CN218827517U

CN218827517U - Liquid cooling plate assembly, cooling device and battery pack

Info

Publication number: CN218827517U
Application number: CN202223105022.3U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Aiways Automobile Co Ltd
Current assignee: Aiways Automobile Co Ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-04-07
Anticipated expiration: 2032-11-22

Abstract

The utility model provides a liquid cooling plate component, a cooling device and a battery pack, which relate to the technical field of batteries, and the liquid cooling plate component provided by the utility model comprises a liquid cooling plate and current collecting ends arranged at two ends of the liquid cooling plate; the flow collecting end is provided with a flow collecting cavity, the top of the flow collecting end is provided with a liquid inlet and outlet communicated with the flow collecting cavity, and the end part of the flow collecting cavity is provided with a mounting port; the end part of the liquid cooling plate is inserted in the mounting opening, the inner cavity of the liquid cooling plate is communicated with the manifold, and the liquid cooling plate is used for being mounted between two adjacent rows of electric cores. The utility model provides a liquid cooling plate subassembly simple structure can place between two adjacent rows of electric cores, forms the single cooling water route of advancing singly and going out, can effectively carry out cooling to electric core lateral wall, and cooling area is big, further promotes electric core and fills the performance soon.

Description

Liquid cooling plate assembly, cooling device and battery pack

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a liquid cooling board subassembly, cooling device and battery package are related to.

Background

In the battery package use, electric core can produce a large amount of heats, and especially the battery is filled the performance requirement and is constantly promoted soon, if not in time take away the heat will unable promotion battery fill the performance soon to influence the charge-discharge performance and the life-span of battery.

In the prior art, an air deflector is generally additionally arranged between adjacent electric cores or a liquid cooling plate is additionally arranged at the bottom of the electric core. However, the air deflector needs to take away the heat dissipated from the surface of the battery core through the flow of air, and the adoption of the method has strong dependence on the mobility of the air and poor cooling effect. The contact area between the liquid cooling plate and the battery core is small, and the cooling effect is still poor.

Therefore, how to provide a cooling plate, a cooling assembly and a battery pack with better cooling effect on a battery core is one of the technical problems to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid cooling board subassembly, simple structure can place between two adjacent rows of electric cores and form the cooling water route of singly advancing singly to go out, and cooling area is big, can effectively carry out cooling to electric core lateral wall. Also provided are a cooling device including the above liquid cooling plate assembly and a battery pack including the above liquid cooling plate assembly or cooling device.

In order to achieve the above object, the utility model provides a following technical scheme:

in a first aspect, the present invention provides a liquid cooling plate assembly, including a liquid cooling plate and collecting tips installed at two ends of the liquid cooling plate;

the flow collecting end is provided with a flow collecting cavity, the top of the flow collecting end is provided with a liquid inlet and outlet communicated with the flow collecting cavity, and the end part of the flow collecting cavity is provided with a mounting port;

the end part of the liquid cooling plate is inserted into the mounting opening, the inner cavity of the liquid cooling plate is communicated with the manifold, and the liquid cooling plate is used for being mounted between two adjacent rows of electric cores.

Further, the top of installing port department is equipped with the last step face that is used for the restriction the liquid cooling board cartridge degree of depth, and/or, the bottom of installing port department is equipped with the lower step face that is used for the restriction the liquid cooling board cartridge degree of depth.

Further, the mass flow end includes the mass flow body and closing cap subassembly, the mass flow body has been seted up the business turn over liquid mouth with the installing port, closing cap subassembly lid is located the both sides of the mass flow body and with the mass flow body forms the manifold.

Further, the cover assembly comprises a first cover and a second cover, the first cover and the second cover are oppositely buckled on two sides of the current collector, one side of the first cover facing the current collector is provided with a first step surface for limiting the position of the first cover relative to the current collector, and one side of the second cover facing the current collector is provided with a second step surface for limiting the position of the second cover relative to the current collector.

Further, be provided with on the mass flow body connect in the water injection well choke that business turn over liquid mouth department connects, the water injection well choke connects to pass through business turn over liquid mouth with the manifold intercommunication.

