CN214313347U - Energy density promotes soft-packaged electric core - Google Patents
Energy density promotes soft-packaged electric core Download PDFInfo
- Publication number
- CN214313347U CN214313347U CN202120635914.0U CN202120635914U CN214313347U CN 214313347 U CN214313347 U CN 214313347U CN 202120635914 U CN202120635914 U CN 202120635914U CN 214313347 U CN214313347 U CN 214313347U
- Authority
- CN
- China
- Prior art keywords
- edge
- electric core
- energy density
- banding
- soft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses an energy density lifting soft-packaged cell, which is provided with two side edge seals and a top edge seal, wherein the inner layer of the top edge seal is clamped with a lug; two side banding and a top banding surpass outside the electric core internal body respectively, and two side banding turn over the side of rolling over the laminating at the electric core internal body, the top banding turns over the topside of rolling over the laminating at the electric core internal body, and the utmost point ear takes place to turn over in step, consequently need buckle utmost point ear alone again, makes its direction up, in order to avoid utmost point ear and the metal level of outer envelope to switch on and form electronic channel, sets up the insulating layer at the edge of top banding, even the utmost point ear is buckled and is also can not electrically conduct with the edge contact of top banding. The utility model discloses except making the plastic-aluminum membrane hug closely the electric core endosome on width direction, hug closely the electric core endosome in top banding department, consequently reduced the invalid space of outer covering membrane topside position, under the same overall dimension, make the electric core endosome have longer length to promote the energy density of electric core.
Description
Technical Field
The utility model relates to a battery encapsulation technical field further relates to an energy density promotes soft-packaged electrical core.
Background
The lithium ion battery cell is packaged by adopting an aluminum-plastic film, the aluminum-plastic film consists of an outer nylon layer, a middle aluminum foil layer and an inner polypropylene layer, and the inner body of the battery cell is filled into the aluminum-plastic film subjected to pit punching treatment and is prepared by bonding and hot-pressing treatment by using a binder. For square lithium ion battery cell, all adopt the mode of rolling over the side banding to reduce electric core width, reduced the size that the plastic-aluminum membrane extends to both sides, reduce the width of electric core both sides, promoted electric core energy density.
The top end of the lithium ion battery cell is provided with a tab, the edge of the top end of the conventional battery cell structure is not bent, otherwise, the tab and the aluminum-plastic film are easily short-circuited; the aluminum-plastic film occupies a certain space in the length direction, so that the length of the cell body part is compressed, and the energy density of the cell is limited.
For those skilled in the art, how to further increase the energy density of the battery cell is a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides an energy density promotes soft-packaged electrical core turns over a processing through turning over the limit with pushing up, shortens the appearance length of soft-packaged electrical core, reduces occuping of invalid space, promotes the energy density of electric core, and concrete scheme is as follows:
a soft-packaged battery cell with improved energy density comprises an outer packaging film which is folded, covered and wrapped on the surface of an inner body of the battery cell, wherein the outer packaging film is provided with two side sealing edges and a top sealing edge, and an electrode lug is clamped in the inner layer of the top sealing edge;
an insulating layer is arranged at the edge of the top sealed edge;
the two side sealing edges are folded and attached to the side edges of the battery cell inner body, and the top sealing edge is folded and attached to the top edge of the battery cell inner body.
Optionally, the folded top edge sealing edge is covered with a top edge sticking insulating tape.
Optionally, the folded side edge sealing part is covered with a side edge adhesive tape.
Optionally, the top end of the side insulating tape is flush with the top end of the cell inner body.
Optionally, the insulating layer is a coated insulating glue.
Optionally, two ends of the top sealed edge in the length direction are respectively provided with a folded angle folded inwards.
Optionally, the break angle is bent towards the inner side surface.
Optionally, the width of the top sealing edge is smaller than the thickness of the cell inner body.
