CN220086254U - Battery box and battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a battery box, which comprises a bottom plate, side frames, a first supporting beam, a second supporting beam and a connecting piece; the side frames are arranged around the bottom plate in a surrounding manner and form a containing cavity with the bottom plate; the first supporting beam is arranged in the accommodating cavity and extends along a first direction; the second support beam is arranged in the accommodating cavity and extends along a second direction, the second direction is intersected with the first direction, at least part of the side surface of the second support beam, which is close to the side frame, is abutted against the side frame, a notch is formed in the top surface of the second support beam, which is away from the bottom plate, and the end part of the first support beam is positioned in the notch; the connecting piece is fixedly connected with the first supporting beam and the second supporting beam. The first supporting beam and the second supporting beam of the battery box are convenient to install and have strong structural strength.

Description

Battery box and battery device

Technical Field

The disclosure relates to the technical field of batteries, in particular to a battery box and a battery device comprising the battery box.

Background

At present, a first supporting beam and a second supporting beam in a battery box are arranged in an intersecting mode, one of the first supporting beam and the second supporting beam is arranged to be two sections, and the first supporting beam and the second supporting beam are connected with the other section, so that the strength of the connecting structure is not easy to guarantee; and a concave part is arranged on one side of the second supporting beam, which is away from the side frame, and then the first supporting beam is inserted into a fixed structure, so that the connecting structure is inconvenient to install.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure aims to overcome the above-described drawbacks of the related art in that the first and second support beams are inconvenient to install, and provide a battery box in which the first and second support beams are convenient to install, and a battery device including the same.

According to one aspect of the present disclosure, there is provided a battery box including:

a bottom plate;

the side frames are arranged around the bottom plate in a surrounding manner and form a containing cavity with the bottom plate;

the first supporting beam is arranged in the accommodating cavity and extends along a first direction;

the second support beam is arranged in the accommodating cavity, extends along a second direction, is intersected with the first direction, at least part of the side surface of the second support beam, which is close to the side frame, is abutted against the side frame, a notch is formed in the top surface of the second support beam, which is away from the bottom plate, and the end part of the first support beam is positioned in the notch;

and the connecting piece is fixedly connected with the first supporting beam and the second supporting beam.

According to the battery box disclosed by the utility model, on one hand, due to the fact that the second supporting beam is close to at least part of the side face of the side frame and is in butt joint with the side frame, the second supporting beam and the side frame jointly form the supporting structure extending along the second direction, and even if the second supporting beam is provided with a notch on the top face of the bottom plate, the notch has little influence on the strength of the supporting structure, so that the overall strength of the battery box is ensured. On the other hand, the first supporting beam can be directly inserted into the notch from one side of the top surface of the second supporting beam, the end part of the first supporting beam can be positioned in the notch, and the installation of the first supporting beam and the second supporting beam is facilitated relative to the structure that the concave part is formed in one side, deviating from the side frame, of the second supporting beam. In still another aspect, the first supporting beam and the second supporting beam are fixedly connected into a whole through the connecting piece, so that the structural strength of the first supporting beam and the structural strength of the second supporting beam are increased, and the overall structural strength of the battery box is ensured.

According to another aspect of the present disclosure, there is provided a battery device including:

the battery box is the battery box;

the at least two single batteries are arranged in the battery box and are arranged along the first direction.

According to the battery device, on one hand, due to the fact that the second supporting beam is close to at least part of the side face of the side frame and is in butt joint with the side frame, the second supporting beam and the side frame form a supporting structure extending along the second direction together, and even if the second supporting beam is provided with a notch on the top face of the bottom plate, the notch has little influence on the strength of the supporting structure, so that the overall strength of the battery box is guaranteed, and the safety of the battery device is guaranteed. On the other hand, the first supporting beam can be directly inserted into the notch from one side of the top surface of the second supporting beam, the end part of the first supporting beam can be positioned in the notch, and the installation of the first supporting beam and the second supporting beam is facilitated and the installation efficiency of the battery device is improved relative to a structure in which a concave part is formed in one side, deviating from the side frame, of the second supporting beam. In still another aspect, the first supporting beam and the second supporting beam are fixedly connected into a whole through the connecting piece, so that the structural strength of the first supporting beam and the structural strength of the second supporting beam are increased, the overall structural strength of the battery box is ensured, and the safety of the battery device is ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic perspective view of an exemplary embodiment of a battery box of the present disclosure.