Further, the mass flow body deviates from the concave groove that is used for holding of being equipped with of one end of liquid cooling board the groove of dodging that the water injection well choke connects, the business turn over liquid mouth is seted up in dodge on the groove.

In a second aspect, the utility model also provides a cooling device, including water intake pipe, outlet pipe way and above-mentioned scheme the liquid cooling board subassembly, it is a plurality of the liquid cooling board subassembly sets up side by side and the interval, water intake pipe and each liquid cooling board one end on the mass flow end business turn over liquid mouth intercommunication, outlet pipe way and each the liquid cooling board other end on the mass flow end business turn over liquid mouth intercommunication.

Furthermore, the water inlet pipeline with the water outlet pipeline all includes end cap and a plurality of three way connection that communicate in proper order, is located arbitrary one end three way connection installs the end cap is located the liquid cooling board is with each of one side business turn over liquid mouth and each three way connection one-to-one communicates.

Furthermore, the adjacent three-way joints are connected through a hose.

A third aspect of the present invention provides a battery pack, which comprises a plurality of rows of battery cells and the above-mentioned solution, wherein each of the liquid cooling plate assemblies is installed between two adjacent rows of the battery cells.

The utility model provides a liquid cooling plate subassembly, cooling device and battery package can produce following beneficial effect:

when the liquid cooling plate assembly is used, the liquid cooling plate assembly can be installed between two adjacent rows of electric cores, cooling liquid can be centrally discharged to a liquid inlet and outlet at the top end of the current collecting end at one end of the liquid cooling plate through the water inlet pipeline and enters an inner cavity of the liquid cooling plate through a current collecting cavity in the current collecting end to take away heat of the liquid cooling plate, heat is dissipated to the side surface of the electric core, then the cooling liquid enters the current collecting cavity in the current collecting end at the other end of the liquid cooling plate and is centrally discharged to a water outlet pipeline through the liquid inlet and outlet on the current collecting end at the end, and a single-inlet and single-outlet cooling water path is formed in the liquid cooling plate assembly.

Compared with the prior art, the utility model discloses the liquid cooling board subassembly simple structure that the first aspect provided can place between two adjacent rows of electric cores, the mass flow end only set up one be used for business turn over coolant liquid business turn over liquid mouth can, form the cooling water route of singly advancing singly going out, can effectively carry out cooling to electric core lateral wall, cooling area is big, further promotes electric core and fills the performance soon.

Compared with the prior art, the utility model discloses the cooling device that the second aspect provided includes water inlet pipe, outlet pipe way and a plurality of above-mentioned liquid cooling board subassembly, and water inlet pipe can arrange each liquid cooling board subassembly into with the coolant liquid respectively, and outlet pipe way can receive each liquid cooling board subassembly exhaust coolant liquid to make each liquid cooling board of flowing through that the coolant liquid can be abundant, the cooling effect is better.

Compared with the prior art, the utility model discloses the battery package that the third aspect provided includes multirow electric core and above-mentioned cooling device, and the heat of self is taken away to the both sides accessible liquid cooling board of electric core, and the cooling effect is good, can further promote electric core and fill the performance soon.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic three-dimensional structure diagram of a liquid cooling plate assembly according to the present invention;

fig. 2 is a schematic diagram of a three-dimensional structure when a plurality of liquid cooling plate assemblies are matched with a plurality of rows of battery cells according to the present invention;

fig. 3 is a schematic diagram of a three-dimensional structure of a single liquid cooling plate assembly according to the present invention when the single liquid cooling plate assembly is matched with a single row of battery cells;

fig. 4 is an exploded view of an end structure of a liquid cooling plate assembly according to the present invention at a first viewing angle;

fig. 5 is an exploded view of an end structure of a liquid cooling plate assembly according to the present invention at a second viewing angle;

fig. 6 is a schematic cross-sectional structure view of a liquid cooling plate according to the present invention;

fig. 7 is a schematic diagram of an explosion structure of a battery pack according to the present invention;

fig. 8 is a schematic diagram of a three-dimensional structure of a battery pack provided by the present invention;

FIG. 9 is an enlarged view of a portion of the structure at A in FIG. 8;

fig. 10 is a schematic view of a longitudinal section structure of the water inlet pipeline provided by the present invention.

