CN113383457A

CN113383457A - Battery structure

Info

Publication number: CN113383457A
Application number: CN202080006104.7A
Authority: CN
Inventors: 曾朝勇
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-09-10
Anticipated expiration: 2040-03-31
Also published as: WO2021196033A1; CN113383457B

Abstract

The utility model provides a battery structure, includes shell, electric core module, pyrocondensation membrane, first buffer layer, second buffer layer and glue film. The shell comprises an upper cover, a lower cover and a side plate for connecting the upper cover and the lower cover, the upper cover, the lower cover and the side plate are surrounded to form a containing cavity, and the lower cover is provided with a pressure relief groove communicated with the containing cavity. The battery cell module is accommodated in the accommodating cavity; the battery core module is coated by the thermal shrinkage film, and the thermal shrinkage film is provided with a first through hole corresponding to the pressure relief groove. The first buffer layer is located between the heat-shrinkable film and the lower cover, and is provided with a second through hole which is communicated with the first through hole and the pressure relief groove. The second buffer layer encircles the electricity core module is located the pyrocondensation membrane with between the curb plate. The glue layer is poured between the shell and the second buffer layer. The battery structure is beneficial to disassembly and exhaust, thereby being beneficial to prolonging the service life.

Description

Battery structure

Technical Field

The present application relates to a battery structure.

Background

The battery has the advantages of large specific energy, high working voltage, low self-discharge rate, small volume, light weight and the like, and is widely applied to daily life. And when encapsulating the electricity core module and forming the battery, carry out the encapsulating to the casing inside simultaneously, bond electricity core module and casing through the glue film and fix in order to fix the electricity core module. However, because of electric core is wrapped up by the glue film for can't in time get rid of when the gas is produced to electric core, thereby make the battery take place to warp easily, and glue film adhesion is on electric core module when dismantling the battery, damages electric core module easily when cleaing away the glue film.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a battery structure that facilitates extended service life.

A battery structure comprising:

the shell comprises an upper cover, a lower cover and a side plate for connecting the upper cover and the lower cover, the upper cover, the lower cover and the side plate are arranged in a surrounding manner to form an accommodating cavity, and the lower cover is provided with a pressure relief groove communicated with the accommodating cavity; the battery cell module is accommodated in the accommodating cavity;

the heat-shrinkable film wraps the battery cell module and is provided with a first through hole corresponding to the pressure relief groove; the first buffer layer is positioned between the heat-shrinkable film and the lower cover and is provided with a second through hole, and the second through hole is communicated with the first through hole and the pressure relief groove;

the second buffer layer surrounds the battery cell module and is positioned between the heat shrinkage film and the side plate; and the glue layer is poured between the shell and the second buffer layer.

As a scheme of this application, the battery structure still includes the third buffer layer, the third buffer layer be located the pyrocondensation membrane with electric core module orientation between the bottom of lower cover, just the third buffer layer corresponds first through-hole is equipped with the opening.

As a scheme of this application, the third buffer layer deviates from the surface of lower cover is equipped with the slot, the slot with the second through-hole intercommunication.

As a scheme of this application, the electric core module includes the electric core unit of the range upon range of setting of a plurality of, the range upon range of direction of electric core unit is on a parallel with the lower cover.

As a scheme of this application, the surface that the third buffer layer deviates from the lower cover is followed the range upon range of direction is equipped with the slot, the slot with the second through-hole intercommunication.

As a scheme of this application, the battery structure still includes the fourth buffer layer, the fourth buffer layer be located the pyrocondensation membrane with electric core module orientation between the lateral wall of curb plate.

As an aspect of the present application, the fourth buffer layer is further disposed between the adjacent cell units.

As an aspect of the present application, the fourth buffer layer is provided with an air vent groove in a direction perpendicular to the third buffer layer.

As one scheme of the present application, the first buffer layer and the second buffer layer are foam.

As an aspect of the present application, the groove penetrates through an outer circumference of the first buffer layer.

In the battery structure of this application, electric core module passes through the thermal shrinkage membrane cladding, avoids the encapsulating to form glue film during the glue film with electric core module contact to be favorable to disassembling of follow-up battery structure, reduce the damage to electric core module. Secondly, the gas of electricity core module output leads through the pyrocondensation membrane, and the first through-hole on the pyrocondensation membrane second through-hole and pressure release groove intercommunication on through first buffer layer to realized inside high-pressure gas's directional emission, avoided the battery structure to warp, thereby the battery structure of extension and the life of electricity core module.

Drawings

Fig. 1 is a schematic diagram of a battery structure according to an embodiment of the present application.

Fig. 2 is a disassembled schematic view of one mode of a battery structure according to an embodiment of the present application.

Fig. 3 is a disassembled schematic view of another mode of the battery structure according to the embodiment of the present application.

Fig. 4 is a top view of a battery structure according to an embodiment of the present application with an upper cover removed.

Fig. 5 is a partially disassembled schematic view of a battery structure according to an embodiment of the present application.

Fig. 6 is a partial schematic view of a battery structure according to an embodiment of the present application.

Description of the main elements

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application 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.

Referring to fig. 1 to 6, a battery structure 100 includes a housing 10, a cell module 20, a heat shrinkage film 30, a first buffer layer 40, a second buffer layer 50, and an adhesive layer 60. The battery cell module 20, the heat shrinkage film 30, the first buffer layer 40, the second buffer layer 50, and the adhesive layer 60 are contained in the housing 10.

Referring to fig. 1 and 2, the housing 10 includes an upper cover 11, a lower cover 13, and a side plate 15 connecting the upper cover 11 and the lower cover 13. The upper cover 11, the lower cover 13 and the side plate 15 enclose to form an accommodating cavity 16 (as shown in fig. 4). The lower cover 13 is provided with a pressure relief groove 130, and the pressure relief groove 130 is communicated with the accommodating cavity 16.

In the present embodiment, the upper cover 11 may be made of metal or high temperature resistant plastic. The lower cover 13 and the side plate 15 may be made of metal, such as aluminum alloy. In some embodiments, the lower cover 13 and the side plate 15 may also be made of a high temperature resistant plastic material.

Referring to fig. 3 and 4, the heat shrinkage film 30 covers the battery cell module 20, and the battery cell film group 20 covered by the heat shrinkage film 30 is accommodated in the accommodating cavity 16. The heat shrinkable film 30 is provided with a first through hole 31 corresponding to the pressure relief groove 130. Based on the property that the heat shrinkable film shrinks due to heat, the battery cell module 20 is tightly wrapped by the heat shrinkable film 20.

The first buffer layer 40 is located between the heat shrink film 30 and the lower cover 13. The first buffer layer 40 is provided with a second through hole 41, and the second through hole 41 communicates the first through hole 31 and the pressure relief groove 130.

In the present embodiment, the first buffer layer 40 may be, but is not limited to, foam.

The second buffer layer 50 is disposed around the battery cell module 20 and located between the heat shrinkage film 30 and the side plate 15.

In the present embodiment, the second buffer layer 50 may be, but is not limited to, foam. The second buffer layer 50 includes a first portion 51, a second portion 52, a third portion 53, and a fourth portion 54 that sequentially surround the periphery of the cell module 20. The first portion 51, the second portion 52, the third portion 53, and the fourth portion 54 are provided independently of each other. In some embodiments, the first portion 51, the second portion 52, the third portion 53 and the fourth portion 54 are integrally disposed, so that the second buffer layer 50 is disposed on the battery cell module 20.

The glue layer 60 is poured between the outer case 10 and the second buffer layer 50. The buffer layer 50 is pressed against the battery cell module 20 under the extrusion of the adhesive layer 60, so that the battery cell module 20 is fixed in the casing 10.

Referring to fig. 3, 5 and 6, the battery structure 100 may further include a third buffer layer 70. The third buffer layer 70 is located between the heat shrinkage film 30 and the bottom of the cell module 20 facing the lower cover 13. Wherein, the third buffer layer 70 is provided with an opening 71 corresponding to the first through hole 31. The opening 71 communicates between the cell module 20 and the first through hole 31.

In some embodiments, a surface of the third buffer layer 70 facing away from the lower cover 13 is provided with a groove 73, and the groove 73 is communicated with the second through hole 41. In the present embodiment, the groove 73 communicates with the second through hole 41 through the opening 71. In some embodiments, the grooves 73 extend to the outer periphery 701 of the third buffer layer 70 (i.e., through the outer periphery 701 of the third buffer layer 70) so as to communicate with the side walls 201 of the cell module 20, thereby facilitating air exhaust.

In some embodiments, the cell module 20 may include a plurality of cell units 21 stacked in a stacked manner, where a stacking direction of the plurality of cell units 21 is parallel to a surface of the lower cover 13 facing the cell units 21. At this time, the side wall of each cell unit 21 communicates with the groove 73, thereby facilitating air discharge. Preferably, the groove 73 is opened in the stacking direction and communicates with the opening 71.

