CN219759858U - Battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device which comprises a box body and a battery pack; the box body comprises a bottom plate and a structural beam; the battery pack is arranged in the box body and comprises a supporting plate, single batteries and a reinforcing plate, the supporting plate is arranged opposite to the bottom plate, the single batteries are positioned on one side, away from the bottom plate, of the supporting plate, and the reinforcing plate is positioned on one side, away from the bottom plate, of the single batteries; the reinforcing plate is provided with first connecting portion, and the backup pad is provided with second connecting portion, and first connecting portion and second connecting portion are located the group battery be close to one side of structure roof beam, and with structure roof beam is connected. Through all set up connecting portion on backup pad and reinforcing plate, can all be fixed backup pad and reinforcing plate with the structural beam to can promote the fixed strength of group battery.

Description

Battery device

Technical Field

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

Background

Currently, new energy electric vehicles are increasingly receiving social attention, and have become the development direction of future automobiles. The battery device is an important component in the electric automobile, and the design optimization of the battery device becomes an important item for the development of the electric automobile.

However, the battery pack in the current battery device is not firmly fixed, and the battery pack is easy to fall off or damage in the process of transportation or use.

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 disadvantage of weak fixation of a battery pack in the battery device of the related art, and provide a battery device with firm fixation of the battery pack.

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

the box body comprises a bottom plate and a structural beam;

the battery pack is arranged in the box body and comprises a supporting plate, single batteries and a reinforcing plate, the supporting plate is arranged opposite to the bottom plate, the single batteries are positioned on one side, away from the bottom plate, of the supporting plate, and the reinforcing plate is positioned on one side, away from the bottom plate, of the single batteries; the reinforcing plate is provided with a first connecting portion, the supporting plate is provided with a second connecting portion, and the first connecting portion and the second connecting portion are located on one side, close to the structural beam, of the battery pack and are connected with the structural beam.

The battery device of the present disclosure can limit the single battery by utilizing the supporting plate and the reinforcing plate, so as to fix the single battery. And, this disclosure is provided with the third connecting portion on the reinforcing plate, is provided with the fourth connecting portion in the backup pad, and third connecting portion and fourth connecting portion are connected with the structural beam respectively. So set up, can all be connected and fixed backup pad and reinforcing plate with the structural beam to can improve the fixed strength of backup pad and reinforcing plate, because backup pad and reinforcing plate carry out spacingly and fixedly to the battery cell simultaneously, just also can improve the fixed stability of battery cell.

From this, can show the fixed strength who promotes the group battery through above-mentioned setting for group battery is connected more firm with the structural beam, prevents that the group battery from taking place the problem that drops at the in-process of transportation and use of battery device, just also can reduce the security risk of battery device.

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 structural view of an exemplary embodiment of a battery device of the present disclosure.

Fig. 2 is a partial schematic structure view of an exemplary embodiment of a battery device of the present disclosure.

Fig. 3 is a partial schematic structure view of another exemplary embodiment of a battery device of the present disclosure.

Fig. 4 is a partial schematic structural view of still another example embodiment of a battery device of the present disclosure.

Fig. 5 is a schematic structural view of an exemplary embodiment of a battery cell of the present disclosure.

Reference numerals illustrate:

10. a case; 11. a bottom plate; 12. a structural beam; 121. a first mounting groove; 122. a second mounting groove; 13. a side plate;

20. a battery pack; 21. a support plate; 211. a second connecting portion; 212. a second connecting plate; 22. a single battery; 23. a reinforcing plate; 231. a first connection portion; 232. a first connection plate; 24. a battery case; 241. a first surface; 242. a second surface; 243. and a third surface.

