance of the liquid cooling module can be absorbed, the liquid cooling system is prevented from having larger internal stress locally, mechanical strength and safety of the liquid cooling system are improved, the position of the liquid cooling module is limited by the elastic pieces, the liquid cooling module cannot be continuously inserted or easily pulled out, and accordingly the phenomenon that the liquid cooling module deviates relative to the connecting pipe under the working condition of vehicle vibration is avoided, and good sealing performance is ensured between the connecting pipe and the liquid cooling module; compared with the traditional liquid cooling system adopting the buckle for fixing, the liquid cooling system has the advantages of simpler structure, lower cost and small space required for installation, and can avoid the problem of difficult assembly caused by the trend of pipelines and other space limitations, thereby reducing the assembly difficulty of battery products; in addition, the elastic piece and the sealing ring can be simultaneously used when the liquid cooling module is connected with the connecting pipe, and the sealing reliability between the liquid cooling module and the connecting pipe can be further improved in a double sealing mode.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of a liquid cooling system according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the liquid cooling system shown in FIG. 1;

FIG. 3 is a further exploded view of the liquid cooling system of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a partial enlarged view at B in FIG. 3;

FIG. 6 is a schematic view of a water nozzle according to an embodiment of the present utility model;

FIG. 7 is a schematic structural diagram of a connecting tube and an elastic member according to an embodiment of the present utility model;

FIG. 8 is a top view of the liquid cooling system shown in FIG. 1;

fig. 9 is a cross-sectional view at C-C in fig. 8.

Wherein, each reference sign in the figure:

10. a liquid cooling module; 101. a liquid-cooled main body; 1011. a liquid cooling plate; 10111. a liquid cooling runner; 1012. a current collector; 10121. a second channel; 102. a water tap; 1021. a first channel; 1022. a clamping groove; 1023. a cone-shaped structure; 1024. a first boss; 1025. a second boss; 10251. a limiting surface; 1026. a limit groove;

20. a connecting pipe; 201. a communication hole; 202. a blocking surface;

30. an elastic member; 40. a seal ring; 50. and a receiving area.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

Referring to fig. 1 to 7 together, the present embodiment provides a liquid cooling system, including at least two liquid cooling modules 10 arranged at intervals, a receiving area 50 between two adjacent liquid cooling modules 10 is used for placing a heat generating device (such as a battery or other semiconductor devices), the liquid cooling modules 10 are used for cooling the heat generating device, two adjacent liquid cooling modules 10 are connected with a connecting pipe 20, the connecting pipe 20 may be made of PA or PP with stronger hardness, a through communication hole 201 is formed in the connecting pipe 20, two end portions of the connecting pipe 20 are bell-mouthed in shape, so as to facilitate the insertion of the liquid cooling modules 10, the communication hole 201 of the connecting pipe 20 is used for communicating two adjacent liquid cooling modules 10, so that cooling liquid can flow into each liquid cooling module 10, and thus each liquid cooling module 10 can cool the adjacent heat generating device.

The liquid cooling module 10 specifically includes an adjacent liquid cooling main body 101 and a water nozzle 102, the interior of the water nozzle 102 has a first passage 1021, the first passage 1021 is communicated to the interior of the liquid cooling main body 101, the water nozzle 102 is further used for being inserted into the communication hole 201 of the connection pipe 20, and when the water nozzle 102 is inserted into the communication hole 201, the first passage 1021 of the water nozzle 102 and the communication hole 201 of the connection pipe 20 are communicated with each other, so that the communication hole 201 can be communicated to the interior of the liquid cooling main body 101 through the first passage 1021. The two sides of each liquid cooling module 10 are respectively provided with the water nozzle 102, the plurality of liquid cooling modules 10 are connected in parallel through the connecting pipe 20, the straight arrow in fig. 1 is the flowing direction of the cooling liquid, as can be seen from fig. 1, the water nozzle 102 on one side is used for supplying the cooling liquid to flow into the liquid cooling main bodies 101, and the water nozzle 102 on the other side is used for supplying the cooling liquid in the liquid cooling main bodies 101 to flow outwards, so that the purpose of cooling a plurality of heating devices is achieved.