The number of the grooves 73 may be one or more. When the number of the grooves 73 is plural, the arrangement direction of the plural grooves 73 may be different.

In some embodiments, referring to fig. 3, 4 and 5, the battery structure 100 may further include a fourth buffer layer 80. The fourth buffer layer 80 is located between the thermal shrinkage film 30 and the side wall 201 of the battery cell module 20 facing the side plate 15, and is disposed corresponding to the two opposite side walls 201 of the battery cell module 20. In some embodiments, the fourth buffer layer 80 may also be disposed around the cell module 20.

When the battery cell module 20 includes a plurality of battery cell units 21, the fourth buffer layer 80 may also be disposed between two adjacent battery cell units 21.

In some embodiments, referring to fig. 5, the surface of the fourth buffer layer 80 facing the cell module 20 or the cell unit 21 may further be provided with a vent groove 81 in a direction perpendicular to the third buffer layer 70. The exhaust grooves 81 can communicate with the grooves 73, which is more advantageous for exhausting the battery structure.

In some embodiments, referring to fig. 2, the battery structure 100 may further include a pressure relief valve 90, and the pressure relief valve 90 is installed in the pressure relief groove 130 to control the outward air release of the battery structure 100.

In some embodiments, referring to fig. 2, the battery structure 100 may further include a sealing ring 95, where the sealing ring 95 is disposed between the upper cover 11 and the side plate 15, so as to prevent gas in the battery structure 100 from being exhausted from a connection between the upper cover 11 and the side plate 15, and facilitate directional exhaust of gas inside the battery structure 100.

In the battery structure 100 of this application, electric core module 20 passes through the cladding of pyrocondensation membrane 30, avoids the encapsulating to form glue film 60 during glue film 60 with electric core module 20 contact to be favorable to disassembling of follow-up battery structure, reduce the damage to electric core module 20. Secondly, the gas of electric core module 20 output leads through pyrocondensation membrane 30, and the first through-hole on the pyrocondensation membrane 30 passes through second through-hole and pressure release groove intercommunication on the first buffer layer to realized inside high-pressure gas's directional emission, avoided the battery structure to warp, thereby the battery structure of extension and electric core module 20's life.

In addition, it is obvious to those skilled in the art that other various corresponding changes and modifications can be made according to the technical idea of the present application, and all such changes and modifications should fall within the protective scope of the present application.

Claims

1. A battery structure, comprising:

the shell comprises an upper cover, a lower cover and a side plate for connecting the upper cover and the lower cover, the upper cover, the lower cover and the side plate are arranged in a surrounding manner to form an accommodating cavity, and the lower cover is provided with a pressure relief groove communicated with the accommodating cavity;

the battery cell module is accommodated in the accommodating cavity;

the heat-shrinkable film wraps the battery cell module and is provided with a first through hole corresponding to the pressure relief groove;

the first buffer layer is positioned between the heat-shrinkable film and the lower cover and is provided with a second through hole, and the second through hole is communicated with the first through hole and the pressure relief groove;

the second buffer layer surrounds the battery cell module and is positioned between the heat shrinkage film and the side plate; and

and the glue layer is poured between the shell and the second buffer layer.

2. The battery structure of claim 1, further comprising a third buffer layer, wherein the third buffer layer is located between the heat shrink film and the bottom of the cell module facing the lower cover, and the third buffer layer is provided with an opening corresponding to the first through hole.

3. The cell structure of claim 2, wherein a surface of the third buffer layer facing away from the lower cover is provided with a groove, the groove communicating with the second through hole.

4. The battery structure of claim 2, wherein the cell module comprises a plurality of cell units stacked in a direction parallel to the lower cover.

5. The cell structure according to claim 4, wherein a surface of the third buffer layer facing away from the lower cover is provided with grooves in the stacking direction, the grooves communicating with the second through holes.

6. The battery structure of claim 2, further comprising a fourth buffer layer between the heat shrink film and a side wall of the cell module facing the side plate.

7. The battery structure of claim 6, wherein the fourth buffer layer is further disposed between adjacent cell units.

8. The battery structure according to claim 6 or 7, wherein the fourth buffer layer is provided with vent grooves in a direction perpendicular to the third buffer layer.

9. The battery structure of claim 1, wherein the first buffer layer and the second buffer layer are foam.

10. The cell structure of claim 3 or 5, wherein the groove extends through an outer periphery of the first buffer layer.