CN219591501U - Battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device which comprises at least two battery assemblies arranged along a first direction, wherein each battery assembly comprises a bracket, a battery and a heat exchange plate, the bracket is respectively provided with a first accommodating groove and a second accommodating groove, the battery is accommodated in the first accommodating groove, the heat exchange plate is accommodated in the second accommodating groove and is used for exchanging heat with the battery, the heat exchange plate is positioned on a first surface of the battery perpendicular to the first direction, and the surface area of the first surface is larger than the surface area of any other surface of the battery. Through the structural design, the utility model can be suitable for a large-area heat exchange scheme, and the battery and the heat exchange plate are simultaneously accommodated by using one bracket, so that a plurality of batteries and the heat exchange plates in the large-area heat exchange scheme can be alternately arranged. In addition, the bracket has a simple structure, so that the utility model is beneficial to reducing the process complexity of the product.

Description

Battery device

Technical Field

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

Background

In the design of the existing battery device, when the bottom heat exchange scheme is adopted, the battery is fixed by the support and is arranged on the heat exchange plate, and when the large-surface heat exchange scheme is adopted, the alternate arrangement of the battery and the heat exchange plate is required to be ensured, and the support adopted in the existing bottom heat exchange scheme cannot meet the setting requirement.

Disclosure of Invention

It is therefore an object of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a battery device with a simple structure in which a bracket can simultaneously fix a battery and a heat exchange plate.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the present utility model, there is provided a battery device, comprising at least two battery assemblies arranged along a first direction, the battery assemblies including a bracket, a battery, and a heat exchange plate, the bracket being provided with a first accommodating groove and a second accommodating groove, respectively, the battery being accommodated in the first accommodating groove and being used for exchanging heat with the battery, the heat exchange plate being accommodated in the second accommodating groove, the heat exchange plate being located on a first surface of the battery perpendicular to the first direction, the surface area of the first surface being larger than that of any other surface of the battery.

As can be seen from the above technical solutions, the battery device provided by the present utility model has the following advantages and positive effects:

the battery device comprises at least two battery assemblies, each battery assembly comprises a bracket, a battery and a heat exchange plate, the brackets are respectively provided with a first accommodating groove and a second accommodating groove, the battery is accommodated in the first accommodating groove, the heat exchange plate is accommodated in the second accommodating groove, the heat exchange plate is positioned on a first surface of the battery perpendicular to a first direction, and the surface area of the first surface is larger than the surface area of any other surface of the battery. Through the structural design, the utility model can be suitable for a large-area heat exchange scheme, and the battery and the heat exchange plate are simultaneously accommodated by using one bracket, so that a plurality of batteries and the heat exchange plates in the large-area heat exchange scheme can be alternately arranged. In addition, the bracket has a simple structure, so that the utility model is beneficial to reducing the process complexity of the product.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is a schematic perspective view of a battery device according to an exemplary embodiment;

fig. 2 is an exploded perspective view of a part of the structure of the battery device shown in fig. 1;

FIG. 3 is another angular view of FIG. 2;

FIG. 4 is a partial cross-sectional view of the stent shown in FIG. 2;

fig. 5 is a schematic perspective view of the bracket shown in fig. 2;

FIG. 6 is another angular view of FIG. 4;

fig. 7 is a partially cut-away enlarged view of a part of the structure of the battery device shown in fig. 1;

fig. 8 is a schematic partial cross-sectional view of the heat exchanger plate shown in fig. 2.

The reference numerals are explained as follows:

100. a bracket;

110. a first accommodation groove;

120. a second accommodation groove;

121. a glue overflow groove;

130. a first communicating duct;

140. a first communication accommodating groove;

141. sealing grooves;

142. a seal ring;

151. positioning the concave;

152. positioning the bulge;

160. a mounting hole;

200. a battery;

300. a heat exchange plate;

301. a flow passage;

310. a current collecting end;

311. a liquid inlet;

312. a liquid outlet;

320. a first communication joint;

400. a cover plate;

500. a case;

A. a battery assembly;

x, a first direction;

y. second direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model are described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the utility model may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present utility model. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model.

