CN205602398U - Packaging film and secondary cell - Google Patents
Packaging film and secondary cell Download PDFInfo
- Publication number
- CN205602398U CN205602398U CN201620101806.4U CN201620101806U CN205602398U CN 205602398 U CN205602398 U CN 205602398U CN 201620101806 U CN201620101806 U CN 201620101806U CN 205602398 U CN205602398 U CN 205602398U
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- Prior art keywords
- packaging film
- arc angling
- angling portion
- curvature
- radius
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model provides a packaging film and secondary cell, packaging film have a surface, dash the hole by what the first side wall, second lateral wall, third lateral wall, fourth lateral wall and diapire formed. It follows the arc chamfer portion that the length direction of packaging film extended to the curvature radius gradual change on a surface to be formed with the follow the first side wall between the first side wall and the top surface. At follow -up folding in -process, because the crooked degree of arc chamfer portion is little, it is inseparable with the laminating of electric core fold the back packaging film in arc chamfer portion to make the full packing of electric core, and can not produce stress concentration, and then avoided secondary cell to play to stick up the phenomenon because of the afterbody appears in shrinkage/swelling in cyclic process.
Description
Technical field
This utility model relates to field of batteries, particularly relates to a kind of packaging film and secondary cell.
Background technology
The outer package of lithium ion battery at present uses aluminum plastic film, when lithium ion battery is packaged, first aluminum plastic film is carried out punch forming, conventional punch forming process is by the cavity of battery container and cladding aluminum plastic film integrated punching, then battery core is put in cavity, in the way of doubling, the aluminum plastic film of cladding is prolonged bottom fold doubling, battery is carried out closedtop and side seal, thus realizes the encapsulation to battery core.
Fig. 7 is the axonometric chart viewed from above before packaging film of the prior art folds；Fig. 8 is the enlarged side view of Fig. 7；Fig. 9 is the axonometric chart viewed from above after the packaging film folding of Fig. 7；Figure 10 is the enlarged side view of Fig. 9.
As shown in Figure 7 to 10, packaging film 1 has top surface 11 and has and rushed hole 12 by what the first side wall the 121, second sidewall the 122, the 3rd sidewall the 123, the 4th sidewall 124 and diapire 125 were formed, is formed with the fillet part 13 ' of the single radius of curvature extending to top surface 11 from the first side wall 121 along the length direction L of packaging film between the first side wall 121 and top surface 11.In the prior art, set fillet part 13 ' is the least for single radius of curvature and radius of curvature, to packaging film 1, particularly hole is deep > packaging film 1 of 3mm is when carrying out punching press, the packaging film 1 that punching is cheated out is when being packaged battery core, make fillet part 13 ' degree of crook big owing to the radius of curvature of fillet part 13 ' is little, at packaging film 1 along during fold line 14 inflection, the directly bending of basic one-tenth, there is the secondary cell of this kind of encapsulating structure, folding process forms sharper corner angle in burst (i.e. the part of the close fold line 14 of packaging film 1), the tightst with the laminating of battery core main body, therefore exist and space between space packaging film 1 and battery core, can be there is, easily gather electrolyte, and burst easily produces stress and concentrates, easily collided by foreign object, cause cracking or damaged；Additionally, the stress that burst produces when folding is concentrated, when battery is carried out discharge and recharge, charging process expands, discharge process shrinks, constantly dilation causes the afterbody (i.e. the position of the correspondence i.e. close fold line 14 of packaging film 1) of battery packaging film 1 to warp, and affects battery core thickness, thus affects the normal use of battery.
Utility model content
In view of problem present in background technology, the purpose of this utility model is to provide a kind of packaging film and secondary cell, described packaging film makes the full filling of battery core when encapsulating secondary cell, and stress will not be produced concentrate, it is to avoid secondary cell occurs because of dilation that in cyclic process afterbody warps phenomenon.
To achieve these goals, in first aspect, this utility model provides a kind of packaging film, and it has top surface and has and rushed hole by what the first side wall, the second sidewall, the 3rd sidewall, the 4th sidewall and diapire were formed.Wherein, the arc angling portion of the radius of curvature gradual change extending to top surface from the first side wall along the length direction of packaging film it is formed with between the first side wall and top surface.
In second aspect, this utility model provides a kind of secondary cell, and it uses according to the packaging film described in this utility model first aspect.
The beneficial effects of the utility model are as follows:
According in packaging film of the present utility model, the radius of curvature in whole arc angling portion is gradual change, and arc angling portion is simultaneously tangent with the top surface of the first side wall in punching hole and packaging film, so that can be connected by rounding off between the first side wall and the top surface of packaging film in punching hole.Follow-up along fold line folding process, owing to arc angling portion is actually an arcwall face, degree of crook is little, so packaging film is tight with the battery core laminating being placed in punching hole after folding in arc angling portion, it is filled in punching hole so that battery core is full, and stress will not be produced concentrate, and then avoid secondary cell in cyclic process, occur because of dilation that afterbody warps phenomenon.