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 present disclosure provides a battery device, which includes a case 10 and a battery pack 20, as shown with reference to fig. 1 to 5; the box 10 comprises a bottom plate 11 and a structural beam 12; the battery pack 20 is arranged in the box body 10, the battery pack 20 comprises a supporting plate 21, single batteries 22 and a reinforcing plate 23, the supporting plate 21 is arranged opposite to the bottom plate 11, the single batteries 22 are positioned on one side of the supporting plate 21, which is away from the bottom plate 11, and the reinforcing plate 23 is positioned on one side of the single batteries 22, which is away from the bottom plate 11; the reinforcing plate 23 is provided with a first connection part 231, the support plate 21 is provided with a second connection part 211, and the first connection part 231 and the second connection part 211 are positioned at one side of the battery pack 20 near the structural beam 12 and are connected with the structural beam 12.

The battery device of the present disclosure can limit the single battery 22 by using the support plate 21 and the reinforcing plate 23 to fix the single battery 22. The present disclosure also provides a third connection portion to the reinforcing plate 23, and a fourth connection portion to the support plate 21, and the third connection portion and the fourth connection portion are connected to the structural beam 12, respectively. So set up, can all be connected and fixed backup pad 21 and reinforcing plate 23 with structural beam 12 to can improve backup pad 21 and reinforcing plate 23's fixed strength, because backup pad 21 and reinforcing plate 23 carry out spacing and fixed to battery cell 22 simultaneously, just also can improve battery cell 22's fixed stability.

Therefore, the fixing strength of the battery pack 20 can be remarkably improved through the arrangement, so that the battery pack 20 is connected with the structural beam 12 more firmly, the problem that the battery pack 20 falls off in the process of transportation and use of the battery device is prevented, and the safety risk of the battery device can be reduced.

It should be noted that, since the support plate 21 is located on the side of the unit cell 22 near the bottom plate 11, and the reinforcement plate 23 is located on the side of the unit cell 22 away from the bottom plate 11, the second connection portion 211 on the support plate 21 and the first connection portion 231 on the reinforcement plate 23 are spaced apart in the direction in which the support plate 21 points toward the reinforcement plate 23.

In one embodiment of the present disclosure, the first connection portion 231 and the structural beam 12 may be connected by a connection member to reduce the difficulty of connection between the first connection portion 231 and the structural beam 12. The types of connectors include, but are not limited to, screws or bolts, etc. However, it is not limited thereto, and the first connection portion 231 and the structural beam 12 may be connected by welding, riveting, or the like, which is within the scope of the present disclosure.

The second connection portion 211 and the structural beam 12 may also be connected by a connection member, so as to reduce the connection difficulty of the second connection portion 211 and the structural beam 12. However, it is not limited thereto, and the second connection portion 211 and the structural beam 12 may be connected by welding, riveting, or the like, which is within the scope of the present disclosure.

In one embodiment, the first connection parts 231 and the second connection parts 211 are connected with the structural beams 12 in the same manner to simplify the connection difficulty and connection steps of the battery pack 20 with the structural beams 12.

In one embodiment, the orthographic projection of the first connection 231 on the structural beam 12 and the orthographic projection of the second connection 211 on the structural beam 12 at most overlap. I.e. it can be understood that: the connection of the first connection portion 231 and the structural beam 12 and the connection of the second connection portion 211 and the structural beam 12 are offset from each other.

Since there is a large load-bearing force at both the connection of the first connection portion 231 and the structural beam 12 and the connection of the second connection portion 211 and the structural beam 12. Therefore, the connection between the first connection part 231 and the structural beam 12 and the connection between the second connection part 211 and the structural beam 12 are offset from each other, so that the bearing capacity of the connection between the first connection part 231 and the structural beam 12 and the bearing capacity of the connection between the second connection part 211 and the structural beam 12 are prevented from being located at the same position of the structural beam 12, and the problem of bearing capacity superposition at the same position of the structural beam 12 can be prevented, thereby preventing the structural beam 12 from being damaged, ensuring higher fixing strength between the battery pack 20 and the structural beam 12, and ensuring the fixing stability of the battery pack 20.

In one embodiment, referring to fig. 1 to 4, the orthographic projection of the first connection portion 231 on the structural beam 12 and the orthographic projection of the second connection portion 211 on the structural beam 12 may be adjacent, that is: the front projection of the first connection portion 231 on the structural beam 12 does not overlap with the front projection of the second connection portion 211 on the structural beam 12. So set up, can make the junction of first connecting portion 231 and structure roof beam 12 keep away from the junction of second connecting portion 211 and structure roof beam 12 to further avoid the bearing capacity of the junction of first connecting portion 231 and structure roof beam 12 and the bearing capacity of the junction of second connecting portion 211 and structure roof beam 12 to lie in the same position of structure roof beam 12, just also can further prevent taking place bearing capacity superimposed problem in the same position department of structure roof beam 12, thereby can further prevent that structure roof beam 12 from taking place to damage, further guarantee to have higher fixed strength between group battery 20 and the structure roof beam 12, guarantee the fixed stability of group battery 20.

In one embodiment, the first connection part 231 may be a first connection plate 232, and the first connection plate 232 may be connected with the reinforcement plate 23 and may extend in a direction away from the unit cells 22. The first connection plate 232 may be connected to a side of the structural beam 12 facing away from the base plate 11. So set up, because the first connecting plate 232 is great with the one side area of contact that the structure roof beam 12 deviates from the bottom plate 11 to this increases the connection area between first connecting portion 231 and the structure roof beam 12, has improved the fixed strength between first connecting portion 231 and the structure roof beam 12.

In the present embodiment, the second connection portion 211 may be a second connection plate 212, and the second connection plate 212 may be connected with the support plate 21 and extend in a direction away from the unit cells 22. The side of the structural beam 12 facing away from the bottom plate 11 may be provided with a second mounting groove 122, and the second connection plate 212 may be located at the bottom of the second mounting groove 122 and connected to the bottom surface of the second mounting groove 122.

So set up, can make the opening of second mounting groove 122 lie in the structure roof beam 12 and deviate from the one side of bottom plate 11 to when the bottom of second connecting plate 212 and second mounting groove 122 is connected, the operation can be connected from the one side that structure roof beam 12 deviates from bottom plate 11, can not receive the interference of bottom plate 11 or other box 10 structures, can be convenient for the operation of being connected from this.

Meanwhile, since the first connecting plate 232 is also located at one side of the structural beam 12 away from the bottom plate 11, an operator can realize connection between the first connecting plate 232 and the structural beam 12 and connection between the second connecting plate 212 and the structural beam 12 from one side of the structural beam 12 away from the bottom plate 11, so that the operation difficulty of the operator can be further reduced, and the manufacturing efficiency of the battery device is improved.

In one embodiment, referring to fig. 3, the side of the structural beam 12 facing away from the floor 11 is provided with a first mounting slot 121. The first connection plate 232 may be located in the first mounting groove 121, and the first connection plate 232 may be connected with the bottom surface of the first mounting groove 121. By providing the first mounting groove 121, a mounting space can be provided for the first connection plate 232, so that the first connection plate 232 is more firmly connected with the structural beam 12.

The depth of the first mounting groove 121 may be smaller than the depth of the second mounting groove 122. Since the first connection portion 231 and the second connection portion 211 have a space in the direction in which the support plate 21 points to the reinforcing plate 23, the first connection plate 232 and the second connection plate 212 have a space in the direction in which the support plate 21 points to the reinforcing plate 23, the first installation groove 121 can be made to correspond to the position of the first connection plate 232 and the second installation groove 122 can be made to correspond to the position of the second connection plate 212 by the above arrangement, so that the installation of the first connection plate 232 and the second connection plate 212 can be facilitated.

In one embodiment, the difference between the depth of the second mounting groove 122 and the depth of the first mounting groove 121 is the same as the interval between the first connection part 231 and the second connection part 211, so that the positions of the first mounting groove 121 and the first connection plate 232 and the positions of the second mounting groove 122 and the second connection plate 212 can be more precisely corresponding, and the mounting accuracy of the first connection plate 232 and the second connection plate 212 can be improved.

In one embodiment, the forward projected area of the first connection plate 232 on the structural beam 12 and the forward projected area of the second connection plate 212 on the structural beam 12 may be the same, and the forward projected area of the first mounting groove 121 on the structural beam 12 and the forward projected area of the second mounting groove 122 on the structural beam 12 may be the same. By the arrangement, the fixing strength between the first connecting plate 232 and the structural beam 12 is the same as the fixing strength between the second connecting plate 212 and the structural beam 12, and the stress when the structural beam 12 is connected with the first connecting plate 232 and the second connecting plate 212 is the same, so that the structural beam 12 is prevented from being damaged due to uneven stress, and the fixing stability of the battery pack 20 is further ensured.

In another embodiment of the present disclosure, referring to fig. 4, the structural beam 12 may also be located between the first connection portion 231 and the second connection portion 211, and the first connection portion 231 may be connected to a side of the structural beam 12 facing away from the bottom plate 11, and the second connection portion 211 may be connected to a side of the structural beam 12 facing close to the bottom plate 11. So set up, also can all be connected and fixed backup pad 21 and reinforcing plate 23 with the structural beam 12 equally to can improve backup pad 21 and reinforcing plate 23's fixed strength, promote the fixed strength of group battery 20, make group battery 20 and structural beam 12 be connected more firm, prevent that the battery device from taking place the problem that drops at the in-process of transportation and use from appearing group battery 20.

In addition, when the structural beam 12 is located between the first connection part 231 and the second connection part 211, the first connection part 231 and the second connection part 211 can apply the same-direction bearing force to the opposite surfaces of the structural beam 12, respectively, so that the connection between the structural beam 12 and the battery pack 20 can be made more firm than the scheme of "the first connection part 231 and the second connection part 211 apply the same-direction bearing force to the same surface of the structural beam 12" in the previous embodiment.

In this embodiment, the first connection portion 231 may be the first connection plate 232, and the second connection portion 211 may be the second connection plate 212. The first connection plate 232 may be connected to a side of the structural beam 12 facing away from the base plate 11, and the second connection plate 212 may be connected to a side of the structural beam 12 adjacent to the base plate 11.

In this embodiment, a side of the structural beam 12 facing away from the bottom plate 11 may be provided with a first mounting groove 121, the first connection plate 232 may be located in the first mounting groove 121, a side of the structural beam 12 facing toward the bottom plate 11 may be provided with a second mounting groove 122, and the second connection plate 212 may be located in the second mounting groove 122. By doing so, the fixing connection strength between the first connection plate 232 and the second connection plate 212 and the structural beam 12 can be improved.

In one embodiment of the present disclosure, referring to fig. 1 to 4, the first connection parts 231 may be provided in plurality, and the plurality of first connection parts 231 may be disposed at intervals, so that the connection area of the reinforcing plate 23 and the structural beam 12 may be increased, and the connection strength between the reinforcing plate 23 and the structural beam 12 may be increased, thereby making the fixing strength between the battery pack 20 and the structural beam 12 higher.

The second connection parts 211 may be provided in plurality, and the second connection parts 211 may be provided at intervals, so that the connection area between the support plate 21 and the structural beam 12 may be increased, and the connection strength between the support plate 21 and the structural beam 12 may be increased, thereby further improving the fixing strength between the battery pack 20 and the structural beam 12.

In one embodiment, the number of the first connection parts 231 and the number of the second connection parts 211 may be the same, so that the connection area of the reinforcing plate 23 and the structural beam 12 and the connection area of the support plate 21 and the structural beam 12 are the same, and the structural beam 12 is uniformly stressed.

In one embodiment, the interval between the adjacent two first connection parts 231 and the interval between the adjacent two second connection parts 211 may be the same. By the arrangement, the structural beam 12 can be further ensured to be uniformly stressed, and the fixing stability between the battery pack 20 and the structural beam 12 is further improved.

