CN218788422U

CN218788422U - Battery pack

Info

Publication number: CN218788422U
Application number: CN202223236926.XU
Authority: CN
Inventors: 李芹; 范光辉
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-04-04
Anticipated expiration: 2032-12-01

Abstract

The application discloses battery package relates to power battery technical field. The battery pack includes a case and a battery module. The shell is provided with an air inlet and an air outlet; the battery module is arranged in the shell. Wherein, be formed with the heat dissipation wind channel with air intake and air outlet intercommunication in the casing, the inner wall of casing is protruding inwards to be formed with a plurality of vortex structures to the heat dissipation wind channel. The application provides a battery pack, through be formed with the heat dissipation wind channel with air intake and air outlet intercommunication in the casing, the inner wall of casing is formed with a plurality of vortex structures to the protruding in the heat dissipation wind channel. Like this, the fluid accessible of radiating air duct in increases the flow resistance through a plurality of vortex structures, makes the heat transfer reinforcing of fluid in vortex structural region to improve radiating air duct and receive the influence of electric core inflation and narrow down to the heat exchange efficiency of battery module, avoided in the correlation technique the wind channel of clearance formation between the big face of electric core, lead to the problem that heat exchange efficiency is low.

Description

Battery pack

Technical Field

The application relates to the technical field of power batteries, in particular to a battery pack.

Background

The power battery is a power supply for providing a power source for the new energy automobile. The power battery is used as a new energy product with wider and wider application. In the field of power batteries of new energy automobiles, air cooling and liquid cooling are common heat management modes. The liquid cooling system is high in manufacturing cost and using cost, and has liquid leakage risks. Therefore, in some cases where the requirement for heat exchange is not high, air cooling becomes a very practical and cost-effective way of heat dissipation.

In the related art, the gap between the large surfaces of the battery cells is designed to be the air duct, so that the heat exchange area between the fluid and the battery cells is increased to improve the air cooling heat exchange efficiency, however, the air duct formed by the gap between the large surfaces of the battery cells is narrowed due to the influence of expansion of the battery cells, and the heat exchange efficiency is influenced. Therefore, how to improve the heat exchange efficiency of the air cooling system is a direction in which research is urgently needed in the field.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present application is to provide a battery pack, which aims to solve the technical problem of low heat exchange efficiency of the battery pack in the prior art.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the embodiment of the application provides a battery package, includes:

a housing having an air inlet and an air outlet;

the battery module is arranged in the shell;

the shell is internally provided with a heat dissipation air duct communicated with the air inlet and the air outlet, and the inner wall of the shell protrudes towards the heat dissipation air duct to form a plurality of turbulence structures.

In addition, the battery pack according to the present application may have the following additional technical features:

in some embodiments of the present application, in a direction from the air inlet to the air outlet, a density of distribution of the plurality of turbulent flow structures is gradually increased.

In some embodiments of the present application, a flow guiding member is disposed in the housing, and the flow guiding member is located in the heat dissipation air duct and separates the heat dissipation air duct into a first sub-air duct and a second sub-air duct.

In some embodiments of the application, be provided with a plurality ofly in the first sub-wind channel with the second sub-wind channel respectively the vortex structure, just a plurality of in the first sub-wind channel the intensive degree that the vortex structure distributes is greater than a plurality of in the second sub-wind channel the intensive degree that the vortex structure distributes.

In some embodiments of the present application, the fluid enters the first sub-air duct from the air inlet and flows out of the air outlet along a first predetermined fluid path;

fluid enters the second sub-air duct from the air inlet and flows out of the air outlet along a second preset fluid path;

wherein the first predetermined fluid path is shorter than the second predetermined fluid path.

In some embodiments of the present application, in a direction from the air inlet to the air outlet, the distribution density of the plurality of turbulence structures in the second sub-air duct gradually increases.

In some embodiments of this application, the water conservancy diversion spare includes first water conservancy diversion section and second water conservancy diversion section, the one end of second water conservancy diversion section with the one end of first water conservancy diversion section is connected, just first water conservancy diversion section with second water conservancy diversion section forms and predetermines the contained angle, the other end of second water conservancy diversion section to extend the setting in the first sub-wind channel.

