CN217822993U - Battery and battery device - Google Patents

Abstract

The embodiment of the utility model provides a relate to battery technical field, and disclose a battery and battery device, the battery includes body and bulge, and the protruding terminal surface of locating the body of bulge, the terminal surface of body and the lateral wall face of bulge form the holding tank, and the holding tank is used for holding at least partial heat transfer structure. The accommodating groove used for accommodating at least part of the heat exchange structure is formed on the end face of the body and the side wall face of the protruding portion, so that the heat exchange structure can be more fully contacted with the battery, the heat dissipation performance is improved, and the battery is more conveniently assembled and fixed with the heat exchange structure in the accommodating groove in the at least part of the heat exchange structure.

Description

Batteries and battery devices

technical field

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

Background technique

At present, the energy storage performance of new energy batteries is getting higher and higher. During use, due to high-rate charge and discharge, the temperature of the battery will rise too high, which will affect its performance and life. If the temperature rise cannot be effectively dealt with, it may even cause Thermal runaway, causing the battery to short circuit or explode. However, the heat dissipation performance of the battery in the related art is not good, which affects the reliability of the battery operation.

Utility model content

The embodiment of the utility model provides a battery and a battery device capable of improving the heat dissipation performance of the battery.

The battery of the embodiment of the utility model includes a body and a protruding portion, the protruding portion protrudes from the end face of the body, the end face of the body and the side wall surface of the protruding portion form a receiving groove, and the receiving groove is used for To accommodate at least part of the heat exchange structure.

The battery device of the embodiment of the present invention includes a plurality of the above-mentioned batteries, a plurality of busbars and a heat exchange structure, and a plurality of the above-mentioned batteries are arranged side by side; a plurality of busbars are arranged on one side of the plurality of batteries, and connected The pole assembly of a plurality of batteries; the heat exchange structure at least part of the heat exchange structure is accommodated in the accommodation groove of the battery, and is thermally connected to the groove wall of the accommodation groove.

One embodiment of the above-mentioned utility model has at least the following advantages or beneficial effects:

In the battery and the battery device of the embodiment of the present invention, accommodating grooves for accommodating at least part of the heat exchange structure are formed on the end surface of the body and the side wall surface of the protrusion, so that the heat exchange structure can be more fully in contact with the battery, improving the battery life. Heat dissipation performance, and at least part of the heat exchange structure is arranged in the receiving groove, which is also more convenient for the assembly and fixation of the battery and the heat exchange structure.

Description of drawings

FIG. 1 shows a schematic perspective view of a battery device according to an embodiment of the present invention.

FIG. 2 shows an exploded schematic view of FIG. 1 .

FIG. 3 shows a schematic perspective view of the battery in FIG. 1 .

FIG. 4 shows a partially enlarged view at X1 in FIG. 3 .

FIG. 5 shows a schematic diagram of removing the heat exchange structure in FIG. 1 .

FIG. 6 shows a partially enlarged view at X2 in FIG. 5 .

FIG. 7 shows a schematic side view of FIG. 1 .

FIG. 8 shows a partially enlarged view at X3 in FIG. 7 .

Fig. 9 shows a schematic diagram of an insulating layer and a heat conducting layer disposed between the heat exchange structure and the battery.

Fig. 10 is a schematic diagram showing the assembly of the battery with the flange structure and the heat exchange structure in the first embodiment of the present invention.

Fig. 11 is a schematic diagram showing the assembly of the battery with the flange structure and the heat exchange structure in the second embodiment of the present invention.

Fig. 12 is a schematic diagram showing the assembly of the battery with the flange structure and the heat exchange structure in the third embodiment of the present invention.

Wherein, the reference signs are explained as follows:

100. Battery device

1. Battery

11. Ontology

12. Protruding part

13. Pole assembly

14. Flange structure

15. Storage tank

16. Installation channel

17. Avoidance groove

2. Busbar

21. Arched part

22. Electrode connection part

3. Heat exchange structure

31. Substrate part

32. Extension

33. The first runner

34. Second runner

35. Insulation layer

36. Groove

41. The first thermally conductive adhesive layer

42. Heat conduction parts

43. The second thermally conductive adhesive layer

44. The third thermally conductive adhesive layer

45. Heat conduction layer

L. Length

W, width

T. Thickness

D1, the first direction

D2, the second direction

D3, the third direction

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, 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 incorporate the concepts of example embodiments. communicated to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

As shown in FIG. 1 and FIG. 2 , FIG. 1 shows a schematic perspective view of a battery device 100 according to an embodiment of the present invention. FIG. 2 shows an exploded schematic view of FIG. 1 . The battery device 100 of the embodiment of the present invention includes a plurality of batteries 1 , a plurality of bus bars 2 and a heat exchange structure 3 . A plurality of batteries 1 are arranged side by side, and a plurality of busbars 2 are connected to the plurality of batteries 1 to connect the plurality of batteries 1 in series. The heat exchange structure 3 is thermally connected to multiple batteries 1 and/or multiple bus bars 2 to cool the batteries 1 and bus bars 2 .

It can be understood that the terms "comprising" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or components inherent in those processes, methods, products, or devices.

As shown in FIG. 3 and FIG. 4 , FIG. 3 shows a schematic perspective view of the battery 1 in FIG. 1 . FIG. 4 shows a partially enlarged view at X1 in FIG. 3 . Each battery 1 includes a body 11 , a protruding portion 12 and a pole assembly 13 .

The protruding portion 12 protrudes from the end surface of the main body 11 . The end surface of the main body 11 and the side wall of the protruding portion 12 form a receiving groove 15 for accommodating at least part of the heat exchange structure 3 .

By forming an accommodating groove 15 for accommodating at least part of the heat exchange structure 3 on the end surface of the body 11 and the side wall surface of the protrusion 12, the heat exchange structure 3 can be more fully in contact with the battery 1 to improve heat dissipation performance, and At least part of the heat exchange structure 3 is disposed in the receiving groove 15 , which is also more convenient for the assembly and fixing of the battery 1 and the heat exchange structure 3 .

As an example, the battery 1 has a length L along a first direction D1, a width W along a second direction D2, and a thickness T along a third direction D3. The first direction D1 , the second direction D2 and the third direction D3 are perpendicular to each other. The length L can be much larger than the width W and thickness T, so that the battery 1 forms a substantially flat cuboid.

Of course, in other embodiments, the length L of the battery 1 may also be slightly larger than the width W and thickness T, so that the battery 1 forms a cuboid with a slightly thicker thickness T.

A plurality of batteries 1 are arranged side by side along the third direction D3, and two adjacent batteries 1 have large surfaces corresponding to each other. It can be understood that the large surface of the battery 1 refers to the side surface of the battery 1 with the largest area. Specifically in this embodiment, the large surface of the battery 1 refers to the surface formed by the length L and the width W.

Please continue to refer to FIG. 3 and FIG. 4 , the protruding portion 12 protrudes from the end surface of the main body 11 along the first direction D1 . Along the second direction D2, two opposite sides of the protruding portion 12 are provided with receiving grooves 15 . The two receiving grooves 15 are used to accommodate both ends of the heat exchange structure 3 along the second direction D2, which facilitates the fixed assembly of the heat exchange structure 3 and the two ends of the battery 1 along the second direction D2.

It can be seen from FIG. 1 that after a plurality of batteries 1 are arranged side by side, the plurality of accommodation grooves 15 on the same side of the plurality of batteries 1 are arranged correspondingly and communicate with each other, so that the plurality of accommodation grooves 15 on the same side form an installation channel. 16 , the installation channel 16 is used to accommodate at least part of the heat exchange structure 3 .

The pole assembly 13 is connected to the protruding portion 12 , and along the protruding direction of the protruding portion 12 , the pole assembly 13 is staggered from the receiving groove 15 .

As an example, a large surface of one side of the protruding portion 12 is flush with a large surface of the body 11 , and the pole assembly 13 is protruded from the large surface of the protruding portion 12 . An escape groove 17 is formed between the other large surface of the protruding portion 12 and the end surface of the body 11 , and the escape groove 17 can communicate with the receiving groove 15 . When multiple batteries 1 are arranged side by side, the escape groove 17 is used to avoid the pole assembly 13 of another adjacent battery 1 .

As shown in FIG. 5 , FIG. 5 shows a schematic diagram of removing the heat exchange structure 3 in FIG. 1 . The plurality of busbars 2 are disposed on one side of the battery 1 along the first direction D1 and connected to the pole assemblies 13 of the plurality of batteries 1 .

Specifically, the plurality of bus bars 2 located on one side of the plurality of batteries 1 along the first direction D1 are arranged side by side along the arrangement direction of the batteries 1 . Two ends of each bus bar 2 are respectively connected to pole assemblies 13 of two adjacent batteries 1 .

As shown in FIG. 6 , FIG. 6 shows a partially enlarged view at X2 in FIG. 5 . Along the first direction D1, the bus bar 2 is offset from the receiving groove 15 of the battery 1 . The bus bar 2 includes an arched portion 21 and two electrode connecting portions 22 , and the two electrode connecting portions 22 are respectively connected to two opposite sides of the arched portion 21 . The two electrode connecting parts 22 are respectively connected to the pole assemblies 13 of two adjacent batteries 1 . Along the first direction D1 , the arched portion 21 is disposed corresponding to the protruding portion 12 of the battery 1 .

Please continue to refer to FIG. 2 , the heat exchange structure 3 is disposed on one side of the battery 1 along the first direction D1 . Part of the heat exchange structure 3 is disposed on the side of the bus bar 2 away from the battery 1 , and is thermally connected to the battery 1 and/or the bus bar 2 . Part of the heat exchange structure 3 is accommodated in the accommodation groove 15 of the battery 1 .

On the one hand, the heat exchange structure 3 is arranged on the side of the plurality of batteries 1, so that the arrangement of the heat exchange structure 3 does not occupy the space on the top and bottom of the plurality of batteries 1, which improves the space utilization rate in the height direction. On the other hand, since the pole assembly 13 of the battery 1 generates more heat than other locations, the heat exchange structure 3 is connected to the battery 1 and/or the bus bar 2 through heat conduction, so that the heat exchange structure 3 can heat the battery 1 and the bus bar 2. The/or bus bar 2 dissipates heat, which effectively solves the problem of excessive temperature rise in the vicinity of the pole assembly 13 of the battery 1 and the bus bar 2 . On the other hand, the heat exchange structure 3 is not arranged at the bottom of multiple batteries 1, so that the heat exchange structure 3 does not need to bear the weight of the batteries 1, which improves the reliability of the heat exchange structure 3 and prolongs the service life.

It can be understood that the heat exchange structure 3 can adopt air cooling or liquid cooling. When the heat exchange structure 3 is cooled by liquid, the heat exchange structure 3 may include a liquid cooling plate, and cooling liquid is provided inside the liquid cooling plate.

As shown in FIGS. 7 and 8 , FIG. 7 shows a schematic side view of FIG. 1 . FIG. 8 shows a partially enlarged view at X3 in FIG. 7 . The heat exchange structure 3 includes a base plate portion 31 and two extension portions 32 . The substrate portion 31 is disposed on a side of the bus bar 2 away from the battery 1 . The two extension portions 32 are respectively connected to two opposite ends of the base portion 31 along the second direction D2 of the battery 1 , and respectively extend from the base portion 31 to the interior of the two receiving grooves 15 . Each extension 32 is perpendicular to the base plate 31, that is to say, the base plate 31 and the two extensions 32 form a roughly C-shaped structure, which can increase the heat exchange area of the heat exchange structure 3 and improve the heat dissipation efficiency .

The side of the heat exchange structure 3 facing away from the battery 1 is a plane. Since the heat exchange structure 3 is disposed on the side of the plurality of batteries 1 , it is equivalent to covering the side ends of the plurality of batteries 1 . By designing the side of the heat exchange structure 3 facing away from the battery 1 as a plane, the surface of the heat exchange structure 3 has better consistency, which is more convenient for the batteries 1 to be grouped, and facilitates the assembly of other components in the battery device 100 .

Specifically, the side of the substrate portion 31 facing away from the battery 1 may be a plane, and the side of each extension portion 32 facing away from the battery 1 is also a plane.

Continuing to refer to FIG. 8 , the heat exchange structure 3 has a first flow channel 33 and a second flow channel 34 inside. Along the first direction D1 , the first flow channel 33 is arranged corresponding to the bus bar 2 , and the second flow channel 34 is arranged corresponding to the area of the battery 1 not covered by the bus bar 2 . The flow area of the first flow channel 33 is smaller than the flow area of the second flow channel 34 .

It can be understood that the temperature rise of the bus bar 2 is higher than that of the battery 1 . In this embodiment, the flow area of the first flow channel 33 is smaller than the flow area of the second flow channel 34, so that the flow rate of the coolant passing through the first flow channel 33 will be greater than the flow rate of the coolant passing through the second flow channel 34, so that The heat exchange efficiency of the first channel 33 corresponding to the bus bar 2 is higher, which is beneficial to timely cooling the bus bar 2 with a higher temperature rise.

Along the first direction D1 , the size L1 of the first flow channel 33 is smaller than the size L2 of the second flow channel 34 , which is more convenient for processing and manufacturing the heat exchange structure 3 .

As shown in FIG. 9 , FIG. 9 shows a schematic diagram of an insulating layer 35 and a heat conducting layer 45 disposed between the heat exchange structure 3 and the battery 1 . An insulating layer 35 is provided on the surface of the heat exchange structure 3 facing the bus bar 2 . By arranging the insulating layer 35 between the heat exchange structure 3 and the bus bar 2, the electrical connection between the bus bar 2 and the heat exchange structure 3 can be prevented, causing safety problems.

It can be understood that the insulating layer 35 may be an insulating film, but not limited thereto.

As an example, the insulating layer 35 is disposed on a side surface of the substrate portion 31 of the heat exchange structure 3 facing the bus bar 2 .

The heat exchange structure 3 is connected to the bus bar 2 and/or the battery 1 through a heat conducting layer 45 . The heat conduction layer 45 may include heat conduction adhesive, heat conduction silica gel pad, and the like. When the heat-conducting layer 45 is heat-conducting adhesive, the heat-conducting adhesive can not only fix the heat-exchanging structure 3 , but also act as a heat-conducting medium to transfer the heat generated by the bus bar 2 and/or the battery 1 to the heat-exchanging structure 3 in time.

Specifically, a heat conduction layer 45 is provided between the substrate portion 31 of the heat exchange structure 3 and the area where the protruding portion 12 of the battery 1 is not covered by the bus bar 2 , and a heat conduction layer 45 is provided between the substrate portion 31 and the bus bar 2 A heat conducting layer 45 is also provided between the extension portion 32 and the groove wall of the receiving groove 15 .

As shown in FIG. 10 , FIG. 10 shows a schematic diagram of the assembly of the battery 1 with the flange structure 14 and the heat exchange structure 3 in the first embodiment of the present invention. The battery 1 further includes a flange structure 14 protruding from the body 11 .

As an example, the flange structure 14 surrounds the outer circumference of the main body 11 and the protruding portion 12 within the plane formed by the first direction D1 and the second direction D2.

The side of the heat exchange structure 3 facing the battery 1 is provided with a groove 36 , along the protruding direction of the flange structure 14 , the groove 36 accommodates at least part of the flange structure 14 . When the heat exchange structure 3 is installed on one side of the battery 1, the flange structure 14 of the battery 1 can extend into the groove 36 of the heat exchange structure 3, so that the side of the heat exchange structure 3 facing the battery 1 can be connected with the battery 1. side profile fit. On the basis of ensuring that the heat exchange structure 3 is firmly connected, the heat conduction efficiency between the heat exchange structure 3 and the battery 1 /bus bar 2 can also be improved.

As shown in FIG. 11 , FIG. 11 shows a schematic diagram of the assembly of the battery 1 with the flange structure 14 and the heat exchange structure 3 in the second embodiment of the present invention. There is a first thermally conductive adhesive layer 41 between the outer surface of the protruding portion 12 of the battery 1 and the heat exchange structure 3 , and the thickness of the first thermally conductive adhesive layer 41 is greater than or equal to the protruding height of the flange structure 14 .