The utility model provides an energy density lifting soft-packaged cell, which comprises an outer coating film which is folded to cover and wrap the surface of the inner body of the cell, wherein the whole soft-packaged cell is provided with two side edge seals and a top edge seal, and an electrode lug is clamped on the inner layer of the top edge seal; two side banding and a top banding surpass outside the electric core internal body respectively, and two side banding turn over the side of rolling over the laminating at the electric core internal body, the top banding turns over the topside of rolling over the laminating at the electric core internal body, and the utmost point ear takes place to turn over in step, consequently need buckle utmost point ear alone again, makes its direction up, in order to avoid utmost point ear and the metal level of outer envelope to switch on and form electronic channel, sets up the insulating layer at the edge of top banding, even the utmost point ear is buckled and is also can not electrically conduct with the edge contact of top banding. The utility model discloses except making the plastic-aluminum membrane hug closely the electric core endosome on width direction, hug closely the electric core endosome in top banding department, consequently reduced the invalid space of outer covering membrane topside position, under the same overall dimension, make the electric core endosome have longer length to promote the energy density of electric core.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1A and 1B are a front view and a top view of a packaged soft-package battery cell, respectively;
fig. 2A and fig. 2B are a front view and a top view of the energy density-enhanced soft-packaged battery cell after the side edge sealing is folded;
FIGS. 3A and 3B are front and top views, respectively, of the top edge seal with both ends folded to form a fold angle;
fig. 4A and fig. 4B are respectively the utility model discloses an energy density promotes soft-packaged electrical core machine-shaping's elevation and top view.
The figure includes:
side banding 1, top banding 2, dog-ear 21, insulating layer 3, utmost point ear 4.
Detailed Description
The utility model discloses a core lies in providing an energy density promotes soft-packaged electrical core, turns over a processing through turning over the top banding, shortens the appearance length of soft-packaged electrical core, reduces occuping of invalid space, promotes the energy density of electric core.
In order to make those skilled in the art better understand the technical solution of the present invention, the following will describe the energy density lifting soft-package battery cell in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides an energy density promotes soft-packaged electrical core, cover the outer involucrum that the parcel set up at electric core endosome surface including the fifty percent discount, outer involucrum is the plastic-aluminum membrane usually, and the plastic-aluminum membrane includes three layer construction, outer nylon layer, middle level aluminium foil layer and inlayer polypropylene layer, the inlayer polypropylene layer mutual contact of two-layer plastic-aluminum membrane, and two heads heat and exert pressure to the plastic-aluminum membrane in the encapsulation, make inlayer polypropylene layer melt and fix as an organic whole, accomplish the sealed encapsulation of two-layer plastic-aluminum membrane.
Fig. 1A and 1B are a front view and a top view of a packaged soft-package battery cell, respectively; a soft package battery cell is formed by packaging a complete aluminum-plastic film, a pit is formed by punching the aluminum-plastic film, the battery cell inner body is arranged in the pit, the aluminum-plastic film is folded to completely wrap the battery cell inner body, two sides of the battery cell inner body are sealed and packaged firstly, one side is left to be filled with electrolyte, the remaining side is sealed and packaged after the electrolyte is filled, the structure shown in figure 1A is formed, at the moment, the outer packaging film is provided with two side sealing edges 1 and a top sealing edge 2, a tab 4 is clamped in the inner layer of the top sealing edge 2, the tab 4 is positioned at the position of the top sealing edge 2, which is overlapped with the two layers of aluminum-plastic films, and is clamped and fixed by the two layers of aluminum-plastic films, and tab glue is arranged between the tab 4 and the aluminum-plastic films.
The edge of the top edge sealing 2 is provided with an insulating layer 3, and as shown in fig. 1A, the insulating layer 3 is located at the upper edge of the top edge sealing 2, that is, the part of the cross section contacting with the outside, and the insulating layer 3 plays an insulating role.
Two side banding 1 turn over a side of laminating at the electric core endosome, and top banding 2 turns over a topside of laminating at the electric core endosome, because top banding 2 department is provided with utmost point ear 4, and utmost point ear 4 turns over along with top banding 2 synchronous book, and the orientation of the utmost point ear 4 that turns over after 2 synchronous book of top banding is perpendicular with the surface of electric core endosome, consequently still need turn over utmost point ear 4 alone reverse book again, makes the orientation of utmost point ear 4 and the surface of electric core endosome parallel.
The utility model discloses except making outer tunica adventitia hug closely the electric core endosome on width direction, hug closely the electric core endosome in 2 departments of top banding, consequently reduced the invalid space of outer tunica adventitia topside position, under the same overall dimension, make the electric core endosome have longer length to promote the energy density of electric core.
On the basis of the above scheme, the utility model discloses turn over 2 departments of top banding after rolling over and cover and paste topside insulating tape, topside insulating tape pastes simultaneously in outer envelope part and the top banding 2 that electric core endosome corresponds, prevents 2 rebound of top banding, strengthens fixed effect. Besides the insulating tape, the insulating tape is also fixed by gluing.
Similarly, the folded side edge seals 1 are covered with and adhered with side insulating adhesive tapes, and the side insulating adhesive tapes are adhered to the outer packaging film part and the side edge seals 1 corresponding to the inner body of the battery cell at the same time, so that the side edge seals 1 are prevented from rebounding, and the fixing effect is enhanced. The side sealing edge 1 can also be fixed by glue.