Accompanying drawing explanation
Fig. 1 is the axonometric chart viewed from above before folding according to packaging film of the present utility model；
Fig. 2 is the axonometric chart observed from below of the packaging film of Fig. 1；
Fig. 3 is the enlarged side view of Fig. 1；
Fig. 4 is that the packaging film of Fig. 1 is along the axonometric chart viewed from above after fold line folding；
Fig. 5 is the axonometric chart observed from below of the packaging film of Fig. 4；
Fig. 6 is the enlarged side view of Fig. 4；
Fig. 7 is the axonometric chart viewed from above before packaging film of the prior art folds；
Fig. 8 is the enlarged side view of Fig. 7；
Fig. 9 is the axonometric chart viewed from above after the packaging film folding of Fig. 7；
Figure 10 is the enlarged side view of Fig. 9.
Wherein, description of reference numerals is as follows:
1 packaging film 13 arc angling portion
11 top surface 14 fold lines
12 punching hole A primary importances
The 121 the first side wall B second positions
122 second sidewall L length directions
123 the 3rd sidewall D widths
124 the 4th sidewall 13 ' fillet parts
125 diapires
Detailed description of the invention
Describe in detail with reference to the accompanying drawings according to packaging film of the present utility model and secondary cell.
First packaging film according to this utility model first aspect is described.
Referring to figs. 1 through Fig. 6, according to packaging film of the present utility model, there is top surface 11 and have and rushed hole 12 by what the first side wall the 121, second sidewall the 122, the 3rd sidewall the 123, the 4th sidewall 124 and diapire 125 were formed.Wherein, the arc angling portion 13 (i.e. arc angling portion 13 refers specifically to cambered surface from geometric meaning) of the radius of curvature gradual change extending to top surface 11 from the first side wall 121 along the length direction L of packaging film 1 it is formed with between the first side wall 121 and top surface 11.
According in packaging film of the present utility model, the radius of curvature in whole arc angling portion 13 is gradual change, and arc angling portion 13 is simultaneously tangent with the top surface 11 of the first side wall 121 in punching hole 12 and packaging film, so that can be connected by rounding off between the first side wall 121 and the top surface 11 of packaging film in punching hole 12.Follow-up along fold line 14 folding process, due to an arc angling portion 13 actually arcwall face, degree of crook is little, so packaging film is tight with the battery core (not shown) laminating being placed in punching hole 12 after folding in arc angling portion 13, it is filled in punching hole 12 so that battery core is full, and stress will not be produced concentrate, and then avoid secondary cell in cyclic process, occur because of dilation that afterbody warps phenomenon.
According to packaging film of the present utility model, in one embodiment, seeing figures.1.and.2, arc angling portion 13 is primary importance A from the position that the first side wall 121 extends, and it is second position B that arc angling portion 13 extends to the position of top surface 11.Packaging film 1 has the fold line 14 parallel with the width D of packaging film 1, fold line 14 is between primary importance A and second position B, packaging film 1 folds along fold line 14, so that the partially folded covering of the side being in fold line 14 L along its length of packaging film 1 is in the part of the opposite side being in fold line 14 L along its length of packaging film 1, so that punching hole 12 is capped.
In one embodiment, arc angling portion 13 can be an oval part, and owing to the radius of curvature at each point on oval whole arcwall face is different, therefore the radius of curvature at each point in arc angling portion 13 is different.
In one embodiment, the arc angling portion 13 radius of curvature at second position B can be 6mm～20mm；Preferably, the arc angling portion 13 radius of curvature at second position B can be 6mm～15mm；It is highly preferred that the radius of curvature that arc angling portion 13 is at second position B can be 8mm～10mm.The most not only limit is so, suitably can adjust according to the size of packaging film 1 and punching hole 12.Here remarking additionally, the arc angling portion 13 radius of curvature at second position B should be chosen appropriately, if the radius of curvature at second position B is chosen excessive, then packaging film 1 is when folding along fold line 14, it is impossible to battery core is fully wrapped around；If the radius of curvature at second position B is chosen too small, then the degree of crook in arc angling portion 13 is relatively big, when packaging film 1 folds along fold line 14, is easily generated stress and concentrates.
In one embodiment, the arc angling portion 13 radius of curvature at primary importance A can be 0.4mm～2mm；Preferably, the arc angling portion 13 radius of curvature at primary importance A can be 0.5mm～1.5mm；It is highly preferred that the radius of curvature that arc angling portion 13 is at primary importance A can be 0.8mm～1.2mm.The most not only limit is so, suitably can adjust according to the size of packaging film 1 and punching hole 12.Here remarking additionally, the arc angling portion 13 radius of curvature at primary importance A should be chosen appropriately, if the radius of curvature at primary importance A is chosen excessive, then arc angling portion 13 is too close rushes hole 12, should not position battery core；If the radius of curvature at primary importance A is chosen too small, then packaging film 1 along fold line 14 fold time, be easily generated stress concentrate.
In one embodiment, the thickness of packaging film 1 can be 0.06mm～0.15mm, and the most not only limit so, can the most suitably adjust.
In one embodiment, the degree of depth in punching hole 12 can be 3mm～5mm.
In one embodiment, second position B in arc angling portion 13 and the vertical dimension of the diapire 125 in punching hole 12 are more than 1mm.When second position B in arc angling portion 13 is the least with the vertical dimension of the diapire 125 in punching hole 12, the battery core rushing in hole putting into packaging film 1 is caused to be not easy location.
In one embodiment, packaging film 1 can be aluminum plastic film.Further, the outer layer of aluminum plastic film can be nylon layer or poly terephthalic acid diethanol ester layer, and intermediate layer can be aluminium foil layer, and internal layer can be polypropylene layer.
Secondly explanation is according to the secondary cell of this utility model second aspect.
Use according to the packaging film 1 described in this utility model first aspect according to secondary cell of the present utility model.
In one embodiment, secondary cell can be lithium rechargeable battery, sodium ion secondary battery or zinc ion secondary cell.
Claims (14)
1. a packaging film (1), there is top surface (11) and have and rushed hole (12) by what the first side wall (121), the second sidewall (122), the 3rd sidewall (123), the 4th sidewall (124) and diapire (125) were formed, it is characterized in that, between the first side wall (121) and top surface (11), be formed with the arc angling portion (13) of the radius of curvature gradual change extending to top surface (11) from the first side wall (121) along the length direction (L) of packaging film (1).
Packaging film the most according to claim 1 (1), it is characterised in that
Arc angling portion (13) is primary importance (A) from the position that the first side wall (121) extends, and arc angling portion (13) extend to the position of top surface (11) is the second position (B)；
Packaging film (1) has the fold line (14) parallel with the width of packaging film (1) (D), fold line (14) is positioned between primary importance (A) and the second position (B), packaging film (1) folds along fold line (14), so that the partially folded covering of the side being in fold line (14) (L) along its length of packaging film (1) is in the part being in fold line (14) opposite side of (L) along its length of packaging film (1), so that punching hole (12) is capped.
Packaging film the most according to claim 1 (1), it is characterised in that arc angling portion (13) are an oval part.
Packaging film the most according to claim 1 (1), it is characterised in that
It is the second position (B) that arc angling portion (13) extends to the position of top surface (11)；
The arc angling portion (13) radius of curvature at the second position (B) place is 6mm～20mm.
Packaging film the most according to claim 4 (1), it is characterised in that arc angling portion (13) radius of curvature at the second position (B) place is 6mm～15mm.
Packaging film the most according to claim 5 (1), it is characterised in that arc angling portion (13) radius of curvature at the second position (B) place is 8mm～10mm.
Packaging film the most according to claim 1 (1), it is characterised in that
Arc angling portion (13) is primary importance (A) from the position that the first side wall (121) extends；
The arc angling portion (13) radius of curvature at primary importance (A) place is 0.4mm～2mm.
Packaging film the most according to claim 7 (1), it is characterised in that arc angling portion (13) radius of curvature at primary importance (A) place is 0.5mm～1.5mm.
Packaging film the most according to claim 8 (1), it is characterised in that arc angling portion (13) radius of curvature at primary importance (A) place is 0.8mm～1.2mm.
Packaging film the most according to claim 1 (1), it is characterised in that the degree of depth of punching hole (12) is 3mm～5mm.
11. packaging films according to claim 1 (1), it is characterised in that packaging film (1) is aluminum plastic film or steel plastic film.
12. packaging films according to claim 1 (1), it is characterised in that
Arc angling portion (13) is primary importance (A) from the position that the first side wall (121) extends；
The primary importance (A) in arc angling portion (13) is more than 1mm with the vertical dimension of the diapire (125) of punching hole (12).
13. 1 kinds of secondary cells, it is characterised in that described secondary cell uses the packaging film (1) according to any one of claim 1-12.
14. secondary cells according to claim 13, it is characterised in that secondary cell is lithium rechargeable battery, sodium ion secondary battery or zinc ion secondary cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620101806.4U CN205602398U (en) | 2016-02-01 | 2016-02-01 | Packaging film and secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620101806.4U CN205602398U (en) | 2016-02-01 | 2016-02-01 | Packaging film and secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205602398U true CN205602398U (en) | 2016-09-28 |
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ID=56960244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620101806.4U Active CN205602398U (en) | 2016-02-01 | 2016-02-01 | Packaging film and secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205602398U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188597A (en) * | 2021-11-25 | 2022-03-15 | 宁德新能源科技有限公司 | Electrochemical device, battery module and electric equipment |
| CN116349064A (en) * | 2020-10-06 | 2023-06-27 | 株式会社 Lg新能源 | Soft-pack battery case, molding apparatus thereof, and soft-pack secondary battery |
-
2016
- 2016-02-01 CN CN201620101806.4U patent/CN205602398U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116349064A (en) * | 2020-10-06 | 2023-06-27 | 株式会社 Lg新能源 | Soft-pack battery case, molding apparatus thereof, and soft-pack secondary battery |
| CN114188597A (en) * | 2021-11-25 | 2022-03-15 | 宁德新能源科技有限公司 | Electrochemical device, battery module and electric equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |