CN209912900U

CN209912900U - Packaging end socket

Info

Publication number: CN209912900U
Application number: CN201920968138.9U
Authority: CN
Inventors: 刘异鹏; 张磊; 杨吉元
Original assignee: Dongguan Amperex Technology Ltd
Current assignee: Dongguan Amperex Technology Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-01-07
Anticipated expiration: 2029-06-25

Abstract

The application discloses encapsulation head, including first head and with the second head that first head corresponds, first head includes the orientation the first terminal surface of second head, the second head includes the orientation the second terminal surface of first head, first terminal surface with second terminal surface phase-match. The first end face and the second end face respectively comprise a first packaging area and a second packaging area connected with the first packaging area, and the width of the second packaging area is larger than that of the first packaging area.

Description

Packaging end socket

Technical Field

The application relates to the field of batteries, in particular to a packaging end socket for packaging a battery packaging film.

Background

In the packaging process of the soft package lithium ion battery, the aluminum plastic films of the upper layer and the lower layer need to be thermally fused through the end sockets so as to seal the battery cell in the aluminum plastic films. However, the width of the sealing end face of the existing sealing head is the same, and if the upper and lower layers of the aluminum-plastic films are dislocated before packaging, or the top sealing edge of the air bag is slightly inclined when the aluminum-plastic films are cut, or the cross sealing of the top sealing edge and the side sealing edge is insufficient, the weak sealing part is washed away due to insufficient sealing width in subsequent processes of air suction, formation and the like of the battery cell, and then liquid leakage and other risks occur.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a sealing head capable of improving the sealing effect of the top edge sealing.

The application provides a packaging head, including first head and with the second head that first head corresponds, first head includes the orientation the first terminal surface of second head, the second head includes the orientation the second terminal surface of first head, first terminal surface with the second terminal surface phase-match, its characterized in that, first terminal surface reaches the second terminal surface all include first encapsulation region and with the second encapsulation region that first encapsulation region is connected, the width that the second encapsulated region is greater than the width of first encapsulation region.

Optionally, the first end surface further includes a third encapsulation area connected to the first encapsulation area, and the first encapsulation area is disposed between the third encapsulation area and the second encapsulation area;

wherein, one side of the first packaging area, one side of the second packaging area and one side of the third packaging area are flush, and the width of the second packaging area and the width of the third packaging area are all larger than the width of the first packaging area.

In some embodiments of the present application, when the width of the object to be packaged is defined as W and the length of the first packaging region is defined as B, W and B satisfy the following formula: w +0.2mm and B less than or equal to W +5 mm.

In some embodiments of the present application, a width of the first encapsulation area is defined as E, and a width of the third encapsulation area is defined as D, then E and D satisfy the following formula: e +0.3mm is less than or equal to D is less than or equal to E +5 mm.

In some embodiments of the present application, a width of the second encapsulation area is defined as F, and then E and F satisfy the following formula: e +0.3mm is less than or equal to F and less than or equal to E +5 mm.

In some embodiments of the present application, the first sealing head is further provided with a first glue overflow groove, and the first glue overflow groove is located on one side of the second encapsulation area, which is far away from the first encapsulation area.

In some embodiments of the present application, the first sealing head is further provided with a second glue overflow groove, and the second glue overflow groove is located on one side of the third encapsulation area, which is far away from the first encapsulation area.

In some embodiments of the present application, the first seal head further includes a first positioning portion located on both sides of the first end surface, the second seal head further includes a second positioning portion located on both sides of the second end surface, the first positioning portion is provided with a bump, the second positioning portion is provided with a groove, and the bump corresponds to the groove.

In some embodiments of the present application, the encapsulation head further includes a first base and a second base, the first head is disposed on the first base, and the second head is disposed on the second base.

In some embodiments of this application, the encapsulation head still includes first auxiliary heating piece and second auxiliary heating piece, first auxiliary heating piece be located on the first base and with the first encapsulation area of first head corresponds, second auxiliary heating piece be located on the second base and with the first encapsulation area of second head corresponds, first auxiliary heating piece with second auxiliary heating piece corresponds.

This application is through setting up the width in second encapsulation area is greater than the width in first encapsulation area makes the width of air pocket banding increases relatively, even if the aluminium-plastic film of upper and lower floor takes place to misplace before the encapsulation and causes the top banding of air pocket department crooked when cutting the aluminium-plastic film, can both guarantee the air pocket banding has sufficient seal width, thereby guarantees the aluminium-plastic film has good encapsulation effect, reduces the weeping risk, improves the battery security performance.

Drawings

Fig. 1 is a schematic structural diagram of a package head according to an embodiment of the present application.

Fig. 2 is a schematic structural view of the encapsulation head shown in fig. 1 at another angle.

Fig. 3 is an exploded view of the encapsulation head shown in fig. 1.

Fig. 4 is a schematic structural view of the first header of the encapsulation header shown in fig. 1.

Fig. 5 is a schematic end view of the first header of the encapsulation header shown in fig. 3.

Fig. 6 is a schematic end view of the second header of the encapsulation header shown in fig. 4.

