CN211828920U

CN211828920U - Novel soft package lithium ion power battery module structure

Info

Publication number: CN211828920U
Application number: CN202020515665.7U
Authority: CN
Inventors: 黄卫峰; 李永江; 帅建华
Original assignee: Lishen Power Battery System Co Ltd
Current assignee: Lishen Qingdao New Energy Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-10-30
Anticipated expiration: 2030-04-10

Abstract

The utility model discloses a novel soft package lithium ion power battery module structure, which comprises a battery module main body; the battery module main body comprises a plurality of soft-package battery cell bodies (1); the top of the battery module main body is provided with a protection plate (5); the battery module main body is positioned in the lower aluminum plate (3) with the upward opening; the left side and the right side of the lower aluminum plate (3) are respectively and fixedly connected with an end plate (4); the heat-conducting glue is filled between the soft-packaged cell body and the lower aluminum plate. A plurality of longitudinally distributed buffering pieces are arranged at the top of the lower aluminum plate at equal intervals and used for reserving the space for the expansion of the battery core; both ends bottom surface about guard plate (5) all fixes through laser welding with end plate (4) and lower aluminum plate (3) top, promotes module bulk strength. The utility model discloses a novel soft packet of lithium ion power battery module structure, through aluminum plate's design down and reserve the expanded bolster of electric core and realize flexible in groups, improved the efficiency in groups of module, reduced the module cost.

Description

Novel soft package lithium ion power battery module structure

Technical Field

The utility model relates to a new energy automobile battery module technical field especially relates to a novel soft packet of lithium ion power battery module structure.

Background

Compared with a square-shell battery, the soft-package battery has the remarkable characteristic that the shell structure of the soft-package battery is a soft packaging material (generally referred to as an aluminum plastic film).

The conventional soft package module grouping structure mainly refers to a standard module design performed by VDA (german automobile association standard) size. Although the VDA standard module has a universal and standardized feature, the VDA standard module cannot fully utilize the space of the battery pack due to the fixed module structure, and cannot improve the energy density of the battery pack. Wherein, the rising of the whole cost is brought to the smaller module structure, and the design concept of the current low cost is not met. The large special-shaped module based on the size design of the battery pack does not have the design concept of universality and low cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel soft packet of lithium ion power battery module structure to the technical defect that prior art exists.

Therefore, the utility model provides a novel soft package lithium ion power battery module structure, which comprises a battery module main body;

the battery module main body comprises a plurality of vertically arranged and transversely arranged soft package battery cell bodies;

the top of the battery module main body is provided with horizontally distributed protection plates;

the battery module main body is positioned in the lower aluminum plate with the upward opening;

the left side and the right side of the lower aluminum plate are respectively and fixedly connected with an end plate;

heat-conducting glue is filled between the soft-packaged cell body and the lower aluminum plate;

the both ends bottom surface about the guard plate all fixes through laser welding with end plate and lower aluminum plate top.

Wherein, the front and back both ends of guard plate to and the front and back both ends of lower aluminum plate have welded a transversely distributed limit beam respectively.

Wherein, the front and back both ends of battery module main part are provided with a plurality of plastics frame respectively.

Wherein, every soft-packaged electrical core body bottom, and down between the aluminum plate top surface, it has the heat conduction to glue to fill.

Wherein, the guard plate and the outside of lower aluminum plate are fixed through many packing area of encircleing the distribution.

Wherein, still be provided with an insulating heat conduction pad between the top of battery module main part and the guard plate.

By above the utility model provides a technical scheme is visible, compares with prior art, the utility model provides a novel soft packet of lithium ion power battery module structure, its structural design science compares traditional VDA module, has reduced the use of spare part, and the bolster through aluminum plate's design and reservation electric core inflation down realizes flexibility in groups, through flexible design, has improved the efficiency in groups of module, has reduced the module cost, has improved the energy density and the production efficiency of battery package, has the production practice meaning of great importance.

Drawings

Fig. 1 is a schematic view of the overall structure of a novel soft-package lithium ion power battery module structure provided by the present invention;

fig. 2 is a schematic view of an exploded structure of a novel soft-package lithium ion power battery module structure provided by the present invention;

in the figure: 1 is a soft-package battery cell body, 2 is a plastic frame, and 3 is a lower aluminum plate;

4 is the end plate, 5 is the guard plate, 6 is the bolster, 7 is insulating heat conduction pad, 8 is the boundary beam.

Detailed Description

In order to make the technical means of the present invention easier to understand, the present application will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In addition, it should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the term "mounted" and the like should be interpreted broadly, and may be, for example, either fixedly mounted or detachably mounted.

The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

Referring to fig. 1 and 2, the utility model provides a novel soft-package lithium ion power battery module structure, which comprises a battery module main body;

the battery module main body comprises a plurality of vertically arranged and transversely arranged soft package battery cell bodies 1;

the top of the battery module main body is provided with horizontally distributed protection plates 5;

the battery module main body is positioned in the lower aluminum plate 3 with the upward opening;

the left side and the right side of the lower aluminum plate 3 are respectively and fixedly connected with an end plate 4;

a plurality of longitudinally distributed buffering parts 6 are arranged (for example, adhered) at equal intervals on the top of the lower aluminum plate 3 and are used for reserving the space for cell expansion;

the buffer piece 6 is arranged corresponding to a gap between any two adjacent soft-package battery cell bodies 1 (below the gap);

the bottom surfaces of the left end and the right end of the protection plate 5 are fixed with the top of the end plate 4 and the top of the lower aluminum plate 3 through laser welding.