Fig. 2 is a schematic structural diagram of the first support beam, the second support beam and the connecting member in fig. 1.

Fig. 3 is a schematic view of another example embodiment of the first support beam, the second support beam, and the connector mating.

Fig. 4 is a schematic perspective view of the connector in fig. 1.

Fig. 5 is a schematic structural view of an example embodiment of a battery device of the present disclosure.

Reference numerals illustrate:

1. a bottom plate; 2. A side frame;

3. a first support beam; 31. A first portion; 32. A second portion;

4. a second support beam; 41. a notch; 41a, through grooves;

5. a connecting piece; 51. a first connection portion; 52. a second connecting portion; 53. a first fixing member; 54. a second fixing member; 55. a recessed portion;

6. welding the connecting part;

10. a battery box; 20. a single battery;

x, a first direction; y, second direction; z, third direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present utility model, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The exemplary embodiment of the present disclosure provides a battery box 10, and referring to fig. 1 to 4, the battery box 10 may include a base plate 1, a side frame 2, a first support beam 3, a second support beam 4, and a connection member 5; the side frames 2 are arranged around the bottom plate 1 in a surrounding manner and form a containing cavity with the bottom plate 1; the first support beam 3 is arranged in the accommodating cavity and extends along a first direction X; the second support beam 4 is arranged in the accommodating cavity and extends along a second direction Y, the second direction Y is intersected with the first direction X, at least part of the side surface of the second support beam 4, which is close to the side frame 2, is abutted against the side frame 2, a notch 41 is formed in the top surface of the second support beam 4, which is far away from the bottom plate 1, and the end part of the first support beam 3 is positioned in the notch 41; the connecting piece 5 is fixedly connected with the first supporting beam 3 and the second supporting beam 4.

According to the battery box 10 and the battery device disclosed by the disclosure, on one hand, due to the fact that at least part of the side surface, close to the side frame 2, of the second supporting beam 4 is abutted to the side frame 2, the second supporting beam 4 and the side frame 2 jointly form the supporting structure extending along the second direction Y, even if the second supporting beam 4 is provided with the notch 41 on the top surface, deviating from the bottom plate 1, of the second supporting beam 4, the notch 41 has little influence on the strength of the supporting structure, so that the overall strength of the battery box 10 is guaranteed, and the safety of the battery device is guaranteed. On the other hand, the first support beam 3 can be directly inserted into the notch 41 from one side of the top surface of the second support beam 4, the end part of the first support beam 3 can be positioned in the notch 41, and the installation of the first support beam 3 and the second support beam 4 is convenient relative to the structure that the groove is formed in one side, deviating from the side frame 2, of the second support beam 4, so that the installation efficiency of the battery device is improved. On the other hand, the first supporting beam 3 and the second supporting beam 4 are fixedly connected into a whole through the connecting piece 5, so that the structural strength of the first supporting beam 3 and the second supporting beam 4 is increased, the overall structural strength of the battery box 10 is ensured, and the safety of the battery device is ensured.

In the present exemplary embodiment, referring to fig. 1, a battery case 10 may include a base plate 1, a protective cover (not shown in the drawings), and a side frame 2, and the base plate 1 and the protective cover may be provided in a rectangular shape. The side frames 2 are arranged around the bottom plate 1 in a surrounding mode, specifically, the side frames 2 are arranged around the bottom plate 1, the side frames 2 are connected end to form a rectangular frame, a protective cover is arranged on the opposite side of the side frames 2, and the protective cover is arranged opposite to the bottom plate 1. The bottom plate 1, the protective cover and the side frames 2 surround a receiving chamber forming a battery case 10.

Of course, in other example embodiments of the present disclosure, the base plate 1 and the protective cover may be provided in a circular shape, an oval shape, a trapezoid shape, etc., and the side frames 2 may be provided in one or more shapes and surround-formed in a circular shape, an oval shape, a trapezoid shape, etc., such that the battery case 10 is formed in a cylindrical shape, an oval cylindrical shape, a prismatic shape, etc. Other shapes of the battery case 10 may be used, and will not be described in detail herein. Further, the battery box 10 may not include a protective cover, and for example, in the case where a plurality of battery devices are stacked one above another, the battery device located below may not be provided with a protective cover, and only the battery device located uppermost may be provided with a protective cover, and the bottom plate 1 of the upper battery device may serve as the protective cover of the lower battery device.

In the present exemplary embodiment, a first support beam 3 and a second support beam 4 are provided in the accommodation chamber, the first support beam 3 extending in a first direction X, the second support beam 4 extending in a second direction Y intersecting the first direction X, specifically, the second direction Y being perpendicular to the first direction X. The housing space can be divided by the first support beam 3 into at least two sub-housing spaces, in one of which a battery is arranged.

The first support beam 3 and the second support beam 4 are both provided with a hollow structure, i.e. the first support beam 3 has a cavity, which extends in a first direction X; the second support beam 4 also has a cavity extending in the second direction Y; the weight of the first support beam 3 and the second support beam 4 is made lighter to increase the energy density of the battery device; but also the structural strength of the first support beam 3 and the second support beam 4 can be ensured to ensure the overall structural strength of the battery case 10.

The second support beam 4 may be disposed close to the side frame 2, and at least a portion of the side surface of the second support beam 4 close to the side frame 2 may be in contact with the side frame 2, for example, all of the side surface of the second support beam 4 close to the side frame 2 may be in contact with the side frame 2, or a portion of the side surface of the second support beam 4 close to the side frame 2 may be in contact with the side frame 2, so that the second support beam 4 and the side frame 2 together form a support structure extending in the second direction Y, so that the strength of the support structure is high.

"abutting" emphasizes the existence of a force between the two, as compared to "connected"; that is, "abutting" represents a state in which a force exists between the second support beam 4 and the side frame 2.

In this exemplary embodiment, referring to fig. 3, a notch 41 is provided on the top surface of the second support beam 4 facing away from the bottom plate 1, and the notch 41 is provided toward the first support beam 3, so that the notch 41 has two first openings and second openings with different orientations, and the first openings and the second openings are communicated, the first openings are provided facing away from the bottom plate 1, and the second openings are provided toward the first support beam 3, so that the first support beam 3 can be directly inserted into the notch 41 from the top surface side of the second support beam 4, and the end portion of the first support beam 3 can be located in the notch 41, so that the installation of the first support beam 3 and the second support beam 4 is facilitated with respect to the structure in which the recess is provided on the side of the second support beam 4 facing away from the side frame 2, specifically, the second support beam 4 can be installed in the accommodating cavity first, then the first support beam 3 can be directly inserted into the notch 41 from the top surface side of the second support beam 4, and the first support beam 3 and the second support beam 4 are fixedly connected by the connecting member 5. The structure of the concave part is arranged on the side, deviating from the side frame 2, of the second support beam 4, the first support beam 3 and the second support beam 4 are fixedly connected and then are integrally installed in the accommodating cavity, and the first support beam 3 and the second support beam 4 are large in structure and not easy to move, and deformation is easy to occur in the moving process.

Moreover, since at least a portion of the side surface of the second support beam 4, which is close to the side frame 2, is abutted against the side frame 2, the second support beam 4 and the side frame 2 together form a support structure extending in the second direction Y, so that even if the second support beam 4 is provided with the notch 41, the strength of the support structure is not greatly affected to ensure the strength of the whole battery case 10.

The first supporting beam 3 of connecting piece 5 fixed connection and the second supporting beam 4 make first supporting beam 3 and the second supporting beam 4 fixed connection as an organic whole through connecting piece 5, have increased the structural strength of first supporting beam 3 and second supporting beam 4 to guarantee the holistic structural strength of battery box 10.

Further, referring to fig. 2, the notch 41 may be a through groove 41a penetrating the second support beam 4 in the first direction X. The two ends without the closed grooves may be referred to as through grooves 41a. The through groove 41a penetrates the second support beam 4 in the first direction X such that both ends of the through groove 41a in the first direction X are not closed. The formation of the through groove 41a is relatively simple with respect to the formation of the notch 41, thereby facilitating the preparation of the second support beam 4. Moreover, the through grooves 41a allow the end surface of the first support beam 3 perpendicular to the first direction X and the side surface of the second support beam 4 near the side frame 2 to be substantially coplanar, and the overlap length between the first support beam 3 and the second support beam 4 is longer, further increasing the connection strength between the first support beam 3 and the second support beam 4.

