CN217823040U - Battery device - Google Patents

Abstract

The embodiment of the utility model relates to the field of battery technology, and discloses a battery device, which includes a plurality of batteries, a plurality of busbars and a heat exchange structure. A plurality of batteries are arranged side by side, and a plurality of busbars are arranged on one side of the plurality of batteries and connected to the plurality of batteries. The heat exchange structure and the bus bar are located on the same side of the battery, and are thermally connected to the battery and the bus bar. The heat exchange structure is arranged on the sides of the plurality of batteries, so that the arrangement of the heat exchange structure does not occupy the space on the top and bottom of the plurality of batteries, and the space utilization rate in the height direction is improved. The heat exchange structure is connected to the battery and the bus bar through heat conduction, so that the heat exchange structure can dissipate heat from the battery and the bus bar at the same time, effectively solving the problem of excessive temperature rise near the pole assembly of the battery and the bus bar, and improving thermal safety performance . The heat exchange structure is not arranged at the bottom of multiple batteries, so that the heat exchange structure does not need to bear the weight of the batteries, which improves the reliability of the heat exchange structure and prolongs the service life.

Description

battery unit

technical field

The embodiment of the utility model relates to the field of battery technology, in particular, to 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 device capable of improving the heat dissipation performance of the battery.

The battery device of the embodiment of the utility model includes a plurality of batteries, a plurality of busbars and a heat exchange structure, and a plurality of batteries are arranged side by side; a plurality of busbars are arranged on one side of the plurality of batteries and connected to a plurality of The battery; the heat exchange structure is located on the same side of the battery as the bus bar, and is thermally connected to the battery and the bus bar.

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

In the battery device of the embodiment of the present utility model, the heat exchange structure is arranged on the side of multiple batteries, and is connected with the batteries and the bus bar through heat conduction. On the one hand, the heat exchange structure is arranged on the side of the plurality of batteries, so that the arrangement of the heat exchange structure does not occupy the space on the top and bottom of the plurality of batteries, and the space utilization rate in the height direction is improved. On the other hand, the heat exchange structure is connected to the battery and the bus bar through heat conduction, so that the heat exchange structure can dissipate heat from the battery and the bus bar at the same time, which effectively solves the problem of excessive temperature rise near the pole assembly of the battery and the bus bar, and improves thermal safety performance. On the other hand, the heat exchange structure is not arranged at the bottom of multiple batteries, so that the heat exchange structure does not need to bear the weight of the batteries, which improves the reliability of the heat exchange structure and prolongs the service life.

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

13. Pole assembly

14. Flange structure

17. Avoidance groove

2. Busbar

21. Arched part

22. Electrode connection part

3. Heat exchange structure

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 the multiple batteries 1 and the multiple bus bars 2 to dissipate heat from the batteries 1 and the 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 and a pole assembly 13 .

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.

As an example, the length L is 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, that is, two adjacent batteries 1 correspond to each other with a large surface. 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 pole assembly 13 is disposed at the end of the battery 1 along the first direction D1 , and protrudes from the large surface of the body 11 . There are two pole assemblies 13 , which are respectively disposed at two ends of the battery 1 along the first direction D1 . One pole assembly 13 serves as the positive pole, and the other pole assembly serves as the negative pole.

As an example, an escape groove 17 is formed on a side of the body 11 away from the pole assembly 13 , and the escape groove 17 is disposed at one end of the body 11 along the first direction D1 . 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 . 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 .

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 , that is, the heat exchange structure 3 and the bus bar 2 are located on the same side of the battery 1 . The heat exchange structure 3 is arranged on the side of the bus bar 2 away from the battery 1 , and is thermally connected with the battery 1 and the bus bar 2 .

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 the bus bar 2 through heat conduction, so that the heat exchange structure 3 can simultaneously heat the battery 1 and the bus bar. The row 2 conducts heat dissipation, 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, and improves thermal safety performance. 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 side of the heat exchange structure 3 facing away from the battery 1 is a plane. Since the heat exchange structure 3 is arranged on the side of multiple batteries 1, by designing the side of the heat exchange structure 3 facing away from the battery 1 as a plane, the surface consistency of the heat exchange structure 3 is better, which is more convenient for the battery 1 to be grouped, and it is convenient for the battery Assembly of other components in device 100.

