CN211605332U - Soft package lithium ion battery's packaging structure - Google Patents
Soft package lithium ion battery's packaging structure Download PDFInfo
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- CN211605332U CN211605332U CN202020418577.5U CN202020418577U CN211605332U CN 211605332 U CN211605332 U CN 211605332U CN 202020418577 U CN202020418577 U CN 202020418577U CN 211605332 U CN211605332 U CN 211605332U
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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
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Abstract
The utility model discloses a soft package lithium ion battery packaging structure, which comprises an angle sealing structure and a folding structure; cutting the four corners of the packaged battery cell along the first corner sealing line and the second corner sealing line to form a corner sealing structure; the second corner seal line is a straight line or an arc line; the folding structure comprises side edges and a filling structure; the side edges of the wrapping and filling structure are fixedly adhered to the battery cell through a protective adhesive tape. The packaging structure of the utility model adopts four types of formed printing lines, thereby reducing the risk that four corners of the battery cell are scratched in the transferring process or the module assembling process; due to the flexible design of the corner seal structure, the module is easy to assemble in the module assembling process, the production beat of module assembling is improved, and the production cost is reduced; under the same electric core width, the minimum 0.2mm can be accomplished to the long round bar diameter, compares ordinary hem mode, under the prerequisite of guaranteeing side structure safety, can practice thrift out 1 ~ 4 mm's electric core body extension width, improves 1% ~ 4.5% electric core capacity, provides more spaces for reducing electric core cost.
Description
Technical Field
The utility model relates to a lithium ion battery makes technical field, especially relates to a soft packet of lithium ion battery's packaging structure.
Background
With the popularization of the new energy automobile market in recent years, the demand of the market for power batteries is higher and higher. At present, common power batteries can be classified into cylindrical batteries, square batteries and soft packages according to forms, wherein the soft packages are formed by taking aluminum plastic films as outer packages.
The enterprise does not do relevant processing to its four corners after accomplishing laminate polymer battery processing usually, appears the risk of four corners gouge or fish tail like this easily in electric core transportation and during the module assembly, appears the weeping phenomenon even. And to a certain extent, reduced the equipment takt time of module, invisibly increased manufacturing cost.
Some enterprises can carry out the hem to the electric core side and handle, because the side hem needs to roll over the side to within 4mm, often can appear equipment and bump electric core body, and then increase the defective rate of product.
Grant publication No. CN207009572U, application No. 201720949813.4, chinese utility model entitled "edge folding and corner sealing structure of soft package battery" with application date of 2017, 08 and 01 discloses a structure for edge folding and corner sealing of soft package battery, wherein, the encapsulation at aluminum-plastic film edge is formed at the four corners of electric core, thereby cutting the corner of the structure for corner sealing to form corresponding bevel edge, and adopting heat sealing process to perform corner sealing at four corners of electric core, as shown in fig. 1 to 2, the dotted line at corner in fig. 1 is corner sealing line 21, heat sealing is performed along the corner sealing line 21, after four corner sealing is completed, the corner is cut along the outside of the corner sealing line 21 to form the bevel edge structure as shown in fig. 2. In addition, the prior art also discloses a folding method, the first folding width is 1.5 mm-4 mm, the second folding is close to the internal folding of the battery cell body, a certain space is saved, and the difficulty of module assembly is further reduced.
However, after careful study, the hemming and corner sealing structure and the hemming method in the prior art still have certain defects, which are as follows:
1. the angle sealing structure only limits one angle sealing mode, namely, inclined sealing, and only limits the included angle between an inclined sealing line and the side face of the tab. The angle sealing mode of sealing to one side has reduced the risk that the four corners was gouged or the fish tail appears easily when the module was assembled to a certain extent, but its angle sealing mode has certain restriction to module structure design. At the application trend of the lightweight of new energy automobile at present, more enterprises use the structure that has special structure more when the module design, and the space of this encapsulation mode at the module end is limited, can not better with the partial special structure phase-match of module.
