CN216161779U - Head assembly and packaging equipment - Google Patents

Abstract

The utility model relates to the field of battery packaging, and discloses a sealing head assembly and packaging equipment, wherein the sealing head assembly comprises two sealing heads (8) with packaging surfaces, the packaging surfaces are provided with an inner packaging area (1), a middle packaging area (2) and an outer packaging area (3) which are sequentially arranged along the width direction, and the middle packaging area (2) protrudes relative to the inner packaging area (1) and the outer packaging area (3), so that sealant between battery packaging layers can be extruded. Through above-mentioned technical scheme, the sealed glue between the encapsulation layer of battery can be extruded in convex middle encapsulation district for sealed glue is cut off, avoids outside moisture to permeate to the battery through sealed glue inside, has improved the waterproof performance of battery, thereby has improved the security performance.

Description

Head assembly and packaging equipment

Technical Field

The utility model relates to the field of battery packaging, in particular to a sealing head assembly and packaging equipment.

Background

The end socket for packaging the soft package battery is designed in a plane, the packaging section of the packaged battery is PP glue + aluminum layer + Nylon/PET, the aluminum layer plays a role in preventing water for the battery, a contact layer between the inside of the aluminum and the battery is the PP layer, and the PP layer has no excellent water resistance, is not beneficial to sealing of the battery after packaging and seriously influences the cycle life of the battery; the encapsulation of laminate polymer battery mainly uses PP to glue and carries out the hot melt encapsulation under high temperature and pressure, because PP glues and belongs to soft plastics class material, and the packaging face is the plane, and encapsulation intensity receives very big restriction, makes the whole seal strength of battery lower, influences the security of battery.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an end socket assembly to solve the problem of insufficient waterproof performance of battery packaging.

In order to achieve the above object, in one aspect, the present invention provides a sealing head assembly, wherein the sealing head assembly includes two sealing heads having sealing surfaces, the sealing surfaces are provided with an inner sealing region, a middle sealing region and an outer sealing region, which are sequentially arranged along a width direction, and the middle sealing region protrudes relative to the inner sealing region and the outer sealing region, so that a sealant between battery sealing layers can be squeezed out.

Optionally, the surface of the pressing battery packaging layer of the middle packaging area is a flat surface.

Optionally, the height of the inner packaging region is greater than the height of the outer packaging region.

Optionally, a first transition curved surface is arranged between the inner packaging region and the middle packaging region, and a second transition curved surface is arranged between the outer packaging region and the middle packaging region.

Optionally, the curvature of the second transition curved surface is smaller than the curvature of the first transition curved surface.

Optionally, a transition inclined plane is arranged between the second transition curved surface and the outer packaging area.

Optionally, the width of the middle packaging area is 0.5mm-2 mm.

Optionally, the width of the inner packaging region is 1mm-8 mm.

Optionally, the two ends of the sealing head are provided with groove parts.

In addition, the utility model provides packaging equipment, wherein the packaging equipment comprises the seal head assembly.

Through above-mentioned technical scheme, the sealed glue between the encapsulation layer of battery can be extruded in convex middle encapsulation district for sealed glue is cut off, avoids outside moisture to permeate to the battery through sealed glue inside, has improved the waterproof performance of battery, thereby has improved the security performance.

Drawings

FIG. 1 is a perspective view of a closure assembly according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of a closure according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a closure assembly according to an embodiment of the present invention.

Description of the reference numerals

1 inner encapsulation area 2 intermediate encapsulation area

3 outer package region 4 first transition surface

5 second transition curved surface 6 transition inclined plane

7 groove part 8 seal head

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The utility model provides a seal head assembly, which comprises two seal heads 8 with packaging surfaces, wherein the packaging surfaces are provided with an inner packaging area 1, a middle packaging area 2 and an outer packaging area 3 which are sequentially arranged along the width direction, and the middle packaging area 2 protrudes relative to the inner packaging area 1 and the outer packaging area 3, so that sealant between battery packaging layers can be extruded.

