CN219066959U

CN219066959U - Liquid cooling flat tube and battery module

Info

Publication number: CN219066959U
Application number: CN202320025505.8U
Authority: CN
Inventors: 李德连; 胡东升; 周鹏
Original assignee: Sinoev Hefei Technologies Co Ltd
Current assignee: Sinoev Hefei Technologies Co Ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-05-23
Anticipated expiration: 2033-01-05

Abstract

The embodiment of the utility model provides a liquid cooling flat tube and a battery module, and relates to the technical field of batteries. This flat pipe of liquid cooling includes flat pipe body, water pipe head and elastic framework, is provided with the heat insulating mattress on the flat pipe body, and flat pipe body is assembled by last casing and lower casing and forms, and water pipe head installs respectively at the both ends of flat pipe body, and elastic framework installs between last casing and lower casing, and elastic framework includes skeleton framework, a plurality of first strengthening rib and second strengthening rib, and each first strengthening rib, second strengthening rib all interval slope set up and all are connected with the skeleton framework, and the top interval of each first strengthening rib is provided with a plurality of protruding ribs, each protruding rib with the last edge of skeleton framework is connected and its width is less than the width of first strengthening rib, second strengthening rib. The embodiment of the utility model improves the heat conduction efficiency between the battery cell and the liquid cooling flat tube in the battery module, and simultaneously effectively reduces the possibility of whole package out of control when the single battery cell is out of control.

Description

Liquid cooling flat tube and battery module

Technical Field

The application relates to the technical field of batteries, in particular to a liquid cooling flat tube and a battery module.

Background

The battery pack needs to be provided with a liquid cooling component to exchange heat with the battery cells in the battery pack. The traditional liquid cooling assembly is generally a liquid cooling flat tube, and the liquid cooling tube has the following defects:

first, the piping of the liquid-cooled tube is usually a metal piping, which has high strength but is in close contact with the battery cells. Therefore, insulation protection needs to be made, for example, an insulation material is added between the liquid-cooled tube and the battery cell; secondly, when the liquid cooling tube is used, in order to obtain a larger effective heat exchange area, the pipeline and the battery core of the liquid cooling tube need to be filled with heat conduction interface materials, and the insulating materials and the heat conduction interface materials added between the liquid cooling tube and the battery core weaken the heat conduction efficiency between the liquid cooling tube and the battery core to a certain extent.

Meanwhile, in order to improve the heat management efficiency and the grouping efficiency, the electric cores are closely distributed on two sides of the liquid cooling pipe, under the installation mode, if the electric core on one side of a pipeline of the liquid cooling pipe is exploded and sprayed out of control, high temperature can be rapidly transferred to the single electric core on the other side through the pipe wall of the liquid cooling pipe, and the adjacent electric core is triggered to be exploded and sprayed in a linkage mode, so that the risk of whole package thermal runaway is increased.

Disclosure of Invention

The utility model aims to provide a liquid cooling flat tube and a battery module, for example, so as to improve the heat conduction efficiency between an electric core and the liquid cooling flat tube in the battery module and effectively reduce the possibility of whole package out of control when a single electric core is out of control.

Embodiments of the utility model may be implemented as follows:

in a first aspect, an embodiment of the present utility model provides a liquid cooling flat tube, including a flat tube body, a water pipe connector and an elastic framework, where the flat tube body is provided with a heat insulation pad, the flat tube body is assembled by an upper shell and a lower shell, the upper shell and the lower shell are made of a flexible composite material, the flexible composite material includes an aluminum foil and a non-metal layer, and the water pipe connector and the elastic framework are both made of non-metal materials;

the water pipe connectors are respectively arranged at two ends of the flat pipe body, and the elastic framework is arranged between the upper shell and the lower shell;

the elastic framework comprises a framework frame body, a plurality of first reinforcing ribs and second reinforcing ribs, wherein the first reinforcing ribs and the second reinforcing ribs are obliquely arranged at equal intervals and are connected with the framework frame body, the first reinforcing ribs are arranged above the second reinforcing ribs, a plurality of convex ribs are arranged at equal intervals above the first reinforcing ribs, and the convex ribs are connected with the upper edge of the framework frame body and have widths smaller than those of the first reinforcing ribs and the second reinforcing ribs.