Icon: 1-liquid cooling plate; 2-a current collecting end; 21-a manifold; 22-a current collector; 221-mounting port; 222-upper step surface; 223-lower step surface; 224-avoidance slot; 23-a closure assembly; 231-a first cover; 2311-a first step surface; 232-a second cover; 2321-a second step surface; 24-water nozzle joint; 3-electric core; 4-a water inlet pipeline; 41-plug; 42-a three-way joint; 43-a hose; 5-water outlet pipeline; 6-battery box.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

An embodiment of the first aspect of the present invention is to provide a liquid cooling plate assembly, as shown in fig. 1 to 5, including a liquid cooling plate 1 and current collecting terminals 2 installed at two ends of the liquid cooling plate 1; the collecting end 2 is provided with a collecting cavity 21, the top of the collecting end 2 is provided with a liquid inlet and outlet communicated with the collecting cavity 21, and the end part of the collecting cavity 21 is provided with a mounting port 221; the end part of the liquid cooling plate 1 is inserted into the mounting port 221, the inner cavity of the liquid cooling plate 1 is communicated with the manifold 21, and the liquid cooling plate 1 is used for being mounted between two adjacent rows of electric cores 3.

As shown in fig. 1, two ends of the liquid cooling plate 1 are provided with current collecting terminals 2, one of the current collecting terminals 2 receives cooling liquid through a liquid inlet and outlet, and transfers the cooling liquid into the liquid cooling plate 1 through a current collecting cavity 21 of the current collecting terminal 2, the cooling liquid enters the current collecting cavity 21 in the current collecting terminal 2 at the other end of the liquid cooling plate 1 after passing through the liquid cooling plate 1, and is discharged through the liquid inlet and outlet on the current collecting terminal 2, so as to form a single-inlet and single-outlet cooling water channel, which can effectively cool the side walls of the electric cores 3 at two sides, and further improve the quick charging performance of the electric cores 3.

In addition, liquid cooling plate 1 in above-mentioned liquid cooling plate subassembly can directly be inserted in the installing port 221 department of mass flow end 2, can welded fastening between the two, and connection structure is simple, the assembly of being convenient for.

The structure of the current collecting tip 2 is specifically described below:

in some embodiments, as shown in fig. 4, the top end of the mounting opening 221 is provided with an upper step surface 222 for limiting the insertion depth of the liquid-cooling plate 1, or the bottom end of the mounting opening 221 is provided with a lower step surface 223 for limiting the insertion depth of the liquid-cooling plate 1.

The arrangement of the upper step surface 222 or the lower step surface 223 can effectively limit the insertion depth of the liquid cooling plate 1, so that the length and the size of the liquid cooling plate assembly can be unified conveniently, the situation that the cooling liquid in the collecting chamber 21 cannot smoothly enter the liquid cooling plate 1 due to too deep insertion is avoided, and meanwhile, the situation that the connection between the liquid cooling plate 1 and the collecting end 2 is not firm due to too shallow insertion is also avoided.

In at least one embodiment, the top end of the mounting opening 221 is provided with an upper step surface 222, and the bottom end is provided with a lower step surface 223.

The upper step surface 222 may be formed by the following design: distance between the top of installing port 221 and the top surface of mass flow end 2 is less than the wall thickness of mass flow end 2 roof, so, after seting up installing port 221, the terminal surface that mass flow end 2 roof is close to liquid cooling board 1 has formed last step face 222, so go up step face 222 and do not need extra processing, alright automatic formation when seting up installing port 221, and after liquid cooling board 1 offsets with last step face 222, the terminal surface of liquid cooling board 1 can just with the internal surface parallel and level of mass flow end 2, the coolant liquid can unobstructed get into liquid cooling board 1, and guarantee that liquid cooling board 1 has sufficient connection area with mass flow end 2. The lower step surface 223 is formed in the same manner as the upper step surface 222.