In some embodiments of the present application, the angle of the preset included angle is α, where α satisfies: alpha is more than or equal to 90 degrees and less than or equal to 180 degrees.

In some embodiments of the present application, the turbulent flow structure is a turbulent flow column formed by the inner wall of the casing protruding into the heat dissipation air duct.

In some embodiments of the present application, the housing comprises a shell and a floor;

the shell is provided with a mounting cavity for mounting the battery module, and the air outlet is formed in the shell;

the bottom plate is connected with the shell, and the bottom plate and the outer cavity wall of the side, facing the bottom plate, of the mounting cavity define the heat dissipation air duct.

Compared with the prior art, the beneficial effects of this application are: the application provides a battery package, this battery package includes casing and battery module, and the battery module is located the casing, through be formed with the heat dissipation wind channel with air intake and air outlet intercommunication in the casing, the inner wall of casing is formed with a plurality of vortex structures to the protruding in the heat dissipation wind channel. Therefore, the flow resistance of fluid in the heat dissipation air channel can be increased through the plurality of turbulence structures, so that the heat exchange of the fluid in the turbulence structure area is enhanced, and the heat exchange efficiency of the heat dissipation air channel on the battery module is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 illustrates a schematic perspective view of a battery pack according to some embodiments of the present disclosure;

fig. 2 is a schematic view of a battery pack according to some embodiments of the present application;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic diagram illustrating an exploded view of a battery pack in some embodiments of the present application;

FIG. 5 shows a schematic view of FIG. 1 with the base plate removed;

FIG. 6 is an enlarged schematic view of the portion B of FIG. 5;

FIG. 7 shows a further perspective view of FIG. 1 with the base plate removed;

fig. 8 is an enlarged schematic view of the portion C of fig. 7.

Description of the main element symbols:

100-a battery pack; 110-a housing; 111-a backplane; 112-a housing; 1121-air inlet; 1122-an air outlet; 1123-mounting the cavity; 120-a battery module; 130-a heat dissipation air duct; 131-a first sub-duct; 132-a second sub-duct; 140-a flow disturbing structure; 141-turbulence column; 150-a flow guide; 151-a first flow guide section; 152-a second flow guide section.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 and fig. 2, an embodiment of the present application provides a battery pack 100, which is mainly used in a vehicle, such as a new energy vehicle, to provide a power source for the new energy vehicle.

As shown in fig. 3, the battery pack 100 includes a case 110 and a battery module 120. The battery module 120 is disposed in the housing 110. The housing 110 has the air inlet 1121 and the air outlet 1122, fluid enters from the air inlet 1121 and is discharged from the air outlet 1122, and in the process that the fluid flows from the air inlet 1121 to the air outlet 1122 and is discharged in the housing 110, the heat emitted by the battery module 120 is absorbed, so that the temperature is gradually increased in the flowing process of the fluid, heat exchange is realized, and the heat of the battery module 120 is reduced.

A heat dissipation air duct 130 communicated with the air inlet 1121 and the air outlet 1122 is formed in the casing 110, and a plurality of flow disturbing structures 140 are formed on the inner wall of the casing 110 protruding into the heat dissipation air duct 130. In the process, the flow resistance of the fluid in the heat dissipation air duct 130 is increased by the plurality of turbulence structures 140, and the temperature difference of the battery module 120 caused by the temperature change of the fluid from the air inlet 1121 to the air outlet 1122 can be compensated to a certain extent, so that the heat exchange efficiency is improved.

In the related art, the gap between the large surfaces of the battery cells is designed to be the air duct, so that the heat exchange area between the fluid and the battery cells is increased to improve the air cooling heat exchange efficiency, however, the air duct formed by the gap between the large surfaces of the battery cells is narrowed due to the influence of expansion of the battery cells, and the heat exchange efficiency is influenced.

In the battery pack 100 provided in the embodiment of the present application, the heat dissipation air duct 130 communicated with the air inlet 1121 and the air outlet 1122 is formed in the casing 110, and the plurality of flow disturbing structures 140 are formed on the inner wall of the casing 110 protruding into the heat dissipation air duct 130. Like this, the fluid accessible of heat dissipation wind channel 130 in increases the flow resistance through a plurality of vortex structures 140, makes the heat transfer reinforcing of fluid in vortex structure 140 region to improve heat dissipation wind channel 130 and to battery module 120's heat exchange efficiency, avoided among the relevant art the wind channel that the clearance between the big face of electric core formed to receive the influence of electric core inflation and narrow down, lead to the problem of heat exchange efficiency low.