As shown in fig. 1, the sealing head assembly includes two sealing heads 8, and the two sealing heads 8 can move relatively to extrude the battery packaging layer, so as to realize the packaging of the pouch battery.

The surfaces of the two seal heads 8 opposite to each other are packaging surfaces which are approximately in a long and narrow quadrilateral shape, the packaging surfaces are provided with an inner packaging area 1, a middle packaging area 2 and an outer packaging area 3 along the width direction, the height of the middle packaging area 2 is higher than the heights of the inner packaging area 1 and the outer packaging area 3 on the two sides of the middle packaging area, and the inner packaging area 1, the middle packaging area 2 and the outer packaging area 3 of the two seal heads 8 are respectively aligned.

When two heads 8 extrude the battery packaging edge, the distance between two middle packaging areas 2 is smaller than the distance between two inner packaging areas 1 and the distance between two outer packaging areas 3, when two heads 8 move to the distance between two middle packaging areas 2 which is a preset value, the sealant between the two packaging layers at the position can be extruded, the sealant only exists between the packaging layers (corresponding to the parts of the inner packaging areas 1 and the outer packaging areas 3) at the two sides of the middle packaging areas 2, the sealant forms a breakpoint between the packaging layers, and the phenomenon that the external moisture permeates into the battery through the sealant with poor waterproof performance is avoided.

Of course, in order to ensure the sealing property of the part of the encapsulation layer pressed by the middle encapsulation area 2, a subsequent treatment process may be added, so that the encapsulation layers are connected together here. For example, the encapsulation layer includes an inner aluminum layer and an outer layer of nylon/PET, and the two aluminum layers can be fused together by a heating process to form a seal.

In this scheme, the sealed glue between the encapsulation layer of battery can be extruded in convex middle encapsulation district for sealed glue is cut off, avoids outside moisture to permeate to the battery through sealed glue inside, has improved the sealing performance and the security performance of battery.

Wherein, the surface of the middle packaging area 2 pressing the battery packaging layer is a flat surface. The middle encapsulation area 2 is substantially a long and narrow quadrilateral plane as a whole, when the two middle encapsulation areas 2 extrude the double-layer encapsulation layers, the sealant between the two encapsulation layers can overflow to two sides or one side under the extrusion action of the two flat surfaces, so that the encapsulation layers can be in direct contact, for example, the aluminum layer can be in full direct contact, the sealant is broken into two parts, and the penetration of moisture can be prevented.

Wherein the height of the inner encapsulation area 1 is larger than the height of the outer encapsulation area 3. As shown in fig. 3, the height of the inner encapsulation area 1 is higher than that of the outer encapsulation area 3, accordingly, when the two sealing heads 8 squeeze the encapsulation layers, the space between the two inner encapsulation areas 1 is relatively smaller, and the space between the two outer encapsulation areas 3 is relatively larger, i.e. the thickness of the encapsulation layer between the inner encapsulation areas 1 is allowed to be smaller than that between the outer encapsulation areas 3, and such thickness difference is mainly reflected in the thickness of the sealant, i.e. the thickness of the sealant between the encapsulation layers between the outer encapsulation areas 3 is larger. Due to the structural design, when the sealant between the packaging layers is squeezed through the middle packaging region 2, the sealant can overflow outwards to the space between the packaging layers at the outer packaging region 3, and because the inner packaging region 1 is close to the inside of the battery, enough space is not provided for accommodating the overflowing sealant.

In addition, a first transitional curved surface 4 is arranged between the inner packaging area 1 and the middle packaging area 2, and a second transitional curved surface 5 is arranged between the outer packaging area 3 and the middle packaging area 2. The transition curved surfaces on the two sides can realize smooth transition between the middle packaging area 2 and the inner packaging area 1 and the outer packaging area 3, and avoid a structure with large height difference, so as to better protect the packaging layer. The transition curve may act as a guide for the sealant, which may be achieved by changing the shape of the encapsulation layer at that location. The curved transitions may each be joined smoothly, i.e. without a sharp boundary, to the intermediate package region 2, for example the curved transitions may be circular arcs, the tangent to the joining location of the intermediate package region 2 coinciding with the surface of the intermediate package region 2.

Further, the curvature of the second curved transitional surface 5 is smaller than that of the first curved transitional surface 4. The curvature radius of the second transitional curved surface 5 is larger than that of the first transitional curved surface 4, the second transitional curved surface 5 is relatively more gentle, accordingly, the packaging layer attached to the second transitional curved surface 5 is more gentle, and the sealant can overflow to the external packaging area 3 more easily.

In addition, a transition inclined plane 6 is arranged between the second transition curved surface 5 and the outer packaging area 3. The height difference between the middle packaging area 2 and the outer packaging area 3 is relatively large, therefore, an additional transition inclined plane 6 can be added on the basis of the second transition curved surface 5, the smooth transition between the middle packaging area 2 and the outer packaging area 3 is realized, the sealant can enter the space between the packaging layers at the outer packaging area 3 more easily, and the transition inclined plane 6 can be a flat surface.

Wherein the width of the middle packaging area 2 is 0.5mm-2 mm. This width corresponds approximately to the width of the part between the encapsulating layers where no sealant is present. Of course, other sizes of the intermediate package region 2 may be selected depending on the size and structure of the battery to be packaged.

In addition, the width of the inner packaging region 1 is 1mm-8 mm. The width of the inner packaging region 1 corresponds to the width of the packaging layer containing the sealant near the inner part of the battery, different sizes can be selected according to different batteries, and end sockets with corresponding sizes are used. The sealing structure of the encapsulation layer at the inner encapsulation region 1 can prevent the substance inside the battery from leaking to the outside.

In addition, the two ends of the seal head 8 are provided with groove parts 7. As shown in fig. 1 and fig. 2, the two ends of the sealing surface of the sealing head 8 are respectively provided with the groove portions 7, the distance between the two groove portions 7 is related to the width of the packaged battery, and the distance can be equal to or less than the width of the battery, so as to allow the sealant between the packaging layers to overflow into the groove portions 7, and avoid the overflow glue from being blocked to influence the packaging quality.

In addition, the utility model also provides packaging equipment, wherein the packaging equipment comprises the seal head assembly in the scheme. The packaging equipment supports and drives the end socket assembly through other components, so that the two end sockets can move towards and away from each other, and the extrusion and packaging of the battery packaging layer are realized.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, numerous simple modifications can be made to the technical solution of the utility model, including combinations of the individual specific technical features in any suitable way. The utility model is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (10)

1. The utility model provides a head subassembly, its characterized in that, the head subassembly includes two head (8) that have the encapsulated surface, be provided with inside encapsulation district (1), middle encapsulation district (2) and outside encapsulation district (3) that arrange in proper order along width direction on the encapsulated surface, middle encapsulation district (2) for inside encapsulation district (1) with outside encapsulation district (3) protrusion to can extrude sealed glue between the battery encapsulation layer.

2. A header assembly according to claim 1, wherein the surface of the intermediate encapsulation zone (2) pressing the cell encapsulation layer is a flat surface.

3. A head assembly according to claim 1, wherein the height of the inner containment zone (1) is greater than the height of the outer containment zone (3).

4. A head assembly according to claim 3, characterized in that a first transition curve (4) is provided between the inner encapsulation zone (1) and the intermediate encapsulation zone (2), and a second transition curve (5) is provided between the outer encapsulation zone (3) and the intermediate encapsulation zone (2).

5. A head assembly according to claim 4, wherein the curvature of the second curved transition surface (5) is smaller than the curvature of the first curved transition surface (4).

6. A closure assembly according to claim 4, wherein a transition ramp (6) is provided between the second transition curve (5) and the outer sealing zone (3).

7. A head assembly according to claim 1, wherein the width of the intermediate encapsulation zone (2) is 0.5-2 mm.

8. A head assembly according to claim 1, wherein the width of the inner containment zone (1) is 1-8 mm.

9. A closure assembly according to claim 1, wherein both ends of the closure (8) are provided with a groove portion (7).

10. A packaging apparatus, characterized in that it comprises a header assembly according to any one of claims 1-9.

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