CN217823153U - Naked electric core insulation system and secondary battery - Google Patents

Abstract

The utility model relates to a naked electric core insulation system and secondary battery for wrap up naked electric core, including naked electric core insulating piece and rule bottom plate, rule bottom plate is dull and stereotyped structure, the surface of rule bottom plate is the rectangle form of rule, rule bottom plate laminate in on the naked electric core insulating piece. Compared with the prior art, the utility model discloses can reduce the hot melt process of bottom plate and naked electric core insulating piece, the save time cost avoids burr or the welding back salient point that the hot melt process brought to cause the problem of scratch or other harm to naked electric core.

Description

Naked electric core insulation system and secondary battery

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a naked electric core insulation system and secondary battery are related to.

Background

Secondary battery includes naked electric core and aluminium casing, for preventing the damage of naked electric core, prior art adopts naked electric core insulating piece and bottom plate to wrap up in the outside of naked electric core, specifically as follows:

referring to fig. 1 to 3, the bare cell insulation sheet includes a first substrate 11, a second substrate 12, and a third substrate 13 connected in sequence, a first bottom fold 41 is disposed at a joint of the first substrate 11 and the second substrate 12, and a second bottom fold 42 is disposed at a joint of the second substrate 12 and the third substrate 13. The second substrate 12 is connected with a bottom supporting plate 2 in a hot melting mode, the bottom supporting plate 2 is of a flat plate structure, two sides, used for connecting the first substrate 11 and the third substrate 13, of the bottom supporting plate 2 are of irregular structures, two first positioning holes 31 are formed in the second substrate 12, two second positioning holes 32 corresponding to the first positioning holes 31 in the hot melting mode are formed in the bottom supporting plate 2, and after hot melting is conducted, hot melting prints 5 are reserved on the surface of the bottom supporting plate 2. According to the above description, the hot-melt assembly of the bare cell insulation sheet and the bottom support plate of the prior art has the following problems:

(1) During hot melting, the positioning is only carried out through the first positioning hole 31 and the second positioning hole 32, the joint of the first substrate 11 and the second substrate 12 is provided with the first bottom crease 41, the joint of the second substrate 12 and the third substrate 13 is provided with the second bottom crease 42, the simple positioning operation and the fixed creases easily cause inaccurate process positioning, and the naked electric core insulating sheet after hot melting has wrinkles.

(2) After hot melting, a hot-melting welding print 5 is left on the bottom supporting plate 2, and residues such as residues, drawn wires or convex hulls are left on the surface of the hot-melting welding print 5, so that the bare cell is damaged.

(3) Naked electric core insulating piece crease is many, and bottom plate 2 irregular shapes lead to the processing with the high cost that detects.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a naked electric core insulation system and secondary battery in order to overcome the defect that above-mentioned prior art exists, this utility model can reduce the hot melt process of bottom plate board and naked electric core insulating piece, and save time cost avoids burr or the welding back protruding point that the hot melt process brought to cause the problem of scratch or other harm to naked electric core.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a naked electric core insulation system for wrap up naked electric core, including naked electric core insulating piece and rule bottom plate, rule bottom plate is dull and stereotyped structure, the surface of rule bottom plate is the rectangle form of rule, rule bottom plate laminate in on the naked electric core insulating piece.

Preferably, naked electric core insulating piece is including the first substrate, second substrate and the third substrate that connect gradually, first substrate with the second substrate and the second substrate with no crease is connected between the third substrate, regular bottom plate laminating in on the second substrate.

Preferably, the second substrate is of a shape and size corresponding to both corresponding faces of the regular backing plate.

Preferably, two first positioning holes penetrate through the second substrate.

Preferably, the regular bottom support plate is provided with two second positioning holes corresponding to the first positioning holes.

Preferably, a gluing layer is arranged on the joint surface of the regular bottom supporting plate and the second substrate.

Preferably, the regular bottom support plate is positioned by the first positioning hole and the second positioning hole and is attached to the second substrate by the adhesive layer.

The utility model provides a secondary battery, including the aluminum hull casing and arrange the naked electric core in the aluminum hull casing in, secondary battery still includes as above naked electric core insulation system, naked battery insulation system wrap up in the surface of naked electric core.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses change the anomalous bottom plate among the prior art into the regular bottom plate that surface shape is the rectangle to it is connected to design no crease between first substrate and second substrate and the third substrate, make and buckle through regular bottom plate between first substrate and second substrate and the third substrate, the fold that produces when having reduced naked electric core insulating piece and buckling, and reduced manufacturing procedure, reduction in production time cost.

2. The utility model discloses lower surface at rule bottom plate is equipped with the rubber coating layer, and on rule bottom plate passed through the rubber coating layer and fitted in the second substrate, reduced the hot melt process of prior art insole layer board and naked electric core insulating piece, burr or welding back arch point pair that have avoided bringing after the hot melt caused the problem of scratch or other harm to naked electric core.

