CN220368049U - Battery pack shell and battery pack - Google Patents

Abstract

The utility model provides a battery pack shell and a battery pack, and relates to the technical field of batteries. The battery can body comprises a shell, a beam body, a connecting column and a limiting piece. An accommodating space is arranged in the shell. The roof beam body is located accommodation space inside, and with accommodation space's diapire fixed connection. The connecting column comprises a column body and a limiting part, and the limiting part is convexly arranged on the periphery of one end of the column body; the cylinder runs through shell and roof beam body, and spacing portion supports in the bottom of shell. The locating part is connected in the cylinder, and the locating part is kept away from the one side fixed connection of accommodation space diapire with the roof beam body. The battery pack provided by the utility model adopts the battery pack shell. The battery pack shell and the battery pack can solve the technical problem that in the prior art, the reliability of the battery is reduced due to low strength of a welding part of a hanging point structure.

Description

Battery pack shell and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack shell and a battery pack.

Background

In order to increase the rigidity and strength of the battery pack, a middle mounting structure is generally provided in the battery pack with a larger width dimension, but the middle mounting structure increases the complexity of the structure, and creates a new safety risk.

The structural strength risk is mainly that the strength of a welding line of a middle mounting point is insufficient, and the screw thread part bears axial force to cause screw thread damage or torque attenuation.

Disclosure of Invention

The utility model aims to provide a battery pack shell which can solve the technical problem that the reliability of a battery is reduced due to low strength of a welding part of a hanging point structure in the prior art.

The utility model also aims to provide a battery pack which can solve the technical problem that the reliability of the battery is reduced due to low strength of a welding part of a hanging point structure in the prior art.

Embodiments of the utility model may be implemented as follows:

an embodiment of the present utility model provides a battery pack case including:

a housing having an accommodating space therein;

the beam body is arranged in the accommodating space and is fixedly connected with the bottom wall of the accommodating space;

the connecting column comprises a column body and a limiting part, and the limiting part is convexly arranged on the periphery of one end of the column body; the column penetrates through the shell and the beam body, and the limiting part is propped against the bottom of the shell; the method comprises the steps of,

the limiting piece is connected to the column body, and the limiting piece is fixedly connected with one side, away from the bottom wall of the accommodating space, of the Liang Tiyuan.

Optionally, a clamping groove is formed in the periphery of the cylinder, and the limiting piece is embedded into the clamping groove.

Optionally, the opposite sides of the column body are provided with the clamping grooves; the battery shell body comprises two limiting parts, and the two limiting parts are respectively embedded into the two clamping grooves.

Optionally, the limiting piece is sheet-shaped.

Optionally, an assembly groove is further formed in the end portion of the cylinder, provided with the limiting portion, and threads are formed in the inner side wall of the assembly groove; the battery pack shell further comprises a bottom guard plate and a first connecting portion, the first connecting portion is in threaded fit with the assembly groove, and the first connecting portion and the limiting portion clamp the bottom guard plate together.

Optionally, the battery pack case further includes a first seal member pressed between the limit portion and the bottom guard plate.

Optionally, an assembly part with a smaller diameter is formed at one end of the cylinder away from the limiting part, and a step-shaped structure is formed at one side of the cylinder away from the limiting part; the battery pack shell further comprises a second connecting portion, the second connecting portion is in threaded fit with the assembling portion, and the upper cover of the shell is clamped between the second connecting portion and the stepped structure of the end portion of the column body.

Optionally, the battery pack housing further comprises a second seal that is compressed between the upper cover and the stepped structure of the post end.

Optionally, the cylinder is provided with an assembly hole along the axis, and the battery pack shell further comprises a connecting piece, and the connecting piece passes through the assembly hole to be connected to electric equipment.

A battery pack includes a battery pack case. The battery can body includes:

a housing having an accommodating space therein;

the beam body is arranged in the accommodating space and is fixedly connected with the bottom wall of the accommodating space;

the connecting column comprises a column body and a limiting part, and the limiting part is convexly arranged on the periphery of one end of the column body; the column penetrates through the shell and the beam body, and the limiting part is propped against the bottom of the shell; the method comprises the steps of,

the limiting piece is connected to the column body, and the limiting piece is fixedly connected with one side, away from the bottom wall of the accommodating space, of the Liang Tiyuan.

The battery pack shell and the battery pack provided by the utility model have the beneficial effects compared with the prior art that:

in this battery package casing, under the condition that the spliced pole assembled on the shell, owing to the locating part is connected at the periphery of cylinder 310 to the locating part supports to hold on the roof beam body, and the locating part supports the bottom at the shell, can provide clamping action through locating part and locating part to the cylinder, can promote the connection stability of cylinder 310 in the battery package casing, saved welded mode among the prior art simultaneously, just can avoid the problem that the battery overall reliability is lower that the welding seam intensity leads to inadequately. And, because can be through the limiting part and limit the restriction effect of limit portion joint to cylinder axial direction, can alleviate the pulling effort that cylinder both ends connection structure received in axial direction, and then can improve the easy impaired technical problem of cylinder both ends connection structure. Therefore, the battery pack shell and the battery pack can solve the technical problem that the reliability of the battery is reduced due to low strength of the welding part of the hanging point structure in the prior art.

Further, in the battery pack shell, the column body is firmly connected in a mode of arranging the limiting piece, so that sealing is achieved only by arranging the first sealing piece and the second sealing piece at two ends of the column body respectively, the number of sealing structures is reduced, and the technical problem that the risk points are increased due to the fact that the sealing points are multiple in the prior art can be solved.

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 an exploded view of a battery pack case according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;

FIG. 3 is an enlarged view of a cross-sectional view of a partial battery pack housing provided in an embodiment of the present application;

fig. 4 is a partial enlarged view of a cross-sectional view of a battery pack case provided in an embodiment of the present application;

fig. 5 is an enlarged view of a partial structure of a battery pack case provided in an embodiment of the present application.

Icon: 10-a battery pack case; 100-a housing; 101-an accommodation space; 110-a bottom plate; 120-upper cover; 121-a second seal; 130-a fence; 200-beam body; 300-connecting columns; 310-column; 311-fitting holes; 312-fitting grooves; 313-clamping groove; 320-limit part; 330-fitting part; 400-limiting piece; 510—a first connection; 520-a second connection; 600-bottom guard plate; 610-a first seal; 700-connection piece.

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, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

The embodiment of the application provides a battery pack, which can be used for storing electric energy and can be used for conveying the electric energy to electric equipment under the condition that the battery pack is applied to the electric equipment. In this embodiment, the battery pack may improve the technical problem that the reliability of the battery is reduced due to the low strength of the welding part of the hanging point structure in the prior art.

In this embodiment, referring to fig. 1, a battery pack includes a battery pack case 10 and a plurality of battery cells (not shown). The battery pack housing 10 is provided with a plurality of battery cells, each of which is used for storing electric energy and transmitting the electric energy to electric equipment when the electric equipment is connected to the electric equipment. The battery pack housing 10 can provide both load bearing and protection to the plurality of cells. In addition, the battery pack case 10 may be assembled to the electric device, thereby realizing connection of the battery pack to the electric device. It should be noted that, in the present embodiment, the battery pack case 10 can improve the technical problem of the prior art that the low strength of the welding part of the hanging point structure leads to the reduced reliability of the battery; therefore, the battery pack adopting the battery pack shell 10 can achieve the aim of improving the technical problem that the reliability of the battery is reduced due to low strength of the welding part of the hanging point structure in the prior art.

In the present embodiment, referring to fig. 1, 2 and 3 in combination, the battery pack case 10 includes a housing 100, a beam 200, a connection post 300 and a stopper 400. An accommodating space 101 is arranged in the shell 100; a plurality of cells are all assembled in the accommodation space 101. The beam 200 is disposed inside the accommodating space 101 and fixedly connected to the bottom wall of the accommodating space 101. The connecting column 300 comprises a column body 310 and a limiting part 320, wherein the limiting part 320 is convexly arranged on the periphery of one end of the column body 310; the column 310 penetrates through the shell 100 and the beam 200, and the limiting part 320 abuts against the bottom of the shell 100. The limiting member 400 is connected to the column 310, and the limiting member 400 is fixedly connected to a side of the beam 200 away from the bottom wall of the accommodating space 101.

In the case where the connection post 300 and the stopper 400 are assembled to the housing 100, it can be considered that the beam body 200 and the bottom portion of the housing 100 are clamped by the stopper 320 and the stopper 400, and thus the stopper 320 and the stopper 400 can provide the restriction effect in the axial direction thereof to the post 310.

In the above, in this battery pack case 10, under the condition that the connecting post 300 is assembled on the outer shell 100, since the limiting member 400 is connected to the outer periphery of the post 310, and the limiting member 400 abuts against the beam 200, the limiting portion 320 abuts against the bottom of the outer shell 100, and the clamping effect can be provided to the post 310 through the limiting member 400 and the limiting portion 320, so that the connection stability of the post 310 in the battery pack case 10 can be improved, and meanwhile, the welding manner in the prior art is omitted, so that the problem of low overall reliability of the battery caused by insufficient welding strength can be avoided. In addition, the limiting function of the limiting piece 400 and the limiting part 320 in the axial direction of the cylinder 310 can be achieved, so that the pulling force applied to the connecting structures at the two ends of the cylinder 310 in the axial direction can be relieved, and the technical problem that the connecting structures at the two ends of the cylinder 310 are easy to damage can be solved. Therefore, the battery pack case 10 and the battery pack can solve the technical problem that the reliability of the battery is reduced due to the low strength of the welding part of the hanging point structure in the prior art.

Through holes are formed in the beam body 200 and the housing 100, and the column 310 can sequentially pass through the through hole in the bottom of the housing 100, the through hole in the beam body 200 and the through hole in the top of the housing 100 to penetrate the housing 100 and the beam body 200. In the case that the column body 310 penetrates through the housing 100 and the beam body 200, the limiting part 320 is abutted against the bottom of the housing 100, then the limiting part 400 is assembled on the column body 310, and the limiting part 400 is connected with one side of the beam body 200 away from the bottom of the housing 100, so that the fastening and positioning of the column body 310 can be realized.

In this embodiment, the column 310 is provided with a mounting hole 311 along an axis thereof, and the battery pack housing 10 further includes a connector 700, where the connector 700 passes through the mounting hole 311 for connection to electrical equipment. The connection member 700 may be a bolt or a rivet, and the connection member 700 passes through the assembly hole 311 and extends out from the other end of the column 310, so that the connection member 700 is connected to the electric device, and the assembly of the battery pack and the electric device can be realized.

Optionally, in an embodiment, a clamping groove 313 is formed on the outer periphery of the column 310, and the limiting member 400 is embedded in the clamping groove 313. In the case where the column 310 penetrates the beam 200, the catching groove 313 is just exposed to the outside of the beam 200, and in the case where the stopper 400 is caught in the catching groove 313, the stopper 400 may just contact the beam 200. At this time, the limiting member 400 is embedded in the clamping groove 313, and the limiting member 400 abuts against the beam 200, so that the movement of the column 310 in the direction of exiting the housing 100 can be limited; meanwhile, since the stopper 320 is abutted against the bottom of the housing 100, the column 310 can be provided with a restriction in a direction of continuing to move into the housing 100; thus, the position of the cylinder 310 is fixed based on the combined action of the stopper 400 and the stopper 320.

It should be noted that, when the column 310 penetrates into the housing 100 and the beam 200 and exposes the clamping groove 313 from one side of the beam 200 away from the bottom of the housing 100, the limiting member 400 can be directly clamped into the clamping groove 313, so that the assembly difficulty of the limiting member 400 is reduced, and the assembly efficiency can be improved.

Alternatively, after the stopper 400 is installed in the clamping groove 313, the stopper 400 may be fixed to the beam 200 by a screw, rivet, pin, or the like, preventing the stopper 400 from being removed from the clamping groove 313, and further improving the assembly stability of the column 310. Of course, the limiting member 400 may be fixedly connected with the beam 200 by bonding or welding.

It should be appreciated that in other embodiments of the present application, the stop 400 may be coupled to the post 310 in other ways. For example, a threaded hole is formed in the column 310, and the stopper 400 may be fixedly connected to the column 310 through the threaded hole. For another example, the stopper 400 may be connected to the column 310 by welding.

Further, in the present embodiment, two opposite sides of the column 310 are provided with a clamping groove 313; the battery pack case 10 includes two stoppers 400, and the two stoppers 400 are respectively inserted into the two clamping grooves 313. By providing the restraining action to the column 310 from opposite sides of the column 310 by the two restraining members 400, the force balance at both sides of the column 310 can be ensured, and the stability of the column 310 can be ensured. In addition, the two limiting pieces 400 share the born acting force mutually, so that the acting force born by a single limiting piece 400 can be reduced, and the service life of the limiting piece 400 is prolonged.

Of course, in other embodiments, the assembly to opposite sides of the post 310 may be achieved by a single stop 400. For example, the positioning of the stop 400 in a U-shape allows the stop 400 to be attached to opposite sides of the post 310 at the same time. In still other embodiments, the single-sided restraining of the post 310 may be achieved by only one stop 400.

In this embodiment, the stopper 400 is in a sheet shape. In the case that the stopper 400 is caught in the catching groove 313, the stopper 400 is attached to the upper side of the girder body 200, thereby facilitating the improvement of the connection stability between the stopper 400 and the girder body 200. And, the occupation space of the limiting piece 400 in the accommodating space 101 can be reduced, which is beneficial to the whole volume reduction of the battery pack.

Of course, in other embodiments of the present application, the stop 400 may be provided in other shapes. For example, the limiting member 400 is configured in a zigzag shape, such that one end portion of the limiting member 400 is clamped into the clamping groove 313, the middle structure of the limiting member 400 is attached to the periphery of the column 310, and the other end portion is attached to the beam 200 and fixedly connected to the beam 200.

In this embodiment, the housing 100 may be regarded as being composed of the upper cover 120, the enclosure 130, and the bottom plate 110. The upper cover 120 and the bottom plate 110 are respectively connected to two opposite sides of the enclosure portion 130, and jointly enclose the accommodating space 101. Wherein, in the case of assembling the connection column 300, the beam body 200 is connected to the inner side of the bottom plate 110, and the limiting part 320 is abutted to the outer side of the bottom plate 110; that is, the stopper 320 and the stopper 400 commonly clamp the beam 200 and the bottom plate 110.

In addition, referring to fig. 3 and 4 in combination, an assembly groove 312 is further formed at an end of the cylinder 310 where the limiting portion 320 is disposed, the assembly groove 312 is communicated with an assembly hole 311 formed in the cylinder 310, and an inner diameter of the assembly groove 312 is larger than an inner diameter of the assembly hole 311 formed in the cylinder 310. The fitting groove 312 is provided with threads on an inner side wall. The battery pack case 10 further includes a bottom guard plate 600 and a first connection part 510, the first connection part 510 is screw-fitted with the fitting groove 312, and the first connection part 510 and the stopper part 320 commonly clamp the bottom guard plate 600. That is, the bottom guard plate 600 may be clamped together by the first coupling portion 510 and the stopper portion 320, thereby improving the fastening degree of the bottom guard plate 600. It should be noted that, the first connecting portion 510 is provided with a hole for the connecting member 700 to pass through, and the hole passes through the first connecting portion 510.

Optionally, the battery pack case 10 further includes a first sealing member 610, and the first sealing member 610 is pressed between the stopper 320 and the bottom guard 600. The first seal 610 may seal a gap between the bottom guard plate 600 and the stopper 320. The first connection portion 510 is pressed against the bottom guard 600, and simultaneously, the purpose of pressing the first sealing member 610 is achieved, thereby improving sealing performance.

In addition, referring to fig. 4 and 5 in combination, in the present embodiment, an end of the column 310 away from the limiting portion 320 forms a smaller diameter assembly portion 330, and a stepped structure is formed on a side of the column 310 away from the limiting portion 320; the battery pack case 10 further includes a second connection part 520, the second connection part 520 is screw-fitted with the fitting part 330, and the upper cover 120 of the outer case 100 is clamped between the second connection part 520 and the stepped structure of the end of the column body 310.

That is, the column 310 may be divided into a first section structure and a second section structure, which are coaxially disposed, and the second section structure is disposed at an end of the first section structure; the diameter of the first section structure is larger than that of the second section structure, and the limiting part 320 is arranged on the outer side of the end part of the first section structure, which is far away from the second section structure. And the connection part of the first section structure and the second section structure forms a step-shaped structure. The second section forms the fitting 330. In the case where the second connection part 520 is assembled on the column body 310, the second connection part 520 is assembled on the second stage structure, and the second connection part 520 and the end surface of the first stage structure commonly sandwich the upper cover 120.

Optionally, the battery pack case 10 further includes a second sealing member 121, and the second sealing member 121 is pressed between the upper cover 120 and the stepped structure of the end of the column body 310. By providing the second sealing member 121, a gap between the fitting portion 330 and the upper cover 120 can be sealed, improving the sealing performance of the battery pack case 10.

