CN219959234U - 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, an expansion beam, a heat exchange joint and a battery pack; the box body comprises a bottom plate and a plurality of side plates, and the plurality of side plates and the bottom plate enclose an accommodating space; the expansion beam is arranged in the accommodating space and divides the accommodating space into a first accommodating space and a second accommodating space; the heat exchange joint is arranged in the first accommodating space; the battery pack is located in the second accommodating space and is attached to the expansion beam. When the battery pack expands, the expansion beam can block the expansion of the battery pack, so that the battery pack expanded can be prevented from being extruded to the heat exchange joint to cause the damage of the battery pack and/or the heat exchange joint, and the battery device can be prevented from being damaged.

Description

Battery device

Technical Field

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

Background

In order to maintain economic sustainable development and protect the environment and energy supply for human living, zero emission of battery devices is the first choice as a new energy source.

However, the current battery device is easily damaged when the battery pack swells.

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 defect that the battery device of the related art is easy to damage when the battery pack expands, and provide a battery device which is not easy to damage.

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

the box body comprises a bottom plate and a plurality of side plates, and a plurality of side plates and the bottom plate enclose an accommodating space;

an expansion beam which is arranged in the accommodating space and divides the accommodating space into a first accommodating space and a second accommodating space;

the heat exchange joint is arranged in the first accommodating space;

and the battery pack is positioned in the second accommodating space and is attached to the expansion beam.

The battery device of this disclosure, on the one hand, utilize the expansion beam to separate accommodation space into first accommodation space and second accommodation space to set up heat exchange joint in first accommodation space, set up the group battery at the second accommodation space, with this can utilize the expansion beam to separate heat exchange joint and group battery, reduced the probability that the group battery is close to the extrusion heat exchange joint after the expansion takes place for one side that heat exchange joint.

On the other hand, when the one side that the group battery is close to heat exchange joint takes place to expand, the expansion beam can block the expansion of group battery, can effectively prevent to appear because the group battery extrusion heat exchange joint after the expansion and the problem that causes group battery and/or heat exchange joint to take place to damage to can effectively prevent that battery device from damaging when the group battery takes place to expand. Meanwhile, when the expanded battery pack is damaged due to the fact that the heat exchange joint is extruded, potential safety hazards such as deflagration and the like can be generated in the expanded battery pack. Thus, the present disclosure can effectively avoid such potential safety hazards by providing an expansion beam within the battery device.

On the other hand, the expansion beam is tightly attached to the battery pack, so that the expansion beam can be used for limiting and fixing the battery pack, and the problem that the battery pack falls off due to vibration or impact in the use process is prevented.

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

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

Fig. 3 is a schematic structural view of an example embodiment of a battery pack of the present disclosure.

Fig. 4 is a partial schematic structure view of another exemplary embodiment of a battery pack 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 side plate; 121. a first side plate; 13. an accommodation space; 131 a first accommodation space; 132. a second accommodation space;

20. an expansion beam;

30. a heat exchange joint; 31. a connection part;

40. a battery pack; 41. a single battery; 42. a battery case; 421. a first surface; 422. a second surface; 423. a third surface; 43. an end plate; 44. a single battery row; 45. a battery post;

50. a heat exchange plate; 60. a heat exchange connecting pipe; x, first 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 device, which includes a case 10, an expansion beam 20, a heat exchange joint 30, and a battery pack 40, as shown with reference to fig. 1 to 5; the case 10 includes a bottom plate 11 and a plurality of side plates 12, and the plurality of side plates 12 and the bottom plate 11 enclose an accommodating space 13; the expansion beam 20 is disposed in the accommodating space 13 and partitions the accommodating space 13 into a first accommodating space 131 and a second accommodating space 132; the heat exchange joint 30 is disposed in the first accommodating space 131; the battery pack 40 is positioned in the second accommodation space 132 and is attached to the expansion beam 20.

In the battery device of the disclosure, on one hand, the accommodating space 13 is divided into the first accommodating space 131 and the second accommodating space 132 by using the expansion beam 20, the heat exchange joint 30 is arranged in the first accommodating space 131, and the battery pack 40 is arranged in the second accommodating space 132, so that the heat exchange joint 30 and the battery pack 40 can be separated by using the expansion beam 20, and the probability that the heat exchange joint 30 is extruded after the expansion of one side of the battery pack 40 close to the heat exchange joint 30 is reduced.

On the other hand, when the battery pack 40 expands near the heat exchange joint 30, the expansion beam 20 can block the expansion of the battery pack 40, so that the problem that the battery pack 40 and/or the heat exchange joint 30 are damaged due to the fact that the expanded battery pack 40 presses the heat exchange joint 30 can be effectively prevented, and the battery device can be effectively prevented from being damaged when the battery pack 40 expands. Meanwhile, when the expanded battery pack 40 is damaged due to the compression of the heat exchange joint 30, the expanded battery pack 40 may generate potential safety hazards such as explosion. Thus, the present disclosure can effectively avoid such potential safety hazards by providing the expansion beam 20 within the battery device.

On the other hand, by closely adhering the expansion beam 20 to the battery pack 40, the expansion beam 20 can be used to limit and fix the battery pack 40, thereby preventing the battery pack 40 from falling off due to vibration or impact during use.

It should be noted that, the heat exchange joint 30 being disposed in the first accommodating space 131 means that the heat exchange joint 30 may be at least partially located in the first accommodating space 131, or may be located on the side plate 12 surrounding the first accommodating space 131.

In one embodiment of the present disclosure, referring to fig. 1, a case 10 may include a bottom plate 11, a protective cover (not shown in the drawings), and four side plates 12, the bottom plate 11 and the protective cover may be rectangular, four side plates 12 are disposed around the bottom plate 11, the four side plates 12 are connected end to form a rectangular ring, the protective cover is disposed at the other side of the four side plates 12, and the protective cover is disposed opposite to the bottom plate 11. The bottom plate 11, the protective cover and the four side plates 12 surround to form an accommodating space 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, a hexagon shape, etc., and the side plate 12 may be provided in one or more and formed around the circular shape, the oval shape, the trapezoid shape, the hexagon shape, etc., such that the case 10 is formed in a cylindrical shape, an oval cylindrical shape, a prismatic shape, etc. The case 10 may have other shapes, and will not be described in detail herein.

In one embodiment, the expansion beam 20 may be fixedly connected with the bottom plate 11, or the expansion beam 20 may be fixedly connected with the side plates 12 at both ends in the extending direction thereof, so as to ensure that the expansion beam 20 and the case 10 can be firmly connected.

But not limited thereto, the expansion beam 20 may be fixedly coupled to the bottom plate 11, the side plates 12 at both ends of the extension direction thereof, thereby enabling more stable coupling of the expansion beam 20 and the case 10.

The fixing connection manner of the expansion beam 20 and the bottom plate 11 includes, but is not limited to, welding, riveting or screw connection.

In one embodiment, the plurality of side plates 12 may include a first side plate 121, and the first side plate 121 may be disposed opposite the expansion beam 20, that is: the extending direction of the first side plate 121 may be the same as the extending direction of the expansion beam 20. The heat exchange joint 30 may be provided on the first side plate 121. Since the first receiving space 131 is provided between the first side plate 121 and the expansion beam 20, there is a space between the first side plate 121 and the expansion beam 20, and when the heat exchange joint 30 is disposed on the first side plate 121, there is a space between the heat exchange joint 30 and the expansion beam 20, so that when the heat exchange joint 30 is installed, the space can provide a sufficient installation space for the heat exchange joint 30, so that the expansion beam 20 does not affect the installation of the heat exchange joint 30, thereby facilitating the installation of the heat exchange joint 30. The space between the heat exchange joint 30 and the expansion beam 20 can provide a buffer space for the deformation of the expansion beam 20, so that the expansion beam 20 is prevented from being deformed to press the heat exchange joint 30 when the battery pack 40 expands, and the heat exchange joint 30 can be further prevented from being damaged.

In the present embodiment, the width of the first receiving space 131 in the first direction X may be 30mm or more to provide a sufficient installation space for the installation of the heat exchange joint 30, further preventing the expansion beam 20 from affecting the installation of the heat exchange joint 30. And, when the width of the first receiving space 131 in the first direction X is 30mm or more, a sufficient buffer space can be reserved for the deformation of the expansion beam 20, further preventing the compression of the heat exchange joint 30 when the expansion beam 20 is deformed.

The width of the first accommodating space 131 in the first direction X may be 120mm or less, so as to avoid the first accommodating space 131 occupying too large space of the case 10 and reducing the space utilization of the case 10.

The first direction X is a direction in which the first accommodating space 131 points to the second accommodating space 132.

In one embodiment, the ratio of the width of the first receiving space 131 to the width of the second receiving space 132 in the first direction X may be 1/30 or more to ensure that the heat exchange joint 30 has a sufficient installation space and that the expansion beam 20 has a sufficient buffer space, thereby enabling the expansion beam 20 to be ensured not to have an effect on the installation of the heat exchange joint 30 and enabling the expansion beam 20 not to press the heat exchange joint 30 when the deformation occurs.

The ratio of the width of the first receiving space 131 in the first direction X to the width of the second receiving space 132 in the first direction X may be 1/15 or less to increase the space in the case 10 where the battery pack 40 is disposed, thereby allowing a larger battery pack 40 to be placed in the case 10 and thus improving the energy density of the battery device.

In one embodiment of the present disclosure, referring to fig. 2, the heat exchange joint 30 may be provided with a first port and a second port. Wherein, the first port may be located in the first receiving space 131, and the second port may penetrate the first side plate 121. By such arrangement, the heat exchange joint 30 can conveniently communicate the heat exchange member outside the battery device with the heat exchange member inside the battery device.

Referring to fig. 1 and 2, the outer wall surface of the first port may be provided with a connection part 31, and the connection part 31 may be connected with one side of the first side plate 121 near the expansion beam 20, so as to fix the heat exchange joint 30 with the first side plate 121, preventing the heat exchange joint 30 from falling off during the use of the battery device.

The connection portion 31 may be a connection plate, which may be connected to an outer wall surface of the first port, and may be connected to a surface of the first side plate 121 near the expansion beam 20, so as to achieve the purpose of the outer wall surface of the first port and the surface of the first side plate 121 near the expansion beam 20.

The connecting plate and the outer wall surface of the first port can be of an integrated structure, namely, the connecting plate and the outer wall surface of the first port are integrally formed through an extrusion process or a sheet metal, a stamping process and the like, and are not connected through welding, riveting, screw connection and other connection modes. By the arrangement, the connection strength between the connecting plate and the outer wall surface of the first port can be improved, and the probability of separation between the connecting plate and the outer wall surface of the first port is reduced.

The connection plate and the side of the first side plate 121 adjacent to the expansion beam 20 may be connected by welding, bonding, or the like. However, the surface of the connection plate adjacent to the expansion beam 20 with the first side plate 121 may be connected by a screw or a bolt, that is, the connection plate may be provided with a through hole through which the screw or the bolt may pass to fix the connection plate with the surface of the first side plate 121 adjacent to the expansion beam 20.

In other embodiments of the present disclosure, the connection portion 31 may also be located at an outer wall surface of the second port, and connect the connection portion 31 with a surface of the first side plate 121 remote from the expansion beam 20. By this arrangement, the heat exchange joint 30 and the first side plate 121 can be fixed as well, and the heat exchange joint 30 is prevented from falling off during the use of the battery device.

Referring to fig. 1 to 4, in one embodiment of the present disclosure, the battery device may further include a heat exchange plate 50 and a heat exchange connection pipe 60. The heat exchange plate 50 may be in contact with the battery pack 40, a heat exchange flow channel may be provided in the heat exchange plate 50, and a heat exchange medium may be introduced into the heat exchange flow channel, so that heat generated by the battery pack 40 and heat of the heat exchange medium may be exchanged by the heat exchange medium. Namely: when the battery pack 40 needs to be cooled, a heat exchange medium with lower temperature can be introduced into the heat exchange plate 50 to cool the battery pack 40; when it is necessary to raise the temperature of the battery pack 40, a heat exchange medium with a higher temperature may be introduced into the heat exchange plate 50 to heat the battery pack 40.

In this example embodiment, the heat exchange medium may be a phase change material, such as: water, acetic acid, and the like. However, the heat exchange medium is not limited thereto, and may be other materials, so long as heat exchange can be achieved, and details are not described here.

The heat exchange connection pipe 60 may be located in the first receiving space 131, and the heat exchange connection pipe 60 may be provided with a first communication port and a second communication port. The first communication port and the second communication port may be respectively communicated with the first port of the heat exchange joint 30 and the heat exchange plate 50, so as to introduce the heat exchange medium transferred by the heat exchange joint 30 into the heat exchange plate 50 or transfer the heat exchange medium after the heat exchange in the heat exchange plate 50 is completed to the heat exchange joint 30.

In one embodiment, the second communication port of the heat exchange connection pipe 60 may communicate with a heat exchange flow passage in the heat exchange plate 50.

The heat exchange connection pipe 60 and the expansion beam 20 may have a space therebetween, which may provide a buffer space for the deformation of the expansion beam 20, thereby preventing the expansion beam 20 from being compressed when the battery pack 40 expands, resulting in the expansion beam 20 being deformed to compress the heat exchange connection pipe 60, and thus preventing the heat exchange connection pipe 60 from being damaged when the battery pack 40 expands.

