CN218569169U

CN218569169U - Battery module

Info

Publication number: CN218569169U
Application number: CN202222656855.2U
Authority: CN
Inventors: 何杰锋; 郑琳
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-03-03
Anticipated expiration: 2032-10-10

Abstract

The utility model provides a battery module sets up insulating enhancement cover between module end plate and tip electricity core, and insulating enhancement cover is close to one side outer fringe of electricity core subassembly and is provided with flange structure, flange structure holds the chamber around forming, the outline of tip electricity core is located along module length direction's orthographic projection hold the intracavity to make the outside of tip electricity core big face surround by insulating enhancement cover completely, ensured the insulating protection nature of battery module promptly on the one hand, the outside big face of on the other hand tip electricity core is whole and the medial surface butt of insulating enhancement cover, forms effective support to the tip electricity core big face of inflation at battery charge-discharge in-process, and the effectual outside big face of the tip electricity core that has prevented current battery module is because of the end plate support defect, and crease, deformation and local lithium phenomenon of analyzing that produce have improved the security.

Description

Battery module

Technical Field

The utility model relates to a power battery technical field especially relates to a battery module.

Background

Current battery module is fixed in the battery package for satisfying the battery module, needs to exceed electric core bottom 10 to 30mm with the end plate bottom about, leads to the tip electricity core in the battery module to have partial electric core to expose outside the end plate greatly from this. These large faces that expose can constantly expand at battery charge-discharge in-process to form the crease with end plate bottom handing-over department, produce the deformation, cause tip electricity core local lithium of separating, reduce electric core life, thereby reduced the life of whole module. Secondly, the process is joined in marriage at battery module and battery packing to these big faces that expose, and even in the follow-up electric automobile use, the edge of the big face in outside and the tip electricity core of tip electricity core owing to lack effectual protection, causes insulating inefficacy very easily to influence battery module and the electric automobile who loads this battery module and produce the electrical safety risk.

Therefore, a new technical solution is needed.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a battery module to overcome the above problems or at least partially solve the above problems, and specifically:

a battery module comprises a battery module body and a module outer frame, wherein a containing space is arranged in the module outer frame, and the battery module body is arranged in the containing space; the battery cell assembly comprises more than two battery cells stacked along the length direction of the module, and the battery cell assembly comprises end battery cells positioned on two sides of the module; the module outer frame comprises module end plates positioned at two ends of the module in the length direction; the battery module further comprises an insulation reinforcing cover, and the insulation reinforcing cover is arranged between the module end plate and the end part battery core; the insulating cover of strengthening is provided with flange structure near the one side outer fringe of battery core subassembly, flange structure holds the chamber around forming, the outer profile of tip battery core is located along module length direction's orthographic projection hold the intracavity.

Further, the outer surface of the end cell comprises a cell large surface; the insulation reinforcing cover comprises a bottom surface, and the flanging structure is connected with the bottom surface; the bottom surface is abutted against the large surface of the battery cell outside the end portion battery cell.

Furthermore, the outer surface of the end part battery cell also comprises a cover plate top surface, a bottom surface and two side surfaces of the battery cell;

the flanging structure comprises an upper flanging, a lower flanging and two side flanging, wherein the upper flanging, the lower flanging and the two side flanging are respectively at least partially and correspondingly abutted against the top surface, the bottom surface and the two side surfaces of the cover plate of the end battery cell.

Furthermore, the height of the insulating reinforcing cover lower flanging protruding out of the bottom surface of the insulating reinforcing cover is smaller than the thickness of the end cell.

Further, the flanging structure comprises an upper flanging, a lower flanging and two side flanging, and the upper flanging, the lower flanging and the two side flanging are respectively and correspondingly abutted against the top surface, the bottom surface and the two side surfaces of the cover plate of the end battery core.

Furthermore, the height of the accommodating cavity is 0.5-3mm longer than the height of the battery core, and the width of the accommodating cavity is 0.5-3mm longer than the width of the battery core.

Further, the height of the accommodating cavity is 1.5mm longer than the height of the battery cell, and the width of the accommodating cavity is 1.5mm longer than the width of the battery cell.

Furthermore, the height of the upper flanging of the insulating reinforcing cover protruding out of the bottom surface of the insulating reinforcing cover is smaller than the minimum distance between the outer large surface of the end battery cell and the terminal post of the end battery cell.

Furthermore, the insulation reinforcing cover is fixedly connected with the end electric core through a structural adhesive or a double-faced adhesive tape.

Furthermore, the module frame still includes module bottom plate and module apron, the module bottom plate the module apron with the module end plate encloses to establish and forms the module frame.

Further, the insulation reinforcing cover comprises a carbon steel base material and an insulation layer, and the insulation layer is applied to the surface of the carbon steel base material in a plastic spraying mode.

The utility model provides a beneficial effect that battery module has is: the utility model discloses the utilization is in the module end plate with set up insulating enhancement cover between the tip electricity core, insulating enhancement cover is provided with flange structure near one side outer fringe of electricity core subassembly, flange structure holds the chamber around forming, the outline of tip electricity core is located along module length direction's orthographic projection hold the intracavity to make the big face in the outside of tip electricity core surround by insulating enhancement cover completely, ensured the insulating protection nature of battery module promptly on the one hand, the big face in the outside of on the other hand tip electricity core is whole and the medial surface butt of insulating enhancement cover, forms effective support to the big face of expanded tip electricity core at battery charge-discharge in-process, and the effectual big face in the outside of the tip electricity core that has prevented current battery module supports the defect because of the end plate, and the crease that produces, warp and local lithium of analyzing, has improved the life of electricity core and whole module.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural view illustrating an exploded state of a battery module;

fig. 2 is a schematic structural diagram of an explosion state of the insulation-reinforcing cover and the end cell of the battery module;

FIG. 3 is a schematic view of an embodiment of the insulation-reinforcing cover;

fig. 4 is a three-dimensional view of the insulation reinforcing cage.

Detailed Description

Reference now will be made in detail to embodiments of the present application, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the application, not limitation of the application. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present application cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. As used in this specification, the terms "first," "second," and the like may be used interchangeably to distinguish one element from another and are not intended to indicate the position or importance of each element. As used in the specification, the terms "a," "an," "the," and "said" are intended to mean that there are one or more of the elements, unless the context clearly indicates otherwise. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements other than the listed elements. Wherein like numerals indicate like elements throughout, the invention is further explained below in conjunction with specific embodiments.

Referring to fig. 1 to 4, fig. 1 is a schematic structural view illustrating an exploded state of a battery module; fig. 2 is a schematic structural diagram of an explosion state of the insulation-reinforcing cover and the end cell of the battery module; FIG. 3 is a schematic view of an embodiment of the insulation-reinforcing cover; fig. 4 is a three-dimensional view of the insulation reinforcing cage.

As shown in fig. 1 to 4, the present embodiment provides a battery module, which includes an electric core assembly 1 and a module outer frame, wherein an accommodating space is arranged in the module outer frame, and the electric core assembly 1 is arranged in the accommodating space; the battery cell assembly 1 comprises more than two battery cells 11 which are stacked along the length direction of the module, and the battery cell assembly 1 comprises end battery cells 12 which are positioned at two sides of the module; the module outer frame comprises module end plates 2 positioned at two ends of the module in the length direction; the battery module further comprises an insulation reinforcing cover 3, and the insulation reinforcing cover 3 is arranged between the module end plate 2 and the end cell 12; insulating one side outer fringe of strengthening cover 3 and being close to electric core subassembly 1 is provided with flange structure 4, flange structure 4 holds the chamber around forming, the outer profile of tip electricity core 12 is located along module length direction's orthographic projection hold the intracavity.

In detail, the outer surface of the end cell 12 includes a cell large face 74; the insulation reinforcing cover 3 comprises an insulation reinforcing cover bottom surface 44, and the flanging structure 4 is connected with the insulation reinforcing cover bottom surface 44; the insulating reinforcement cover bottom surface 44 abuts against the cell large surface 74 on the outer side of the end cell 12. In one possible embodiment, the end cell 12 is a hard shell, preferably a square shell cell.

In detail, the insulation reinforcing cover comprises a carbon steel base material and an insulation layer, and the insulation layer is applied to the surface of the carbon steel base material in a plastic spraying mode. The carbon steel substrate has sufficient rigidity to can effectual support and restraint the big face 74 of electric core of battery module tip electricity core, thereby can more effectual prevention current battery module's the big face in outside of tip electricity core support the defect because of the end plate, and crease, deformation and the local lithium phenomenon of analyzing that produces have improved the security. In addition, an insulating layer is arranged on the surface of the carbon steel substrate in a plastic spraying mode, and the insulating layer comprises at least one of polypropylene, polycarbonate, polyimide, polyethylene terephthalate, polyethylene, ABS plastic and glass fiber reinforced plastic.

In detail, the outer surface of the end portion cell 12 further includes a cover top surface 71, a bottom surface 73 and two side surfaces 72 of the cell; the flanging structure 44 includes an upper flange 41, a lower flange 42 and two side flanges 43, where the upper flange 41, the lower flange 43 and the two side flanges 42 respectively at least partially and correspondingly abut against the top surface 71, the bottom surface 73 and the two side surfaces 72 of the cover plate of the end electric core 12.

In detail, the height of the downward flanging of the insulation reinforcing cover 3 protruding from the bottom surface 44 of the insulation reinforcing cover is less than the thickness of the end cell 12.

In detail, the flange structure 4 of the insulation reinforcing cover 3 includes an upper flange 41, a lower flange 43, and two side flanges 42, where the upper flange 41, the lower flange 43, and the two side flanges 42 respectively and correspondingly abut against the top surface 71, the bottom surface 73, and the two side surfaces 72 of the cover plate of the end electric core 12.

Referring to fig. 4, the height H of the accommodating cavity is 0.5 to 3mm longer than the height of the end cell 12, and the width L of the accommodating cavity is 0.5 to 3mm longer than the width of the end cell 12.