It should be noted that the buffer member 6 may be made of an existing material with good thermal conductivity and elasticity, for example, an organic silicon heat conducting sheet may be used, and has the advantages of high thermal conductivity, low thermal resistance, good resilience, and good insulating property. The organic silicon heat conducting fin is an organic silicon elastomer, and ceramic heat conducting powder is added in the organic silicon heat conducting fin. Is a mature technology in the prior art and is not described in detail herein.

The utility model discloses in, on specifically realizing, both ends around guard plate 5 to and both ends around lower aluminum plate 3 have welded a transversely distributed's limit roof beam 8 respectively. Therefore, the firm reliability of the entire structure can be enhanced.

In the utility model, in the concrete implementation, a plurality of plastic frames 2 are respectively arranged at the front end and the rear end of the main body of the battery module;

a plurality of plastic frames located on the same side are connected (e.g., clamped or integrally formed) with each other and fixedly connected with the end plate 4; and the plastic frame 2 is used for fixing the lug of the soft-package battery cell body 1.

It should be noted that, in general, the tabs of the four soft-package battery cell bodies 1 are fixed by one plastic frame, and of course, the size of the plastic frame can be adjusted according to the needs of a user to fix the tabs of any plurality of soft-package battery cell bodies 1.

The utility model discloses in, on specifically realizing, every soft-packaged electrical core body 1 bottom, and between the 3 top surfaces of lower aluminum plate, it has the heat conduction to glue to fill, consequently, the utility model discloses a battery module is glued through the heat conduction and is come out the heat transfer, is favorable to strengthening soft-packaged electrical core body 1 and lower aluminum plate 3's heat transfer effect, realizes better radiating effect.

In the present invention, in particular, an insulating heat conducting pad 7 (which may be a rectangular structure) may be disposed between the top of the battery module main body and the protection plate 5; a guard plate for playing heat conduction effect, help battery module heat dissipation insulates laminate polymer battery core body 1 simultaneously, prevents that electric core and aluminium system from taking place to electrically conduct.

It should be noted that the insulating thermal pad 7 is an organic silicon thermal pad, and has the advantages of high thermal conductivity, low thermal resistance, good resilience, and good insulating property. The organic silicon heat conducting pad is an organic silicon elastomer, and ceramic heat conducting powder is added in the organic silicon heat conducting pad. Is a mature technology in the prior art and is not described in detail herein.

The utility model discloses in, on specifically realizing, for preventing that electric core is inefficacy in the vibration of vertical direction, on the upper portion of battery module main part, guard plate 5 is connected (for example joint or threaded connection or welding) rather than the end plate 4 of the left and right sides mutually supporting for protect soft-packaged electric core body 1.

The utility model discloses in, on specifically realizing, the battery module is whole to be fixed through packing area, and novel soft packet of lithium ion power battery module structure's guard plate 5 and lower aluminum plate 3 outside are fixed through many packing areas around distributing promptly.

The utility model discloses in, on specifically realizing, the utility model discloses a battery module structure, aluminum plate 3's design and the bolster 6 of reserving electric core inflation space under the accessible realize flexible in groups, have greatly improved the design flexibility.

To sum up, compare with prior art, the utility model provides a pair of novel soft packet of lithium ion power battery module structure, its structural design science compares traditional VDA module, has reduced the use of spare part, and the design through lower aluminum plate and reserve the expanded bolster of electric core and realize flexibility in groups, through flexible design, has improved the efficiency in groups of module, has reduced the module cost, has improved the energy density and the production efficiency of battery package, has the production practice meaning of great weight.

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

Claims

1. A novel soft package lithium ion power battery module structure is characterized by comprising a battery module main body;

the battery module main body comprises a plurality of vertically arranged and transversely arranged soft package battery cell bodies (1);

the top of the battery module main body is provided with horizontally distributed protection plates (5);

the battery module main body is positioned in the lower aluminum plate (3) with the upward opening;

the left side and the right side of the lower aluminum plate (3) are respectively and fixedly connected with an end plate (4);

heat-conducting glue is filled between the soft-package battery cell body (1) and the lower aluminum plate (3);

a plurality of longitudinally distributed buffer pieces (6) are arranged at the top of the lower aluminum plate (3) at equal intervals and used for reserving the space for battery core expansion;

the buffer piece (6) is arranged corresponding to a gap between any two adjacent soft-package battery cell bodies (1);

the bottom surfaces of the left end and the right end of the protection plate (5) are fixed with the top of the end plate (4) and the top of the lower aluminum plate (3) through laser welding.

2. The novel soft-package lithium-ion power battery module structure as claimed in claim 1, wherein a transversely-distributed side beam (8) is welded to each of the front and rear ends of the protection plate (5) and the front and rear ends of the lower aluminum plate (3).

3. The novel soft package lithium ion power battery module structure as claimed in claim 1, wherein a plurality of plastic frames (2) are respectively arranged at the front and back ends of the battery module body.

4. The novel soft-package lithium-ion power battery module structure according to claim 1, wherein a heat conducting glue is filled between the bottom of each soft-package battery cell body (1) and the top surface of the lower aluminum plate (3).

5. The novel soft package lithium ion power battery module structure as claimed in claim 1, wherein the protection plate (5) and the outer part of the lower aluminum plate (3) are fixed by a plurality of packing belts distributed around.

6. The novel soft-package lithium-ion power battery module structure as claimed in any one of claims 1 to 5, wherein an insulating heat-conducting pad (7) is further arranged between the top of the battery module main body and the protection plate (5).