In one embodiment, the spacing between the heat exchange connection pipe 60 and the expansion beam 20 may be 5mm or more to ensure that the expansion beam 20 is deformed without compressing the heat exchange connection pipe 60. The interval between the heat exchange connection pipe 60 and the expansion beam 20 may be 100mm or less to avoid too close a distance between the heat exchange connection pipe 60 and the first side plate 121, thereby preventing the first side plate 121 from being deformed by an impact force to press the heat exchange connection pipe 60, resulting in damage of the heat exchange connection pipe 60.

In one embodiment, the heat exchange plate 50 may have a liquid inlet and a liquid outlet, which may be in communication with heat exchange flow channels within the heat exchange plate 50. The number of the heat exchange joints 30 can be two, and the two heat exchange joints 30 can be a liquid inlet joint and a liquid outlet joint respectively. The number of the heat exchange connecting pipes 60 may be two, wherein the first communication port and the second communication port of one heat exchange connecting pipe 60 are respectively communicated with the first end of the liquid inlet connector and the liquid inlet of the heat exchange plate 50, and the first communication port and the second communication port of the other heat exchange connecting pipe 60 are respectively communicated with the first port of the liquid outlet connector and the liquid outlet of the heat exchange plate 50.

So set up, can form heat transfer medium circulation loop in battery device, can pass through the feed liquor and connect in the feed liquor mouth lets in heat transfer board 50 with new heat transfer medium to heat transfer medium after accomplishing heat transfer is led out in passing through liquid outlet and the play liquid joint follow heat transfer board 50, thereby can last to let in new heat transfer medium in the heat transfer board 50, just also can last to carry out the heat transfer to group battery 40.

In one embodiment, two heat exchange joints 30 may be disposed at intervals in the extending direction of the side plate 12 to prevent the occurrence of interference between the two heat exchange joints 30. The two heat exchange connection pipes 60 may be disposed at intervals in the extending direction of the side plate 12 to prevent the two heat exchange connection pipes 60 from interfering with each other.

Referring to fig. 1 and 5, the battery pack 40 may include a unit cell 41, the unit cell 41 may be provided with a cell case 42, the cell case 42 may be substantially rectangular parallelepiped, and the cell case 42 may include two opposite first surfaces 421, two opposite second surfaces 422, and two opposite third surfaces 423. Wherein the area of the first surface 421 is larger than the area of the second surface 422, and the area of the first surface 421 is larger than the area of the third surface 423. With this structure, the battery case 42 can improve the space utilization of the case 10, thereby improving the energy density of the battery device.

In one embodiment, the area of the second surface 422 is greater than the area of the third surface 423.

The material of the battery case 42 may be a metal material, for example: steel, aluminum, etc. The battery housing 42 may be of an integrally formed construction, namely: the two first surfaces 421, the two second surfaces 422 and the two third surfaces 423 can be integrally manufactured, so that the connection position of the battery shell 42 can be reduced while the greater structural strength of the battery shell 42 is ensured, the possibility of cracking of the connection position can be reduced, and the metal shell can be ensured to have better tightness to the battery cell. But is not limited thereto, the battery case 42 may be a separate structure, which is also within the scope of the present disclosure.

The battery cell 41 may also include an electrical core. The battery cell refers to a unit formed by winding or laminating a stack portion including 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 a battery housing 42.

In one embodiment, the unit cell 41 may further include: and a battery post 45. The conductive bars may be electrically connected to the battery post 45. The battery post 45 may be provided on a surface of the battery case 42 parallel to the height direction, that is: the battery post 45 may be disposed on the first surface 421 or the third surface 423. The battery post 45 may be electrically connected to the battery cell to form the positive and negative poles of the battery cell 41.

In one embodiment, the battery poles 45 may have two, and the two battery poles 45 may be located on the same first surface 421, so as to save space occupied by the unit battery 41 in the case 10, thereby improving space utilization of the case 10 and improving energy density of the battery device.

But not limited thereto, two battery poles 45 may be respectively located on the opposite two first surfaces 421, or one of the battery poles 45 is located on the first surface 421, the other battery pole 45 is located on the third surface 423, or two battery poles 45 may be respectively located on the opposite two third surfaces 423 as shown with reference to fig. 3.

Alternatively, both posts may be located on the second surface 422 and may be located on the second surface 422 adjacent the cover plate.

