CN213905489U - Heat conducting pad and battery module - Google Patents

Abstract

The utility model provides a heat conducting pad and a battery module, relating to the technical field of batteries, wherein the heat conducting pad comprises a thin film layer and an elastic layer; the elastic layer is arranged on one side of the thin film layer and comprises a plurality of groups of convex parts, and gaps are formed between every two adjacent groups of convex parts; the extending direction of the gap and the arrangement direction of the plurality of groups of the convex parts form an angle. The battery module includes a thermal pad. Through this heat conduction pad, solved among the prior art heat conduction pad expand the back, form inhomogeneous bounce in the module bottom, cause the technical problem of harmful effects such as the too big stress of bus bar, the too big stress of cooling plate.

Description

Heat conducting pad and battery module

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a heat conduction pad and battery module are related to.

Background

In the prior art, a cooling plate for exchanging heat with the battery module is arranged in the battery module, both the cooling plate and the battery module can be fixed on a module support, and a heat conducting pad is usually arranged between the cooling plate and the battery module due to the fact that a gap is reserved between the cooling plate and the battery module, so that heat exchange efficiency is improved.

Generally, the heat conducting pad is made of low-hardness rubber, the volume elasticity rate of the material is high, and the heat conducting pad can expand in a certain transverse direction when being compressed. The heat conduction pad transversely expands too much, produces inhomogeneous bounce to module bottom (or electric core bottom), causes harmful effects such as the too big stress of Busbar (aluminium bar), the too big stress of cooling plate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat conduction pad and battery module to alleviate among the prior art heat conduction pad and expand the back, form unequal bounce in the module bottom, cause the technical problem of harmful effects such as the too big stress of bus bar, the too big stress of cooling plate.

In a first aspect, the present invention provides a thermal pad, including: a film layer and an elastic layer;

the elastic layer is arranged on one side of the thin film layer and comprises a plurality of groups of convex parts, and gaps are formed between every two adjacent groups of convex parts;

the extending direction of the gaps and the arrangement direction of the multiple groups of the protrusions form an angle.

Further, the extending direction of the gap is perpendicular to the arrangement direction of the plurality of groups of the convex parts.

Further, the width of the gap is matched with the distance between two adjacent groups of battery cells.

And/or the shape of the bulge is matched with that of the battery cell.

Further, the thin film layer and the protruding part are both of cuboid thin-layer structures;

the multiple groups of the protrusions are arranged along the length direction of the film layer;

the gap extends along the width direction of the film layer.

Furthermore, the thin film layer is made of polyimide;

and/or the elastic layer is made of silicon rubber.

Further, the sum of the maximum thicknesses of the film layer and the elastic layer is 2-3 mm.

Has the advantages that:

the utility model provides a heat conduction pad, form the clearance between two sets of adjacent bellyings, the extending direction in clearance is the angle setting with the direction of arranging of multiunit bellyings, the existence in this clearance has provided the reservation extension space for heat conduction pad's elastic deformation, produces badly when avoiding heat conduction pad horizontal (being multiunit bellyings arrange the direction) to expand, and then reduces Busbar stress and cooling plate stress; meanwhile, due to the arrangement, on the basis of not influencing heat exchange, the weight of the heat conducting pad can be reduced, and the light weight of the heat conducting pad is realized.

In a second aspect, the present invention provides a battery module, including: the heat conducting pad.

Further, the battery module comprises a battery core and a water cooling plate; the heat conducting pad is clamped between the battery cell and the water cooling plate.

Further, the battery cells are arranged in a plurality of numbers, and the arrangement direction of the plurality of battery cells is the same as that of the plurality of groups of protrusions;

the heat conducting pad is shared by a plurality of battery cores.

Further, the battery module comprises a shell and an upper cover plate, and the shell and the upper cover plate enclose a space for installing a battery core;

the heat conducting pad is fixedly connected to the shell and is arranged opposite to the upper cover plate.