Referring to fig. 1, a schematic perspective view of a battery device according to the present utility model is representatively illustrated. In this exemplary embodiment, the battery device according to the present utility model is described as being applied to a vehicle-mounted battery. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs of the present utility model to other types of battery devices, and such changes are still within the principles of the battery devices presented herein.

As shown in fig. 1, in an embodiment of the present utility model, the battery device according to the present utility model includes at least two battery assemblies a arranged along a first direction X, the battery assemblies a including a bracket 100, a battery 200, and a heat exchange plate 300. Referring to fig. 2 to 8 in combination, an exploded perspective view of a part of the structure of the battery device is representatively illustrated in fig. 2; another angular view of fig. 2 is representatively illustrated in fig. 3; a partial cross-sectional view of the stent 100 is representatively illustrated in fig. 4, with a partial region thereof shown enlarged; a schematic perspective view of the bracket 100 is representatively illustrated in fig. 5, with a partial region thereof shown enlarged; FIG. 6 representatively illustrates another angular view of FIG. 5 with a partial region thereof shown enlarged; an enlarged partial sectional view of a part of the structure of the battery device is representatively illustrated in fig. 7, in which the structure of two adjacent battery assemblies a is specifically illustrated; a schematic partial cross-sectional view of a heat exchanger plate 300 is representatively illustrated in fig. 8. The structure, connection manner and functional relationship of the main components of the battery device according to the present utility model will be described in detail below with reference to the above-mentioned drawings.

As shown in fig. 1 to 4, in an embodiment of the present utility model, the bracket 100 is provided with a first receiving groove 110 and a second receiving groove 120, respectively. The battery 200 is accommodated in the first accommodating groove 110, the heat exchange plate 300 is accommodated in the second accommodating groove 120 and is used for exchanging heat with the battery 200, and the heat exchange plate 300 is located on a first surface of the battery 200 perpendicular to the first direction X, and the surface area of the first surface is larger than the surface area of any other surface of the battery 200, i.e. the above arrangement mode of the heat exchange plate 300 and the battery 200 adopts a "large-surface heat exchange" scheme. Through the above structural design, the utility model can be applied to a heat exchange scheme of large-area heat exchange, and the battery 200 and the heat exchange plate 300 are simultaneously accommodated by using one bracket 100, so that the alternating arrangement of a plurality of batteries 200 and the heat exchange plate 300 in the large-area heat exchange scheme can be realized. Moreover, the present utility model is advantageous in reducing the process complexity of the product due to the simple structure of the stand 100.

As shown in fig. 2 to 4, in an embodiment of the present utility model, the first receiving groove 110 and the second receiving groove 120 may be respectively opened at opposite sides of the bracket 100 perpendicular to the first direction X. Through the above structural design, the battery 200 and the heat exchange plate 300 can be respectively installed in the bracket 100 along the first direction X, so that the process complexity is further reduced. Meanwhile, since the side of the bracket 100 perpendicular to the first direction X corresponds to the first surface of the battery 200, the present utility model can further reduce the weight of the bracket 100, reduce material consumption, and facilitate cost reduction. In some embodiments, at least one of the first accommodating groove 110 and the second accommodating groove 120 may be formed on a side surface of the bracket 100 perpendicular to the second direction Y (the second direction Y is perpendicular to the first direction X), or formed on a top surface or a bottom surface of the bracket 100, which is not limited in this embodiment.

As shown in fig. 2 to 4, in an embodiment of the present utility model, the first receiving groove 110 and the second receiving groove 120 may be in communication. Specifically, as shown in fig. 2 to 4, the first accommodating groove 110 and the second accommodating groove 120 are respectively formed on two opposite sides of the bracket 100 perpendicular to the first direction X, and the bottoms of the first accommodating groove 110 and the second accommodating groove 120 may also be communicated.

As shown in fig. 2, 3 and 7, in an embodiment of the present utility model, an end of the heat exchange plate 300 along the second direction Y extends beyond the battery 200 along the second direction Y, the second direction Y is perpendicular to the first direction X, and the end of the heat exchange plate 300 along the second direction Y is provided with a liquid inlet 311 and a liquid outlet 312, and the liquid inlet 311 and the liquid outlet 312 are respectively communicated with the flow channel 301 of the heat exchange plate 300. For example, the end of the heat exchange plate 300 in the second direction Y may be provided with a current collecting end 310, i.e., the liquid inlet 311 and the liquid outlet 312 of the heat exchange plate 300 may be provided on the current collecting end 310. On this basis, the liquid inlets 311 of two adjacent heat exchange plates 300 are communicated via a first communication structure, the liquid outlets 312 of two adjacent heat exchange plates 300 are communicated via a second communication structure, and the first communication structure and the second communication structure are respectively arranged in the bracket 100. Through the structural design, the utility model can realize the communication of two adjacent heat exchange plates 300 without additionally arranging other main pipelines, thereby further reducing the process complexity.

