CN218602584U - Battery pack and box body thereof - Google Patents

Abstract

The application relates to the technical field of energy storage devices, and discloses a battery pack and a box body thereof, wherein the box body comprises a plurality of box walls, a first cavity is formed in each box wall, the first cavity penetrates through two ends of each box wall to form an opening, and the box walls surround to form a containing cavity for containing a battery core; the box body further comprises a first plugging piece, and the first plugging piece is connected to the box wall and plugs the opening. The setting of first die cavity can effectively alleviate the weight of tank wall to help reducing the whole weight of box, the opening on the shutoff piece shutoff tank wall can effectively prevent the abnormal sound that produces because of the air current gets into first die cavity. The battery pack with the box body also has the advantages.

Description

Battery pack and box body thereof

Technical Field

The application relates to the technical field of energy storage devices, in particular to a battery pack and a box body thereof.

Background

The power battery pack has wide application in new energy automobiles, and generally, the battery pack bears a plurality of battery cells and other devices through a box body, and the battery cells are connected in series and/or in parallel to meet different voltage and capacity requirements. However, after the battery pack is mounted on the vehicle, abnormal sound often occurs in the battery pack in the actual use process, and normal running and detection and maintenance are affected.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a box body which can reduce the risk of abnormal sound of a battery pack.

The embodiment of the application also provides a battery pack with the box body.

The box body comprises a plurality of box walls, wherein a first cavity is formed in each box wall, the first cavity is provided with an opening, and a containing cavity for containing a battery core is formed by surrounding the box walls; the box body further comprises a first blocking piece, and the first blocking piece is connected to the box wall and blocks the opening.

The box of this application first aspect embodiment has following beneficial effect at least: the setting of first die cavity can effectively alleviate the weight of tank wall to help reducing the whole weight of box, the opening on the shutoff piece shutoff tank wall can effectively prevent to get into the abnormal sound that produces in the first die cavity because of the air current.

According to some embodiments of the application, the tank wall includes first lateral wall and second lateral wall, the inside cavity of first lateral wall forms first die cavity, first die cavity link up the both ends of first lateral wall form first opening, the end connection of second lateral wall in the orientation of first lateral wall hold the wall of chamber, first opening part is provided with first shutoff piece, first shutoff piece connect in first lateral wall or second lateral wall and shutoff first opening.

According to some embodiments of the application, the first blocking piece comprises a connecting portion and a blocking portion, the blocking portion blocks the first opening, and the connecting portion is connected to an outer side wall surface of the first side wall or the second side wall.

According to some embodiments of the application, a set angle is provided between a surface where an end of the first side wall is located and an outer side wall surface of the second side wall, the blocking portion and the connecting portion are of a sheet structure, the blocking portion abuts against the end of the first side wall and blocks the first opening, and the connecting portion abuts against the outer side wall surface of the second side wall and is connected to the second side wall.

According to some embodiments of the application, the first side wall is made of a profile, and the first side wall and the second side wall are detachably connected.

According to some embodiments of the application, the wall surface of the first side wall facing the accommodating cavity is provided with a first mounting hole corresponding to the end position of the second side wall, and the end of the second side wall is provided with a second mounting hole corresponding to the position of the first mounting hole.

According to some embodiments of this application, deviating from of first lateral wall the wall of second lateral wall is provided with lets a mouthful, let a mouthful corresponding to first mounting hole, first shutoff piece shutoff first opening with let a mouthful.

According to some embodiments of the application, still be provided with the lug on the tank wall, the lug is certainly the outer wall surface protrusion of tank wall, be provided with the hole for hoist on the lug.

According to some embodiments of the application, the inside cavity of the lug forms a second cavity, the second cavity runs through two sides of the lug to form a second opening, a second blocking piece is arranged at the second opening, and the second blocking piece is connected to the lug and blocks the second opening.

The battery pack according to the embodiment of the second aspect of the present application includes a battery core and the box body of the embodiment of the second aspect, and a plurality of battery cores are accommodated in the accommodating cavity.

The battery pack of the embodiment of the second aspect of the present application has at least the following beneficial effects: the box body of the first aspect embodiment is light in weight, and abnormal noise generated when air flow enters the first cavity of the box wall can be prevented, so that the risk of abnormal noise of the battery pack can be reduced.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is an exploded view of a portion of a housing according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a case according to an embodiment of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of a housing according to another embodiment of the present application;

FIG. 5 is an enlarged view of a portion of the portion B of FIG. 4;

FIG. 6 is a schematic view of another angle of the case of the embodiment shown in FIG. 2;

FIG. 7 is an enlarged view of a portion of FIG. 6 at C;

FIG. 8 is a schematic structural diagram of a case according to another embodiment of the present application;

fig. 9 is a partially enlarged view of a portion D in fig. 8.

Reference numerals:

the structure comprises a box wall 100, a first side wall 101, a second side wall 102, a first opening 103, a connecting angle 104, a relief opening 105, a second connecting hole 106, a first mounting hole 107, a second mounting hole 108 and a bottom plate 109;

a first plugging member 200, a plugging portion 201, a connecting portion 202, a first connecting hole 203;

lifting lug 300, second opening 301, second plugging piece 302 and lifting hole 303.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function 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 positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, several means are one or more, and the above, below, within and the like are understood to include the present numbers. If there is a description of first, second, etc. for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 present application. In this specification, the schematic representations of the terms used above do not necessarily 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.

The box of battery package because the effect that needs satisfy bearing, installation and protection, requires to have sufficient intensity usually, and some battery packages adopt the great box of thickness or set up additional strengthening such as strengthening rib on the tank wall to improve the intensity of box, but this mode makes the weight of box increase, is unfavorable for the promotion of the whole energy density of battery package. Some battery packs are made into box bodies by adopting section plates, and because the sections are internally provided with the cavities, when an automobile adopting the battery packs runs, air flow easily enters the cavities to make abnormal sound, so that the normal use is influenced.

The battery pack and the box body thereof can effectively reduce the weight of the battery pack and reduce the risk of abnormal sound generated by the battery pack.

Fig. 1 is an exploded schematic view of a part of a structure of a case according to an embodiment of the present application, fig. 2 is a schematic view of a structure of a case according to an embodiment of the present application, fig. 3 is a schematic view of a portion a in fig. 2 enlarged, and referring to fig. 1 to fig. 3, a first aspect of the present application provides a case applied to a battery pack for accommodating a battery cell. The box body comprises a plurality of box walls 100, a first cavity is formed in part or all of the box walls 100, and according to the specific structure and strength requirements of a battery pack, the first cavity can be formed in part of the box walls 100 in the box walls 100, and the first cavity can also be formed in all the box walls 100 to form the hollow box walls 100, so that the weight of the box walls 100 can be effectively reduced while the strength of the box walls 100 is ensured. The first cavity has an opening, and a plurality of box walls 100 surround to form a containing cavity for containing the battery core.

The box of this embodiment still includes first shutoff piece 200, and first shutoff piece 200 is connected in the opening of tank wall 100 and shutoff first die cavity to can prevent effectively that the air current from getting into first die cavity, avoid producing the abnormal sound. In addition, the heat exchange between the wind and the box wall 100 can be effectively reduced, and the heat insulation performance of the battery cell is improved.