Through the design that the thickness of the first thermally conductive adhesive layer 41 is greater than or equal to the protruding height of the flange structure 14, the heat exchange structure 3 can be closely connected to the battery 1 through the first thermally conductive adhesive layer 41, avoiding the heat transfer caused by the first thermally conductive adhesive layer. The thickness of 41 is lower than the protruding height of the flange structure 14, and there are holes/gaps between the heat exchange structure 3 and the battery 1, thereby affecting the heat conduction efficiency.

As shown in FIG. 12 , FIG. 12 shows a schematic diagram of the assembly of the battery 1 with the flange structure 14 and the heat exchange structure 3 in the third embodiment of the present invention. There is a heat conducting member 42 between the outer surface of the protruding portion 12 of the battery 1 and the heat exchange structure 3 , and the heat exchanging structure 3 and the protruding portion 12 are connected through the heat conducting member 42 . There is a second thermally conductive adhesive layer 43 between the thermally conductive element 42 and the outer surface of the protrusion 12 , and a third thermally conductive adhesive layer 44 is located between the thermally conductive element 42 and the heat exchange structure 3 . The sum of the thicknesses of the second heat-conducting adhesive layer 43 and the heat-conducting member 42 is greater than or equal to the protruding height of the flange structure 14 .

When the protruding height of the flange structure 14 is relatively high, for example reaching 2, 3 mm or more, due to the fluidity of the thermally conductive adhesive itself, the thermally conductive adhesive will not be stably fixed on the protruding part 12 before the thermally conductive adhesive is cured. Between the thermal structures 3 , due to its own gravity, the thermally conductive adhesive will flow to other positions of the battery 1 , causing the thermally conductive adhesive layer between the outer surface of the protruding part 12 and the heat exchange structure 3 to fail to meet the requirements of the flange structure 14 . The protruding height leads to the fact that the thermally conductive adhesive layer cannot be fully filled between the protruding portion 12 and the heat exchange structure 3 .

In the third embodiment of the present utility model, by setting the heat-conducting member 42 , the first heat-conducting adhesive layer 41 and the second heat-conducting adhesive layer 43 between the heat exchange structure 3 and the protruding portion 12 , the distance between the heat-conducting member 42 and the protruding portion 12 The first thermally conductive adhesive layer 41 is filled between them, and the second thermally conductive adhesive layer 43 is filled between the thermally conductive element 42 and the heat exchange structure 3 . Due to the arrangement of the heat conducting member 42 , the thicknesses of the first heat conducting adhesive layer 41 and the second heat conducting adhesive layer 43 can be reduced. When the thickness of the first thermally conductive adhesive layer 41 and the second thermally conductive adhesive layer 43 are relatively thin, it is not easy to generate flow, but it is stably filled in the predetermined position of the protruding part 12, thereby satisfying the requirements of the second thermally conductive adhesive layer 43 and the thermally conductive member. The sum of the thicknesses of 42 is greater than or equal to the protruding height of the flange structure 14, so as to avoid holes/gaps between the heat exchange structure 3 and the battery 1, thereby affecting the heat conduction efficiency.

It can be understood that the heat conducting element 42 may be a plate-like structure. The heat conducting member 42 can be made of materials such as graphite and carbon fiber.

Further, the thickness of the second thermally conductive adhesive layer 43 is smaller than the protrusion height of the flange structure 14 . In this way, along the protruding height direction of the flange structure 14 , at least part of the heat conducting element 42 does not exceed the flange structure 14 , ensuring the stability of the connection of the heat conducting element 42 .

It can be understood that the various embodiments/implementations provided by the present invention can be combined with each other without conflicts, and will not be illustrated here one by one.

In the utility model embodiment, the terms "first", "second", and "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or Two or more, unless otherwise expressly defined. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the utility model according to specific situations.

In the description of the utility model embodiment, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear" etc. The orientation or positional relationship is only for the convenience of describing the embodiment of the utility model and simplifying the description, and does not indicate or imply that the referred device or unit must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a Limitations of Utility Model Embodiments.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in the utility model. In at least one embodiment or example of an embodiment. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above are only preferred embodiments of the utility model embodiment, and are not intended to limit the utility model embodiment. For those skilled in the art, the utility model embodiment may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model embodiment shall be included in the protection scope of the utility model embodiment.