In the present exemplary embodiment, referring to fig. 2 to 4, the connection member 5 may include a first connection portion 51 and a second connection portion 52. The first connecting portion 51 is inserted into the cavity of the first support beam 3, and the first connecting portion 51 is fixedly connected with the first support beam 3. The second connection portion 52 is connected to the first connection portion 51, and the second connection portion 52 is fixed to the second support beam 4.

Referring to fig. 3, in the case where the notch 41 is provided in the second support beam 4, a through hole may be provided in the top surface of the first support beam 3 facing away from the bottom plate 1, the through hole being communicated to the cavity of the first support beam 3, through which the first connection portion 51 is inserted into the cavity of the first support beam 3, and the first connection portion 51 is inserted into the cavity of the first support beam 3 in the third direction Z. The first connecting portion 51 may be provided in a block shape adapted to the cavity of the first support beam 3. The second connection part 52 is connected to a side of the first connection part 51 facing away from the first support beam 3, and the second connection part 52 is located on top surfaces of the first support beam 3 and the second support beam 4, and the second connection part 52 is provided in a plate shape.

In this case, the connection member 5 may further include a second fixing member 54, and the second fixing member 54 is fixedly connected to the second support beam 4 and the second connection portion 52. The second fixing member 54 may be a bolt, a screw, a rivet, or the like. Since the two side surfaces of the first support beam 3 in the second direction Y are abutted against the two side surfaces of the notch 41 in the second direction Y, the first support beam 3 is limited in the second direction Y. At least one end face of the first support beam 3 in the first direction X abuts against an end face of the at least one notch 41 in the first direction X, i.e. limiting of at least one end of the first support beam 3 in the first direction X is achieved. The limitation of the first support beam 3 in the third direction Z can be achieved by the second fixing piece 54 and the second connecting portion 52. The third direction Z is perpendicular to both the first direction X and the second direction Y.

Referring to fig. 2 and 4, in the case where the notch 41 is provided to penetrate the through groove 41a of the second support beam 4 in the first direction X, since the end of the first support beam 3 is not shielded by the second support beam 4, the end of the cavity of the first support beam 3 is exposed, and the first connection portion 51 is inserted into the cavity of the first support beam 3 through the end of the first support beam 3, that is, the first connection portion 51 is inserted into the cavity of the first support beam 3 in the first direction X. The first connecting portion 51 may be provided in a block shape adapted to the cavity of the first support beam 3. The second connecting portion 52 is connected to a side of the first connecting portion 51 facing away from the receiving cavity, i.e., the second connecting portion 52 is located on a side of the first support beam 3 and the second support beam 4 facing away from the receiving cavity, and the second connecting portion 52 is configured in a plate shape.

In this case, the connection member 5 may further include a first fixing member 53 and a second fixing member 54, the first fixing member 53 being fixedly connected to the first support beam 3 and the first connection portion 51; specifically, the first fixing member 53 penetrates through a through hole at the top of the first support beam 3, and is screw-fitted into a screw hole on the first connection portion 51. The second fixing member 54 is fixedly connected to the second support beam 4 and the second connecting portion 52, specifically, the second fixing member 54 penetrates through a through hole in the second connecting portion 52 and is screwed into a threaded hole on a side of the second support beam 4 near the side frame 2. The first fixing member 53 may be a bolt, a screw, a rivet, or the like.

Since both side surfaces of the first support beam 3 in the second direction Y are abutted against both side surfaces of the through groove 41a in the second direction Y, the first support beam 3 is restrained in the second direction Y. At least one end face of the first support beam 3 in the first direction X abuts against the second connecting portion 52, i.e., limiting of at least one end of the first support beam 3 is achieved in the first direction X. Limiting the first support beam 3 in the third direction Z can be achieved by the first connection 51 and the first fixing piece 53.

Of course, in other example implementations of the present disclosure, the first fixing member 53 may not be provided, and the first support beam 3 may be limited in the third direction Z only by inserting the first connecting portion 51 into the cavity of the first support beam 3.

The first connecting part 51 of the connecting piece 5 is inserted into the cavity of the first supporting beam 3, so that the first connecting part 51 does not need to occupy the space in the battery box 10 additionally, and the space utilization rate of the battery box 10 is improved.

Of course, in other example embodiments of the present disclosure, the first connection portion 51 may be provided in a plate shape, and the first connection portion 51 may be provided at a side of the first support beam 3 facing away from the floor plate 11.