Referring to fig. 1, in some embodiments, the tank wall 100 includes a first side wall 101 and a second side wall 102, the first side wall 101 is hollow to form a first cavity, and the first cavity penetrates through both ends of the first side wall 101 to form a first opening 103, so as to facilitate formation of the first cavity and manufacture of the first side wall 101. The end of the second side wall 102 is connected to the wall surface of the first side wall 101 facing the accommodating cavity to realize splicing, a first blocking piece 200 is arranged at the first opening 103, and the first blocking piece 200 is connected to the first side wall 101 or the second side wall 102 and blocks the first opening 103, so that air flow is prevented from entering the first cavity of the first side wall 101. Generally, the battery pack is assembled in a battery compartment of an automobile, when the automobile runs, air flow entering the battery compartment flows along the length direction of the box body, and the first side wall 101 of the embodiment of the present application extends along the length direction of the box body, so that the strength of the box body in the length direction can be increased, and the first side wall 101 is blocked by the first blocking piece 200, so that abnormal sound caused by the air flow entering the first cavity is avoided.

In the embodiment of the present application, the form of the first closure member 200 for blocking the first opening 103 may be varied, for example, the first closure member 200 is inserted into the first opening 103, or a part of the first closure member is located inside the first opening 103 and another part is located outside the first opening 103 and covers the first closure member 200, or a part of the first closure member 200 covers the first opening 103 and another part is connected to the side of the tank wall 100, or the first closure member 200 covers the first opening 103 and is welded to the edge of the first opening 103. The battery pack can reasonably configure the plugging mode and the connection mode of the first plugging piece 200 according to the structure and the connection requirement of an actual box body.

Fig. 4 is a schematic view of a box body according to another embodiment of the present invention, fig. 5 is a partial enlarged view at B in fig. 4, and referring to fig. 4 and 5, in some embodiments, an end of the first sidewall 101 is located at a set angle with an outer sidewall surface of the second sidewall 102, the first blocking member 200 includes a connecting portion 202 and a blocking portion 201, the blocking portion 201 and the connecting portion 202 are in a sheet structure, the blocking portion 201 abuts against the end of the first sidewall 101 and blocks the first opening 103, and the connecting portion 202 abuts against the outer sidewall surface of the second sidewall 102 and is connected to the second sidewall 102, thereby forming a block to the first opening 103 and a fixed connection of the first blocking member 200. The first blocking piece 200 may be integrally formed by a conventional machining process using a sheet material. Taking the first blocking piece 200 connected to the second sidewall 102 as an example, the connecting portion 202 of the first blocking piece 200 may be provided with a first connecting hole 203, the second sidewall 102 may be correspondingly provided with a second connecting hole 106, and the first blocking piece 200 may be fixedly connected by a fastener passing through the first connecting hole 203 and being mounted in the second connecting hole 106, and may be conveniently detached when needed.

The first side wall 101 can be manufactured in various ways, for example, the first side wall 101 can be made of a section bar, the inside of the section bar is provided with a cavity, therefore, the section bar has the characteristics of appropriate strength and light weight, the section bar with appropriate size and strength is selected, and the first side wall 101 is formed by cutting, so that the first cavity inside forms the first opening 103 at the cutting position. Alternatively, the first sidewall 101 may be formed by fixedly connecting a plurality of plates, and the plurality of plates surround to form the first cavity.

The first side wall 101 and the second side wall 102 can be detachably connected in various ways, for example, referring to fig. 1 to 3 and fig. 6 to 7, a wall surface of the first side wall 101 facing the accommodating cavity is provided with a first mounting hole 107 corresponding to an end position of the second side wall 102, an end portion of the second side wall 102 is provided with a second mounting hole 108 corresponding to a position of the first mounting hole 107, and the first side wall 101 and the second side wall 102 can be detachably connected by a fastener passing through the first mounting hole 107 and being connected with the second mounting hole 108, which is simple and reliable in connection manner. Of course, it can be understood that the first side wall 101 and the second side wall 102 can also be detachably connected by a snap-fit manner (not shown), for example, a snap hole may be provided on an inner side wall surface of the first side wall 101, and a snap is provided at an end portion of the second side wall 102, and the snap hole may be snapped during connection.