Drawings

Fig. 1 is a schematic structural diagram of a bare cell insulation sheet in the prior art;

FIG. 2 is a schematic diagram of a prior art bottom plate;

fig. 3 is a schematic view of an assembly structure of an insulating sheet and a bottom support plate of a bare cell in the prior art;

fig. 4 is a schematic structural diagram of a bare cell insulation structure provided in this embodiment;

FIG. 5 is a front view of the regular bottom bracket plate of the embodiment of FIG. 4;

FIG. 6 is a side view of the regular bottom bracket plate of the embodiment shown in FIG. 4;

fig. 7 is a schematic structural diagram of an insulating sheet of a bare cell in the embodiment shown in fig. 4;

fig. 8 is an assembly view of the structure of the embodiment shown in fig. 4.

The notation in the figure is:

11. the first substrate, 12, the second substrate, 13, the third substrate, 2, the bottom support plate, 31, the first positioning hole, 32, the second positioning hole, 41, the first bottom crease, 42, the second bottom crease, 5, the hot-melt welding seal, 6, the regular bottom support plate, 7 and the glue coating layer.

Detailed Description

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

The embodiment is as follows:

as shown in fig. 4-8, the utility model provides a naked electric core insulation system, include: naked electric core insulating piece and regular bottom plate 6, naked electric core insulating piece are including the first substrate 11, second substrate 12 and the third substrate 13 that connect gradually, first substrate 11, second substrate 12 and 13 integrated into one piece of third substrate, and do not have the crease between the adjacent substrate and connect. Wherein, first substrate 11 is used for wrapping up the first wide side and the narrow side of naked electric core, and third substrate 13 is used for wrapping up the wide side and the narrow side of second of naked electric core, and second substrate 12 is used for wrapping up the bottom of naked electric core, is equipped with two first locating holes 31 on the second substrate 12.

The regular bottom supporting plate 6 is of a flat plate structure, the surface of the regular bottom supporting plate 6 is in a regular rectangular shape, the shapes and the sizes of two corresponding surfaces of the regular bottom supporting plate 6 and the second substrate 12 are consistent, two second positioning holes 32 corresponding to the second substrate 12 are arranged on the regular bottom supporting plate 6, and a glue coating layer 7 is arranged on the lower surface of the regular bottom supporting plate 6.

This embodiment still provides a secondary battery, include the aluminium hull casing and arrange the naked electric core in the aluminium hull casing in, secondary battery still includes as above a naked electric core insulating piece structure, naked battery insulating piece structure wrap up in the surface of naked electric core.

The assembly and the beneficial effect of a naked electric core insulation system that this embodiment provided are as follows:

the second substrate 12 and the regular bottom pallet 6 are positioned by the two first positioning holes 31 and the two second positioning holes 32, and after positioning, the regular bottom pallet 6 and the second substrate 12 are attached by the glue coating layer 7.

In the embodiment, the irregular bottom support plate 2 in the prior art is changed into the rectangular regular bottom support plate 6 easy to process, meanwhile, the joints of the first substrate 11, the second substrate 12 and the third substrate 13 are free of creases, when the naked electric core is wrapped by the naked electric core insulation structure provided by the embodiment, the naked electric core insulation sheet is bent through the shape of the regular bottom support plate 6, and the processing and detection cost is reduced. The gluing layer 7 is arranged on the binding face of the regular bottom supporting plate 1 and the second substrate 12 and used for binding the second substrate 12, the gluing process is easier to process than the existing hot melting process, and is smoother after binding, the scratch or other damages to the battery cell and the aluminum shell caused by burrs caused by hot melting or protruding points after welding are reduced, and the time cost can be saved.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection determined by the claims.

Claims (7)

1. The utility model provides a naked electric core insulation system for wrap up naked electric core, its characterized in that, including naked electric core insulating piece and regular bottom plate (6), regular bottom plate (6) are the flat structure, the surface of regular bottom plate (6) is the rectangle form of rule, regular bottom plate (6) laminate in on the naked electric core insulating piece;

naked electric core insulating piece is including first substrate (11), second substrate (12) and third substrate (13) that connect gradually, first substrate (11) with second substrate (12) and second substrate (12) with no crease is connected between third substrate (13), regular bottom plate board (6) laminate in on the second substrate (12).

2. A bare cell insulation structure according to claim 1, wherein the second substrate (12) is of the same shape and size as the two corresponding faces of the regular bottom carrier (6).

3. A bare cell insulation structure according to claim 2, wherein two first positioning holes (31) are formed through the second substrate (12).

4. The bare cell insulation structure according to claim 3, wherein two second positioning holes (32) corresponding to the first positioning holes (31) are formed in the regular bottom support plate (6).

5. The bare cell insulation structure according to claim 4, wherein a glue layer (7) is provided on the joint surface of the regular bottom support plate (6) and the second substrate (12).

6. The bare cell insulation structure according to claim 5, wherein the regular bottom support plate (6) is positioned by the first positioning hole (31) and the second positioning hole (32), and is attached to the second substrate (12) by the glue coating layer (7).

7. A secondary battery comprises an aluminum shell and a bare cell arranged in the aluminum shell, and is characterized in that the secondary battery further comprises the bare cell insulation structure of any one of claims 1 to 6, and the bare cell insulation structure wraps the outer surface of the bare cell.

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