As shown in fig. 1 and fig. 5, in an embodiment, optionally, the distribution density of the plurality of turbulence structures 140 is gradually increased in a direction from the air inlet 1121 to the air outlet 1122. That is, the positions of the plurality of turbulence structures 140 near the air inlet 1121 are sparsely distributed, and the positions of the plurality of turbulence structures 140 near the air outlet 1122 are densely distributed, that is, the greater the number of turbulence structures 140 in a unit area is, the greater the density is, and the smaller the number of turbulence structures 140 in a unit area is, the smaller the density is. Since the temperature of the fluid at the air inlet 1121 is low, the fluid is favorable for absorbing and exchanging heat of the battery module 120, and when the fluid flows to the vicinity of the air outlet 1122, the temperature of the fluid gradually increases, and at this time, the effect of absorbing heat generated by the battery module 120 is reduced.

In this embodiment, the plurality of turbulence structures 140 are sparsely distributed at positions close to the air inlet 1121, the plurality of turbulence structures 140 are densely distributed at positions close to the air outlet 1122, the flow rate of the fluid passing through the plurality of turbulence structures 140 in unit time is blocked, the flow resistance of the fluid at positions close to the air outlet 1122 is increased, the temperature difference of the fluid from the air inlet 1121 to the air outlet 1122 due to temperature change is effectively compensated, and the heat exchange effect is improved.

Referring to fig. 5, it can be understood that the distribution density of the plurality of turbulence structures 140 is the number of turbulence structures 140 in unit area in the heat dissipation air duct 130, the smaller the number of turbulence structures 140 in unit area is, the sparseness is obtained, and the larger the number of turbulence structures 140 in unit area is, the density is obtained.

As shown in fig. 4 and 7, in one embodiment, optionally, a flow guide 150 is disposed in the casing 110, and the flow guide 150 is located in the heat dissipation air duct 130 and divides the heat dissipation air duct 130 into a first sub-air duct 131 and a second sub-air duct 132. The heat dissipation air duct 130 is divided into two air ducts by the flow guiding member 150, that is, the first sub air duct 131 and the second sub air duct 132, so that the fluid entering from the air inlet 1121 can be discharged from the air outlet 1122 after passing through the first sub air duct 131 and the second sub air duct 132, and the flow distribution of the fluid is more balanced, so that the fluid exchanges heat with the battery module 120 in the first sub air duct 131 and the second sub air duct 132, respectively.

In the above embodiment, further, a plurality of flow-disturbing structures 140 are respectively disposed in the first sub-air duct 131 and the second sub-air duct 132, and the density of the distribution of the plurality of flow-disturbing structures 140 in the first sub-air duct 131 is greater than the density of the distribution of the plurality of flow-disturbing structures 140 in the second sub-air duct 132.

In this embodiment, since the air outlet 1122 is close to the first sub-air duct 131, the flow rate of the fluid entering from the air inlet 1121 through the first sub-air duct 131 per unit time is greater than the flow rate of the fluid flowing through the second sub-air duct 132 per unit time, so that the flow rate distribution of the fluid is not uniform, and the heat exchange effect is affected. The distribution density of the plurality of turbulence structures 140 in the first sub-air channel 131 is greater than that of the plurality of turbulence structures 140 in the second sub-air channel 132, so that the distribution density of the plurality of turbulence structures 140 in the first sub-air channel 131 can increase the flow resistance of the first sub-air channel 131, and the flow of fluid in the first sub-air channel 131 is reduced, so that the distribution of the flow of fluid in the first sub-air channel 131 and the second sub-air channel 132 is more balanced, and the heat exchange of the battery module 120 is facilitated. Further, it is ensured that the temperature difference between the portions of the battery module 120 located in the first sub-air duct 131 and the second sub-air duct 132 is controllable.

Still further referring to fig. 5, the fluid enters the first sub-duct 131 from the air inlet 1121 and flows out of the air outlet 1122 along a first predetermined fluid path, where the first predetermined fluid path is indicated by an arrow in the first sub-duct 131 in fig. 5. The fluid enters the second sub-air duct 132 from the air inlet 1121 and flows out of the air outlet 1122 along a second predetermined fluid path, which is indicated by an arrow in the second sub-air duct 132 in fig. 5.

In this embodiment, the first predetermined fluid path is shorter than the second predetermined fluid path. Like this, with the intensive degree that a plurality of vortex structures 140 in the first sub-wind channel 131 distribute be greater than the intensive degree that a plurality of vortex structures 140 in the second sub-wind channel 132 distribute and match, avoid the uneven condition that leads to battery module 120 to have great difference in temperature of fluid flow in first sub-wind channel 131 and the second sub-wind channel 132, guaranteed battery module 120's performance and life.

As shown in fig. 5 and fig. 7, in the embodiment where the heat dissipation air duct 130 includes the first sub-air duct 131 and the second sub-air duct 132, optionally, in a direction from the air inlet 1121 to the air outlet 1122, the density of the distribution of the plurality of flow-disturbing structures 140 in the second sub-air duct 132 gradually increases.

In this embodiment, in the second sub-air channel 132, the plurality of turbulence structures 140 are sparsely distributed at positions close to the air inlets 1121, the plurality of turbulence structures 140 are densely distributed at positions close to the air outlets 1122, and the flow of the fluid passing through the plurality of turbulence structures 140 in unit time is blocked, so as to balance the fluid flow in the first sub-air channel 131, so that the fluid flow in the first sub-air channel 131 and the fluid flow in the second sub-air channel 132 are substantially balanced, thereby effectively compensating for the temperature difference of the battery module 120 caused by the lengths of the paths of the fluid in the first sub-air channel 131 and the fluid in the second sub-air channel 132, and avoiding the influence of the temperature difference on the service performance and the service life of the battery module 120.

As shown in fig. 6, in any embodiment of the battery pack 100 having the flow guide member 150, further, the flow guide member 150 includes a first flow guide section 151 and a second flow guide section 152. One end of the second flow guiding section 152 is connected to one end of the first flow guiding section 151, a preset included angle is formed between the first flow guiding section 151 and the second flow guiding section 152, and the other end of the second flow guiding section 152 extends into the first sub-air duct 131. In this way, the part of the second flow guide section 152 extending to the first sub-air duct 131 forms a barrier to fluid, and reduces the flow rate in the first sub-air duct 131, so that the flow rate of the fluid is matched with the flow rate in the second sub-air duct 132, the flow rates in the first sub-air duct 131 and the second sub-air duct 132 are more balanced, the influence on the service performance and the service life of the battery module 120 due to the temperature difference of the parts of the battery module 120 located at the first sub-air duct 131 and the second sub-air duct 132 is avoided, and the service performance of the battery pack 100 is improved and the service life of the battery pack 100 is prolonged.

It can be understood that the first flow guiding section 151 and the second flow guiding section 152 may be formed by separately molding and connecting to form the flow guiding member 150, or may be formed by integrally molding to form the flow guiding member 150, and the flow guiding member 150 may be a flow guiding rib or a flow guiding plate.

In the above embodiment, further, the angle of the preset included angle is α, where α satisfies: alpha is more than or equal to 90 degrees and less than or equal to 180 degrees. In this embodiment, the angle α of the preset included angle is 135 degrees, so as to ensure the blockage of the fluid in the first sub-air duct 131 and reduce the fluid flow in the first sub-air duct 131.

It should be noted that, in other embodiments, the angle α of the preset included angle may also be selected from 90 degrees, 95 degrees, 100 degrees, 110 degrees, 120 degrees, 140 degrees, 150 degrees, 180 degrees, and the like, and may be adjusted according to the number of the turbulence structures 140 in the first sub-air channels 131 and the second sub-air channels 132.

