CN210212989U

CN210212989U - Battery diaphragm cutting component and cutting device using same

Info

Publication number: CN210212989U
Application number: CN201920476411.6U
Authority: CN
Inventors: Yang Liu; 刘洋; Jinlong Dou; 窦金龙; Qiang Liu; 刘强
Original assignee: Zhongshan Jingyu Electronic Technology Co Ltd
Current assignee: Zhongshan Jingyu Electronic Technology Co Ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2020-03-31
Anticipated expiration: 2029-04-09

Abstract

The utility model discloses a battery diaphragm cutting component and a cutting device using the same, which comprises a blade body, wherein a plurality of concave-convex tooth parts are arranged on the blade body, and the tooth parts can conduct heat; this design simple structure has improved battery machining efficiency for battery packaging film leakproofness is good, improves the quality.

Description

Battery diaphragm cutting component and cutting device using same

Technical Field

The utility model relates to a battery processing field, especially battery diaphragm cutting part and cutting device.

Background

The current battery packaging film is generally an aluminum composite film, a steel composite film or a ceramic composite film, and the like, and an inner cavity capable of accommodating a battery roll core is formed by coating the diaphragm, the packaging film is internally provided with a PP film or other heating easily-melting glue layers, and the packaging film needs to be cut in the battery processing process, for example, in the opening position of the battery pack, as shown in fig. 1, the upper and lower surfaces of the opening position are the separators, and when the cutting segment cuts the separators on the upper and lower surfaces, since the separators have a certain elasticity, in the cutting process, the diaphragm on the upper surface can contact the diaphragm on the lower surface, meanwhile, the cutting section piece can conduct heat, the heat can melt the PP film or other heating meltable adhesive layers, so that the surface can adhere the diaphragm on the upper surface and the diaphragm on the lower surface by the pressure during cutting to close the opening position of the battery package;

however, when the battery packaging film is a ceramic composite film or a composite film with high hardness such as a toughened composite film, if the knife edge part 9 of the cutting section piece is parallel and level, the diaphragm is cut by a straight line parallel and level, the opening position of the packaging film is high in stress at the middle part of the cutting line, the upper surface diaphragm 81 and the lower surface diaphragm 82 at the opening position of the packaging film are stressed and can deviate from each other to be opened, so that the bonding is not firm, and the quality is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a cutting part with unsmooth form tooth portion to make the cutting position can not cut the battery diaphragm simultaneously on a straight line, but the multiple spot application of force makes the upper and lower diaphragm of battery packaging film can change the bonding in order to improve machining efficiency and quality.

The utility model adopts the technical proposal that:

battery diaphragm cutting member characterized by: including the cutting edge body, be provided with the tooth portion that a plurality of is concavo-convex on the cutting edge body to tooth portion can heat conduction.

The tooth part is provided with a knife entering inclined plane.

The knife edge body is provided with a pressing inclined plane which can be pressed on the battery diaphragm during cutting, and one side of the knife entering inclined plane extends to one side of the pressing inclined plane and is connected with one side of the pressing inclined plane.

The included angle of the abutting inclined plane relative to the vertical plane is larger than the included angle of the cutter entering inclined plane relative to the vertical plane.

The tooth part comprises a concave tooth section and a convex tooth section which are connected end to end.

The convex tooth section is pointed.

The convex tooth section is smooth.

A cutting device comprises a battery diaphragm cutting component and a driving component, wherein the driving component is connected with a blade body and can drive the blade body to cut a battery diaphragm.

The utility model has the advantages that:

the utility model discloses the cutting structure, tooth portion can heat conduction, at the in-process of cutting edge body cutting battery diaphragm, the protruding position of unsmooth tooth portion contacts the battery diaphragm earlier, progressively cut into again, can not cut the battery diaphragm simultaneously on a straight line, from this the central tension on the battery diaphragm is unloaded to a certain extent when the cutting, and by the position department of the first contact of unsmooth tooth portion, the laminating can be melted earlier under thermal driving about in the last diaphragm of packaging film and the easy glue-melting layer on the lower diaphragm, at the in-process that progressively cuts into, other positions progressively laminate again, this design simple structure, battery machining efficiency has been improved, make battery packaging film leakproofness good, and the quality is improved.

Drawings

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic view of a conventional battery separator cutting member.

Fig. 2 is a schematic front view of one embodiment of the cutting device of the present invention.

Fig. 3 is a schematic front view of another embodiment of the cutting device of the present invention.

Figure 4 is a side view of the cutting element of the present invention.

Detailed Description

As shown in fig. 2-4, the blade comprises a blade body 1, wherein a plurality of concave-convex teeth 2 are arranged on the blade body 1, and the teeth 2 can conduct heat.