In some embodiments, as shown in fig. 4 and 5, to facilitate the processing of current collecting tip 2, current collecting tip 2 includes a current collector 22 and a cover assembly 23, where current collector 22 is opened with a liquid inlet and outlet and a mounting port 221, and cover assembly 23 is disposed on two sides of current collector 22 and forms a current collecting chamber 21 with current collector 22.

When assembled, the cover assembly 23 covers the current collector 22 and is fixed to the current collector 22 by welding.

On the basis of the above embodiment, the cover assembly 23 includes the first cover 231 and the second cover 232, and the first cover 231 and the second cover 232 are oppositely buckled on two sides of the current collector 22. As shown in fig. 4, the side of the first cover 231 facing the current collector 22 has a first step surface 2311, and the first step surface 2311 can abut against the inner wall of the side of the current collector 22 to define the position of the first cover 231 relative to the current collector 22; one side of the second cover 232 facing the current collector 22 has a second step surface 2321, and the inner wall of the other side of the second step surface 2321 abuts to define the position of the second cover 232 relative to the current collector 22.

Specifically, the first cover 231 and the second cover 232 are symmetrically arranged with respect to the current collector 22, the shape of the first step surface 2311 is matched with the inner wall of one side of the current collector 22, and the shape of the second step surface 2321 is matched with the inner wall of the other side of the current collector 22.

A first boss is convexly disposed on one side of the first sealing cover 231 facing the current collector 22, a side surface of the first boss can be regarded as a first step surface 2311, a second boss is convexly disposed on one side of the second sealing cover 232 facing the current collector 22, and a side surface of the second boss can be regarded as a second step surface 2321.

In some embodiments, as shown in fig. 5, to facilitate connection of the current collector 22 to the water inlet and outlet pipeline, a water nozzle connector 24 is disposed on the current collector 22 and connected to the liquid inlet and outlet, and the water nozzle connector 24 is communicated with the manifold 21 through the liquid inlet and outlet.

The water nozzle connector 24 and the current collector 22 can be of an integrated structure, and the water nozzle connector 24 and the current collector 22 can also be processed independently and finally welded together.

On the basis of the above embodiment, in order to make the height of the current collecting terminal 2 smaller, as shown in fig. 5, an avoiding groove 224 for accommodating the water nozzle connector 24 is concavely arranged at one end of the current collector 22 away from the liquid cooling plate 1, and the liquid inlet and outlet are opened on the avoiding groove 224.

The one end that mass flow body 22 deviates from liquid cold drawing 1 is recessed to be set up, can dodge one section height that can install water injection well choke joint 24, and water injection well choke joint 24 installation back can not be epirelief in mass flow body 22, and liquid cold drawing's height dimension is littleer.

Specifically, above-mentioned avoiding groove 224 to be located the top that the mass flow body 22 deviates from liquid cold plate 1 one end, for making the more pleasing to the eye of mass flow body 22, the bottom that the mass flow body 22 deviates from liquid cold plate 1 one end also is concave to be equipped with a recess, and the mass flow body 22 encloses to establish and is the type of calligraphy. Correspondingly, the first cover 231 and the second cover 232 are also in a concave shape.

The structure of the liquid-cooled panel 1 will be specifically described below:

as shown in fig. 6, the inner cavity of the liquid cooling plate 1 may include one passage for passing the condensate, or may include a plurality of passages independent of each other for passing the condensate.

In at least one embodiment, the liquid cooling plate 1 may be a harmonica tube, and the material thereof may be an aluminum alloy. The unique structure of the harmonica tube can deform to a limited extent when the electric core 3 expands, and the increase of internal stress caused by the expansion is reduced, so that the attenuation of the performance and the capacity of the electric core 3 caused by the expansion of the electric core 3 is reduced.