In an alternative embodiment, the upper housing is identical in structure to the lower housing.

In an alternative embodiment, each of the second reinforcing ribs is inclined in a direction opposite to that of each of the first reinforcing ribs, so that the first reinforcing ribs and the second reinforcing ribs integrally form a crossed structure.

In an alternative embodiment, the overall shape of the elastic framework is matched with the shape of the upper shell and the lower shell, the heat insulation pad is installed at the outer wall of the lower shell, and the shape of the heat insulation pad is matched with the shape of the lower shell;

the two ends of each first reinforcing rib and each second reinforcing rib of the elastic framework are respectively connected with the inner side wall of the framework frame body.

In an alternative embodiment, the overall shape of the elastic framework is adapted to the shapes of the upper shell and the lower shell, a plurality of mounting grooves are concavely formed in the opposite sides of the upper shell and the lower shell at equal intervals, and a plurality of hollow grooves are formed in the elastic framework at intervals;

each mounting groove of the upper shell and the lower shell corresponds to each hollow groove on the elastic framework, and each hollow groove on the elastic framework is embedded on the convex side of the mounting groove of the lower shell at the corresponding position;

one end of each first reinforcing rib and one end of each second reinforcing rib are connected with the inner side wall of the framework frame body, and the other end of each first reinforcing rib and one end of each second reinforcing rib are connected with the outer wall of the hollow groove;

the heat insulation pads are multiple, and each heat insulation pad is respectively arranged at the mounting grooves of the upper shell and the lower shell.

In an alternative embodiment, skeleton mounting grooves are concavely formed on opposite sides of the upper shell and the lower shell, and the elastic skeleton is mounted at the skeleton mounting grooves between the upper shell and the lower shell;

the two ends of each first reinforcing rib and each second reinforcing rib of the elastic framework are respectively connected with the inner side wall of the framework frame body;

the heat insulation pads are multiple, and each heat insulation pad is respectively arranged on the convex sides of the upper shell and the lower shell of the framework mounting groove and is respectively positioned on the outer edges of the convex sides of the framework mounting groove.

In an alternative embodiment, each of the water connections comprises a first connection and a second connection;

the first connector is respectively installed at two ends of the upper shell, the second connector is respectively installed at two ends of the lower shell, and the first connector and the second connector are connected through a flange plate arranged between the upper shell and the lower shell.

In an alternative embodiment, two sides of the outer wall of the first joint are respectively provided with a clamping head, and two sides of the outer wall of the second joint are provided with clamping holes matched with the clamping heads;

the outer diameter of the first joint is smaller than the outer diameter of the second joint.

In a second aspect, an embodiment of the present utility model provides a battery module, including a plurality of groups of electric cells and a plurality of liquid-cooled flat tubes as described in any one of the foregoing embodiments;

each group of the battery cells are arranged in a stacked mode, each liquid cooling flat tube is arranged on the large surface side of each group of the battery cells respectively, and water pipe connectors at two ends of each liquid cooling flat tube are clamped in sequence according to the stacking direction of the battery cells respectively.

In an alternative embodiment, the water pipe connector is provided with a clamping head on the upper shell side, the water pipe connector is provided with a clamping hole on the lower shell side, and the water pipe connector is adjacent to the clamping head of the water pipe connector in the stacking direction of the electric core through the clamping head Kong Kajie.

The beneficial effects of the embodiment of the utility model include, for example:

according to the liquid cooling flat tube and the battery module, the upper shell and the lower shell of the flexible composite material are designed, so that the whole flat tube body is provided with the insulating layer and has the characteristic of high flexibility, an insulating part is not required to be additionally arranged for protection during use, after the flat tube body is filled with a liquid cooling medium, the thin-wall shells of the upper shell and the lower shell can be uniformly and tightly attached to the surfaces of all groups of battery cells in the battery module under internal pressure, a heat conduction section material is not required to be added between the upper shell and the lower shell, and the heat conduction efficiency between the battery cells and the liquid cooling flat tube is improved.

Meanwhile, due to the design of the upper shell and the lower shell of the composite material, when a single battery cell is in thermal runaway, the temperature of the battery cell shell can reach 400-500 ℃, under the high temperature, the nonmetallic layers of the upper shell and the lower shell can be quickly melted, the flat tube body can form weak points at the positions, under the simultaneous action of internal liquid cooling mediums, the liquid cooling flat tube can be broken at the positions corresponding to the battery cell in the runaway, a large amount of liquid cooling mediums gush out of the liquid cooling mediums can directionally spray the battery cell in the runaway, the temperature is quickly reduced, further severe reaction of the battery cell is controlled, and the possibility of whole package runaway caused by the thermal runaway of the single battery cell is effectively reduced.

Further, because the battery cell can produce certain bulge at thickness direction under charge-discharge cycle, through the elasticity skeleton of design nonmetallic material, have certain compressibility when providing cavity support to whole flat tub of body, this compressible scope is realized through the protruding muscle that sets up in the first strengthening rib top of elasticity skeleton, and this protruding muscle is used for absorbing the battery cell bulge. The design provides a bulge space for the battery cell and a reasonable pretightening force, so that the battery cell has longer cycle life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a liquid-cooled flat tube according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a heat insulation pad in a liquid cooling flat tube according to an embodiment of the present utility model;

FIG. 3 is a schematic structural diagram of an elastic skeleton in a liquid-cooled flat tube according to an embodiment of the present utility model;

FIG. 4 is a second schematic diagram of an elastic skeleton in a liquid-cooled flat tube according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of the overall structure of a battery module according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of the overall structure of another liquid-cooled flat tube according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of an upper shell in another liquid-cooled flat tube according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a lower shell in another liquid-cooled flat tube according to an embodiment of the present utility model;

FIG. 9 is a schematic structural diagram of an elastic skeleton in another liquid-cooled flat tube according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram of the overall structure of a liquid-cooled flat tube according to an embodiment of the present utility model;

FIG. 11 is a schematic diagram of a heat insulation pad in a liquid cooling flat tube according to an embodiment of the present utility model;

FIG. 12 is a schematic view of a lower shell in a liquid-cooled flat tube according to an embodiment of the present utility model;

FIG. 13 is a schematic diagram of a water pipe joint in a liquid cooling flat pipe according to an embodiment of the present utility model;

fig. 14 is a schematic structural diagram of a battery module according to an embodiment of the present utility model in specific use.

Icon: 100-liquid cooling flat tube; 101-a flat tube body; 1011-an upper housing; 1012-lower housing; 102-a water pipe joint; 1021-a first joint; 1022-second linker; 1023-flange plate; 1024-clamping head; 1025-clamping holes; 103-an elastic framework; 1031-a skeletal frame; 1032—a first stiffener; 1033-a second stiffener; 1034-ribs; 104-a heat insulation pad; 105-mounting slots; 106-a hollow groove; 107-a skeleton installation groove; 200-battery module; 201-cell.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of 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.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," 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; 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 utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 5, a liquid cooling flat tube 100 is provided in an embodiment of the utility model. The liquid cooling flat tube can be applied to the battery module 200 to provide heat exchange for each group of battery cells 201 of the battery module 200, and the battery module 200 can be assembled in a battery pack (not shown in the figure), and the battery pack is usually installed in an electric vehicle such as a new energy automobile, so as to supply power to the whole vehicle.

In an embodiment of the present utility model, a liquid cooling flat tube 100 is provided, including a flat tube body 101, a water tube connector 102 and an elastic framework 103, where a heat insulation pad 104 is disposed on the flat tube body 101, the flat tube body 101 is assembled by an upper housing 1011 and a lower housing 1012, the upper housing 1011 and the lower housing 1012 are made of a flexible composite material, the flexible composite material includes an aluminum foil and a non-metal layer (not shown in the figure), and the water tube connector 102 and the elastic framework 103 are both made of non-metal materials.

The water pipe connectors 102 are respectively installed at two ends of the flat pipe body 101, and the elastic framework 103 is installed between the upper housing 1011 and the lower housing 1012.

The elastic framework 103 includes a framework frame 1031, a plurality of first reinforcing ribs 1032 and second reinforcing ribs 1033, each of the first reinforcing ribs 1032 and the second reinforcing ribs 1033 are disposed at equal intervals in an inclined manner and are connected with the framework frame 1031, each of the first reinforcing ribs 1032 is disposed above each of the second reinforcing ribs 1033, a plurality of convex ribs 1034 are disposed at equal intervals above each of the first reinforcing ribs 1032, each of the convex ribs 1034 is connected with an upper edge of the framework frame 1031, and the width of each of the convex ribs is smaller than the width of each of the first reinforcing ribs 1032 and the second reinforcing ribs 1033.

As shown in fig. 5, for example, each of the liquid cooling flat tubes 100 may be disposed between each group of the electric cells 201, each of the liquid cooling flat tubes 100 may be connected through each of the water pipe joints 102, and each of the electric cells 201 may exchange heat by a cooling medium injected from the water pipe joint 102 at the liquid cooling flat tube 100.

Wherein, the inner space that upper casing 1011 and lower casing 1012 that sets up assembled is used for storing the liquid cooling medium, and the first strengthening rib 1032 and the second strengthening rib 1033 that slope set up in the elasticity skeleton 103 are used for supporting flat tub of body 101, and protruding muscle 1034 that sets up in the elasticity skeleton 103 are used for absorbing the bulge that produces in the electric core 201 course of working.

Further, the heat insulation pad 104 is configured to insulate high temperature, the heat insulation pad 104 may be, for example, an aerogel pad or other heat insulation material, the heat insulation pad 104 may be disposed inside the flat tube body 101, on two sides of the surface of the flat tube body 101, in the middle of the surface of the flat tube body 101, or on one side of the surface of the flat tube body 101, and the heat insulation pad 104 is further configured to block heat from propagating to the cell 201 opposite to the liquid cooling flat tube 100 after the cell 201 is out of control.

In the embodiment of the present utility model, since the upper housing 1011 and the lower housing 1012 are made of a flexible composite material, the flexible composite material includes an aluminum foil and a non-metal layer, so that the whole flat tube body 101 is provided with an insulating layer and has the characteristic of high flexibility, and the flexible composite material may be, for example, an aluminum plastic film or other flexible composite materials.

When the liquid cooling flat tube 100 is used, the liquid cooling flat tube 100 can be installed between each group of electric cores 201 and is connected through the water pipe joint 102 of each liquid cooling flat tube 100, the whole liquid cooling flat tube 100 is protected without additionally adding an insulating part, after the liquid cooling medium is filled in the flat tube body 101 through the water pipe joint 102, under internal pressure, the thin-wall shells of the upper shell 1011 and the lower shell 1012 can be uniformly and tightly attached to the surfaces of each group of electric cores 201, a heat conduction section material is not required to be added between the upper shell 1011 and the lower shell 1012, and the heat conduction efficiency between the electric cores 201 and the liquid cooling flat tube 100 is improved.

Meanwhile, due to the design of the upper housing 1011 and the lower housing 1012 of the composite material, the temperature of the housing of the battery cell 201 may be as high as 400-500 ℃ when the single battery cell 201 is thermally out of control. At this high temperature, the nonmetallic layer of upper housing 1011 and lower housing 1012 will melt rapidly, and flat tube body 101 will form a weak point here, and under the simultaneous effect of the internal liquid cooling medium, this liquid cooling flat tube 100 will burst in the corresponding position of the out-of-control electric core 201, and a large amount of liquid cooling medium will spray the out-of-control electric core 201 in a directed manner, cool down rapidly, control the further violent reaction of electric core 201, reduce the possibility that leads to whole package out-of-control when single electric core 201 is out of control thermally effectively.

In the embodiment of the present utility model, since the battery cell 201 generates a certain bulge in the thickness direction under the charge-discharge cycle, by designing the elastic framework 103 of the nonmetallic material, the whole flat tube body 101 is provided with a certain compressibility while cavity supporting, and the convex rib 1034 is used for absorbing the bulge of the battery cell 201.

Further, the structure that the first reinforcing ribs 1032 are disposed above the second reinforcing ribs 1033 and the plurality of protruding ribs 1034 are disposed above the first reinforcing ribs 1032 at intervals increases the swelling space of the cell 201, and the narrow protruding ribs 1034 are easier to compress because the width of the protruding ribs 1034 is smaller than the widths of the first reinforcing ribs 1032 and the second reinforcing ribs 1033. The above design provides a reasonable pre-tightening force while providing a bulge space for the cell 201, resulting in a longer cycle life for the cell 201.

In an alternative embodiment, the upper housing 1011 is identical in structure to the lower housing 1012.

In the embodiment of the present utility model, when the liquid cooling flat tube 100 is specifically used, the structures of the upper housing 1011 and the lower housing 1012 can be designed according to the overall shape of the battery cell 201 group, so that the upper housing 1011 and the lower housing 1012 can be better attached to the battery cell 201 group for installation.

Referring to fig. 3 and 4 in combination, in an alternative embodiment, each of the second ribs 1033 is inclined opposite to each of the first ribs 1032, so that the first ribs 1032 and the second ribs 1033 integrally form a crossed structure.

In the embodiment of the present utility model, the first reinforcing ribs 1032 and the second reinforcing ribs 1033 are integrally designed to have a crossed structure, so that the flow resistance of the liquid cooling medium in the flat tube body 101 is reduced while the flat tube body 101 is supported.

Referring to fig. 2 to 5 in combination, in an alternative embodiment, the overall shape of the elastic framework 103 is adapted to the shape of the upper and

lower housings

1011 and 1012, and the heat insulation pad 104 is installed at the outer wall of the lower housing 1012 and has a shape adapted to the shape of the lower housing 1012.

Both ends of each first reinforcing rib 1032 and each second reinforcing rib 1033 of the elastic framework 103 are respectively connected to the inner side wall of the framework frame 1031.

In an embodiment of the present utility model, the heat insulation pad 104 may be disposed at one side of the surface of the flat tube body 101, and thus the heat insulation pad 104 may be disposed at the outer wall of the lower case 1012. At this time, the overall shape of the heat insulation pad 104 will be adapted to the entire liquid cooling flat tube 100, so that the heat insulation pad 104 can cover the surface of each cell 201 where the heat insulation pad 104 contacts each group of cells 201, and when the single cell 201 is out of control, the heat insulation pad 104 can block heat from propagating to the cell 201 opposite to the liquid cooling flat tube 100.

Referring to fig. 5 and fig. 6 to fig. 9 in combination, in an alternative embodiment, the overall shape of the elastic framework 103 is adapted to the shapes of the upper housing 1011 and the lower housing 1012, a plurality of mounting grooves 105 are concavely formed on opposite sides of the upper housing 1011 and the lower housing 1012, and a plurality of hollow grooves 106 are formed on the elastic framework 103 at intervals.

Each of the mounting grooves 105 of the upper case 1011 and the lower case 1012 corresponds to the position of each of the hollow grooves 106 of the elastic frame 103, and each of the hollow grooves 106 of the elastic frame 103 is fitted in the convex side of the mounting groove 105 of the lower case 1012 at the corresponding position.

One end of each of the first reinforcing ribs 1032 and each of the second reinforcing ribs 1033 is connected to the inner wall of the skeleton frame 1031, and the other end is connected to the outer wall of the hollow groove 106.

The number of the heat insulating mats 104 is plural, and each heat insulating mat 104 is mounted in the mounting groove 105 of the upper case 1011 and the lower case 1012.

In the embodiment of the present utility model, the heat insulation pad 104 may also be disposed in the middle of the surface of the flat tube body 101, so that the upper housing 1011 and the lower housing 1012 of the flat tube body 101 may be provided with a plurality of mounting slots 105 for mounting the heat insulation pad 104, so that each heat insulation pad 104 may correspondingly cover the surface of each cell 201 where the heat insulation pad 104 contacts each group of cells 201, and when the single cell 201 is thermally out of control, the heat insulation pad 104 may block heat from propagating to the cell 201 opposite to the liquid cooling flat tube 100.

Further, since the lower case 1012 is provided with a plurality of installation grooves 105 for installing the heat insulation pad 104, in order to adapt the structure of the elastic frame 103 to the structure of the flat tube body 101, the installation space is effectively utilized. Therefore, the middle portion of the elastic frame 103 is designed in a structure of a hollow groove 106 so as to be fitted with the convex side of the mounting groove 105 of the lower housing 1012.

Referring to fig. 4, 5, and 10 to 12, in an alternative embodiment, opposite sides of the upper housing 1011 and the lower housing 1012 are each concavely provided with a frame mounting groove 107, and the elastic frame 103 is mounted at the frame mounting groove 107 between the upper housing 1011 and the lower housing 1012.

The heat insulation pads 104 are plural, and each heat insulation pad 104 is mounted on the convex side of the frame mounting groove 107 of the upper housing 1011 and the lower housing 1012, and is located on the outer edge of the convex side of the frame mounting groove 107.

In the embodiment of the present utility model, the heat insulation pads 104 may also be disposed on two sides of the surface of the flat tube body 101, so that the heat insulation pads 104 may be disposed on the outer edges of the flat tube body 101, so that each heat insulation pad 104 may cover the surface of each cell 201 of the heat insulation pad 104 that contacts each group of cells 201 correspondingly, and when the single cell 201 is out of control, the heat insulation pad 104 may block heat from propagating to the cell 201 opposite to the liquid cooling flat tube 100.

Further, since the heat insulation pads 104 are respectively disposed at the outer edges of the flat tube body 101, in order to adapt the structure of the elastic framework 103 to the structure of the flat tube body 101, the installation space is effectively utilized. Accordingly, the frame mounting grooves 107 are concavely provided at opposite sides of the upper case 1011 and the lower case 1012 so that the elastic frame 103 is mounted at the frame mounting grooves 107.

Referring to fig. 13, in an alternative embodiment, each of the water connectors 102 includes a first connector 1021 and a second connector 1022.

The first joints 1021 are respectively installed at both ends of the upper housing 1011, the second joints 1022 are respectively installed at both ends of the lower housing 1012, and the first joints 1021 and the second joints 1022 are connected by a flange 1023 provided between the upper housing 1011 and the lower housing 1012.

In the embodiment of the present utility model, the water pipe joint 102 is configured to be the first joint 1021 and the second joint 1022, so that the disassembly and assembly are more convenient, and the flange 1023 is configured to communicate the first joint 1021 and the second joint 1022. In use, the connection mode of the flange 1023 and the first joint 1021 and the second joint 1022 may be fixed welding or detachable connection, which is not limited in the present utility model.

Referring to fig. 5 and 13 in combination, in an alternative embodiment, two sides of the outer wall of the first connector 1021 are respectively provided with a chuck 1024, and two sides of the outer wall of the second connector 1022 are provided with chuck holes 1025 adapted to the chuck 1024.

The first joint 1021 has an outer diameter that is smaller than the outer diameter of the second joint 1022.

In the embodiment of the present utility model, the clamping head 1024 disposed at the first connector 1021 and the clamping hole 1025 disposed at the second connector 1022 are used to clamp the clamping head 1024 of the upper liquid-cooled flat tube 100 with the clamping hole 1025 of the lower liquid-cooled flat tube 100 when a plurality of liquid-cooled flat tubes 100 are used, so as to realize the connection of the liquid-cooled flat tubes 100 mounted between each group of electric cells 201.

Referring to fig. 5 and 13 in combination, the embodiment of the utility model further provides a battery module 200, and the battery module 200 may be assembled in a battery pack (not shown) that may be built in an electric vehicle for supplying power to the whole vehicle.

In an embodiment of the present utility model, the battery module 200 includes a plurality of groups of battery cells 201 and a plurality of liquid cooling flat tubes 100 according to any of the foregoing embodiments.

Each group of battery cells 201 are stacked, each liquid cooling flat tube 100 is respectively arranged on the large surface side of each group of battery cells 201, so as to be used for regulating and controlling the temperature of each group of battery cells 201 in the battery module 200, and the water pipe connectors 102 at two ends of each liquid cooling flat tube 100 are respectively clamped in sequence according to the stacking direction of the battery cells 201.

The liquid cooling flat pipe 100 comprises a flat pipe body 101, a water pipe joint 102 and an elastic framework 103, wherein at least one heat insulation pad 104 is arranged on the flat pipe body 101, the flat pipe body 101 is formed by assembling an upper shell 1011 and a lower shell 1012, the upper shell 1011 and the lower shell 1012 are made of flexible composite materials, the flexible composite materials comprise aluminum foils and nonmetal layers, and the water pipe joint 102 and the elastic framework 103 are made of nonmetal materials.

Referring to fig. 5 and 13 in combination, in an alternative embodiment, a chuck 1024 is disposed on the side of the upper housing 1011 of the water pipe connector 102, a clamping hole 1025 is disposed on the side of the lower housing 1012 of the water pipe connector 102, and the water pipe connector 102 is clamped at the position adjacent to the chuck 1024 of the water pipe connector 102 in the stacking direction of the electric core 201 through the clamping hole 1025.

The following specific use of the liquid-cooled flat tube 100 in the embodiment of the present utility model is illustrated in the following way in conjunction with the above description:

as shown in fig. 14, the liquid cooling flat tube 100 may be disposed between each group of electric cores 201, and each group of electric cores 201 may be properly extruded during grouping, so as to ensure that the liquid cooling flat tube 100 has proper compression in the thickness direction thereof, and a uniform and tight bonding surface is obtained between the liquid cooling flat tube 100 and each group of electric cores 201 after a cooling medium (for example, a cooling liquid) is injected into an external pipeline connected through the water pipe joint 102, thereby realizing high-efficiency heat transfer between the liquid cooling flat tube 100 and each group of electric cores 201.

Under the charge-discharge cycle of each group of electric cores 201, certain bulge can be generated in the thickness direction (the direction of the cyclic bulge can be shown by an arrow in fig. 14), and the nonmetal elastic framework 103 in the liquid cooling flat tube 100 provides reasonable pretightening force while providing bulge space for the electric cores 201, so that the electric cores 201 have longer cycle life due to the reasonable pretightening force.

Further, if the cells 201 in the middle position of each group of cells 201 are out of control, the designed heat insulation pad 104 can play a good role in heat insulation so as to ensure that high temperature does not propagate to the cells 201 on both sides in a large quantity, thereby preventing the possibility of further heat diffusion.

Meanwhile, the non-metal layer of the liquid cooling flat tube 100 closely attached to the uncontrolled battery cell 201 can be softened and melted by the high temperature of the uncontrolled battery cell 201, the corresponding position of the uncontrolled battery cell 201 becomes a weak area (for example, the area in the virtual coil shown in fig. 14), under the condition of the internal pressure of the liquid cooling flat tube 100, a burst opening can be generated in the area, a large amount of cooling medium can leak, the uncontrolled battery cell 201 can be rapidly cooled, and the possibility of whole package out of control caused by burst is greatly reduced.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. The liquid cooling flat pipe is characterized by comprising a flat pipe body (101), a water pipe joint (102) and an elastic framework (103), wherein a heat insulation pad (104) is arranged on the flat pipe body (101), the flat pipe body (101) is formed by assembling an upper shell (1011) and a lower shell (1012), the upper shell (1011) and the lower shell (1012) are made of flexible composite materials, the flexible composite materials comprise aluminum foils and nonmetal layers, and the water pipe joint (102) and the elastic framework (103) are made of nonmetal materials;

the water pipe connectors (102) are respectively arranged at two ends of the flat pipe body (101), and the elastic framework (103) is arranged between the upper shell (1011) and the lower shell (1012);

the elastic framework (103) comprises a framework frame body (1031), a plurality of first reinforcing ribs (1032) and second reinforcing ribs (1033), wherein the first reinforcing ribs (1032) and the second reinforcing ribs (1033) are obliquely arranged at equal intervals and are connected with the framework frame body (1031), the first reinforcing ribs (1032) are arranged above the second reinforcing ribs (1033), a plurality of convex ribs (1034) are arranged at equal intervals above the first reinforcing ribs (1032), and the convex ribs (1034) are connected with the upper edge of the framework frame body (1031) and have widths smaller than those of the first reinforcing ribs (1032) and the second reinforcing ribs (1033).

2. The liquid cooled flat tube according to claim 1, wherein the upper housing (1011) is identical in structure to the lower housing (1012).