It should be noted that, in the battery pack case 10, the column 310 is firmly connected by setting the limiting member 400, so that the first sealing member 610 and the second sealing member 121 are respectively disposed at two ends of the column 310 to realize sealing, thereby reducing the number of sealing structures and improving the technical problem that the number of sealing points increases to cause the increase of risk points in the prior art.

In addition, because the limiting part 320 and the limiting part 400 are clamped on the beam body 200 and the shell together, an axial limiting effect can be provided for the column body 310, so that the pulling acting force borne by the first connecting part 510 and the second connecting part 520 can be relieved, the threads at the first connecting part 510 and the threads at the second connecting part 520 can be prevented from being damaged easily, the overall assembly stability of the connecting column 300 can be improved, and the stability of the battery pack assembled on electric equipment integrally can be improved.

In summary, in this battery pack case 10, under the condition that the connecting post 300 is assembled on the housing 100, since the limiting member 400 is connected to the outer periphery of the post 310, and the limiting member 400 abuts against the beam 200, the limiting portion 320 abuts against the bottom of the housing 100, and the clamping effect can be provided to the post 310 by the limiting member 400 and the limiting portion 320, so that the connection stability of the post 310 in the battery pack case 10 can be improved, and meanwhile, the welding manner in the prior art is omitted, so that the problem of low overall reliability of the battery caused by insufficient welding strength can be avoided. In addition, the limiting function of the limiting piece 400 and the limiting part 320 in the axial direction of the cylinder 310 can be achieved, so that the pulling force applied to the connecting structures at the two ends of the cylinder 310 in the axial direction can be relieved, and the technical problem that the connecting structures at the two ends of the cylinder 310 are easy to damage can be solved. Therefore, the battery pack case 10 and the battery pack can solve the technical problem that the reliability of the battery is reduced due to the low strength of the welding part of the hanging point structure in the prior art. Further, in the battery pack case 10, the column 310 is firmly connected by means of the limiting member 400, so that the first sealing member 610 and the second sealing member 121 are respectively arranged at two ends of the column 310 to realize sealing, the number of sealing structures is reduced, and the technical problem that the number of sealing points is increased to cause the increase of risk points in the prior art can be solved.

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 (10)

1. A battery pack case, comprising:

a housing having an accommodating space therein;

the beam body is arranged in the accommodating space and is fixedly connected with the bottom wall of the accommodating space;

the connecting column comprises a column body and a limiting part, and the limiting part is convexly arranged on the periphery of one end of the column body; the column penetrates through the shell and the beam body, and the limiting part is propped against the bottom of the shell; the method comprises the steps of,

the limiting piece is connected to the column body, and the limiting piece is fixedly connected with one side, away from the bottom wall of the accommodating space, of the Liang Tiyuan.

2. The battery pack housing as claimed in claim 1, wherein the outer circumference of the cylinder is provided with a clamping groove, and the stopper is embedded in the clamping groove.

3. The battery pack housing of claim 2 wherein said slots are formed in opposite sides of said post; the battery shell body comprises two limiting parts, and the two limiting parts are respectively embedded into the two clamping grooves.

4. The battery pack case according to claim 1, wherein the stopper is in the form of a sheet.

5. The battery pack case according to any one of claims 1 to 4, wherein an assembly groove is further formed in an end portion of the column body where the limit portion is provided, and a thread is formed on an inner side wall of the assembly groove; the battery pack shell further comprises a bottom guard plate and a first connecting portion, the first connecting portion is in threaded fit with the assembly groove, and the first connecting portion and the limiting portion clamp the bottom guard plate together.

6. The battery pack housing of claim 5 further comprising a first seal compressed between the retainer and the bottom guard.

7. The battery pack case according to any one of claims 1 to 4, wherein an end of the column body remote from the stopper portion forms a fitting portion having a smaller diameter, and a stepped structure is formed on a side of the column body remote from the stopper portion; the battery pack shell further comprises a second connecting portion, the second connecting portion is in threaded fit with the assembling portion, and the upper cover of the shell is clamped between the second connecting portion and the stepped structure of the end portion of the column body.

8. The battery pack housing of claim 7 further comprising a second seal compressed between the upper cover and the stepped structure of the post end.

9. The battery pack housing as claimed in any one of claims 1 to 4, wherein the post is provided with a mounting hole along an axis thereof, and the battery pack housing further comprises a connector passing through the mounting hole for connection to electrical equipment.

10. A battery pack comprising the battery pack case according to any one of claims 1 to 9.