The embodiment of the second aspect of the utility model provides a cooling device, as shown in fig. 7 and fig. 8, the utility model discloses the cooling device that the embodiment of the second aspect provided includes water intake pipe 4, outlet pipe 5 and above-mentioned liquid cooling plate subassembly, and a plurality of liquid cooling plate subassemblies are just set up side by side at the interval, and water intake pipe 4 communicates with the business turn over liquid mouth on the mass flow end 2 of each liquid cooling plate 1 one end, and outlet pipe 5 communicates with the business turn over liquid mouth on the mass flow end 2 of each liquid cooling plate 1 other end.

The water inlet pipeline 4 can discharge the cooling liquid into each liquid cooling plate assembly respectively, and the water outlet pipeline 5 can receive the cooling liquid discharged by each liquid cooling plate assembly, so that the cooling liquid can flow through each liquid cooling plate 1 fully, and the cooling effect is better.

Wherein, the material of the water inlet pipeline 4 and the water outlet pipeline 5 can be plastic nylon.

Specifically, the liquid cooling plate 1 in each liquid cooling plate assembly is used to be clamped between two adjacent rows of battery cells 3.

In some embodiments, the water inlet pipe 4 and the water outlet pipe 5 each include a plug 41 and a plurality of three-way joints 42 that are sequentially connected; a plug 41 is arranged on the three-way joint 42 at any end to realize the plugging function of one end of the water inlet pipeline 4 and one end of the water outlet pipeline 5; the tee fitting 42 at the other end may communicate with a pipe to receive or discharge coolant; and all the liquid inlet and outlet ports positioned on the same side of the liquid cooling plate 1 are communicated with all the three-way joints 42 in a one-to-one correspondence manner.

Specifically describing the water inlet pipe 4 as an example, as shown in fig. 9 and 10, a plug 41 is mounted on the three-way joint 42 at the leftmost end. The three-way joint 42 has two inlets and outlets that open in the horizontal direction and one outlet that opens in the vertical direction. The two inlets and outlets are communicated with two adjacent three-way joints 42, and the outlets are connected with the water nozzle joints 24 on the same side of the liquid cooling plate 1.

In some embodiments, as shown in fig. 10, two adjacent three-way joints 42 are connected by a hose 43, and the hose 43 can absorb displacement and deformation caused by part of assembly tolerance and expansion of the battery cell 3.

The connection between the hose 43 and the three-way joint 42 may be made by laser welding, crimping, or the like.

In at least one embodiment, the hose 43 is welded to the tee joint 42 by laser, which can increase the sealing performance of the water inlet pipe 4 and the water outlet pipe 5, and is safer to use.

Specifically, the hose may be a corrugated hose.

The embodiment of the second aspect of the utility model provides a battery pack, the utility model discloses the battery pack that the embodiment of the second aspect provided includes multirow electric core 3 and above-mentioned liquid cooling plate subassembly or cooling device, and each liquid cooling plate 1 in the liquid cooling plate subassembly is installed between two adjacent rows of electric cores 3.

When the cooling device is used, the cooling liquid is distributed to the flow collecting end 2 at one end of the liquid cooling plate 1 through the three-way joints 42 in the water inlet pipeline 4 at one side, then flows out after being converged through the inner cavity of the liquid cooling plate 1 and the flow collecting end 2 at the other end of the liquid cooling plate 1 through the three-way joints 42 on the water outlet pipeline 5. Above-mentioned cooling device is installed to above-mentioned battery package, and cooling device can effectively cool down each side of arranging electric core 3, promotes electric core 3 and fills the performance soon.

When the battery pack is assembled, the plurality of battery cells 3 are bonded with each other through the small-face adhesive on the side face to form a row of battery cells 3, the liquid cooling plate 1 is laminated with the row of battery cells 3 through the adhesive to form a battery cell liquid cooling plate module, the plurality of battery cell liquid cooling plate modules are sequentially stacked, and the adhesive on the laminating face forms a complete battery cell liquid cooling plate module. The battery case 6 can be flexibly provided with one or more modules as required. The electric core liquid cooling plate module is adhered and fixed at a corresponding position of the battery box body 6 through an adhesive, then the water inlet pipeline 4 and the water outlet pipeline 5 on two sides are respectively installed, the water inlet pipeline 4 and the water outlet pipeline 5 are inserted into the water nozzle joint 24 through the quick-connection joint at the bottom end of the three-way joint 42, and pipeline connection and sealing are achieved.