In one embodiment of the present disclosure, referring to fig. 5, the battery cell 22 may include: battery housing 24 and battery cells. The battery cell is a unit formed by winding or laminating a stacking part, and the stacking part comprises a first electrode, a separator and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode are interchangeable. The cells may be disposed within the battery housing 24.

The battery case 24 may be substantially rectangular parallelepiped, and may include two first surfaces 241 disposed opposite to each other, two second surfaces 242 disposed opposite to each other, and two third surfaces 243 disposed opposite to each other, wherein one of the second surfaces 242 may be disposed opposite to the bottom plate 11, and the third surfaces 243 may be disposed opposite to the structural beam 12. The area of the first surface 241 may be greater than the area of the second surface 242, and the area of the second surface 242 may be greater than the area of the third surface 243. With this structure of the battery case 24, the space utilization of the battery device can be further improved, and the energy density of the battery device can be further improved.

In one embodiment, the two first surfaces 241, the two second surfaces 242, and the two third surfaces 243 may enclose a receptacle, and the cells may be located within the receptacle, thereby enabling reliable sealing of the cells. Both ends of the battery cell in the length direction may have a gap with the inner wall of the third surface 243.

The material of the battery case 24 may be a metal material, for example: steel, aluminum, etc. The battery housing 24 may be of an integrally formed construction, namely: the two first surfaces 241, the two second surfaces 242 and the two third surfaces 243 can be integrally manufactured, so that the connection position of the battery case 24 can be reduced while the greater structural strength of the battery case 24 is ensured, the possibility of cracking at the connection position can be reduced, and the metal case can be ensured to have better tightness to the battery cell. But is not limited thereto, the battery case 24 may be a separate structure, which is also within the scope of the present disclosure.

In one embodiment, referring to fig. 1 to 5, the battery pack 20 may include a plurality of unit cells 22, with first surfaces 241 of adjacent two unit cells 22 disposed opposite to each other. By the arrangement, the space in the box body 10 can be saved, the space utilization rate of the box body 10 can be improved, and the energy density of the battery device can be improved.

In one embodiment, the structural beams 12 may have two, two structural beams 12 may be disposed opposite to the two third surfaces 243, the reinforcing plate 23 is disposed near both sides of the two third surfaces 243 with the first connection parts 231, and the support plate 21 is disposed near both sides of the two third surfaces 243 with the second connection parts 211. By this arrangement, the reinforcing plate 23 and the support plate 21 can be simultaneously connected to the two structural beams 12, so that the fixing strength of the battery pack 20 to the structural beams 12 can be further improved.

In one embodiment of the disclosure, the case 10 may further include a side plate 13 and a protective cover, the bottom plate 11 and the protective cover may be rectangular, four side plates 13 are disposed around the bottom plate 11, the four side plates 13 are connected end to form a rectangular ring, and the protective cover is disposed on the other side of the four side plates 13, and the protective cover and the bottom plate 11 may be disposed opposite to each other. The bottom plate 11, the protective cover and the four side plates 13 surround to form an accommodation space in which the structural beams 12 and the battery pack 20 are located, and the structural beams 12 may be fixedly connected with the bottom plate 11 and/or the side plates 13.

Of course, in other example embodiments of the present disclosure, the bottom plate 11 and the protective cover may be provided in a circular shape, an oval shape, a trapezoid shape, etc., and the side plates 13 may be provided in one or more shapes and surround-form a circular shape, an oval shape, a trapezoid shape, etc., such that the battery case is formed in a cylindrical shape, an oval cylindrical shape, a prismatic shape, etc. The battery case may also be of other shapes, and is not described in detail herein.

In one embodiment, the structural beam 12 may also be one side plate 13 of the box 10, namely: the battery pack 20 may be fixedly connected directly to the side plate 13 of the case 10.

In one embodiment, the battery device may include a battery pack, and may further include other necessary components and compositions, which may be correspondingly supplemented by those skilled in the art according to the specific usage requirements of the battery device, and will not be described herein.