As shown in fig. 8, in any of the above embodiments, for example, the flow disturbing structure 140 is a flow disturbing pillar 141 formed by protruding the inner wall of the casing 110 into the heat dissipation air duct 130. On the one hand, the turbulence column 141 is convenient for manufacturing, improves the production efficiency, and reduces the production cost, and on the other hand, the turbulence column 141 is convenient for fluid turbulence, and especially is the cylindrical turbulence column 141. Of course, in other embodiments, the spoiler pillar 141 may also have a prism or rectangular pillar structure and a polygonal pillar structure.

It should be noted that, in other embodiments, the spoiler structure 140 may also select other structures having a spoiler function besides the spoiler post 141, which is not described herein again.

Further, the turbulence column 141, the flow guide 150 and the housing 110 are integrally formed. Three integrated into one piece makes, and on the one hand, integrated into one piece makes the joint strength who has increased between the three, has reduced the probability of breaking occur between the three, has improved the structural strength of product, and on the other hand, three integrated into one piece makes, and the manufacturing of being convenient for has improved production efficiency, has reduced manufacturing cost to the market competition of product has been improved.

It should be noted that in other embodiments, the turbulence column 141, the flow guide 150 and the housing 110 may be separately connected.

Further, it is understood that the materials of the turbulence column 141, the flow guide member 150 and the housing 110 are not particularly limited, and only the manufacturing requirements of the battery pack 100 need to be satisfied, and may be adjusted according to the actual needs of the product. In this embodiment, the turbulence column 141, the flow guiding member 150, and the casing 110 are made of aluminum, which has light weight and high heat transfer efficiency, and facilitates heat dissipation. Of course, in other embodiments, the material of the turbulence column 141, the flow guiding element 150 and the housing 110 may also be stainless steel or plastic, and the description thereof is omitted here.

In any of the above embodiments, as shown in fig. 3 and 4, optionally, the housing 110 includes a shell 112 and a base plate 111.

Specifically, the housing 112 has a mounting cavity 1123 for mounting the battery module 120, the air outlet 1122 is disposed in the housing 112, the bottom plate 111 is connected to the housing 112, an outer cavity wall of one side of the bottom plate 111 facing the bottom plate 111 defines the heat dissipation air duct 130, and an end of the outer cavity wall of the housing 112 and an end of the bottom plate 111 form the air inlet 1121. The heat dissipation air channel 130 formed by integrating the heat dissipation air channel 130 with the housing 112 and the bottom plate 111 is convenient for production and manufacturing, and does not occupy the installation space of the battery module 120.

Illustratively, the turbulence column 141 and the flow guide 150 are integrally formed with the outer cavity wall of the housing 112.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A battery pack, comprising:

a housing having an air inlet and an air outlet;

the battery module is arranged in the shell;

2. The battery pack of claim 1, wherein the plurality of turbulence structures are distributed with increasing density in a direction from the air inlet to the air outlet.

3. The battery pack according to claim 1, wherein a flow guide member is disposed in the housing, and the flow guide member is located in the heat dissipation air duct and divides the heat dissipation air duct into a first sub-air duct and a second sub-air duct.

4. The battery pack according to claim 3, wherein the first sub-air passage and the second sub-air passage are respectively provided with a plurality of turbulence structures therein, and the density of the distribution of the plurality of turbulence structures in the first sub-air passage is greater than the density of the distribution of the plurality of turbulence structures in the second sub-air passage.

5. The battery pack of claim 3, wherein fluid enters the first sub-duct from the air inlet and exits from the air outlet along a first predetermined fluid path;

6. The battery pack of claim 5, wherein the distribution density of the plurality of flow-disturbing structures in the second sub-duct is gradually increased in a direction from the air inlet to the air outlet.

7. The battery pack according to any one of claims 3 to 6, wherein the flow guide member includes a first flow guide section and a second flow guide section, one end of the second flow guide section is connected to one end of the first flow guide section, the first flow guide section and the second flow guide section form a preset included angle, and the other end of the second flow guide section extends into the first sub-duct.

8. The battery pack of claim 7, wherein the predetermined included angle is α, where α satisfies: alpha is more than or equal to 90 degrees and less than or equal to 180 degrees.

9. The battery pack according to any one of claims 3 to 6, wherein the flow disturbing structure is a flow disturbing column formed by protruding an inner wall of the housing into the heat dissipation air duct.

10. The battery pack of any one of claims 1-6, wherein the housing comprises an outer shell and a bottom plate;