Description of the main elements

First end socket 10

First end face 11

The first glue overflow groove 12

Second glue overflow groove 13

First positioning portion 14

First base 15

First auxiliary heating block 16

Fastener 17

Second end socket 20

Second end face 21

Second positioning part 22

Second base 23

Second auxiliary heating block 24

Encapsulation seal head 100

First encapsulation area

111, 211

Second encapsulation area

112, 212

Third encapsulation area

113, 213

Bump 140

Groove 220

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 to 4, an embodiment of the present application provides a package head 100 for packaging a packaging film (such as an aluminum plastic film, not shown). The packaging end socket 100 comprises a first end socket 10 and a second end socket 20 corresponding to the first end socket 10. The first seal head 10 comprises a first end face 11 facing the second seal head 20, the second seal head 20 comprises a second end face 21 facing the first seal head 10, and the first end face 11 is matched with the second end face 21. The first end surface 11 includes a first package region 111 and a second package region 112 connected to the first package region 111. The second end surface 21 includes a first package region 211 and a second package region 212 connected to the first package region 211. The width of the second encapsulation area 112 is greater than the width of the first encapsulation area 111, and the width of the second encapsulation area 212 is greater than the width of the first encapsulation area 211.

When the packaging structure is used, a packaging film containing a battery cell can be arranged between the first end socket 10 and the second end socket 20, so that the

first packaging areas

111 and 211 correspond to the battery cell. Applying a temperature and a pressure to the upper and lower surfaces of the packaging film, respectively, to fuse the packaging film, thereby forming a top edge seal and an air pocket edge seal in the packaging film. Wherein the top edge seal corresponds to the

first package region

111, 211 and the air bag edge seal corresponds to the

second package region

112, 212. By setting the widths of the

second packaging areas

112 and 212 to be larger than the widths of the

first packaging areas

111 and 211, the width of the air bag edge sealing is relatively increased, even if the upper and lower aluminum plastic films are staggered before packaging to cause the top edge sealing of the air bag to be inclined when the aluminum plastic films are cut, the effective sealing width of the air bag edge sealing can be ensured to be larger than a first preset width (such as 0.8mm), and the packaging film is ensured to have a good packaging effect.

In this embodiment, the first end surface 11 further includes a third encapsulation region 113 connected to the first encapsulation region 111, and the first encapsulation region 111 is disposed between the third encapsulation region 113 and the second encapsulation region 112. The second end face 21 further includes a third package region 213 connected to the first package region 211, and the first package region 211 is disposed between the third package region 213 and the second package region 212. Wherein, one side of the first package region 111, the second package region 112 and the third package region 113 is flush, and the width of the second package region 112 and the third package region 113 is larger than the width of the first package region 111. One side of the first package region 211, one side of the second package region 212, and one side of the third package region 213 are flush, and the widths of the second package region 212 and the third package region 213 are greater than the width of the first package region 211.

In use, the

third encapsulation area

113, 213 is used to form an extended edge seal in the encapsulation film. I.e. the extended seal corresponds to the

third encapsulation area

113, 213. By setting the widths of the

third encapsulation areas

113 and 213 to be greater than the width of the first encapsulation area 111, the width of the extension seal edge is relatively increased, and even if a side seal head (not shown) is relatively lowered, the width of the cross seal between the extension seal edge and the side seal edge (corresponding to the side seal head) can be ensured to be greater than a second preset width (e.g., 0.5mm), so that the encapsulation film is further ensured to have a good encapsulation effect.

Referring to fig. 5 and fig. 6, in the present embodiment, a width of the object to be packaged is defined as W (not shown), and a length of the

first packaging region

111, 211 is defined as B, W and B satisfy the following formula: w +0.2mm and B less than or equal to W +5 mm. The object to be packaged can be a battery cell.

Defining the width of the

first encapsulation area

111, 211 as E and the width of the

third encapsulation area

113, 213 as D, then E and D satisfy the following formula: e +0.3mm is less than or equal to D is less than or equal to E +5 mm. Further, E also satisfies the following formula: e is more than or equal to 0.5mm and less than or equal to 3 mm. Further, defining the length of the

third encapsulation area

113, 213 as a, a also satisfies the following formula: a is more than or equal to 1mm and less than or equal to 10 mm.

Defining the width of the

second encapsulation area

112, 212 as F, E and F satisfy the following formula: e +0.3mm is less than or equal to F and less than or equal to E +5 mm. Further, defining the length of the

second encapsulation area

112, 212 as C, C satisfies the following formula: c is more than or equal to 15 mm.

As shown in fig. 3 and 4, in the present embodiment, the first sealing head 10 and the second sealing head 20 are further provided with a first glue overflow groove 12, and the first glue overflow groove 12 is located on a side of the

second encapsulation area

112, 212 far away from the

first encapsulation area

111, 211. The first glue overflow grooves 12 of the first seal head 10 and the second seal head 20 correspond to each other. When the packaging film is used, one end of the packaging film corresponds to the first glue overflow groove 12, and the first glue overflow groove 12 can accommodate glue overflow, so that the glue overflow in the

second packaging area

112, 212 is reduced, and the safety performance and the service life of the battery are improved.

Further, the first sealing head 10 and the second sealing head 20 are further provided with a second glue overflow groove 13, and the second glue overflow groove 13 is located on one side of the third encapsulation area 213, which is far away from the first encapsulation area 211. The first seal head 10 corresponds to the second glue overflow groove 13 of the second seal head 20. When the battery is used, the other end of the packaging film corresponds to the second glue overflow groove 13, and the second glue overflow groove 13 can also accommodate glue overflow, so that the glue overflow in the third packaging area 213 is reduced, and the safety performance and the service life of the battery are further improved.

In this embodiment, the first sealing head 10 further includes first positioning portions 14 located on two sides of the first end surface 11, the second sealing head 20 further includes second positioning portions 22 located on two sides of the second end surface 21, the first positioning portions 14 are provided with protrusions 140, the second positioning portions 22 are provided with grooves 220, and the protrusions 140 correspond to the grooves 220. Thus, the first sealing head 10 and the second sealing head 20 can be fixed by the projection 140 and the groove 220.

In this embodiment, the sealing head 100 further includes a first base 15 and a second base 23, the first head 10 is disposed on the first base 15, and the second head 20 is disposed on the second base 23.

Further, the packaging head 100 further includes a first auxiliary heating block 16 and a second auxiliary heating block 24, the first auxiliary heating block 16 is located on the first base 15 and corresponds to the first packaging area 111 of the first head 10, and the second auxiliary heating block 24 is located on the second base 23 and corresponds to the first packaging area 211 of the second head 20. The first auxiliary heating block 16 corresponds to the second auxiliary heating block 24. Wherein the first auxiliary heating block 16 and/or the second auxiliary heating block 24 can be fixed on the first base 15 and the second base 23 respectively by fasteners 17 (such as bolts, see fig. 2). When the battery is used, the tabs of the battery cell extend out of the

first packaging areas

111 and 211 and correspond to the first auxiliary heating block 16 and the second auxiliary heating block 24. The first auxiliary heating block 16 and the second auxiliary heating block 24 are used for heating tab glue arranged on the surface of the tab.

According to the application, the width of the second packaging area is larger than that of the first packaging area, so that the width of the air bag sealing edge is relatively increased, and the air bag sealing edge can be ensured to have enough sealing width, so that the aluminum plastic film is ensured to have a good packaging effect, the liquid leakage risk is reduced, and the safety performance of a battery is improved; furthermore, through setting up the regional width of third encapsulation is greater than the regional width of first encapsulation, makes the width of extension banding also increases relatively, even if the side seal head position leans on down relatively, also can guarantee it has sufficient alternately seal with the side seal, thereby further guarantees the plastic-aluminum membrane has good packaging effect, reduces the weeping risk, improves the battery security performance.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a packaging end socket, include first head and with the second head that first head corresponds, first head includes the orientation the first terminal surface of second head, the second head includes the orientation the second terminal surface of first head, first terminal surface with the second terminal surface phase-match, its characterized in that, first terminal surface reaches the second terminal surface all include first encapsulation region and with the second encapsulation region that first encapsulation region is connected, the width of second encapsulation region is greater than the width of first encapsulation region.

2. The packaging header of claim 1, wherein the first end face further comprises a third packaging region connected to the first packaging region, the first packaging region disposed between the third packaging region and the second packaging region;

3. The packaging header of claim 2, wherein when the width of the object to be packaged is defined as W and the length of the first packaging region is defined as B, W and B satisfy the following formula: w +0.2mm and B less than or equal to W +5 mm.

4. The packaging header of claim 2, wherein a width of the first packaging region is defined as E and a width of the third packaging region is defined as D, then E and D satisfy the following equation: e +0.3mm is less than or equal to D is less than or equal to E +5 mm.

5. The packaging header of claim 4, wherein a width of the second packaging region is defined as F, and E and F satisfy the following equation: e +0.3mm is less than or equal to F and less than or equal to E +5 mm.

6. The packaging head of claim 2 wherein the first head further comprises a first glue overflow groove located on a side of the second packaging region away from the first packaging region.

7. The packaging head of claim 6 wherein the first head is further provided with a second glue overflow groove located on a side of the third packaging region away from the first packaging region.

8. The packaging head of claim 1 wherein the first head further comprises first positioning portions on two sides of the first end surface, the second head further comprises second positioning portions on two sides of the second end surface, the first positioning portions are provided with bumps, the second positioning portions are provided with grooves, and the bumps correspond to the grooves.

9. The packaging enclosure of any of claims 1-8, further comprising a first base on which the first enclosure is disposed and a second base on which the second enclosure is disposed.

10. The packaging head of claim 9 further comprising a first auxiliary heating block on the first base and corresponding to the first packaging region of the first head and a second auxiliary heating block on the second base and corresponding to the first packaging region of the second head, the first auxiliary heating block corresponding to the second auxiliary heating block.