3. The liquid-cooled flat tube according to claim 2, wherein each of the second ribs (1033) is inclined in a direction opposite to each of the first ribs (1032) such that the first ribs (1032) and the second ribs (1033) are integrally formed in a crossing structure.

4. The liquid-cooled flat tube according to claim 3, wherein the elastic skeleton (103) has an overall shape that is adapted to the shape of the upper case (1011) and the lower case (1012), and the heat insulating pad (104) is mounted at the outer wall of the lower case (1012) and has a shape that is adapted to the shape of the lower case (1012);

both ends of each first reinforcing rib (1032) and each second reinforcing rib (1033) of the elastic framework (103) are respectively connected with the inner side wall of the framework frame body (1031).

5. The liquid cooling flat tube according to claim 3, wherein the overall shape of the elastic framework (103) is adapted to the shape of the upper shell (1011) and the lower shell (1012), a plurality of mounting grooves (105) are concavely arranged on the opposite sides of the upper shell (1011) and the lower shell (1012) at equal intervals, and a plurality of hollow grooves (106) are arranged on the elastic framework (103) at intervals;

each mounting groove (105) of the upper housing (1011) and the lower housing (1012) corresponds to the position of each hollow groove (106) on the elastic skeleton (103), and each hollow groove (106) on the elastic skeleton (103) is embedded on the convex side of the mounting groove (105) of the lower housing (1012) at the corresponding position;

one end of each first reinforcing rib (1032) and one end of each second reinforcing rib (1033) are connected with the inner side wall of the framework (1031), and the other end is connected with the outer wall of the hollow groove (106);

the number of the heat insulation pads (104) is plural, and each heat insulation pad (104) is respectively installed at the installation grooves (105) of the upper shell (1011) and the lower shell (1012).

6. The liquid cooling flat tube according to claim 3, wherein skeleton mounting grooves (107) are concavely formed on opposite sides of the upper shell (1011) and the lower shell (1012), and the elastic skeleton (103) is mounted at the skeleton mounting grooves (107) between the upper shell (1011) and the lower shell (1012);

both ends of each first reinforcing rib (1032) and each second reinforcing rib (1033) of the elastic framework (103) are respectively connected with the inner side wall of the framework frame body (1031);

the heat insulation pads (104) are multiple, and each heat insulation pad (104) is respectively installed on the convex side of the framework installation groove (107) of the upper shell (1011) and the lower shell (1012), and is respectively located on the outer edge of the convex side of the framework installation groove (107).

7. The liquid cooled flat tube of claim 1, wherein each of the water connections (102) comprises a first connection (1021) and a second connection (1022);

the first connector is respectively installed at two ends of the upper shell, the second connector is respectively installed at two ends of the lower shell, the first connector and the second connector are connected through flanges arranged between the upper shell and the lower shell, the first connector (1021) is respectively installed at two ends of the upper shell (1011), the second connector (1022) is respectively installed at two ends of the lower shell (1012), and the first connector (1021) and the second connector (1022) are connected through flanges (1023) arranged between the upper shell (1011) and the lower shell (1012).

8. The liquid-cooled flat tube according to claim 7, wherein two sides of the outer wall of the first joint (1021) are respectively provided with a clamping head (1024), and two sides of the outer wall of the second joint (1022) are provided with clamping holes (1025) adapted to the clamping heads (1024);

the first joint (1021) has an outer diameter that is smaller than an outer diameter of the second joint (1022).

9. A battery module comprising a plurality of groups of cells (201) and a plurality of liquid cooled flat tubes according to any one of claims 1-8;

each group of electric cores (201) are arranged in a stacked mode, each liquid cooling flat tube is arranged on the large surface side of each group of electric cores (201), and water pipe connectors (102) at two ends of each liquid cooling flat tube are sequentially clamped in the stacking direction of the electric cores (201).

10. The battery module according to claim 9, wherein the water pipe connector (102) is provided with a chuck (1024) on the upper housing (1011) side, the water pipe connector (102) is provided with a clamping hole (1025) on the lower housing (1012) side, and the water pipe connector (102) is clamped at the chuck (1024) adjacent to the water pipe connector (102) in the stacking direction of the battery cell (201) through the clamping hole (1025).