In order to facilitate the cooling function of the liquid cooling main body 101, the liquid cooling main body 101 specifically includes a liquid cooling plate 1011 and two current collectors 1012, the two current collectors 1012 are welded at two opposite ends of the liquid cooling plate 1011, at least one liquid cooling runner 10111 is provided in the liquid cooling plate 1011, and the cross-sectional shape of the liquid cooling runner 10111 may be rectangular, U-shaped or Z-shaped, etc. The second channel 10121 is formed in the current collector 1012, the water nozzle 102 is welded on at least one side surface of the current collector 1012, and the second channel 10121 in the current collector 1012 is respectively communicated with the liquid cooling channel 10111 in the liquid cooling plate 1011 and the first channel 1021 in the water nozzle 102. One of the current collectors 1012 in the liquid cooling body 101 is used for flowing the cooling liquid into the liquid cooling flow channel 10111 of the liquid cooling plate 1011, and the other current collector 1012 in the liquid cooling body 101 is used for flowing the cooling liquid in the liquid cooling flow channel 10111 of the liquid cooling plate 1011 outwards. Referring to fig. 1, in the liquid feeding process, the cooling liquid enters from the first channel 1021 of the water nozzle 102 at one side, then enters into the second channel 10121 of the current collector 1012, and flows into the liquid cooling channel 10111 of the liquid cooling plate 1011; when the liquid is discharged, the cooling liquid flows out from the liquid cooling channels 10111 of the liquid cooling plates 1011 into the second channels 10121 of the corresponding current collectors 1012, and then flows out along the water nozzle 102 on the other side.

Referring to fig. 6 to 9, two ring-shaped elastic members 30 are fixed in the communication hole 201 of the connection pipe 20, the material of the elastic members 30 may be TPE, the side surface of the outer wall of the elastic member 30 is preferably a cylindrical surface, the outer wall of the water nozzle 102 is provided with a clamping groove 1022, when two adjacent liquid cooling modules 10 are respectively connected in parallel through the connection pipe 20, the water nozzles 102 of the two liquid cooling modules 10 are respectively inserted into the corresponding connection pipe 20, at this time, the inner rings of the two elastic members 30 in the connection pipe 20 are respectively received in the clamping grooves 1022 of the water nozzle 102 of the corresponding one liquid cooling module 10, and the elastic members 30 are in a compressed state, and the elastic members 30 are used for sealing a gap between the outer wall of the water nozzle 102 and the wall of the communication hole 201 in the connection pipe 20, so as to avoid leakage of cooling liquid from the gap between the water nozzle 102 and the inner wall of the connection pipe 20.

Referring to fig. 6 to 9 again, the water nozzle 102 is provided with a tapered structure 1023 on the outer wall of the end far from the liquid cooling main body 101, the tapered structure 1023 is gradually enlarged from the water nozzle 102 to the direction opposite to the direction of inserting the communication hole 201, the clamping groove 1022 is disposed at the adjacent position of the tapered structure 1023 where the tapered structure is enlarged to the maximum, and the external dimension of the end of the tapered structure 1023 where the tapered structure is enlarged to the maximum is larger than the inner ring dimension of the elastic member 30 but smaller than the outer ring dimension of the elastic member 30. When the water nozzle 102 is inserted into the connecting pipe 20 along the communication hole 201, the conical structure 1023 will press the inner ring of the elastic member 30 to deform the elastic member 30, and when the conical structure 1023 passes over the elastic member 30, the elastic member 30 will spontaneously fall into the clamping groove 1022 due to its elasticity, and at this time, the water nozzle 102 is inserted into the preset position in the connecting pipe 20. By providing the taper structure 1023, the water nozzle 102 can resist the elasticity of the elastic member 30 and be more easily inserted into the preset position in the connecting pipe 20, and at the same time, the taper structure 1023 also serves to prevent the water nozzle 102 from being outwardly biased due to vibration, thereby ensuring the stability and reliability of the liquid cooling system during operation.

Referring to fig. 5, 6 and 9, the water nozzle 102 is sleeved with a sealing ring 40 on a side of the slot 1022 facing away from the taper structure 1023, when the water nozzle 102 is inserted into a preset position in the connecting pipe 20 along the connecting hole 201, the sealing ring 40 is also accommodated in the connecting hole 201 of the connecting pipe 20, and the sealing ring 40 is also in a compressed state, and the sealing ring 40 is also used for sealing a gap between an outer wall of the water nozzle 102 and a wall of the connecting hole 201 so as to further prevent the coolant from leaking outwards.

Referring to fig. 5, 6 and 9 again, the water nozzle 102 is provided with a first boss 1024 and a second boss 1025 protruding from the outer wall of the side of the slot 1022 facing away from the conical structure 1023, the first boss 1024 and the second boss 1025 are preferably annular structures surrounding the outer wall of the water nozzle 102, and a limit groove 1026 for limiting the sealing ring 40 can be formed between the first boss 1024 and the second boss 1025 by arranging the first boss 1024 and the second boss 1025, and the inner ring of the sealing ring 40 is accommodated in the limit groove 1026. Through setting up first boss 1024 and second boss 1025, can restrict sealing washer 40 in the position of water injection well choke 102, when water injection well choke 102 outwards pulls out or inwards peg graft for connecting pipe 20, sealing washer 40 can not outwards go out from water injection well choke 102 outer wall, ensures that sealing washer 40 can accept the appointed position in connecting pipe 20 when water injection well choke 102 peg graft the preset position in connecting pipe 20 to ensure to have better leakproofness between water injection well choke 102 and the connecting pipe 20. Next, to simplify the structure of the water nozzle 102, in this embodiment, a surface of the first boss 1024 facing away from the seal ring 40 is used as a part of the groove wall of the clamping groove 1022. In addition, the outer diameter of the second boss 1025 is larger than the inner diameter of the communication hole 201, and the surface of the second boss 1025 facing the sealing ring 40 is a limiting surface 10251, and the end of the connecting pipe 20 is provided with a blocking surface 202, when the water nozzle 102 is plugged into a preset position in the connecting pipe 20, the limiting surface 10251 of the second boss 1025 will abut against the blocking surface 202 at the end of the connecting pipe 20, and the blocking surface 202 is used for limiting the plugging depth of the water nozzle 102 so as to ensure that the inner ring of the elastic member 30 can be reliably accommodated in the clamping groove 1022 on the outer wall of the water nozzle 102 when the water nozzle 102 is plugged into place.

In summary, in the solution, two annular elastic members 30 are disposed in the communication hole 201 of the connection pipe 20, and the clamping groove 1022 is disposed on the liquid cooling module 10, when the liquid cooling module 10 is installed, the liquid cooling module 10 can be directly inserted into the communication hole 201 of the connection pipe 20, in this process, the elastic members 30 will deform, when the water nozzle 102 of the liquid cooling module 10 is inserted into the preset position, the elastic members 30 will have elasticity to enable the inner ring of the elastic members to be accommodated into the clamping groove 1022 of the liquid cooling module 10, and the second boss 1025 of the water nozzle 102 will abut against the blocking surface 202 at the end of the connection pipe 20, the elastic members 30 not only serve as sealing members, but also can absorb the assembly tolerance of the liquid cooling module 10, so as to avoid the local existence of large internal stress of the liquid cooling system, improve the mechanical strength and safety of the liquid cooling system, and limit the position of the liquid cooling module 10, so that the liquid cooling module 10 can not be easily inserted and pulled out, and further, the liquid cooling module 10 will not shift relative to the connection pipe 20 under the vehicle vibration condition, thereby ensuring good sealing performance between the connection pipe 20 and the liquid cooling module 10; compared with the traditional liquid cooling system adopting the buckle for fixing, the liquid cooling system has the advantages of simpler structure, lower cost and small space required for installation, and can avoid the problem of difficult assembly caused by the trend of pipelines and other space limitations, thereby reducing the assembly difficulty of battery products; in addition, the water nozzle 102 of the liquid cooling module 10 and the connection pipe 20 are sealed by the elastic member 30, and the sealing ring 40 is used, so that the reliability of the sealing between the liquid cooling module 10 and the connection pipe 20 can be further improved by the double sealing method.

The embodiment also provides a battery, which includes the liquid cooling system and a plurality of battery cells according to the above technical scheme, referring to fig. 1, at least one battery cell is disposed in a receiving area 50 between two adjacent liquid cooling modules 10, and the liquid cooling modules 10 are configured to cool the battery cell, so that the battery cell can be charged or discharged within a preset range. Due to the adoption of the liquid cooling system, the battery of the embodiment also has the advantages of convenience in assembly, small occupied space and high sealing reliability.

The liquid cooling system of this scheme not only can be used in the battery field, but also can be applied in fields such as energy storage or household electrical appliances.

The foregoing description of the preferred embodiments of the present utility model has been provided for the purpose of illustrating the general principles of the present utility model and is not to be construed as limiting the scope of the utility model in any way. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model, and other embodiments of the present utility model as will occur to those skilled in the art without the exercise of inventive faculty, are intended to be included within the scope of the present utility model.