Claims (20)

1. A battery, comprising:

a body; and

the bulge is convexly arranged on the end face of the body, the end face of the body and the side wall face of the bulge form an accommodating groove, and the accommodating groove is used for accommodating at least part of the heat exchange structure.

2. The battery of claim 1, wherein the protrusion protrudes from the end surface of the body in a first direction;

along a second direction, the two opposite side surfaces of the protruding part are provided with the accommodating grooves;

wherein the second direction is perpendicular to the first direction.

3. The battery of claim 1, further comprising a post assembly connected to the protrusion and offset from the receiving groove in a direction of protrusion of the protrusion.

4. A battery device, comprising:

a plurality of the cells of any one of claims 1 to 3, arranged side by side;

a plurality of busbars disposed at one side of the plurality of batteries and connected to the plurality of batteries; and

and at least part of the heat exchange structure is accommodated in the accommodating groove of the battery and is in heat conduction connection with the groove wall of the accommodating groove.

5. The battery device according to claim 4, wherein the heat exchanging structure is disposed on one side of the plurality of batteries, and a part of the heat exchanging structure is disposed on one side of the bus bar facing away from the batteries and is thermally conductive connected to the batteries and/or the bus bar.

6. The battery device of claim 5, wherein the heat exchanging structure comprises:

the substrate part is arranged on one side of the bus bar, which is far away from the battery; and

and the two extending parts are respectively connected with the two ends of the edge of the base plate part and respectively extend towards the two accommodating grooves from the base plate part.

7. The battery device according to claim 6, wherein each of the extending portions is perpendicular to the base plate portion.

8. The battery device according to claim 5, wherein a surface of the heat exchanging structure facing the bus bar is provided with an insulating layer.

9. The battery device of claim 5, wherein the heat exchanging structure has a first flow channel and a second flow channel inside;

along the protruding direction of the protruding part of the battery, the first flow channel is arranged corresponding to the bus bar, and the second flow channel is arranged corresponding to the area of the battery which is not covered by the bus bar;

the flow area of the first flow passage is smaller than that of the second flow passage.

10. The battery device according to claim 9, wherein a dimension of the first flow channel is smaller than a dimension of the second flow channel in a projecting direction of the projection portion.

11. The battery device of claim 5, wherein the heat exchange structure is connected to the bus bar and/or the cells via a thermally conductive layer.

12. The battery device of claim 4, wherein the side of the heat exchange structure facing away from the battery is planar.

13. The battery device of claim 4, wherein the battery further comprises a flange structure protruding from the body.

14. The battery device of claim 13, wherein a side of the heat exchanging structure facing the battery is provided with a groove, and the groove receives at least a part of the flange structure along a protruding direction of the flange structure.

15. The battery device according to claim 13, wherein a first thermal adhesive layer is disposed between the outer surface of the protruding portion and the heat exchanging structure, and a thickness of the first thermal adhesive layer is greater than or equal to a protruding height of the flange structure.

16. The battery device according to claim 13, wherein a heat conducting member is provided between an outer surface of the protrusion and the heat exchanging structure, and the heat exchanging structure and the protrusion are connected by the heat conducting member;

a second heat-conducting adhesive layer is arranged between the heat-conducting piece and the outer surface of the protruding part, and a third heat-conducting adhesive layer is arranged between the heat-conducting piece and the heat exchange structure;

the sum of the thicknesses of the second heat-conducting adhesive layer and the heat-conducting piece is greater than or equal to the protruding height of the flange structure.

17. The battery device of claim 16, wherein the thickness of the second layer of thermally conductive adhesive is less than the protrusion height of the flange structure.

18. The battery device of claim 4, wherein the plurality of receiving slots on the same side of the plurality of batteries are in communication and form a mounting channel for receiving at least a portion of the heat exchanging structure.

19. The battery device according to claim 4, wherein the bus bar is misaligned with the receiving groove of the battery in a protruding direction of the protruding portion of the battery.

20. The battery device according to claim 19, wherein the bus bar comprises:

an arch part disposed corresponding to the protruding part of the battery; and

and the two electrode connecting parts are respectively connected to the pole assemblies of the two adjacent batteries.

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