The general battery diaphragm (exemplified by a ceramic composite film herein) comprises a ceramic layer and a PP layer (the PP layer may also be another easily-meltable adhesive layer) from outside to inside, the battery diaphragm surrounds to form a packaging film, a battery roll core can be placed in the packaging film, therefore, an upper surface diaphragm 81 and a lower surface diaphragm 82 are arranged at an opening position of the battery packaging film, the blade body 1 can be made of steel or other metals or alloy materials and can have certain heat conduction performance, the blade body 1 can have certain thickness or be a sheet shape, the blade body 1 can conduct heat to a tooth part so as to conduct heat to the PP layer during cutting, so that the PP layer is melted and bonded, and the upper surface diaphragm 81 and the lower surface diaphragm 82 are attached to seal the opening.

Tooth portion 2 can heat conduction, at the in-process of cutting battery diaphragm of cutting edge body 1, the protruding position of the tooth portion 2 of concave-convex shape contacts the battery diaphragm earlier, progressively cut into again, can not cut the battery diaphragm simultaneously on a straight line, from this central tension on the battery diaphragm is unloaded to a certain extent when the cutting, and in the position department of contacting earlier by tooth portion 2 of concave-convex shape, the easy melt glue film on the last diaphragm 81 of packaging film and the lower diaphragm 82 can melt the laminating earlier under thermal driving about, at the in-process that progressively cuts into, other positions are progressively laminated again, this design simple structure, the processing efficiency of the battery is improved, make the battery packaging film leakproofness good, and the quality is improved.

In some embodiments, as shown in fig. 2 and 3, the tooth portion 2 includes a concave tooth section 21 and a convex tooth section 22 connected end to end, where the convex tooth section 22 may be pointed, so that the pointed convex tooth section 22 can easily cut the battery separator and reduce the external force applied thereto when cutting, and the convex tooth section 22 may also be rounded, so that the rounded convex tooth section 22 is relatively smooth and can uniformly apply force after cutting into the battery separator, thereby improving the durability of the blade body, and of course, the concave tooth section 21 may also be pointed or rounded.

In some embodiments, as shown in fig. 4, the teeth 2 are provided with knife-in bevels 3, which knife-in bevels 3 enable the teeth to cut into the harder battery separator more smoothly and more easily.

In some embodiments, in order to enable the upper surface diaphragm 81 and the lower surface diaphragm 82 of the battery diaphragm to be easily close to each other after the blade body 1 cuts into the battery diaphragm, the blade body 1 is provided with a pressing inclined surface 4 which can be pressed against the battery diaphragm during cutting, and one side of the blade entering inclined surface 3 extends to one side of the pressing inclined surface 4 and is connected with one side of the pressing inclined surface 4, so that after the blade enters, a certain force is applied to the upper surface diaphragm 81 and the lower surface diaphragm 82 of the battery diaphragm by the pressing inclined surface 4, the two diaphragms are easily close to each other, and the upper surface diaphragm 81 and the lower surface diaphragm 82 can be quickly bonded after the easily-fusible adhesive layer is.

In some embodiments, the included angle α of the pressing inclined surface 4 relative to the vertical plane is larger than the included angle β of the knife entering inclined surface 3 relative to the vertical plane, so that the pressing effect is improved.

A cutting device comprises a battery diaphragm cutting component and a driving component 5, wherein the driving component 5 is connected with a blade body 1 and can drive the blade body 1 to cut a battery diaphragm.

In some embodiments, a heating element may also be included, the heating element being capable of heating the blade body or the teeth.

Wherein the driving part 5 may comprise a support and a cylinder or a motor arranged on the support, where it may be connected with the blade body 1 to cut the battery membrane.

The heating component can be a flame spraying component or an electric control heating component, the blade body 1 or the tooth parts 2 can be made of conductive metal materials, and the electric control heating component is connected with the blade body 1 or the tooth parts and is electrified to heat the tooth parts 2.

The above is only the preferred embodiment of the present invention, the present invention is not limited to the above embodiment, and the technical solution of the present invention is all within the protection scope of the present invention as long as the present invention is realized by the substantially same means.

Claims

1. Battery diaphragm cutting member characterized by: the cutting edge comprises a cutting edge body, wherein a plurality of concave-convex tooth parts are arranged on the cutting edge body, and the tooth parts can conduct heat; a cutter entering inclined plane is arranged on the tooth part; the knife edge body is provided with a pressing inclined plane which can be pressed on the battery diaphragm during cutting, and one side of the knife entering inclined plane extends to one side of the pressing inclined plane and is connected with one side of the pressing inclined plane.

2. The battery separator cutting member according to claim 1, wherein: the included angle of the abutting inclined plane relative to the vertical plane is larger than the included angle of the cutter entering inclined plane relative to the vertical plane.

3. The battery separator cutting member according to claim 2, wherein: the tooth part comprises a concave tooth section and a convex tooth section which are connected end to end.

4. The battery separator cutting member according to claim 3, wherein: the convex tooth section is pointed.

5. The battery separator cutting member according to claim 4, wherein: the convex tooth section is smooth.

6. A cutting device comprising a battery separator cutting member according to any of claims 1 to 5 and a driving member connected to the blade body and capable of driving the blade body to cut the battery separator.