CN217641706U

CN217641706U - Lower plastic structure, top cap subassembly and power battery

Info

Publication number: CN217641706U
Application number: CN202220975058.8U
Authority: CN
Inventors: 刘峰; 奚明明; 兑瀚
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-10-21
Anticipated expiration: 2032-04-25

Abstract

The utility model provides a lower plastic structure, top cap subassembly and power battery, body including integrative structure, be equipped with utmost point post through-hole and notes liquid hole through-hole on the body, the body middle part is equipped with the arch, protruding bilateral symmetry installation insulating piece, insulating piece are used for covering utmost point ear whole area; a plurality of joint spare of body both sides equipartition, joint spare is used for joint insulating piece. Lower plastic structure, top cap subassembly and power battery, during the battery assembly, during the core package upset 90 degrees, can play the supporting role to core package utmost point ear, reduced the risk of inserting that falls of core package when rolling over utmost point ear, greatly reduced the short circuit risk of battery.

Description

Lower plastic structure, top cap subassembly and power battery

Technical Field

The utility model belongs to the technical field of lower plastic structure, especially, relate to a lower plastic structure.

Background

At present, lower plastic structure generally includes structures such as top cap, aluminum hull, core package, and the core package is when assembling with the top cap, because the core package needs the 90 degrees of upset, this process of utmost point ear is rolled over in the core package existence, when utmost point ear overlength or the angle of rolling over utmost point ear not to the time, inside the easy back-insert core package of utmost point ear after going into the shell to cause the battery short circuit. At present, in the design process of a battery structure, the thickness of plastic is usually increased to increase the bending space of the tab, but when the thickness of the plastic is increased, the energy density of the battery is reduced.

Disclosure of Invention

In view of this, the present invention is directed to a lower plastic structure to solve the problem of too high short-circuit rate of the battery.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a lower plastic structure comprises a body of an integrated structure, wherein a pole through hole and a liquid injection hole through hole are formed in the body, a bulge is formed in the middle of the body, insulating sheets are symmetrically arranged on two sides of the bulge, and the insulating sheets are used for covering the whole area of a pole lug; a plurality of joint spare of body both sides equipartition, joint spare is used for joint insulating piece.

Furthermore, a positioning piece is arranged between the pole through hole and the protrusion, the positioning piece is of a U-shaped strip structure, and a U-shaped structure is formed after the positioning piece is installed on the body.

Furthermore, bosses are arranged at two ends of the body and are of hollow boss structures, and a plurality of welding spots are arranged on the bosses.

Furthermore, the clamping pieces are of L-shaped structures, and clamping interfaces of each pair of clamping pieces are arranged oppositely.

Furthermore, the insulating sheet is made of PP or PET, and the body is made of PP or PPS.

Further, the thickness of the insulation sheet ranges from 0.2 mm to 0.5mm.

Furthermore, the insulating piece is a rectangular plate, and a notch is arranged at each right angle.

Furthermore, annotate the liquid hole through-hole and be located between arch and the setting element, annotate liquid hole through-hole top and be equipped with additional strengthening.

Compared with the prior art, lower plastic structure have following advantage:

(1) The lower plastic structure of the utility model is provided with a plurality of clamping pieces which are assembled with the insulating sheets and used for separating the battery core cladding main body and the core cladding lug; during battery assembly, when the core package overturns 90 degrees, the core package lug can be supported, the inverted insertion risk of the core package when the lug is folded is reduced, and the short circuit risk of the battery is greatly reduced.

Another object of the present invention is to provide a cap assembly to solve the problem of too high battery short-circuit rate.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a top cover assembly comprises the lower plastic structure.

The advantages of the top cover assembly and the lower plastic structure are the same as those of the prior art, and are not described herein again.

Another object of the present invention is to provide a power battery to solve the problem of too high short circuit rate of the battery.

a power battery comprises the lower plastic structure or the top cover assembly.

The power battery and the lower plastic structure have the same advantages compared with the prior art, and are not described in detail herein.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a first schematic view of a lower plastic structure according to an embodiment of the present invention;

fig. 2 is a second schematic view of a lower plastic structure according to an embodiment of the present invention;

fig. 3 is a schematic view of an insulation sheet according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a power battery according to an embodiment of the present invention.

Description of reference numerals:

1-body; 2-a positioning element; 3, reinforcing ribs; 4-pole through hole; 5-boss; 6-a clamping piece; 7-bulge; 8-insulating sheets; 81-notch; 9-a top cover sheet; 10-core cladding; 11-a core pack body; 12-a tab; 13-Top cover.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A lower plastic structure is shown in figures 1 to 3 and comprises a body 1, a positioning part 2, reinforcing ribs 3, a boss 5 and a protrusion 7 which are of an integral structure, wherein the body 1 is a rectangular plate, the protrusion 7 is arranged in the middle of the body 1, the positioning part 2, a pole through hole 4 and the boss 5 are respectively and symmetrically arranged from two sides of the protrusion 7 to the end part of the body 1 in sequence, a liquid injection hole through hole is arranged on the body 1 and is positioned between the protrusion 7 and the positioning part 2, and the reinforcing ribs 3 are fixedly arranged above the liquid injection hole through hole; insulating sheets 8 are symmetrically arranged on two sides of the bulge 7, and the insulating sheets 8 cover the whole area of the core bag lug; a plurality of joint spare 6 of body 1 both sides equipartition, joint spare 6 is used for joint insulating piece 8. The lower plastic structure is made of PP or PPS.