As shown in fig. 2 and 3, based on the structural design that the liquid inlet 311 and the liquid outlet 312 are disposed at the end of the heat exchange plate 300 along the second direction Y, in an embodiment of the present utility model, the liquid inlet 311 and the liquid outlet 312 of the heat exchange plate 300 may be located at the same end of the heat exchange plate 300 along the second direction Y, for example, the heat exchange plate 300 may have only one current collecting end 310. On the basis of this, the end portions of each heat exchange plate 300 provided with the liquid inlet 311 and the liquid outlet 312 may be located on the same side in the second direction Y. In some embodiments, the liquid inlet 311 and the liquid outlet 312 may be disposed at two ends of the heat exchange plate 300 along the second direction Y, for example, the liquid inlet 311 and the liquid outlet 312 may be disposed at two current collecting ends 310, and the liquid inlet 311 of each heat exchange plate 300 may be disposed at each end of the same side along the second direction Y, and the liquid outlet 312 of each heat exchange plate 300 may be disposed at each end of the other side along the second direction Y, which is not limited in this embodiment.

As shown in fig. 7, based on the structural design that the liquid inlets 311 of two adjacent heat exchange plates 300 communicate via the first communication structure, in an embodiment of the present utility model, each group of the first communication structures may include the first communication channel 130, the first communication accommodating groove 140, and the first communication connector 320. Specifically, the liquid inlets 311 of the two heat exchange plates 300 of the adjacent two battery assemblies a are provided with first communication joints 320, respectively, at the two side openings facing each other in the first direction X. The two opposite sides of the bracket 100 perpendicular to the first direction X are respectively provided with a first communication accommodating groove 140, the two first communication accommodating grooves 140 respectively accommodate the two first communication connectors 320, and the connecting duct penetrates through the bottoms of the two first communication accommodating grooves 140 to communicate the two first communication accommodating grooves 140.

As shown in fig. 7, based on the structural design that the first communication structure includes the first communication accommodating groove 140 and the first communication joint 320, in an embodiment of the present utility model, a first sealing groove 141 is formed in a groove wall of the first communication accommodating groove 140, the first sealing groove 141 is annular, a first sealing ring 142 is disposed in the first sealing groove 141, the first sealing ring 142 is disposed around the first communication joint 320, and an inner ring of the first sealing ring 142 abuts against an outer periphery of the first communication joint 320, and the first sealing ring 142 is used for sealing the first communication joint 320. Through the above structural design, the sealing performance between the first communication accommodating groove 140 and the first communication connector 320 can be further ensured, and leakage of heat exchange medium is avoided.

Based on the structural design that the liquid outlets 312 of two adjacent heat exchange plates 300 communicate via the second communication structure, in an embodiment of the present utility model, each group of the second communication structures may include a second communication duct, a second communication accommodating groove, and a second communication joint, and the form and structure of the second communication structure may be understood with reference to the first communication structure shown in fig. 7. Specifically, the liquid outlets 312 of the two heat exchange plates 300 of the adjacent two battery assemblies a are provided with second communication joints respectively along the two opposite side openings in the first direction X. The bracket 100 is provided with second communication accommodating grooves respectively at opposite sides perpendicular to the first direction X, the two second communication accommodating grooves respectively accommodate the two second communication joints, and the connecting duct penetrates the bottoms of the two second communication accommodating grooves to communicate the two second communication accommodating grooves.

Based on the structural design that the second communication structure comprises a second communication accommodating groove and a second communication joint, in an embodiment of the utility model, a second sealing groove is formed in the groove wall of the second communication accommodating groove, the second sealing groove is annular, a second sealing ring is arranged in the second sealing groove, the second sealing ring is arranged around the second communication joint, the inner ring of the second sealing ring is abutted against the periphery of the second communication joint, and the second sealing ring is used for sealing the second communication joint. Through the structural design, the heat exchange medium sealing device can further ensure the sealing performance between the second communication accommodating groove and the second communication connector, and avoid leakage of the heat exchange medium.