Specifically, the top of side insulating tape flushes with the top of electric core endosome, because the needs that side banding 1 top is higher than electric core endosome part turn over and roll over, consequently need not be fixed relatively with electric core endosome.
Preferably, the insulating layer 3 is a coated insulating glue, the insulating glue covers the section of the top edge seal 2 exposed to the outside, and the insulating cover is an aluminum foil layer of the middle layer capable of conducting electricity of the aluminum-plastic film, so that the electricity conduction can not occur when the tab 4 is finally turned over reversely and contacts with the section; therefore, the insulating layer 3 is mainly coated on the position corresponding to the tab 4, and other positions of the top edge sealing 2 may be coated or not coated.
On the basis of above-mentioned arbitrary technical scheme and intercombination, the utility model discloses set up the dog-ear 21 of inside fifty percent discount respectively at top banding 2 length direction's both ends, turn over a formation dog-ear 21 back to top banding 2's both ends, shortened top banding 2 length direction's size, make things convenient for subsequent the operation of turning over a book.
The bevel 21 is bent towards the inner side surface, the inner side surface is a surface which is in contact with the side edge of the inner body of the battery cell after the top sealing edge 2 is turned over, and the bevel 21 is pressed below after the top sealing edge 2 is turned over, so that the bevel 21 is prevented from rebounding.
Specifically, the width of the top seal edge 2 is smaller than the thickness of the cell inner body, that is, after the top seal edge 2 is flipped, the edge of the top seal edge does not exceed the cell inner body.
The following processing procedure that combines the figure to be right the utility model discloses an energy density promotes soft-packaged electric core explains:
referring to fig. 1A and 1B, after being sealed and packaged, three side edges of the outer wrapping film form two side sealing edges 1 and one top sealing edge 2, where the two side sealing edges 1 and the one top sealing edge 2 both exceed the edge of the inner body of the battery cell, and a rounded rectangle a in the drawings represents the inner body of the battery cell; at this time, the area occupied by the outer coating film is larger than the area of the cell inner body, as shown in fig. 1B, the side seal edges 1 of which two sides exceed the parts are respectively turned over by about 90 degrees towards the cell inner body a along the direction indicated by the curved arrow in the figure, so that the side seal edges 1 are attached to the side edges of the cell inner body, and the side seal edges 1 are fixed relative to the side edges of the cell inner body, thereby forming the structure as shown in fig. 2B, and at this time, the two side seal edges 1 and one top seal edge 2 are in a U-shaped structure when viewed from the top.
Fig. 2A and fig. 2B are a front view and a top view of the side-sealed edge 1 after being folded to improve the energy density of the soft-packaged battery cell; at this moment, the side seal edge 1 is tightly attached to the side edge of the battery cell inner body, and the top seal edge 2 is still beyond the top edge of the battery cell inner body without being turned over. The two ends of the top seal edge 2 are folded along the directions shown by two opposite arrows in fig. 2A to form the structure shown in fig. 3A, and the top corner parts at the two ends of the top seal edge 2 are attached to the main body part of the top seal edge 2, so that the subsequent operation is facilitated.
As shown in fig. 3A and 3B, which are respectively a front view and a top view of the two ends of the top edge 2 folded to form the folded angle 21; and (3) folding along a dotted line on the basis of fig. 3A, wherein the folding direction is about 90 degrees from back to front as indicated by a bending arrow, so that the top edge seal 2 is tightly attached to the top edge of the cell main body, thereby forming the structure diagram shown in fig. 4A.
As shown in fig. 4A and fig. 4B, which are a front view and a top view of the energy density enhanced soft package battery core of the present invention; at the moment, two side seal edges 1 and one top seal edge 2 are tightly attached to the edge of the cell main body; the tab 4 is turned over synchronously along with the top sealed edge 2, so that the orientation is also turned over by 90 degrees, and at the moment, the tab 4 needs to be turned over reversely again, so that the tab 4 is parallel to the surface of the battery cell main body again.
The overall dimension of whole laminate polymer core is unanimous basically with the appearance of electric core main part, and on length direction (also be the upper and lower direction in fig. 4A), outer envelope no longer occupies extra space, under the same condition of overall dimension of laminate polymer core, can promote the size of electric core endosome to promote the energy density of whole laminate polymer core.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The energy density improving soft package battery cell is characterized by comprising an outer packaging film which is folded, covered and wrapped on the surface of an inner body of the battery cell, wherein the outer packaging film is provided with two side sealing edges (1) and a top sealing edge (2), and an electrode lug (4) is clamped in the inner layer of the top sealing edge (2);
an insulating layer (3) is arranged at the edge of the top sealing edge (2);
two the side banding (1) turns over to roll over the laminating and is in the side of electric core endosome, top banding (2) turns over to roll over the laminating and is in the topside of electric core endosome.
2. The energy density-improving soft-packaged cell according to claim 1, wherein a top edge insulating tape is stuck at the folded top edge sealing (2) in a covering manner.
3. The energy density-improving soft-packaged battery cell according to claim 1, wherein the folded side edge sealing edges (1) are covered with and adhered with side insulating tapes.
4. The energy density boost soft-pack cell of claim 3, wherein the top end of said side insulating tape is flush with the top end of said cell inner body.
5. The energy density lifting soft-package battery cell according to claim 1, characterized in that the insulating layer (3) is a coated insulating glue.
6. The energy density lifting soft-package battery cell according to any one of claims 1 to 5, wherein the two ends of the top sealed edge (2) in the length direction are respectively provided with a folded angle (21) folded inwards.
7. The energy density boost soft-pack cell according to claim 6, characterized in that the break angle (21) is bent towards the inner side.
8. The energy density boost soft-packing cell of claim 6, characterized in that the width of the top edge seal (2) is less than the thickness of the cell inner body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635914.0U CN214313347U (en) | 2021-03-29 | 2021-03-29 | Energy density promotes soft-packaged electric core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120635914.0U CN214313347U (en) | 2021-03-29 | 2021-03-29 | Energy density promotes soft-packaged electric core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214313347U true CN214313347U (en) | 2021-09-28 |
Family
ID=77837564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120635914.0U Active CN214313347U (en) | 2021-03-29 | 2021-03-29 | Energy density promotes soft-packaged electric core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214313347U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709529A (en) * | 2022-03-04 | 2022-07-05 | 重庆市紫建电子股份有限公司 | Secondary angle folding device and angle folding method for head of soft-package battery cell |
| WO2023185200A1 (en) * | 2022-03-30 | 2023-10-05 | 东莞新能源科技有限公司 | Electrochemical device, preparation method therefor, and electronic device |
| CN114709529B (en) * | 2022-03-04 | 2024-05-24 | 重庆市紫建电子股份有限公司 | Secondary corner folding device for head of soft-package battery cell and corner folding method thereof |
-
2021
- 2021-03-29 CN CN202120635914.0U patent/CN214313347U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709529A (en) * | 2022-03-04 | 2022-07-05 | 重庆市紫建电子股份有限公司 | Secondary angle folding device and angle folding method for head of soft-package battery cell |
| CN114709529B (en) * | 2022-03-04 | 2024-05-24 | 重庆市紫建电子股份有限公司 | Secondary corner folding device for head of soft-package battery cell and corner folding method thereof |
| WO2023185200A1 (en) * | 2022-03-30 | 2023-10-05 | 东莞新能源科技有限公司 | Electrochemical device, preparation method therefor, and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110808377B (en) | Battery cell, battery and electronic equipment | |
| CN206250224U (en) | Battery core encapsulating structure | |
| CN206619617U (en) | Soft-package battery | |
| CN108615924B (en) | Battery cell and lithium ion battery adopting battery cell | |
| JP5142570B2 (en) | Laminated battery and manufacturing method thereof | |
| CN101118976A (en) | Method for manufacturing soft packed lithium ion battery | |
| CN214313347U (en) | Energy density promotes soft-packaged electric core | |
| CN113675535B (en) | Battery cell and electronic device | |
| JP2004515879A (en) | Lithium ion battery and / or lithium ion polymer battery with shielded leads | |
| CN109273776B (en) | Battery cell film bag packaging method, battery preparation method and battery | |
| CN111837253B (en) | Battery cell packaging structure | |
| CN211764018U (en) | Aluminum plastic film and soft package battery | |
| CN108428814B (en) | Packaging film and soft package battery | |
| CN108428813A (en) | Soft-package battery | |
| CN108428809A (en) | Soft-package battery | |
| CN108428812B (en) | Packaging shell and laminate polymer battery | |
| CN108574058B (en) | Soft package battery | |
| CN217468540U (en) | Soft package lithium ion battery and electronic device | |
| CN219226322U (en) | Battery pole piece | |
| CN218242200U (en) | Insulating film and single battery | |
| CN206422169U (en) | Battery core encapsulating structure | |
| CN111684617B (en) | Battery cell | |
| CN218448175U (en) | Tab, battery core and battery | |
| JP3743610B2 (en) | battery | |
| CN108428810B (en) | Packaging film and soft package battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |