CN212392328U

CN212392328U - Battery module and car

Info

Publication number: CN212392328U
Application number: CN202020808135.1U
Authority: CN
Inventors: 鲁志佩; 贾辰飞; 王毅; 陈佳佳
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-01-22
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a battery module and an automobile, wherein the battery module comprises a structural adhesive layer, a filling piece and a plurality of battery cells which are arranged side by side; a reserved gap is arranged between every two adjacent electric cores, the port of the reserved gap is sealed by the structural adhesive layer, and the port of the reserved gap is sealed by the filling piece, so that the structural adhesive layer is prevented from permeating into the reserved gap; therefore, even if the port of the reserved gap is sealed by the structural adhesive layer, the structural adhesive layer cannot penetrate into the reserved gap, so that the battery cell is ensured to have a sufficient expansion space, and an important guarantee is provided for the service life of the battery cell.

Description

Battery module and car

Technical Field

The utility model relates to a technical scheme in electric core field, in particular to battery module and have car of this battery module.

Background

Among the present battery module, designed certain reservation clearance between electric core and the electric core and protected electric core, made it have certain inflation space when charging and discharging, and glue scribbles the pressfitting on it and when forming the structure glue film, the structure glue film can overflow into in this reservation clearance to influence the inflation of electric core, finally influence the life-span and the capacity of electric core.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module to solve the easy infiltration of current structure glue film and reserve the problem in clearance between electric core.

In order to solve the technical problem, the utility model provides a battery module, which comprises a plurality of electric cores, a structural adhesive layer and a filling piece which are arranged side by side, wherein reserved gaps are arranged between every two adjacent electric cores, and the structural adhesive layer is connected with the side surfaces of the electric cores and shields the ports of the reserved gaps; the filling piece is located between the structure adhesive layer and the battery core and plugged at the port of the reserved gap, and the filling piece is used for blocking the structure adhesive layer from permeating into the reserved gap.

In one embodiment, the filling member is a rubber strip extending along the opening of the clearance.

In one embodiment, the adhesive strip is an adhesive strip.

In one embodiment, the adhesive strip is a silicone strip.

In one embodiment, the adhesive strip is a rigid adhesive strip.

In one embodiment, the adhesive strip is a thixotropic adhesive, which is thixotropic and does not flow into the clearance during curing.

In one embodiment, the adhesive tape has flexibility to generate elastic deformation during the extrusion process to protect the battery core.

In the extending direction of the vertical distance between the adjacent electric cores, the extending size of the reserved gap is the width of the reserved gap; in one embodiment, the maximum dimension of the glue strip is greater than the width of the reserved gap; or the adhesive tape part extends into the reserved gap, or the adhesive tape is positioned outside the reserved gap.

In one embodiment, the filling member is an adhesive tape, and two opposite sides of the adhesive tape are respectively bonded and fixed with the battery cells on two sides of the reserved gap, so that the adhesive tape covers the reserved gap.

In one embodiment, the adhesive tape is a double-sided adhesive tape, and the double-sided adhesive tape is fixedly adhered to the structural adhesive layer.

In one embodiment, the filling member is a tampon arranged to extend along the end of the pre-gap.

In one embodiment, the tampon is cylindrical and has a cross-sectional diameter greater than the width of the pre-gap. Or the foam cotton strip is cuboid and is positioned outside the reserved gap and shields the port of the reserved gap.

The application also provides an automobile comprising the battery module in any one of the above embodiments.

The utility model has the advantages as follows:

because the filling piece blocks the port of the reserved gap and is used for blocking the structure adhesive layer from permeating into the reserved gap, even if the structure adhesive layer seals the port of the reserved gap, the structure adhesive layer cannot permeate into the reserved gap, so that the battery cell is ensured to have sufficient expansion space, and the service life of the battery cell is guaranteed.

Drawings

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

Fig. 1 is a schematic top view of a battery module according to a first embodiment of the present invention;

FIG. 2 is a schematic side view of the filling member of FIG. 1;

fig. 3 is a schematic top view of a battery module according to a second embodiment of the present invention;

FIG. 4 is a schematic side view of the strip of FIG. 3;

FIG. 5 is an enlarged view of part A of FIG. 3;

fig. 6 is a schematic top view of a battery module according to a third embodiment of the present invention;

FIG. 7 is a side view of the tape of FIG. 6;

FIG. 8 is an enlarged view of the portion B of FIG. 6;

fig. 9 is a schematic top view of a battery module according to a fourth embodiment of the present invention;

FIG. 10 is a schematic side view of the foam strip of FIG. 9;

fig. 11 is an enlarged structural view of a portion C of fig. 9.

The reference numbers are as follows:

10. a structural adhesive layer;

20. a filling member; 21. an adhesive tape; 22. an adhesive tape; 23. cotton sliver soaking;

30. an electric core;

40. reserving a gap; 41. a port.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

A first embodiment of the battery module is shown in fig. 1 to 2, and includes a structural adhesive layer 10, a filling member 20, and a plurality of battery cells 30 arranged side by side; reserved gaps 40 are arranged between every two adjacent electric cores 30; the structural adhesive layer 10 is connected to the side surfaces of the plurality of battery cells 30 and covers the reserved gaps 40, that is, covers the ports 41 of the reserved gaps 40; the filling member 20 is located between the structural adhesive layer 10 and the battery cell 30, and blocks the port 41 of the reserved gap 40, and the filling member 20 is used for blocking the structural adhesive layer 10 from penetrating into the reserved gap 40.

In this embodiment, the battery cells 30 are arranged from left to right, and each battery cell 30 is separated from each other, so that a reserved gap 40 is formed between adjacent battery cells 30, and the reserved gap 40 leaves a sufficient expansion space for the battery cells 30, thereby preventing the battery cells 30 from being damaged due to the compression expansion.

In this embodiment, the filling member 20 extends from top to bottom along the port 41 of the reserved gap 40, so that the filling member 20 is in a strip shape, and the reserved port 41 is completely sealed, so when the reserved port 41 is sealed by the structural adhesive layer 10, the structural adhesive layer 10 adheres to the outer surface of the battery cell 30, but cannot penetrate through the filling member 20 into the reserved gap 40.

It should be noted that, in fig. 1, the upper side and the lower side of the reserved space 40 are provided with ports 41, but since the upper side and the lower side ports 41 can be provided with the same structure, for convenience of description, fig. 1 only shows the blocking structure of the ports 41 on the lower side of the reserved space 40, that is, the upper side of the reserved space 40 can also be provided with the filling member 20 and the structural adhesive layer 10 for blocking.

The second embodiment of the battery module, which is shown in fig. 3 to 5, is substantially identical to the first embodiment of the battery module except that the filling member is a rubber strip 21, the rubber strip 21 is arranged to extend along a port 41 of the reserved space 40, and the use of the rubber strip 21 as the filling member is advantageous in terms of simplicity of processing and low cost. The adhesive tape 21 is thixotropic adhesive, has thixotropy, and cannot flow into the reserved gap in the curing process.

The adhesive tape 21 has various options, for example, the adhesive tape 21 can be set as an adhesive tape, that is, in the production process, the adhesive tape is formed by dispensing at the port 41 of the reserved gap 40 in a dispensing manner, and the adhesive tape not only can seal the port 41 of the reserved gap 40, but also can be conveniently bonded with the structural adhesive layer 10, that is, the bonding strength of the structural adhesive layer 10 is ensured.

In addition, in order to prevent the adhesive tape from penetrating into the reserved gap 40, the adhesive tape should be formed by dispensing glue with high viscosity and fast solidification, for example, the adhesive tape can be dispensed by using glue with viscosity of more than 50000 pascal seconds, so that the adhesive tape can be practically prevented from penetrating.

In addition, the adhesive tape 21 may also be a silica gel strip, and after the silica gel strip is inserted into the port 41 of the reserved gap 40, the silica gel strip has sufficient elasticity, so that the silica gel strip can be in close contact with the surface of the battery cell 30, thereby better preventing the structural adhesive layer 10 from infiltrating into the reserved gap 40.

Furthermore, the adhesive tape 21 may also be a hard adhesive tape, and after the hard adhesive tape is placed at the port 41 of the reserved gap 40, the hard adhesive tape can also prevent the structural adhesive layer 10 from seeping into the reserved gap 40, that is, a guarantee is also provided for the service life of the battery cell 30.

Of course, in order to ensure that the adhesive tape 21 can completely shield the port 41 of the reserved gap 40, as shown in fig. 5, the adhesive tape 21 may be set to be cylindrical, and the cross-sectional diameter of the adhesive tape 21 is greater than that of the reserved gap 40, so that a part of the adhesive tape 21 is embedded in the reserved gap 40, and the rest of the adhesive tape is disposed outside the reserved gap 40. In the extending direction of the vertical distance between the adjacent battery cells 30, the extending dimension of the reserved gap 40 is the width thereof, and the maximum dimension of the adhesive tape 21 is greater than the width of the reserved gap 40. Alternatively, the adhesive tape 21 partially extends into the reserved gap 40, or the adhesive tape 21 is located outside the reserved gap 40.