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 device, characterized by comprising:

the box body (10) comprises a bottom plate (11) and a structural beam (12);

the battery pack (20) is arranged in the box body (10), the battery pack (20) comprises a supporting plate (21), single batteries (22) and a reinforcing plate (23), the supporting plate (21) and the bottom plate (11) are oppositely arranged, the single batteries (22) are located at one side, deviating from the bottom plate (11), of the supporting plate (21), and the reinforcing plate (23) is located at one side, deviating from the bottom plate (11), of the single batteries (22); the reinforcing plate (23) is provided with a first connecting portion (231), the supporting plate (21) is provided with a second connecting portion (211), and the first connecting portion (231) and the second connecting portion (211) are located on one side, close to the structural beam (12), of the battery pack (20) and are connected with the structural beam (12).

2. The battery device according to claim 1, characterized in that the orthographic projection of the first connection (231) on the structural beam (12) and the orthographic projection of the second connection (211) on the structural beam (12) at most have an overlap.

3. The battery device according to claim 2, wherein the first connection portion (231) is a first connection plate (232), the first connection plate (232) is connected to the reinforcing plate (23) and extends in a direction away from the unit cells (22), and the first connection plate (232) is connected to a side of the structural beam (12) facing away from the bottom plate (11).

4. A battery device according to claim 3, wherein the second connection portion (211) is a second connection plate (212), and the second connection plate (212) is connected to the support plate (21) and extends in a direction away from the unit cells (22);

the structure beam (12) is provided with a second mounting groove (122) on one surface deviating from the bottom plate (11), and the second connecting plate (212) is positioned on the bottom surface of the second mounting groove (122) and connected with the bottom surface of the second mounting groove (122).

5. The battery device according to claim 4, wherein a first mounting groove (121) is formed in a surface of the structural beam (12) facing away from the bottom plate (11), the first connecting plate (232) is located in the first mounting groove (121) and is connected with a bottom surface of the first mounting groove (121), and a depth of the first mounting groove (121) is smaller than a depth of the second mounting groove (122).

6. The battery device according to claim 1, characterized in that the structural beam (12) is located between the first connection portion (231) and the second connection portion (211), and that the first connection portion (231) is connected to a side of the structural beam (12) facing away from the base plate (11), and that the second connection portion (211) is connected to a side of the structural beam (12) facing closer to the base plate (11).

7. The battery device according to any one of claims 1 to 6, wherein a plurality of the first connection portions (231) are provided, and a plurality of the first connection portions (231) are provided at intervals; the second connecting parts (211) are arranged in a plurality, and the second connecting parts (211) are arranged at intervals.

8. The battery device according to claim 7, wherein a space between adjacent two of the first connection portions (231) is the same as a space between adjacent two of the second connection portions (211).

9. The battery device according to any one of claims 1 to 6, wherein the unit cell (22) includes:

a battery housing (24) comprising an oppositely disposed first surface (241), an oppositely disposed second surface (242) and an oppositely disposed third surface (243), the first surface (241) having an area greater than the area of the second surface (242), the second surface (242) having an area greater than the area of the third surface (243);

one of the second surfaces (242) is disposed opposite the floor (11) and the third surface (243) is disposed opposite the structural beam (12).

10. The battery device according to claim 9, wherein the structural beams (12) have two, and the two structural beams (12) are disposed opposite to the two third surfaces (243), respectively; the first connecting parts (231) are arranged on two sides, close to the two third surfaces (243), of the reinforcing plate (23); the second connecting parts (211) are arranged on two sides, close to the two third surfaces (243), of the supporting plate (21).

11. The battery device according to claim 5, characterized in that the area of the orthographic projection of the first connection plate (232) on the structural beam (12) is the same as the area of the orthographic projection of the second connection plate (212) on the structural beam (12); the area of the orthographic projection of the first mounting groove (121) on the structural beam (12) is the same as the area of the orthographic projection of the second mounting groove (122) on the structural beam (12).