Claims

1. The liquid cooling system is characterized by comprising at least two liquid cooling modules (10) which are arranged at intervals, wherein connecting pipes (20) are connected between every two adjacent liquid cooling modules (10);

the connecting pipe (20) is internally provided with a through communication hole (201), the communication hole (201) is used for communicating two adjacent liquid cooling modules (10), two annular elastic pieces (30) are fixed in the communication hole (201), clamping grooves (1022) are formed in the liquid cooling modules (10), two liquid cooling modules (10) adjacent to the connecting pipe (20) are respectively inserted into one end corresponding to the communication hole (201), the inner ring of the elastic piece (30) is accommodated in the corresponding clamping groove (1022) of one liquid cooling module (10), and the elastic piece (30) is in a compressed state and is used for sealing gaps between the liquid cooling modules (10) and the hole walls of the communication hole (201).

2. The liquid cooling system according to claim 1, wherein the liquid cooling module (10) comprises a liquid cooling main body (101) and a water nozzle (102) which are connected;

the clamping groove (1022) is formed in the outer wall of the water nozzle (102), the water nozzle (102) is inserted into one end corresponding to the communication hole (201), the elastic piece (30) is used for sealing a gap between the outer wall of the water nozzle (102) and the hole wall of the communication hole (201), a first channel (1021) communicated with the communication hole (201) is formed in the water nozzle (102), and the first channel (1021) is used for enabling the communication hole (201) to be communicated to the inside of the liquid cooling main body (101).

3. The liquid cooling system according to claim 2, wherein the water nozzle (102) is provided with a tapered structure (1023) on an outer wall of an end portion remote from the liquid cooling main body (101), the tapered structure (1023) is gradually enlarged from a direction opposite to an insertion direction in which the water nozzle (102) is inserted into the communication hole (201), the clamping groove (1022) is provided at a position adjacent to a position where the tapered structure (1023) is enlarged to a maximum, and an outer dimension of the tapered structure (1023) enlarged to the maximum position is larger than an inner dimension of the elastic member (30) but smaller than an outer dimension of the elastic member (30).

4. A liquid cooling system according to claim 3, wherein the water nozzle (102) is sleeved with a sealing ring (40) at one side of the clamping groove (1022) facing away from the conical structure (1023), the sealing ring (40) is accommodated in the communication hole (201) and is in a compressed state, and the sealing ring (40) is used for sealing a gap between an outer wall of the water nozzle (102) and a hole wall of the communication hole (201).

5. The liquid cooling system according to claim 4, wherein the water nozzle (102) is provided with a first boss (1024) and a second boss (1025) protruding from an outer wall of one side of the clamping groove (1022) opposite to the conical structure (1023), a limiting groove (1026) for limiting the sealing ring (40) is formed between the first boss (1024) and the second boss (1025), and an inner ring of the sealing ring (40) is accommodated in the limiting groove (1026).

6. The liquid cooling system according to claim 5, wherein a side of the first boss (1024) facing away from the seal ring (40) is a portion of a groove wall of the clamping groove (1022).

7. The liquid cooling system according to claim 5, wherein a surface of the second boss (1025) facing the sealing ring (40) is a limiting surface (10251), a blocking surface (202) is provided at an end of the connecting pipe (20), when the water nozzle (102) is plugged into a preset position in the communication hole (201), an inner ring of the elastic member (30) is accommodated in a clamping groove (1022) of the water nozzle (102), and the blocking surface (202) abuts against the limiting surface (10251).

8. The liquid cooling system according to claim 2, wherein the liquid cooling main body (101) includes a liquid cooling plate (1011) and a current collector (1012) connected to both end portions of the liquid cooling plate (1011);

the liquid cooling plate (1011) is internally provided with at least one penetrating liquid cooling flow passage (10111), the current collector (1012) is internally provided with a second passage (10121), the water nozzle (102) is connected with the current collector (1012), and the second passage (10121) in the current collector (1012) is respectively communicated with the liquid cooling flow passage (10111) and the first passage (1021) of the water nozzle (102).

9. The liquid cooling system according to claim 8, wherein one of the current collectors (1012) in the liquid cooling main body (101) is used for flowing cooling liquid into the liquid cooling flow channel (10111) of the liquid cooling plate (1011), and the other current collector (1012) in the liquid cooling main body (101) is used for flowing cooling liquid in the liquid cooling flow channel (10111) of the liquid cooling plate (1011) outwards.

10. A battery comprising the liquid cooling system according to any one of claims 1 to 9.