The adhesive tape 21 has flexibility to generate elastic deformation during the extrusion process to protect the battery cell 30.

A third embodiment of the battery module is shown in fig. 6 to 8, which is substantially the same as the first embodiment of the battery module, except that the filling member is an adhesive tape 22, and two opposite sides of the adhesive tape 22 are respectively adhered and fixed to the battery cells 30 at two sides of the reserved gap 40, so that the adhesive tape 22 covers the reserved gap 40.

At this time, the adhesive tape 22 extends from top to bottom along the port 41 of the reserved gap 40, the left side of the adhesive tape 22 is fixedly connected with the outer surface of the battery cell 30 arranged on the left side of the adhesive tape 22, and the right side of the adhesive tape 22 is fixedly connected with the outer surface of the battery cell 30 arranged on the right side of the adhesive tape 22, so that the port 41 of the reserved gap 40 is sealed, and the structural adhesive layer 10 is prevented from penetrating into the reserved gap 40.

For enhancing the bonding strength of the structural adhesive layer 10, the adhesive tape 22 may be a double-sided adhesive tape, and the double-sided adhesive tape is bonded and fixed to the structural adhesive layer 10, for example, the direction shown in fig. 8 is taken as an example, at this time, the upper surface and the lower surface of the double-sided adhesive tape both have viscosity, the upper surface of the double-sided adhesive tape is bonded and fixed to the lower surface of the battery cell 30, and the lower surface of the double-sided adhesive tape is bonded and fixed to the upper surface of the structural adhesive layer 10, so that the bonding strength of the.

A fourth embodiment of the battery module is shown in fig. 9 to 11, which is substantially the same as the first embodiment of the battery module, except that the filling member is a foam strip 23, the foam strip 23 extends along a port 41 of the reserved gap 40, the foam strip 23 can not only prevent the structural adhesive layer 10 from penetrating into the reserved gap 40, but also the foam strip 23 has a better vibration-proof effect, so as to provide better protection for the battery cell 30.

Of course, in order to ensure that the tampon 23 can completely block the port 41 of the reserved space 40, as shown in fig. 11, the tampon 23 may be configured to be cylindrical, and the section diameter of the tampon 23 is larger than the reserved space 40, so that a part of the tampon 23 is embedded in the reserved space 40, and the rest of the tampon is disposed outside the reserved space 40.

The tampon 23 may have a rectangular parallelepiped shape, and the tampon 23 is located outside the reserved space 40 and covers the port 41 of the reserved space 40.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A battery module, comprising,

the battery comprises a plurality of battery cores which are arranged side by side, wherein reserved gaps are arranged between every two adjacent battery cores;

the structural adhesive layer is connected with the side faces of the plurality of battery cells and shields the port of the reserved gap; and

and the filling piece is positioned between the structure adhesive layer and the battery core and plugged at the port of the reserved gap, and the filling piece is used for blocking the structure adhesive layer from permeating into the reserved gap.

2. The battery module according to claim 1, wherein the filler is an adhesive strip extending along the opening of the clearance.

3. The battery module according to claim 2, wherein the adhesive tape is an adhesive tape or a silicone tape or a hard adhesive tape.

4. The battery module according to claim 2, wherein the adhesive tape is a thixotrope having thixotropy.

5. The battery module according to claim 2, wherein the adhesive tape has flexibility to elastically deform during the extrusion process to protect the battery cell.

6. The battery module according to any one of claims 2 to 5, wherein the dimension in which the clearance extends in the extending direction of the vertical distance between the adjacent battery cells is the width thereof; the maximum size of the rubber strip is larger than the width of the reserved gap; or the adhesive tape part extends into the reserved gap; or the rubber strip is positioned outside the reserved gap.

7. The battery module according to claim 1, wherein the filling member is an adhesive tape, and two opposite sides of the adhesive tape are respectively adhered and fixed to the battery cells at two sides of the reserved gap, so that the adhesive tape covers the reserved gap.

8. The battery module according to claim 7, wherein the adhesive tape is a double-sided adhesive tape, and the double-sided adhesive tape is fixedly adhered to the structural adhesive layer; or, the filling piece is a foam strip which is arranged along the port of the reserved gap in an extending mode.

9. The battery module according to claim 8, wherein in an extending direction of the vertical distance between the adjacent battery cells, the extension dimension of the reserved gap is the width of the reserved gap, the tampon is cylindrical, and the cross-sectional diameter of the tampon is larger than the width of the reserved gap; or the foam cotton strip is cuboid and is positioned outside the reserved gap and shields the port of the reserved gap.

10. An automobile characterized by comprising the battery module according to any one of claims 1 to 9.