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.

The heat exchange structure 3 is connected to the bus bar 2 and 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 the battery 1 to the heat-exchanging structure 3 in time.

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 .

In one embodiment, the flange structure 14 surrounds the outer periphery of the main body 11 within the plane formed by the first direction D1 and the second direction D2 of the battery 1 .

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 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 conduction member 42 between the outer surface of the battery 1 and the heat exchange structure 3 , and the heat exchange structure 3 and the battery 1 are connected through the heat conduction member 42 . There is a second thermally conductive adhesive layer 43 between the thermally conductive member 42 and the outer surface of the battery 1 , and a third thermally conductive adhesive layer 44 is provided between the thermally conductive member 42 and the heat exchange structure 3 . The sum of the thicknesses of the second thermally conductive adhesive layer 43 and the thermally conductive element 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, such as reaching 2 or 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 battery 1 and the heat exchange structure before the thermally conductive adhesive is cured. 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 battery 1 and the heat exchange structure 3 to be unable to meet the protrusion height greater than or equal to the flange structure 14, As a result, the thermally conductive adhesive layer cannot be fully filled between the battery 1 and the heat exchange structure 3 .

In the third embodiment of the present utility model, by setting a heat conduction member 42, a first heat conduction adhesive layer 41 and a second heat conduction adhesive layer 43 between the heat exchange structure 3 and the battery 1, the space between the heat conduction member 42 and the battery 1 is filled with the first A second thermally conductive adhesive layer 43 is filled between the thermally conductive adhesive layer 41 , 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 is relatively thin, it is not easy to generate flow, but it is stably filled in the predetermined position of the battery 1, thereby satisfying the requirements of the second thermally conductive adhesive layer 43 and the thermally conductive member 42. The sum of the thicknesses 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 (12)

1. A battery device, characterized in that, comprising: Multiple batteries arranged side by side; a plurality of bus bars arranged on one side of the plurality of batteries and connected to the plurality of batteries; and The heat exchange structure is located on the same side of the battery as the busbar, and is thermally connected to the battery and the busbar. 2. The battery device according to claim 1, wherein the heat exchange structure has a first flow channel and a second flow channel inside; Along a first direction, 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 not covered by the bus bar; The flow area of the first flow channel is smaller than the flow area of the second flow channel. 3. The battery device according to claim 2, wherein along the first direction, the size of the first flow channel is smaller than the size of the second flow channel. 4 . The battery device according to claim 1 , wherein an insulating layer is provided on a surface of the heat exchange structure facing the bus bar. 5. The battery device according to claim 1, wherein the heat exchange structure is connected to the bus bar and the battery through a heat conducting layer. 6 . The battery device according to claim 1 , wherein a side of the heat exchange structure facing away from the battery is a plane. 7. The battery device according to claim 1, wherein the battery comprises: Ontology; and a flange structure protruding from the body; The heat exchange structure is thermally connected to the body and the flange structure. 8. The battery device according to claim 7, wherein a groove is provided on the side of the heat exchange structure facing the battery, and along the protruding direction of the flange structure, the groove accommodates at least part of the flange structure. 9. The battery device according to claim 7, wherein there is a first thermally conductive adhesive layer between the outer surface of the battery and the heat exchange structure, and the thickness of the first thermally conductive adhesive layer is greater than or equal to the The protrusion height of the flange structure. 10. The battery device according to claim 7, wherein there is a heat conducting member between the outer surface of the battery and the heat exchange structure, and the heat exchange structure and the battery are connected through the heat conduction member ; There is a second thermally conductive adhesive layer between the thermally conductive member and the outer surface of the battery, and a third thermally conductive adhesive layer is provided between the thermally conductive member and the heat exchange structure; The sum of the thicknesses of the second heat-conducting adhesive layer and the heat-conducting element is greater than or equal to the protrusion height of the flange structure. 11. The battery device according to claim 10, wherein the thickness of the second thermally conductive adhesive layer is smaller than the protrusion height of the flange structure. 12. The battery device according to claim 1, wherein the heat exchange structure comprises a liquid cooling plate.

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