Has the advantages that:

the utility model provides a battery module includes aforementioned heat conduction pad, and the technological advantage and the effect that this battery module can reach include technological advantage and effect that this heat conduction pad can reach equally from this, no longer gives unnecessary details here.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a thermal pad according to an embodiment of the present invention;

fig. 2 is a side view of a thermal pad according to an embodiment of the present invention;

fig. 3 is a schematic reverse side view of a thermal pad according to an embodiment of the present invention;

fig. 4 is a schematic front view of a thermal pad according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a battery module according to an embodiment of the present invention at a first viewing angle;

fig. 6 is a schematic structural diagram of a battery module according to an embodiment of the present invention at a second viewing angle, in which the heat conducting pad is not shown;

fig. 7 is a schematic structural diagram of a battery module according to an embodiment of the present invention at a third viewing angle.

Icon:

10-a battery module; 11-electric core; 12-a housing; 13-upper cover plate;

100-a thin film layer;

200-an elastic layer; 210-a boss; 220-gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The present embodiment provides a thermal pad, as shown in fig. 1 to 4, the thermal pad includes a thin film layer 100 and an elastic layer 200; the elastic layer 200 is arranged on one side of the film layer 100, the elastic layer 200 comprises a plurality of groups of convex parts 210, and a gap 220 is formed between every two adjacent groups of convex parts 210; the extending direction of the gap 220 is disposed at an angle to the arrangement direction of the plurality of sets of protrusions 210.

In the heat conduction pad provided by the embodiment, the gap 220 is formed between two adjacent groups of the protrusions 210, the extending direction of the gap 220 is perpendicular to the arrangement direction of the multiple groups of the protrusions 210, and the existence of the gap 220 provides a reserved extension space for the elastic deformation of the heat conduction pad, so that the heat conduction pad is prevented from generating poor stress when being transversely unfolded (i.e. the arrangement direction of the multiple groups of the protrusions 210), and further the Busbar stress and the cooling plate stress are reduced; meanwhile, due to the arrangement, on the basis of not influencing heat exchange, the weight of the heat conducting pad can be reduced, and the light weight of the heat conducting pad is realized.

In this embodiment, the extending direction of the gap 220 is perpendicular to the arrangement direction of the plurality of sets of protrusions 210, so that the heat conducting pad can be better matched with the existing battery module.

In other embodiments, the angle between the extending direction of the gap 220 and the arrangement direction of the plurality of sets of protrusions 210 may be 80 to 120 °, and for example, the angle between the extending direction of the gap 220 and the arrangement direction of the plurality of sets of protrusions 210 is 80 °, 90 °, 100 °, 110 °, 120 °, or the like.

In this embodiment, the width of clearance 220 and the distance looks adaptation between two sets of adjacent electric cores 11, so set up, the heat that the electric core 11 of being convenient for produced is to clearance 220 department diffusion, and the electric core 11 of being convenient for dispels the heat.

It should be noted that, the battery module generally has a plurality of battery cores 11 to constitute, and the interval sets up between battery core 11 and the battery core 11.

Further, the shape of the protruding portion 210 is matched with the shape of the battery cell 11, so that the protruding portion 210 can apply uniform supporting force to all places of the battery cell 11, and the battery cell 11 can be better supported. As shown in fig. 1, the number of the protruding portions 210 is equal to the number of the battery cells 11, and specifically, the number of the protruding portions 210 and the shape of the protruding portions 210 may be appropriately adjusted according to the number of the battery cells 11.

In one embodiment of the present application, as shown in fig. 1 and 3, the thin film layer 100 and the protrusions 210 are each a rectangular parallelepiped thin layer structure; the sets of protrusions 210 are arranged along the length of the film layer 100; the gap 220 extends along the width direction of the film layer 100; generally, the battery cell 11 is mostly of a rectangular parallelepiped structure, and the film layer 100 and the protrusion 210 are both of rectangular parallelepiped structure, and can be better matched with the battery cell 11.

In this embodiment, the material of the thin film layer 100 is Polyimide (PI); the elastic layer 200 is made of silicon rubber.