Referring to fig. 4, the first connection part 51 of the connection member 5 is provided in a block shape, and the recess 55 is provided on the first connection part 51, specifically, the recess 55 may be provided at portions of the first connection part 51 where the screw hole is not required, and the weight of the first connection part 51 may be reduced by the recess 55, thereby reducing the weight of the connection member 5 to increase the energy density of the battery device.

Referring to fig. 1, the battery case 10 may further include a welding connection portion 6, and the welding connection portion 6 is connected to the first support beam 3 and the side wall of the notch 41. That is, the first support beam 3 and the second support beam 4 are fixedly connected by welding, and specifically, the welding connection portion 6 may be formed by butt welding; the strength of the connection between the first support beam 3 and the second support beam 4 can be further increased by welding the connection portion 6.

The welded connection 6 may be provided as a semi-surrounding structure around the notch 41.

In the case where the notch 41 is provided so as to penetrate the through groove 41a of the second support beam 4 in the first direction X, the number of the welding connection portions 6 may be two, and the two welding connection portions 6 may be provided on opposite sides of the second direction Y of the first support beam 3.

Referring to fig. 1, in the third direction Z, the height of the second support beam 4 is smaller than the height of the side frame 2, specifically, the ratio of the height of the second support beam 4 to the height of the side frame 2 is 0.6 or more and 0.8 or less, for example, the ratio of the height of the second support beam 4 to the height of the side frame 2 may be 0.63, 0.65, 0.68, 0.7, 0.72, 0.75, 0.77, or the like. The third direction Z is perpendicular to both the first direction X and the second direction Y.

If the ratio of the height of the second support beam 4 to the height of the side frame 2 is too large, the height of the second support beam 4 is too high, and the side frame 2 needs to be fixedly connected with the protective cover, so that the second support beam 4 with too high height can interfere with the protective cover to affect the fixed connection between the side frame 2 and the protective cover.

If the ratio of the height of the second support beam 4 to the height of the side frames 2 is too small, so that the height of the second support beam 4 is too low, the strength of the second support beam 4 is too low, and the strength requirement of the battery case 10 cannot be satisfied.

The ratio range not only ensures that the second support beam 4 cannot interfere with the protective cover and the fixed connection of the side frame 2 and the protective cover cannot be influenced; and the strength of the second support beam 4 is sufficient to meet the strength requirement of the battery box 10.

Referring to fig. 1, the first support beam 3 may include a first portion 31 and a second portion 32; the first portion 31 and the second portion 32 each extend in the first direction X, and one end of the second portion 32 is connected to the first portion 31. At least part of the second portion 32 is located within the notch 41; for example, it is possible that the second portion 32 is entirely located within the notch 41, or that a portion of the second portion 32 facing away from the first portion 31 is located within the notch 41.

In the third direction Z, the height of the first portion 31 is greater than the height of the second portion 32, i.e., the height of the first portion 31 is set higher, so that the side of the first portion 31 facing away from the bottom plate 1 is higher than the side of the second portion 32 facing away from the bottom plate 1, to ensure the structural strength of the first support beam 3, thereby ensuring the structural strength of the battery box 10.

Further, since the second portion 32 is close to the first support beam 3, the excessively high second portion 32 may interfere with the protective cover, affecting the fixed connection between the side frame 2 and the protective cover, and thus, the surface of the second portion 32 facing away from the bottom plate 1 is substantially coplanar with the surface of the second support beam 4 facing away from the bottom plate 1, i.e. the height of the second portion 32 is substantially the same as the height of the second support beam 4. The first support beam 3 is prevented from interfering with the protective cover, and the first support beam 3 is prevented from affecting the fixed connection between the side frame 2 and the protective cover; but also the structural strength of the second portion 32 and thus the structural strength of the first support beam 3.

It should be noted that the coplanarity is not limited to the coplanarity in the strict sense, and may be a certain error, that is, a certain step difference between two surfaces. The error range is different according to the equipment and the preparation process, and therefore, the error ranges of the equipment and the preparation process are all considered to be coplanar.

Of course, in some example embodiments of the present disclosure, the side of the second portion 32 facing away from the floor 1 may be slightly higher than the side of the second support beam 4 facing away from the floor 1, or the side of the second portion 32 facing away from the floor 1 may be slightly lower than the side of the second support beam 4 facing away from the floor 1.