In a preferred embodiment, the height H of the receiving space is 1.5mm longer than the height of the end cell 12, and the width L of the receiving space is 1.5mm longer than the width of the end cell 12.

In detail, the height T of the upturned edge 41 of the insulation reinforcing cover 3 protruding from the bottom surface 44 of the insulation reinforcing cover is smaller than the minimum distance between the outer large surface 74 of the end cell 12 and the pole 75 of the end cell 12, and is 0-10mm.

In detail, the insulating reinforcing cover 3 is fixedly connected with the end portion electric core through a structural adhesive or a double-sided adhesive.

In detail, the module outer frame further comprises a module bottom plate 6 and a module cover plate 5, wherein the module bottom plate 6, the module cover plate 5 and the module end plate 2 are enclosed to form the module outer frame.

In detail, the height W of the downward turned-up edge 43 is greater than 0mm and smaller than the thickness of the end electric core 12. In a preferred embodiment, the wall thickness of the material for producing the insulation-reinforcing cover is between 0.5 and 2 mm.

The utility model provides a battery module's beneficial effect is:

the utility model discloses the utilization is in the module end plate with set up insulating enhancement cover between the tip electricity core, insulating enhancement cover is provided with flange structure near one side outer fringe of electricity core subassembly, flange structure holds the chamber around forming, the outline of tip electricity core is located along module length direction's orthographic projection hold the intracavity to make the big face in the outside of tip electricity core surround by insulating enhancement cover completely, ensured the insulating protection nature of battery module promptly on the one hand, the big face in the outside of on the other hand tip electricity core is whole and the medial surface butt of insulating enhancement cover, forms effective support to the big face of expanded tip electricity core at battery charge-discharge in-process, and the effectual big face in the outside of the tip electricity core that has prevented current battery module supports the defect because of the end plate, and the crease that produces, warp and local lithium of analyzing, has improved the life of electricity core and whole module.

The above is the preferred embodiment of the present invention, to the technical personnel in the field, based on the technical scheme and the utility model essence of the present invention, can also make other deformations and improvements, but these are based on the deformation and the improvement of the present invention, should all be covered in the protection scope of the present invention. This written description uses examples to disclose the application, including the best mode, and also to enable any person skilled in the art to practice the application, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the application is defined by the claims, and may include other embodiments that occur to those skilled in the art. Such other embodiments are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.

Claims

1. The utility model provides a battery module, includes core subassembly and module frame, its characterized in that:

an accommodating space is arranged in the module outer frame, and an electric core assembly is arranged in the accommodating space;

the battery cell assembly comprises more than two battery cells which are stacked along the length direction of the module, and the battery cell assembly comprises end battery cells positioned on two sides of the module;

the module outer frame comprises module end plates positioned at two ends of the module in the length direction;

the battery module further comprises an insulation reinforcing cover, and the insulation reinforcing cover is arranged between the module end plate and the end part battery core;

the insulating cover of strengthening is provided with flange structure near the one side outer fringe of battery core subassembly, flange structure holds the chamber around forming, the outer profile of tip battery core is located along module length direction's orthographic projection hold the intracavity.

2. The battery module according to claim 1, wherein: the outer surface of the end cell comprises a cell large surface; the insulation reinforcing cover comprises an insulation reinforcing cover bottom surface, and the flanging structure is connected with the insulation reinforcing cover bottom surface; the bottom surface of the insulating reinforcing cover is abutted to the large surface of the battery cell outside the end portion battery cell.

3. The battery module according to claim 2, wherein: the outer surface of the end part battery cell also comprises a cover plate top surface, a bottom surface and two side surfaces of the battery cell;

4. The battery module according to claim 3, wherein: the height of the lower flanging of the insulation reinforcing cover protruding out of the bottom surface of the insulation reinforcing cover is smaller than the thickness of the end part battery cell.

5. The battery module according to claim 3 or 4, wherein:

the flanging structure comprises an upper flanging, a lower flanging and two side flanging, and the upper flanging, the lower flanging and the two side flanging are respectively and correspondingly abutted against the top surface, the bottom surface and the two side surfaces of the cover plate of the end part battery cell.

6. The battery module according to claim 1, wherein: the height of the accommodating cavity is 0.5-3mm longer than that of the end battery cell, and the width of the accommodating cavity is 0.5-3mm longer than that of the end battery cell.

7. The battery module according to claim 6, wherein: the height of the accommodating cavity is 1.5mm longer than that of the end battery cell, and the width of the accommodating cavity is 1.5mm longer than that of the end battery cell.

8. The battery module according to claim 3, wherein:

the height of the upper flanging of the insulating reinforcing cover protruding out of the bottom surface of the insulating reinforcing cover is smaller than the minimum distance between the outer large surface of the end battery cell and the pole of the end battery cell.

9. The battery module according to claim 1, wherein: the insulation reinforcing cover is fixedly connected with the end part electric core through a structural adhesive or a double-faced adhesive tape.

10. The battery module of any of claims 1-4,6-9 wherein: the insulation reinforcing cover comprises a carbon steel base material and an insulation layer, and the insulation layer is applied to the surface of the carbon steel base material in a plastic spraying mode.