Wherein, the sum of the maximum thicknesses of the thin film layer 100 and the elastic layer 200 is 2mm to 3mm, the thickness of the thermal pad is reduced as much as possible on the basis of realizing the thermal conduction to save materials and reduce the cost, and the sum of the maximum thicknesses of the thin film layer 100 and the elastic layer 200 is 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, or the like, for example.

The present embodiment further provides a battery module, as shown in fig. 5 to 7, including the thermal pad of the foregoing embodiment. The battery module provided by the embodiment includes the thermal pad, and the technical advantages and effects that can be achieved by the battery module also include the technical advantages and effects that can be achieved by the thermal pad, which are not described herein again.

Specifically, as shown in fig. 6, the battery module includes a battery cell 11 and a water cooling plate (not shown in the drawings); the heat conducting pad is clamped between the battery cell 11 and the water cooling plate to improve the heat exchange efficiency.

Further, as shown in fig. 6 and 7, the battery cells 11 are provided in plural, and the arrangement direction of the plural battery cells 11 is the same as the arrangement direction of the plural sets of protrusions 210; a plurality of electric cores 11 sharing heat conduction pad, so set up, the number of reducible heat conduction pad, the processing preparation of the heat conduction pad of being convenient for, simultaneously, the battery module of a plurality of electric cores 11 formation is in order to satisfy user's different user demands.

Exemplarily, the battery module may include 10 to 20 cells, and correspondingly, the elastic layer 200 is provided with 10 to 20 protrusions 210.

As shown in fig. 6, the battery module 10 includes a housing 12 and an upper cover plate 13, the housing 12 and the upper cover plate 13 enclosing a space for mounting the battery cell 11; the heat conducting pad is fixedly connected to the shell 12 and is arranged opposite to the upper cover plate 13, and the heat conducting pad is arranged at the bottom end of the lower-layer battery module to realize heat dissipation of the bottom end of the battery cell 11 in the lower-layer battery module.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A thermal pad, comprising: a film layer (100) and an elastic layer (200);

the elastic layer (200) is arranged on one side of the thin film layer (100), the elastic layer (200) comprises a plurality of groups of protrusions (210), and a gap (220) is formed between every two adjacent groups of protrusions (210);

the extending direction of the gaps (220) and the arrangement direction of the multiple groups of the convex parts (210) form an angle.

2. The heat transfer pad of claim 1, wherein the gaps (220) extend in a direction perpendicular to the arrangement direction of the plurality of sets of protrusions (210).

3. The thermal pad according to claim 1, wherein the width of the gap (220) is adapted to the distance between two adjacent sets of cells (11);

and/or the shape of the bulge (210) is matched with the shape of the battery cell (11).

4. The thermal pad according to claim 3, wherein the film layer (100) and the protrusions (210) are each a rectangular parallelepiped sheet structure;

the multiple groups of the protrusions (210) are arranged along the length direction of the film layer (100);

the gap (220) extends in the width direction of the film layer (100).

5. The thermal pad of claim 1, wherein the thin film layer (100) is made of polyimide;

and/or the elastic layer (200) is made of silicon rubber.

6. A thermal pad according to any one of claims 1 to 5, wherein the sum of the maximum thicknesses of the film layer (100) and the elastic layer (200) is 2mm to 3 mm.

7. A battery module, comprising: the thermal pad of any of claims 1-6.

8. The battery module according to claim 7, characterized in that the battery module (10) comprises a cell (11) and a water-cooling plate; the heat conducting pad is clamped between the battery cell (11) and the water cooling plate.

9. The battery module according to claim 8, wherein the battery cells (11) are provided in a plurality, and the arrangement direction of the plurality of battery cells (11) is the same as the arrangement direction of the plurality of sets of protrusions (210);

the heat conducting pad is shared by a plurality of battery cores (11).

10. The battery module according to any one of claims 7 to 9, characterized in that the battery module (10) comprises a housing (12) and an upper cover plate (13), the housing (12) and the upper cover plate (13) enclosing a space for mounting the battery cells (11);

the heat conducting pad is fixedly connected to the shell (12) and is opposite to the upper cover plate (13).

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