As shown in fig. 5 and 6, in an embodiment of the present utility model, one side surface of the bracket 100 perpendicular to the first direction X may be provided with a positioning recess 151, and the other side surface of the bracket 100 perpendicular to the first direction X may be provided with a positioning protrusion 152, the position of the positioning protrusion 152 corresponding to the position of the positioning recess 151. On this basis, for two adjacent brackets 100, the positioning protrusion 152 of one bracket 100 is received in the recess of the other bracket 100, and the positioning protrusion 152 and the positioning recess 151 may be, but not limited to, engaged with each other by a snap fit. Through the structural design, the utility model can realize the assembly and positioning of two adjacent brackets 100 by utilizing the positioning concave 151 and the positioning convex 152, and further reduces the assembly difficulty.

As shown in fig. 1 and 5, in an embodiment of the present utility model, the battery device according to the present utility model includes at least three battery assemblies a. On this basis, each bracket 100 may be provided with two sets of mounting holes 160, where the mounting holes 160 are located at positions where the brackets 100 are not provided with the first receiving groove 110 and the second receiving groove 120, and the positions of the mounting holes 160 of the brackets 100 respectively correspond to each other. Wherein, for any adjacent three brackets 100, one set of mounting holes 160 of the middle bracket 100 is connected with one set of mounting holes 160 of the adjacent bracket 100 via a connecting piece, and the other set of mounting holes 160 of the middle bracket 100 is connected with one set of mounting holes 160 of the adjacent other bracket 100 via a connecting piece. For example, each bracket 100 may be provided with 8 mounting holes 160, and 4 mounting holes 160 are located at an upper portion of the bracket 100 (e.g., above the first receiving groove 110 and the second receiving groove 120), and another 4 mounting holes 160 are located at a lower portion of the bracket 100 (e.g., below the first receiving groove 110 and the second receiving groove 120), on the basis that, when the bracket 100 is connected to an adjacent bracket 100 on one side, the 4 mounting holes 160 (e.g., including the upper 2 mounting holes 160 and the lower 2 mounting holes 160) are connected by a connecting member, and when the bracket 100 is connected to an adjacent bracket 100 on the other side, the rest 4 mounting holes 160 (e.g., including the upper other 2 mounting holes 160 and the lower other 2 mounting holes 160) are connected by a connecting member, i.e., the two sets of mounting holes 160 of the plurality of brackets 100 are sequentially and alternately connected by a connecting member, thereby sequentially connecting all brackets 100. Through the structural design, the utility model can further reduce the assembly difficulty and the process complexity, and has better assembly effect.

In some embodiments of the present utility model, a connecting rod may also be used to connect all of the stents 100. Specifically, each bracket 100 may be provided with a mounting hole 160, the mounting hole 160 penetrates the bracket 100 along the first direction X, and the mounting hole 160 is located at a position where the bracket 100 is not provided with the first receiving groove 110 and the second receiving groove 120, and the positions of the mounting holes 160 of the brackets 100 respectively correspond. On this basis, the battery device further includes a connection rod sequentially penetrating through the mounting holes 160 of the respective brackets 100 to connect the respective brackets 100. Further, the both end portions of the connecting rod may be fixed to the brackets 100 positioned at the end portions via structures such as fastening nuts, respectively, whereby the entire assembly of the plurality of battery assemblies a is achieved. Through the structural design, the utility model can further reduce the assembly difficulty and the process complexity, and has better assembly effect.

As shown in fig. 5, in an embodiment of the present utility model, the battery 200 may be adhesively fixed in the first receiving groove 110 via structural adhesive. On this basis, the groove wall of the second accommodating groove 120 may be provided with a glue overflow groove 121. Through the above structural design, the utility model can enable the excessive structural adhesive extruded in the assembly process to be contained in the adhesive overflow groove 121, thereby avoiding the influence of the overflow of the adhesive material on the assembly effect of the battery device. In some embodiments, the heat exchange plate 300 may be adhered and fixed in the second receiving groove 120 by structural adhesive, or a heat-conducting adhesive may be disposed between the adjacent cells 200 and the heat exchange plate 300, so that the glue overflow groove 121 may be used to receive the overflow portion of the glue during the assembly process.