In one embodiment, as shown with reference to fig. 1 and 5, one of the first surfaces 421 may be disposed opposite the expansion beam 20 and one of the second surfaces 422 may be disposed opposite the bottom plate 11. Since the area of the first surface 421 is largest, the expansion of the first surface 421 is most serious when the cell 41 expands due to thermal runaway, and therefore, the expansion of the first surface 421 can be restricted by the expansion beam 20 by disposing the first surface 421 to face the expansion beam 20, and the expansion of the cell 41 can be restricted to the largest extent.

The battery pack 40 may further include an end plate 43 disposed between the cell 41 and the expansion beam 20, and may be fitted to the expansion beam 20 and a first surface 421 of the cell 41 disposed opposite to the expansion beam 20 for insulating the cell 41 and the expansion beam 20.

It should be noted that, the end plate 43 may be a series of structures disposed at the end of the battery pack 40, such as a conventional end plate structure, an insulating pad or a cushion pad, and different types of end plates 43 may be selected according to different needs.

In one embodiment, the heat exchange plate 50 may be disposed between the second surface 422 and the bottom plate 11, so that the disposition of the heat exchange plate 50 can be facilitated, and the space of the case 10 in the first direction X can be saved, improving the battery density of the battery device.

Referring to fig. 1 to 4, in the battery pack 40, at least two unit cells 41 may be provided, and the first surfaces 421 of adjacent two unit cells 41 may be disposed opposite to each other, so that the space utilization of the battery device can be further improved, and the energy density of the battery device can be further improved. The end plate 43 may be located between the cell 41 adjacent to the expansion beam 20 and the expansion beam 20 among the at least two cells 41.

Referring to fig. 1, the heat exchange plates 50 may be disposed between the second surfaces 422 of the at least two unit cells 41 and the bottom plate 11, so that heat exchange of the at least two unit cells 41 can be achieved by using one heat exchange plate 50, the number of the heat exchange plates 50 is reduced, and the setting and connection difficulty of the heat exchange plates 50 can be simplified.

In one embodiment, the bottom plate 11 may be reused as the heat exchange plate 50, i.e. the heat exchange flow channels are provided in the bottom plate 11, and the second communication port of the heat exchange connection pipe 60 may be communicated with the heat exchange flow channels in the bottom plate 11. Compared with the previous embodiment, the present embodiment can effectively reduce the thickness of the base plate 11 and can effectively reduce the weight of the battery device since there is no need to separately add one heat exchange plate 50 to the base plate 11.

In another embodiment of the present disclosure, as shown with reference to fig. 3 to 5, the heat exchange plate 50 may be located between the first surfaces 421 of the adjacent two unit cells 41. Since the area of the first surface 421 is the largest among the unit cells 41, the heat dissipation amount of the first surface 421 is the largest, so that when the heat exchange plate 50 is disposed between the first surfaces 421 of the adjacent two unit cells 41, the heat exchange amount between the heat exchange plate 50 and the unit cells 41 is large, so that the heat exchange effect between the heat exchange plate 50 and the unit cells 41 is better than that of the foregoing embodiment.

In one embodiment of the present disclosure, referring to fig. 4 to 5, the battery pack 40 may include at least two cell strings 44, at least two cells 41 are disposed in each cell string 44, and third surfaces 423 of two adjacent cells 41 in one cell string 44 are disposed opposite to each other. By the arrangement, one large-volume single battery 41 in the battery device can be divided into a plurality of small-volume single batteries 41, and the manufacturing difficulty of the single batteries 41 can be reduced. In addition, when one single battery 41 in the battery array is damaged, only the single battery 41 with small volume needs to be replaced, and the whole single battery array 44 does not need to be replaced, so that the maintenance cost of the battery device can be reduced.

In the present embodiment, the unit cells 41 in the adjacent two unit cell rows 44 are in one-to-one correspondence, and the first surfaces 421 of the corresponding two unit cells 41 are disposed opposite to each other, and the heat exchange plate 50 may be located between the adjacent two unit cell rows 44. By the arrangement, the heat exchange plate 50 can be located on the surface with the greatest heat in the single battery array 44, and the heat exchange effect of the heat exchange plate 50 and the single battery array 44 is better.

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.

The terms "parallel" and "perpendicular" as used herein are not intended to be entirely parallel, perpendicular, but rather are subject to certain errors; 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 (15)

1. A battery device, characterized by comprising:

the box body (10) comprises a bottom plate (11) and a plurality of side plates (12), and a containing space (13) is formed by the side plates (12) and the bottom plate (11);

an expansion beam (20) which is provided in the accommodation space (13) and which divides the accommodation space (13) into a first accommodation space (131) and a second accommodation space (132);

a heat exchange joint (30) arranged in the first accommodating space (131);

and a battery pack (40) which is positioned in the second accommodating space (132) and is attached to the expansion beam (20).

2. The battery device according to claim 1, wherein a plurality of the side plates (12) includes a first side plate (121), the first side plate (121) being disposed opposite the expansion beam (20), and the heat exchange joint (30) being disposed on the first side plate (121).

3. The battery device according to claim 2, characterized in that the heat exchange joint (30) is provided with a first port located in the first accommodation space (131) and a second port penetrating the first side plate (121).

4. A battery device according to claim 3, wherein the outer wall surface of the first port is provided with a connecting portion (31), and the connecting portion (31) is connected to a face of the first side plate (121) close to the expansion beam (20).

5. The battery device of claim 3, wherein the battery device further comprises:

a heat exchange plate (50) in contact with the battery pack (40);

the heat exchange connecting pipe (60) is positioned in the first accommodating space (131), an interval is reserved between the heat exchange connecting pipe (60) and the expansion beam (20), the heat exchange connecting pipe (60) is provided with a first communication port and a second communication port, and the first communication port and the second communication port are respectively communicated with the first port of the heat exchange joint (30) and the heat exchange plate (50).

6. The battery device according to claim 5, wherein the battery pack (40) includes:

a single battery (41) provided with a battery housing (42), the battery housing (42) comprising two opposing first surfaces (421), two opposing second surfaces (422) and two opposing third surfaces (423), the first surfaces (421) having an area larger than the area of the second surfaces (422) and the first surfaces (421) having an area larger than the area of the third surfaces (423), wherein one of the first surfaces (421) is disposed opposite to the expansion beam (20), and one of the second surfaces (422) is disposed opposite to the bottom plate (11);

an end plate (43) which is provided between the single cell (41) and the expansion beam (20), and which is bonded to the expansion beam (20) and the first surface (421) provided opposite to the expansion beam (20).

7. The battery device according to claim 6, wherein at least two of the unit cells (41) are provided, first surfaces (421) of adjacent two of the unit cells (41) are disposed opposite to each other, and the end plate (43) is located between the unit cell (41) adjacent to the expansion beam (20) and the expansion beam (20) of the at least two unit cells (41).

8. The battery device according to claim 6, characterized in that the heat exchange plate (50) is arranged between the second surface (422) and the bottom plate (11).

9. Battery device according to claim 8, characterized in that the bottom plate (11) is multiplexed as the heat exchanger plate (50).

10. The battery device according to claim 7, wherein the heat exchange plate (50) is located between the first surfaces (421) of two adjacent unit batteries (41).

11. The battery device according to claim 7, wherein the battery pack (40) includes:

at least two single battery columns (44), wherein at least two single batteries (41) are arranged in each single battery column (44), and the third surfaces (423) of two adjacent single batteries (41) in one single battery column (44) are oppositely arranged;

the single cells (41) in two adjacent single cell columns (44) are in one-to-one correspondence, and the first surfaces (421) of the corresponding two single cells (41) are oppositely arranged;

the heat exchange plates (50) are positioned between two adjacent single battery columns (44).

12. The battery device according to claim 5, wherein the heat exchange plate (50) has a liquid inlet and a liquid outlet, the number of the heat exchange joints (30) is two, and the two heat exchange joints (30) are a liquid inlet joint and a liquid outlet joint respectively; the two heat exchange connecting pipes (60) are arranged, wherein a first communication port and a second communication port of one heat exchange connecting pipe (60) are respectively communicated with a first port and a liquid inlet of the liquid inlet joint, and a first communication port and a second communication port of the other heat exchange connecting pipe (60) are respectively communicated with a first port and a liquid outlet of the liquid outlet joint.

13. The battery device according to any one of claims 1 to 12, wherein a width of the first accommodation space (131) in the first direction is 30mm or more and 120mm or less;

wherein the first direction is a direction in which the first accommodation space (131) points to the second accommodation space (132).

14. The battery device according to claim 13, wherein a ratio of a width of the first accommodation space (131) in a first direction to a width of the second accommodation space (132) in the first direction is 1/30 or more and 1/15 or less.

15. The battery device according to claim 5 or 12, wherein a space between the heat exchange connection pipe (60) and the expansion beam (20) is 5mm or more and 100mm or less.