In the first direction X, the ratio of the length of the second portion 32 to the length of the first portion 31 is 0.04 or more and 0.2 or less, for example, the ratio of the length of the second portion 32 to the length of the first portion 31 may be 0.07, 0.1, 0.13, 0.15, 0.18, or the like.

If the ratio of the length of the second portion 32 to the length of the first portion 31 is too large, the length of the second portion 32 is too long, and the structural strength of the first support beam 3 is reduced, so that the first support beam 3 cannot meet the structural strength requirement of the battery box 10.

If the ratio of the length of the second portion 32 to the length of the first portion 31 is too small, such that the length of the second portion 32 is too short, the first support beam 3 still interferes with the protective cover, such that the first support beam 3 affects the fixed connection of the side frame 2 and the protective cover;

the above ratio range not only ensures the structural strength of the first support beam 3, but also ensures the structural strength of the battery box 10; and the first support beam 3 is ensured not to interfere with the protective cover and not to affect the fixed connection of the side frame 2 and the protective cover.

Based on the same inventive concept, the exemplary embodiments of the present disclosure provide a battery device, referring to fig. 5, which may include a battery case 10 and a unit cell 20, the battery case 10 being the battery case 10 described in any one of the above; the specific structure of the battery case 10 has been described in detail above, and thus, will not be described here again. The single battery 20 is arranged in at least two, the single battery 20 is arranged in the battery box 10, at least two single batteries 20 are arranged along the first direction, and the second supporting beam is abutted to one side of the single battery 20 in the arrangement direction, so that the single battery 20, the second supporting beam and the side frames are abutted at one time.

The "parallel" and "perpendicular" mentioned in the present utility model may be not only completely parallel and perpendicular, but also may have a certain error; for example, the included angle between the two is greater than or equal to 0 ° and less than or equal to 5 °, i.e. the two are considered to be parallel to each other; the included angle between the two is more than or equal to 85 degrees and less than or equal to 95 degrees, namely the two are considered to be mutually perpendicular.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (11)

1. A battery box, comprising:

a bottom plate;

the side frames are arranged around the bottom plate in a surrounding mode and form a containing cavity with the bottom plate;

the first supporting beam is arranged in the accommodating cavity and extends along a first direction;

the second support beam is arranged in the accommodating cavity and extends along a second direction, the second direction is intersected with the first direction, at least part of the side surface of the second support beam, which is close to the side frame, is abutted against the side frame, a notch is formed in the top surface of the second support beam, which is away from the bottom plate, and the end part of the first support beam is positioned in the notch;

the connecting piece is fixedly connected with the first supporting beam and the second supporting beam.

2. The battery box of claim 1, wherein the notch is a through slot extending through the second support beam in the first direction.

3. The battery box of claim 1, wherein the connector comprises:

the first connecting part is inserted into the cavity of the first supporting beam and is fixedly connected with the first supporting beam;

the second connecting part is connected with the first connecting part and is fixed on the second supporting beam.

4. The battery box of claim 3, wherein the notch is a through slot penetrating the second support beam in the first direction, the first connecting portion is inserted into the cavity of the first support beam in the first direction, and the second connecting portion is fixed to a side of the second support beam near the side frame.

5. A battery box according to claim 3, wherein the connector further comprises:

the first fixing piece is fixedly connected with the first supporting beam and the first connecting part; and/or

And the second fixing piece is fixedly connected with the second supporting beam and the second connecting part.

6. The battery box of claim 1, further comprising:

and the welding connection part is connected with the first supporting beam and the side wall of the notch.

7. The battery box according to any one of claims 1 to 6, wherein a ratio of a height of the second support beam to a height of the side frame in a third direction, the third direction being perpendicular to both the first direction and the second direction, is 0.6 or more and 0.8 or less.

8. The battery box of any one of claims 1 to 6, wherein the first support beam includes:

a first portion;

a second portion, one end of the second portion is connected to the first portion, and at least part of the second portion is located in the notch; in a third direction, the height of the first portion is greater than the height of the second portion.

9. The battery box of claim 8, wherein a face of the second portion facing away from the floor is coplanar with a face of the second support beam facing away from the floor.

10. The battery box of claim 8, wherein a ratio of a length of the second portion to a length of the first portion in the first direction is 0.04 or more and 0.2 or less.

11. A battery device, characterized by comprising:

a battery box according to any one of claims 1 to 10;

at least two single batteries are arranged in the battery box, and the at least two single batteries are arranged along a first direction.