As shown in fig. 5, based on the structural design that the groove wall of the second accommodating groove 120 is provided with the glue overflow groove 121, in an embodiment of the utility model, the second accommodating groove 120 has a corner portion, and the glue overflow groove 121 may be provided at a corner of the groove wall corresponding to the corner portion. Through the structural design, the glue overflow quantity at the corner is more than that at other positions, and the glue overflow containing effect can be further optimized. In some embodiments, the glue overflow groove 121 may be disposed on a groove wall of the second accommodating groove 120 at other positions, which is not limited in this embodiment.

As shown in fig. 5, based on the structural design that the glue overflow groove 121 is formed on the groove wall of the second accommodating groove 120, in an embodiment of the present utility model, the cross section of the glue overflow groove 121 may be substantially circular.

As shown in fig. 8, in an embodiment of the present utility model, the heat exchange plate 300 has a flow channel 301, and the flow channel 301 may have an elliptical cross section. When the flow passage 301 has an elliptical cross section compared to a circular cross section, the flow velocity of the flow passage 301 can be increased at the same flow rate, the reynolds number of the fluid can be increased, and the heat exchange amount of the heat exchange plate 300 can be increased by changing the layer flow into a turbulent flow.

As shown in fig. 1, in an embodiment of the present utility model, in two brackets 100 located at both ends along a first direction X, a surface of one of the two brackets facing away from the other and a surface of the other bracket facing away from the one bracket may be provided with a cover plate 400, respectively. Through the above structural design, the present utility model can protect the battery 200 of the battery assembly a at one end by using the cover plate 400, and protect the heat exchange plate 300 of the battery assembly a at the other end by using the other cover plate 400, and at the same time, can improve the structural beauty of the product.

Based on the structural design of the battery device further including the cover plate 400, in an embodiment of the present utility model, when the bracket 100 is provided with the positioning protrusion 152 and the positioning recess 151, the cover plate 400 may be correspondingly provided with a protrusion or a recess, and accordingly, is engaged with the positioning protrusion 152 or the positioning recess 151, thereby further increasing the connection strength of the cover plate 400. Furthermore, one of the cover plates 400 may be provided with a total liquid inlet and a total liquid outlet, and connected to an external structure via a liquid inlet pipe and a liquid outlet pipe, so as to connect each heat exchange plate 300 to an external liquid source.

It should be noted herein that the battery devices shown in the drawings and described in this specification are only a few examples of the wide variety of battery devices that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any details or any components of the battery device shown in the drawings or described in this specification.

For example, as shown in fig. 1, in an embodiment of the present utility model, the battery device further includes a case 500, where the case 500 is used to house a battery pack, and the battery pack includes the plurality of battery assemblies a described above.

In summary, the battery device according to the present utility model includes at least two battery assemblies a, where the battery assemblies a include a bracket 100, a battery 200, and a heat exchange plate 300, the bracket 100 is provided with a first accommodating groove 110 and a second accommodating groove 120, the battery 200 is accommodated in the first accommodating groove 110, the heat exchange plate 300 is accommodated in the second accommodating groove 120, the heat exchange plate 300 is located on a first surface of the battery 200 perpendicular to the first direction X, and a surface area of the first surface is larger than a surface area of any other surface of the battery 200. Through the above structural design, the utility model can be applied to a heat exchange scheme of large-area heat exchange, and the battery 200 and the heat exchange plate 300 are simultaneously accommodated by using one bracket 100, so that the alternating arrangement of a plurality of batteries 200 and the heat exchange plate 300 in the large-area heat exchange scheme can be realized. Moreover, the present utility model is advantageous in reducing the process complexity of the product due to the simple structure of the stand 100.

Exemplary embodiments of the battery device proposed by the present utility model are described and/or illustrated in detail above. Embodiments of the utility model are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," 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. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the utility model has been described in terms of various specific embodiments, those skilled in the art will recognize that the utility model can be practiced with modification within the spirit and scope of the claims.