Referring to fig. 6-9, in some embodiments, a wall of the first sidewall 101 facing away from the second sidewall 102 is provided with a relief opening 105, the relief opening 105 corresponding to the first mounting hole 107, thereby facilitating mounting of the fastener. The first blocking piece 200 blocks the first opening 103 and the yielding port 105, and can effectively prevent air flow from entering the first cavity. The first blocking piece 200 can comprise a connecting portion 202 and a blocking portion 201, the blocking portion 201 is blocked at the first opening 103, the connecting portion 202 is connected to the outer side wall surface of the second side wall 102, so that the first blocking piece 200 can be conveniently connected and detached, after the first side wall 101 and the second side wall 102 are connected, the first blocking piece 200 can be installed and the first opening 103 can be blocked, the first cavity can be blocked, when the first side wall 101 and the second side wall 102 need to be detached, the first blocking piece 200 can be detached firstly, the relief opening 105 is exposed so as to operate a fastener, and therefore the first side wall 101 and the second side wall 102 can be detached.

Referring to fig. 1, the box body includes a pair of first sidewalls 101 disposed opposite to each other, and a pair of second sidewalls 102 disposed opposite to each other, ends of the second sidewalls 102 are respectively connected to side portions of two ends of the first sidewalls 101, the first sidewalls 101 and the second sidewalls 102 surround to form an outer frame of the box body, and the outer frame is connected to a bottom plate 109 (see fig. 4 and 8) to form a receiving cavity capable of receiving the battery cell. The first cavity inside the first sidewall 101 penetrates through both ends of the first sidewall 101 to form a first opening 103, fig. 2 to 5 show a structure in which a first blocking piece 200 is disposed at one end of the first sidewall 101, fig. 6 to 9 show a structure in which a first blocking piece 200 is disposed at the other end of the first sidewall 101, both ends of the first sidewall 101 may adopt the same structure to connect the same first blocking piece 200, or may be arranged to form different structural forms according to actual connection and installation requirements, for example:

in the embodiment shown in fig. 1 to 5, the end face of one end of the first side wall 101 is inclined with respect to the wall surface of the first side wall 101, so that after the first side wall 101 and the second side wall 102 are connected, the set angle between the surface where the end of the first side wall 101 is located and the outer side wall surface of the second side wall 102 is an obtuse angle, thereby forming an inclined connection angle 104, which is adaptable to the installation space inside the box and the layout of other devices. The angle between the closing portion 201 and the connecting portion 202 is matched with the end surface inclination angle of the first side wall 101, whereby the connecting portion 202 of the first closing member 200 is connected to the outer wall surface of the first side wall 101, and the closing portion 201 is attached to the end portion of the first side wall 101 so as to cover the first opening 103.

In the embodiment shown in fig. 6 to 9, the end surface of one end of the first sidewall 101 is perpendicular to the wall surface of the first sidewall 101, and therefore, after the first sidewall 101 and the second sidewall 102 are connected, the end surface of the first sidewall 101 is perpendicular to the wall surface of the second sidewall 102. The plugging portion 201 and the connecting portion 202 are perpendicular to each other, so that the connecting portion 202 of the first plugging member 200 is connected to the outer wall surface of the second side wall 102, and the plugging portion 201 is attached to the end portion of the first side wall 101 so as to cover the first opening 103 and the relief opening 105 opened in the outer wall surface of the first side wall 101.

Referring to fig. 6 to 9, in some embodiments, a lifting lug 300 is further disposed on the tank wall 100, the lifting lug 300 protrudes from the outer wall surface of the tank wall 100, and a lifting hole 303 is disposed on the lifting lug 300 and used for lifting the battery box. The inner part of the lifting lug 300 is hollow to form a second cavity, so that the weight of the lifting lug 300 can be reduced while the strength is ensured, the second cavity penetrates through two sides of the lifting lug 300 to form a second opening 301, wherein the lifting lug 300 can be formed by cutting a section material with a cavity inside in a proper size, so that the second opening 301 is formed at the cut position, in order to avoid abnormal noise caused by airflow flowing into the second cavity, a second blocking piece 302 can be arranged at the second opening 301, the second blocking piece 302 is connected to the lifting lug 300 and blocks the second opening 301, so that the second opening 301 is blocked, and the second blocking piece 302 can be connected to the opening of the lifting lug 300 in a welding, bonding, clamping and other modes.