The positioning piece 2 is of a U-shaped strip structure, is arranged on the body 1 to form a horseshoe-shaped structure and is used for positioning the positive and negative electrode connecting pieces.

The strengthening rib 3 is located annotates liquid hole through-hole top, prevents to annotate liquid hole glue nail and falls into inside the battery, influences battery safety.

The two pole through holes 4 are respectively a positive pole through hole and a negative pole through hole. The boss 5 is a hollow boss structure, and is provided with a plurality of holes on the boss for connecting the core package body and the lower plastic structure, and simultaneously for spacing the core package body and the top cover plate in the height direction of the electric core.

As shown in fig. 1 and 2, the clamping members 6 are L-shaped, and the clamping interfaces of each pair of clamping members 6 are arranged oppositely; in one embodiment, the clamping interfaces of the clamping pieces 6 are transversely arranged oppositely; in another embodiment, the clip interfaces of the clip members 6 are longitudinally opposed.

The insulating sheet 8 is used for separating the core package body and the core package electrode lug in the height direction, and the insulating sheet 8 covers the whole area of the core package electrode lug. The thickness of the insulating sheet 8 is 0.2-0.5mm. The insulating sheet 8 is made of PP or PET. Insulating piece 8 is the rectangular plate, and every right angle department is equipped with a breach 81.

As shown in fig. 4, a power battery includes a lower plastic structure and a top cover 9, wherein the bottom of the lower plastic structure is fixedly mounted with the top cover 9 to form a top cover 13, and two sides of the top cover 13 are respectively mounted with a core package 10.

The core package 10 includes a core package body 11 and a tab 12 disposed at one side thereof.

As shown in fig. 2 and 4, in one embodiment, the lower plastic structure is installed above the top cover sheet 9, the core package 10 is installed on two sides, and the core package 10 and the top cover sheet 9 are not in contact with each other, so that the lower plastic structure functions to space the core package 10 from the top cover sheet 9; the core cladding lug 12 is welded at the position above the pole through hole 4, and the insulating sheet 8 is arranged above the core cladding lug 12; the lower plastic structure is provided with a plurality of clamping pieces 6, the corners of the insulating sheet 8 are provided with gaps 81, and after the gaps 81 are clamped by the clamping pieces 6, the insulating sheet 8 covers the whole area of the core bag lug 12; the battery has the action of 90 degrees of upset in core package 10 in assembling process, core package 10 has the action of 12 utmost points ear of buckling this moment, perhaps buckle utmost point ear 12 angle when utmost point ear 12 overlength not to the correct time, utmost point ear 12 is easy to fall insert inside core package body 11 after going into the shell, thereby cause the battery short circuit, insulating piece 8 is installed between core package utmost point ear 12 and core package body 11, when core package body 11 overturns 90 degrees, insulating piece 8 has the supporting role to core package utmost point ear 12, thereby the risk of falling to insert of battery utmost point ear 12 has been reduced, the short circuit risk of battery has been reduced.

As shown in fig. 1 and 4, in another embodiment, the protrusion 7 and the insulation sheet 8 are integrated together, the insulation sheet 8 is perpendicular to the body 1, the insulation sheet 8 is located on two sides of the protrusion 7, and a pair of clamping members 6 are respectively located on the left side and the right side of the protrusion 7. During concrete implementation, when the core package lug 12 and the top cover 13 are assembled (welding is completed), a worker bends the insulating sheet 8, so that the notch 81 of the insulating sheet 8 is clamped with the clamping piece 6, the core package body 11 and the core package lug 12 are separated in the height direction, and meanwhile, the insulating sheet 8 plays a role in supporting the core package lug 12, so that the inverted insertion risk of the battery lug 12 is reduced, and the short circuit risk of a battery is reduced; wherein, the root of the lower insulation sheet 8 is provided with nicks which are convenient for bending.

A top cover assembly comprises the lower plastic structure.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lower plastic structure, includes the body of a body structure, be equipped with utmost point post through-hole on the body and annotate liquid hole through-hole, its characterized in that: the middle part of the body is provided with a bulge, two sides of the bulge are symmetrically provided with insulating sheets, and the insulating sheets are used for covering the whole area of the lug; a plurality of joint spare is equallyd divide to the body both sides, and the joint spare is used for joint insulating piece.

2. The lower plastic structure of claim 1, wherein: a positioning piece is arranged between the pole through hole and the protrusion, is of a U-shaped strip structure, and is installed on the body to form a U-shaped structure.

3. The lower plastic structure of claim 1, wherein: bosses are arranged at two ends of the body, the bosses are of hollow boss structures, and a plurality of welding spots are arranged on the bosses.

4. The lower plastic structure of claim 1, wherein: the clamping pieces are of L-shaped structures, and the clamping interfaces of each pair of clamping pieces are oppositely arranged.

5. The lower plastic structure of claim 1, wherein: the material of insulating piece is PP or PET, the material of body is PP or PPS.

6. The lower plastic structure of claim 1, wherein: the thickness of the insulating sheet is in the range of 0.2-0.5mm.

7. The lower plastic structure of claim 1, wherein: the insulating piece is the rectangular plate, and every right angle department is equipped with a breach.

8. The lower plastic structure of claim 1, wherein: annotate liquid hole through-hole and be located between arch and the setting element, it is equipped with additional strengthening to annotate liquid hole through-hole top.

9. A top cover assembly comprising the lower plastic structure of any one of claims 1-8.

10. A power battery, characterized by: comprising the lower plastic structure of any one of claims 1 to 8 or the lid assembly of claim 9.