Claims (14)

1. The battery device is characterized by comprising at least two battery assemblies arranged along a first direction, wherein each battery assembly comprises a bracket, a battery and a heat exchange plate, the bracket is provided with a first accommodating groove and a second accommodating groove respectively, the battery is accommodated in the first accommodating groove, the heat exchange plate is accommodated in the second accommodating groove and used for exchanging heat with the battery, the heat exchange plate is positioned on a first surface of the battery perpendicular to the first direction, and the surface area of the first surface is larger than the surface area of any other surface of the battery.

2. The battery device of claim 1, wherein the first and second receiving grooves are respectively opened at opposite sides of the bracket perpendicular to the first direction.

3. The battery device of claim 1, wherein the first receiving groove communicates with the second receiving groove.

4. The battery device according to claim 1, wherein the end portion of the heat exchange plate in the second direction exceeds the battery in the second direction, the second direction is perpendicular to the first direction, the end portion of the heat exchange plate in the second direction is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are respectively communicated with the flow channels of the heat exchange plate, the liquid inlets of two adjacent heat exchange plates are communicated through a first communication structure, the liquid outlets of two adjacent heat exchange plates are communicated through a second communication structure, and the first communication structure and the second communication structure are respectively arranged in the bracket.

5. The battery device according to claim 4, wherein each group of the first communication structures comprises a first communication duct, a first communication accommodating groove and a first communication joint, the first communication joints are respectively arranged at openings on two opposite sides of the two heat exchange plates of two adjacent battery assemblies along the first direction, the first communication accommodating grooves are respectively arranged at two opposite sides of the bracket perpendicular to the first direction, the two first communication accommodating grooves respectively accommodate the two first communication joints, and the first communication duct penetrates through bottoms of the two first communication accommodating grooves so as to communicate the two first communication accommodating grooves.

6. The battery device according to claim 5, wherein a first seal groove is provided in a groove wall of the first communication accommodation groove, and a first seal ring is provided in the first seal groove, the first seal ring being for sealing the first communication joint.

7. The battery device according to claim 4, wherein each group of the second communication structures comprises a second communication duct, a second communication accommodating groove and a second communication joint, the second communication joints are respectively arranged at two side openings of the two heat exchange plates of two adjacent battery assemblies along the first direction, the second communication accommodating grooves are respectively arranged at two opposite sides of the bracket perpendicular to the first direction, the two second communication accommodating grooves respectively accommodate the two second communication joints, and the second communication duct penetrates through the bottoms of the two second communication accommodating grooves so as to communicate the two second communication accommodating grooves.

8. The battery device according to claim 7, wherein a second seal groove is provided in a groove wall of the second communication accommodation groove, and a second seal ring is provided in the second seal groove, the second seal ring being for sealing the second communication joint.

9. The battery device according to claim 1, wherein one side surface of the bracket perpendicular to the first direction is provided with a positioning recess, the other side surface of the bracket perpendicular to the first direction is provided with a positioning projection, the position of the positioning projection corresponds to the position of the positioning recess, and the positioning projection of one of the adjacent two brackets is accommodated in the recess of the other one.

10. The battery device according to claim 1, wherein each of the brackets is provided with a mounting hole penetrating the bracket in the first direction, the mounting holes are located at positions where the brackets are not provided with the first accommodation groove and the second accommodation groove, the positions of the mounting holes of the brackets respectively correspond, and the battery device further comprises a connecting rod penetrating the mounting holes of the brackets in sequence to connect the brackets.

11. The battery device according to claim 1, wherein the battery is adhesively fixed in the first accommodation groove via a structural adhesive, and/or the heat exchange plate is adhesively fixed in the second accommodation groove via a structural adhesive, and/or a heat-conducting adhesive is provided between the adjacent battery and the heat exchange plate; wherein, glue overflow groove has been seted up to the cell wall of second holding tank.

12. The battery device of claim 11, wherein the second receiving groove has a corner portion, and the glue overflow groove is opened at a corner of the groove wall corresponding to the corner portion.

13. The battery device according to claim 1, wherein the heat exchange plate has a flow passage having an elliptical cross section.

14. The battery device according to claim 1, wherein in the two brackets located at both ends in the first direction, a surface of one of which facing away from the other and a surface of the other facing away from the one are respectively provided with cover plates.