In at least one embodiment, the facet adhesive is an adhesive having a thermally conductive function.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims

1. The liquid cooling plate assembly is characterized by comprising a liquid cooling plate (1) and collecting ends (2) arranged at two ends of the liquid cooling plate (1);

the collecting end (2) is provided with a collecting cavity (21), the top of the collecting end (2) is provided with a liquid inlet and outlet communicated with the collecting cavity (21), and the end part of the collecting cavity (21) is provided with a mounting port (221);

the end part of the liquid cooling plate (1) is inserted into the mounting opening (221), the inner cavity of the liquid cooling plate (1) is communicated with the manifold (21), and the liquid cooling plate (1) is used for being mounted between two adjacent rows of electric cores (3).

2. The liquid cooling plate assembly of claim 1, wherein the top end of the mounting opening (221) is provided with an upper step surface (222) for limiting the insertion depth of the liquid cooling plate (1), and/or the bottom end of the mounting opening (221) is provided with a lower step surface (223) for limiting the insertion depth of the liquid cooling plate (1).

3. The liquid cooling plate assembly of claim 1, wherein the current collecting tip (2) comprises a current collector (22) and a cover assembly (23), the current collector (22) defines the fluid inlet and outlet and the mounting port (221), and the cover assembly (23) covers both sides of the current collector (22) and forms the current collecting cavity (21) with the current collector (22).

4. The liquid cooling plate assembly of claim 3, wherein the cover assembly (23) comprises a first cover (231) and a second cover (232), the first cover (231) and the second cover (232) are relatively snapped on both sides of the current collector (22), a side of the first cover (231) facing the current collector (22) has a first step surface (2311) defining a position of the first cover (231) relative to the current collector (22), and a side of the second cover (232) facing the current collector (22) has a second step surface (2321) defining a position of the second cover (232) relative to the current collector (22).

5. The liquid cooled plate assembly of claim 3, wherein said current collector (22) is provided with a water nozzle connector (24) connected to said inlet and outlet, said water nozzle connector (24) communicating with said manifold (21) through said inlet and outlet.

6. The liquid cooling plate assembly of claim 5, wherein an avoiding groove (224) for accommodating the water nozzle connector (24) is concavely arranged at one end of the current collector (22) departing from the liquid cooling plate (1), and the liquid inlet and outlet are arranged on the avoiding groove (224).

7. A cooling device, comprising a water inlet pipe (4), a water outlet pipe (5) and a plurality of liquid cooling plate assemblies according to any one of claims 1 to 6, wherein the liquid cooling plate assemblies are arranged side by side and at intervals, the water inlet pipe (4) is communicated with the liquid inlet and outlet on the collecting head (2) at one end of each liquid cooling plate (1), and the water outlet pipe (5) is communicated with the liquid inlet and outlet on the collecting head (2) at the other end of each liquid cooling plate (1).

8. The cooling device according to claim 7, wherein the water inlet pipeline (4) and the water outlet pipeline (5) each comprise a plug (41) and a plurality of three-way joints (42) which are sequentially communicated, the plug (41) is installed on the three-way joint (42) at any end, and the liquid inlet and outlet ports located on the same side of the liquid cooling plate (1) are communicated with the three-way joints (42) in a one-to-one correspondence manner.

9. The cooling device according to claim 8, wherein the adjacent three-way joints (42) are connected by a hose (43).

10. A battery pack, characterized by comprising a plurality of rows of cells (3) and a liquid cooling plate assembly according to any one of claims 1-6 or a cooling device according to any one of claims 7-9, each of said liquid cooling plates (1) of said liquid cooling plate assembly being mounted between two adjacent rows of said cells (3).