In a second embodiment of the present application, a battery pack (not shown) is provided, which includes a battery cell (not shown) and the box body of the first embodiment, where a plurality of battery cells are accommodated in an accommodating cavity of the box body, and the box body is used for bearing and protecting the battery cells. The battery pack may further include a case cover (not shown) that covers the accommodation cavity of the case body, thereby enclosing the battery cell and various devices in the accommodation cavity. As can be seen from the above, the case of the first embodiment is light in weight and can prevent the air flow from entering the first cavity of the case wall 100 to generate abnormal noise, thereby reducing the risk of abnormal noise of the battery pack.

The box and the battery pack of the embodiment of the application can be applied to a power battery system of a new energy automobile, the weight can be reduced, the improvement of the whole energy density of the battery pack is facilitated, the abnormal sound problem caused by the fact that wind current enters the box wall 100 of the box body is effectively avoided, and the whole quality of the automobile is improved beneficially.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims (10)

1. The box, its characterized in that includes:

the battery cell box comprises a plurality of box walls, wherein a first cavity is formed in part or all of the box walls, the first cavity is provided with an opening, and the box walls surround to form a containing cavity for containing a battery cell;

a first closure member connected to the tank wall and closing off the opening.

2. The box body according to claim 1, wherein the box wall comprises a first side wall and a second side wall, the first side wall is hollow to form a first cavity, the first cavity penetrates through two ends of the first side wall to form a first opening, the end of the second side wall is connected to the wall surface of the first side wall facing the accommodating cavity, the first opening is provided with the first blocking piece, and the first blocking piece is connected to the first side wall or the second side wall and blocks the first opening.

3. The box according to claim 2, wherein the first closing member includes a connecting portion and a closing portion, the closing portion closes the first opening, and the connecting portion is connected to an outer side wall surface of the first side wall or the second side wall.

4. A cabinet according to claim 3, wherein a predetermined angle is provided between a surface of the end portion of the first side wall and an outer side wall surface of the second side wall, the blocking portion and the connecting portion are of a sheet-like structure, the blocking portion abuts against the end portion of the first side wall and blocks the first opening, and the connecting portion abuts against the outer side wall surface of the second side wall and is connected to the second side wall.

5. A cabinet as claimed in claim 2, wherein the first side wall is formed from a profile, and the first side wall and the second side wall are removably connected.

6. The cabinet as claimed in claim 5, wherein a wall surface of the first side wall facing the receiving chamber is provided with a first mounting hole at a position corresponding to an end portion of the second side wall, and a second mounting hole is provided at a position corresponding to the first mounting hole at an end portion of the second side wall.

7. The box body according to claim 6, wherein a wall surface of the first side wall facing away from the second side wall is provided with a relief opening, the relief opening corresponds to the first mounting hole, and the first blocking piece blocks the first opening and the relief opening.

8. The box body as claimed in any one of claims 1 to 7, wherein a lifting lug is further arranged on the box wall, the lifting lug protrudes from the outer wall surface of the box wall, and a lifting hole is formed in the lifting lug.

9. The box body as claimed in claim 8, wherein the inside of the lifting lug is hollow to form a second cavity, the second cavity penetrates through two sides of the lifting lug to form a second opening, a second blocking piece is arranged at the second opening, and the second blocking piece is connected to the lifting lug and blocks the second opening.

10. A battery pack comprising cells and a case according to any one of claims 1 to 9, a plurality of the cells being housed in the housing cavities.

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