CN221057503U

CN221057503U - Spliced liquid cooling flat tube and battery module

Info

Publication number: CN221057503U
Application number: CN202321578781.3U
Authority: CN
Inventors: 李义德; 孟智强; 赵向阳
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2024-05-31
Anticipated expiration: 2033-06-20

Abstract

The application relates to the technical field of lithium ion batteries, in particular to a spliced liquid cooling flat tube and a battery module. The flat pipe of concatenation liquid cooling includes a plurality of flat pipe units, every the inside of flat pipe unit is provided with the cavity that supplies the coolant liquid to flow through, every the both ends of flat pipe unit all are provided with the opening, the opening with the cavity intercommunication, every the both ends of flat pipe unit can with two other flat pipe units concatenation, when a plurality of flat pipe unit concatenation, a plurality of flat pipe unit includes a plurality of the cavity intercommunication each other. According to the spliced liquid cooling flat tube and the battery module, the problems that the existing serpentine flat tube is high in cost, complex in processing process and poor in universality are solved.

Description

Spliced liquid cooling flat tube and battery module

Technical Field

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

Background

The battery module generally needs to be composed of a certain number of single batteries in a serial connection, parallel connection or a serial-parallel connection combination mode, so that the required voltage and energy requirements can be met. Because the battery can all produce heat in the charge-discharge use, if the heat can not distribute in good time, cause inhomogeneous heat gathering, can influence the life of battery, when serious, can take place thermal runaway, arouse potential safety problem.

In this way, the battery module needs to be cooled, and the current cooling mode of the cylindrical battery cell group generally adopts a serpentine flat tube to cool the large surface.

The conventional manufacturing process of the snake-shaped flat tube at present usually comprises the steps of extruding the harmonica tube, and then shaping the harmonica tube at high temperature and high pressure. However, in the above process, the cost of the harmonica tube is high, the subsequent processing process is complex, and the universality of the conventional serpentine flat tube is poor.

Disclosure of utility model

The application aims to provide a spliced liquid cooling flat tube and a battery module, so that the problems of higher cost, complex processing process and poor universality of the traditional serpentine flat tube are solved.

According to a first aspect of the present application, there is provided a spliced liquid-cooled flat tube, the spliced liquid-cooled flat tube comprising a plurality of flat tube units, wherein a cavity through which a cooling liquid flows is provided inside each flat tube unit, openings are provided at both ends of each flat tube unit, the openings are communicated with the cavities, both ends of each flat tube unit can be spliced with two other flat tube units, and when the flat tube units are spliced, the cavities included in the flat tube units are communicated with each other;

The flat pipe units can be spliced in sequence along the same direction to form a spliced liquid cooling flat pipe; the flat pipe of concatenation liquid cooling still includes two seal covers, is a plurality of flat pipe unit is followed same orientation when the flat pipe of concatenation becomes the flat pipe of concatenation liquid cooling, two the seal cover is located respectively the both ends of the flat pipe of concatenation liquid cooling, two the seal cover is provided with feed liquor pipe and drain pipe respectively.

In any of the above technical solutions, further, the openings are correspondingly disposed on end surfaces of the flat tube units, and when the flat tube units are spliced, two end surfaces of each flat tube unit can be abutted with end surfaces of another two flat tube units.

In any of the above technical solutions, further, each flat tube unit includes two liquid cooling walls opposite to each other, and two connecting walls opposite to each other, where the surface area of the liquid cooling walls is greater than the surface area of the connecting walls, and the two liquid cooling walls and the two connecting walls enclose the cavity together.

In any of the above technical solutions, further, each flat tube unit further includes two positioning portions, the two positioning portions are respectively connected with the two connecting walls, a portion of each positioning portion is located in the cavity, another portion of each positioning portion is located outside the cavity, and the another portion of each positioning portion can be spliced with another flat tube unit.

In any of the above technical solutions, further, each flat tube unit is an arc flat tube or a wave flat tube.

In any of the above technical solutions, further, each flat tube unit includes a concave flat tube and two convex flat tubes connected to two ends of the concave flat tube, the thickness of the concave flat tube is the same as that of the convex flat tube, when a plurality of flat tube units are spliced, the convex flat tube included in each flat tube unit can form an integral convex flat tube together with the convex flat tube included in another flat tube unit, and the radian of the integral convex flat tube is the same as that of the concave flat tube.

In any of the above embodiments, further, each of the flat tube units is formed by extrusion or die casting.

According to a second aspect of the application, a battery module is provided, comprising the spliced liquid cooling flat tube.

In any of the above technical solutions, further, the battery module further includes a plurality of battery cell groups, each battery cell group includes a plurality of battery cells arranged along the same direction, and the spliced liquid cooling flat tube is sandwiched between two adjacent battery cell groups.

According to the spliced liquid cooling flat tube, the spliced liquid cooling flat tube comprises a plurality of identical flat tube units, wherein cavities for cooling liquid to flow through are formed in each flat tube unit, openings are formed in two ends of each flat tube unit and are communicated with the cavities, two ends of each flat tube unit can be spliced with other two flat tube units, and when the flat tube units are spliced, the cavities of the flat tube units are communicated with each other.

When the cooling device is specifically used, the ends of the flat pipe units are spliced, the spliced whole liquid cooling flat pipe is connected with the surface of the core group, and finally the liquid inlet pipe and the liquid outlet pipe are arranged at the openings at the two ends of the whole spliced liquid cooling flat pipe, so that the circulation of cooling liquid is realized.

The spliced liquid cooling flat tube is formed by splicing a plurality of identical flat tube units, the number of the flat tube units can be determined according to the number of series-parallel electric cores, and the spliced liquid cooling flat tube has good universality.

And each flat pipe unit can be manufactured by only one die. Compared with the prior art, the harmonica tube is not required to be purchased, extruded and shaped. Compared with the prior art, the flat pipe unit has the advantages of low material cost, simple and convenient processing and reduced development cost of the die.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 application 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 shows a schematic view of a splice of a plurality of flat tube units according to an embodiment of the application;

Fig. 2 shows a schematic structural view of a flat tube unit according to an embodiment of the present application;

FIG. 3 shows a schematic structural view of the other view of FIG. 2;

FIG. 4 shows a schematic splice of three flat tube units according to an embodiment of the application;

FIG. 5 shows a schematic diagram of a splice of seven flat tube units according to an embodiment of the application;

FIG. 6 shows a schematic structural diagram of a spliced liquid cooling flat tube after a sealing sleeve is installed;

Fig. 7 shows a schematic structural diagram of a plurality of battery cell groups after being mounted with a spliced liquid-cooled flat tube.

Icon: 10-splicing the liquid cooling flat tube; 100-flat tube units; 101-liquid cooling wall; 102-connecting walls; 103-concave flat tube; 104-convex flat tube; 105-positioning part; 200-sealing sleeve; 201-a liquid inlet pipe; 202-a liquid outlet pipe; 300-cell group; 400-box body.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but rather, obvious variations may be made upon an understanding of the present disclosure, other than operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided solely to illustrate some of the many possible ways of implementing the methods, devices, and/or systems described herein that will be apparent after understanding the present disclosure.

In the entire specification, when an element (such as a layer, region or substrate) is described as being "on", "connected to", "bonded to", "over" or "covering" another element, it may be directly "on", "connected to", "bonded to", "over" or "covering" another element or there may be one or more other elements interposed therebetween. In contrast, when an element is referred to as being "directly on," directly connected to, "or" directly coupled to, "another element, directly on," or "directly covering" the other element, there may be no other element intervening therebetween.

As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more.

Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in examples described herein could also be termed a second member, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatially relative terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to another element would then be oriented "below" or "lower" relative to the other element. Thus, the term "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof.

Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent upon an understanding of the present disclosure. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the present disclosure.

The first aspect of the application provides a spliced liquid cooling flat pipe, so that the problems of high cost, complex processing process and poor universality of the existing serpentine flat pipe are solved.

According to the spliced liquid-cooled flat tube disclosed by the application, as shown in fig. 1 to 7, the spliced liquid-cooled flat tube comprises a plurality of identical flat tube units, wherein a cavity (the cooling liquid can be water) for cooling liquid to flow through is arranged in each flat tube unit 100, openings are formed in two ends of each flat tube unit 100 and are communicated with the cavity, two ends of each flat tube unit 100 can be spliced with other two flat tube units 100, and when the flat tube units 100 are spliced, the cavities of the flat tube units 100 are mutually communicated.

When the liquid cooling flat tube unit is specifically used, the ends of the flat tube units 100 are spliced firstly, then the spliced integral liquid cooling flat tube 10 contacts the surface of the battery cell group 300, and finally the liquid inlet tube 201 and the liquid outlet tube 202 are arranged at the openings at the two ends of the integral liquid cooling flat tube 10, so that the circulation of cooling liquid is realized.

The spliced liquid cooling flat tube is formed by splicing a plurality of identical flat tube units 100, the number of the flat tube units 100 can be determined according to the number of series-parallel electric cores, and the spliced liquid cooling flat tube has good universality.

And each flat tube unit 100 can be manufactured by only one mold (here, each flat tube unit 100 may be formed by extrusion or die casting). Compared with the prior art, the harmonica tube is not required to be purchased, extruded and shaped. Compared with the prior art, the flat pipe unit has the advantages of low material cost, simple and convenient processing and reduced development cost of the die. The specific structure of the flat tube unit and the splicing process will be described in detail below.

In the embodiment of the present application, as shown in fig. 2 and 3, each flat tube unit 100 includes two liquid cooling walls 101 (the liquid cooling walls 101 are used for contacting the battery cell group 300) opposite to each other, and two connecting walls 102 opposite to each other, wherein the surface area of the liquid cooling walls 101 is larger than that of the connecting walls 102, and the two liquid cooling walls 101 and the two connecting walls 102 together enclose a cavity (here, the cavity may be a complete cavity, or a cavity similar to a harmonica tube, i.e., a plurality of bar ribs are disposed in the complete cavity to divide the cavity into a plurality of bar cavities).

Preferably, the openings provided at two ends of each flat tube unit 100 are respectively and correspondingly disposed on the end surfaces of the flat tube units 100, and when a plurality of flat tube units 100 are spliced, two end surfaces of each flat tube unit 100 can be abutted with the end surfaces of two other flat tube units 100. Here, the end face and the end face may be welded or adhered.

Further, as shown in fig. 2 and 3, in order to ensure the stability of the butt joint of the flat tube units 100, each flat tube unit 100 may further include two positioning portions 105, where the two positioning portions 105 are respectively connected to the two connecting walls 102, a portion of each positioning portion 105 is located in the cavity, another portion of each positioning portion 105 is located outside the cavity, and another portion of each positioning portion 105 can be plugged with another flat tube unit 100.

Preferably, the connecting wall 102 may be an arc-shaped wall, the positioning portion 105 may be a semicircular positioning column, a first end of the positioning portion 105 is located in the cavity, and the other end of the positioning portion 105 is located outside the cavity, and when the flat tube units 100 are spliced, the other end of the positioning portion 105 can be inserted into the cavity of another flat tube unit 100 to achieve positioning of the two.

In an embodiment of the present application, as shown in fig. 1 to 6, each flat tube unit 100 may be an arc-shaped flat tube. The radian of each arc flat tube can be set according to the radian of the cylindrical battery cell so as to improve the contact area of the arc flat tube and the cylindrical battery cell and further increase the heat dissipation.

Specifically, as shown in fig. 2, 3 and 4, each flat tube unit 100 includes a concave flat tube 103 and two convex flat tubes 104 connected to two ends of the concave flat tube 103 (it should be noted here that, the concave flat tube 103 and the convex flat tube are just opposite, the concave flat tube may be a convex flat tube when viewed from another angle, and the convex flat tube may be a concave flat tube when viewed from another angle), where the concave flat tube 103 and the convex flat tube 104 have the same thickness (the thickness may be 3-5mm, and the length of the flat tube unit 100 may be 20-400 mm), and when the flat tube units 100 are spliced, the convex flat tube 104 included in each flat tube unit 100 and the convex flat tube 104 included in another flat tube unit 100 together form a whole convex flat tube 104, and the radian of the whole convex flat tube 104 and the concave flat tube 103 may be the same, that is, the whole spliced liquid cooling flat tube 10 is formed into a uniform wave flat tube after the splicing.

The purpose is to make the two liquid cooling walls 101 of the spliced integral spliced liquid cooling flat tube 10 well contact the two cell groups 300 (i.e. the alternating concave-convex surfaces can well contact the two cell groups 300, as shown in fig. 7).

As shown in fig. 7, the second aspect of the present application provides a battery module, which includes the spliced liquid-cooled flat tube as described above.

Further, the battery module further comprises a plurality of battery cell groups 300 and a box 400, each battery cell group 300 comprises a plurality of battery cells arranged along the same direction, and a spliced liquid cooling flat tube 10 is clamped between two adjacent battery cell groups 300. The plurality of battery cell groups 300 and the plurality of spliced liquid cooling flat tubes 10 are all arranged in the box 400.

The spliced liquid cooling flat pipe provided by the application is specifically used as follows:

Firstly, splicing ends of a plurality of flat pipe units 100;

Then installing sealing sleeves 200 at two ends of the spliced integral spliced liquid cooling flat tube 10, wherein the two sealing sleeves 200 are respectively provided with a liquid inlet tube 201 and a liquid outlet tube 202;

Then the integral spliced liquid cooling flat tube 10 contacts the surface of the battery cell group 300;

finally, the liquid inlet pipe 201 and the liquid outlet pipe 202 are used for discharging liquid so as to realize circulation of cooling liquid.

And each flat tube unit can be manufactured by only one die (here, each flat tube unit may be formed by extrusion or die casting). Compared with the prior art, the harmonica tube is not required to be purchased, extruded and shaped. Compared with the prior art, the flat pipe unit has the advantages of low material cost, simple and convenient processing and reduced development cost of the die.

Finally, it should be noted that: the above examples are only specific embodiments of the present application, and are not intended to limit the scope of the present application, but it should be understood by those skilled in the art that the present application is not limited thereto, and that the present application is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims

1. A spliced liquid cooling flat tube is characterized in that the spliced liquid cooling flat tube comprises a plurality of flat tube units,

A cavity through which cooling liquid flows is arranged in each flat tube unit,

Openings are arranged at the two ends of each flat pipe unit, the openings are communicated with the cavity,

Two ends of each flat pipe unit can be spliced with the other two flat pipe units,

When the flat pipe units are spliced, the cavities included in the flat pipe units are communicated with each other;

The flat pipe units can be spliced in sequence along the same direction to form a spliced liquid cooling flat pipe;

the spliced liquid cooling flat tube also comprises two sealing sleeves,

When the flat pipe units are spliced into the spliced liquid cooling flat pipe along the same direction,

The two sealing sleeves are respectively sleeved at the two ends of the spliced liquid cooling flat tube,

The two sealing sleeves are respectively provided with a liquid inlet pipe and a liquid outlet pipe.

2. The spliced liquid cooling flat tube according to claim 1, wherein the openings are correspondingly arranged on the end face of the flat tube unit,

When a plurality of the flat pipe units are spliced,

Two end faces of each flat pipe unit can be in butt joint with the end faces of the other two flat pipe units.

3. The splice liquid cooled flat tube of claim 1 wherein each of the flat tube units comprises two liquid cooled walls opposite each other and two connecting walls opposite each other, wherein the liquid cooled walls have a surface area greater than the surface area of the connecting walls,

The two liquid cooling walls and the two connecting walls enclose the cavity together.

4. The liquid-cooled flat tube according to claim 3, wherein each flat tube unit further comprises two positioning portions,

The two positioning parts are respectively connected with the two connecting walls, part of each positioning part is positioned in the cavity, the other part of each positioning part is positioned outside the cavity,

The other part of the positioning part can be spliced with the other flat pipe unit.

5. The spliced liquid cooled flat tube of claim 1, wherein each flat tube unit is an arcuate flat tube or a wavy flat tube.

6. The liquid cooling flat tube according to claim 5, wherein each flat tube unit comprises a concave flat tube and two convex flat tubes connected to two ends of the concave flat tube,

The thickness of the concave flat tube is the same as that of the convex flat tube,

When a plurality of the flat pipe units are spliced,

The convex flat tube included in each flat tube unit can form an integral convex flat tube together with the convex flat tube included in the other flat tube unit,

The radian of the integral convex flat tube is the same as that of the concave flat tube.

7. The spliced liquid cooled flat tube of claim 1, wherein each of the flat tube units is formed by extrusion or die casting.

8. A battery module comprising the splice liquid cooled flat tube of any one of claims 1-7.

9. The battery module of claim 8, wherein the battery module further comprises a plurality of cell stacks,

Each cell group comprises a plurality of cells arranged along the same direction,

And the spliced liquid cooling flat tubes are clamped between two adjacent cell groups.