2. When the inward edge folding is close to the battery cell body according to the edge folding method disclosed in the prior art, the saved space is limited, and the edge folding mechanism easily damages the battery cell, so that the reject ratio of the product is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a special structure's demand when satisfying the module equipment, improve the security of product, promote product structure flexibility, and then reach the production beat that improves the module assembly and fall this soft packet of lithium ion battery's that provides certain space packaging structure for the product.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model discloses a soft packet of lithium ion battery's packaging structure, the outside parcel of electric core of this battery has the plastic-aluminum membrane, and the plastic-aluminum membrane encapsulation electric core forms to packaging structure, and this packaging structure includes:
a corner seal structure;
a flanging structure;
the corner sealing structure is provided with a first corner sealing line and a second corner sealing line;
the first corner seal line is close to a tab of the battery cell and is a straight line extending along the extension direction of the battery cell;
the extending direction of the second corner seal line and the extending direction of the battery cell form a certain angle, and one end, close to the lug, of the second corner seal line is intersected with the first corner seal line;
cutting the four corners of the packaged battery cell along the first corner sealing line and the second corner sealing line to form the corner sealing structure;
the second corner seal line is a straight line or an arc line;
the edge folding structure comprises a side edge formed after the battery cell is packaged and a filling structure embedded in the side edge;
the side edges wrapping the filling structures are fixedly adhered to the battery cell through a protective adhesive tape.
Further, the second corner seal line is a straight line perpendicular to the extending direction of the battery cell, or an inclined line extending from one side of the tab to the center of the battery cell in an inclined manner.
Furthermore, the second corner seal line is an inward concave arc line with an arc-shaped surface facing one side of the tab or an outward convex arc line with an arc-shaped surface facing one side of the center of the battery core.
Furthermore, the encapsulated battery cell is divided into a corner seal side edge part and a corner seal top edge part through the first corner seal line and the second corner seal line;
the length range of the side edge part of the corner seal is 0-20 mm;
the length range of the top edge part of the corner seal is 0-18 mm.
Further, the heat sealing temperature range of the corner sealing structure along the first corner sealing line and the second corner sealing line is 160-198 ℃.
Further, the filling structure of the edge folding structure is a long cylinder with the length not greater than the length of the battery cell body, and the diameter of the filling structure is 0.2-5 mm;
the side edge of the flanging structure is bent and wrapped outside the filling structure, and the upper end of the side edge is configured as a fixed end;
one end of the protective adhesive tape is fixedly adhered to the fixed end, and the other end of the protective adhesive tape is fixedly adhered to the surface of the battery core.
Furthermore, the filling structure is made of neoprene or polypropylene microcellular foaming material, EPE foam, epoxy resin material, PVC plastic or ABS plastic;
the filled structure has a weight of no greater than 2 g.
Further, the temperature range of the side bending and edge ironing is 130-198 ℃.
Further, the thickness range of the protective adhesive tape is 0.03 mm-0.08 mm;
the length of the protective adhesive tape is not less than 20 mm;
the width range of the protective adhesive tape is 6-20 mm.
In the technical scheme, the utility model provides a pair of soft packet of lithium ion battery's packaging structure has following beneficial effect:
the packaging structure of the utility model adopts four types of formed seal lines, and after cutting along the corner seal lines, the risk that four corners of the battery cell are scratched in the transferring process or the module assembling process is reduced to a certain extent; due to the design of the flexible corner sealing structure, the module is easy to assemble in the module assembling process, the production beat of module assembling is further improved, and therefore the production cost is reduced.
The utility model discloses an packaging structure adopts the side turn-up to handle, and technology is more simple relatively, and turn-up inside packing has the filling structure who is long cylinder structure, has increased the ability of preventing colliding with of side, avoids colliding with or extrudeing because of the side and leads to the damaged weeping of side.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a schematic diagram of a prior art corner seal structure;
fig. 2 is a schematic diagram of a cut corner sealing structure in the prior art.
Fig. 3 is a schematic structural diagram of a soft package lithium ion battery package structure according to an embodiment of the present invention when a second corner seal line is an inclined line;
fig. 4 is a schematic structural diagram after cutting when a second corner seal line of the packaging structure of the soft package lithium ion battery provided by the embodiment of the present invention is an inclined line;
fig. 5 is a schematic structural diagram when a second corner seal line of the packaging structure of the soft package lithium ion battery provided by the embodiment of the present invention is a straight line perpendicular to an extending direction of the battery cell;
fig. 6 is a schematic structural diagram after cutting when a second corner seal line of the packaging structure of the soft package lithium ion battery provided by the embodiment of the present invention is a straight line perpendicular to an extending direction of the battery cell;
fig. 7 is a schematic structural diagram of a soft package lithium ion battery according to an embodiment of the present invention, where a second corner sealing line of the package structure is an inward concave arc line;
fig. 8 is a schematic structural diagram after cutting when a second corner sealing line of the packaging structure of the soft package lithium ion battery provided by the embodiment of the present invention is an inward concave arc line;
fig. 9 is a schematic structural diagram of a soft package lithium ion battery according to an embodiment of the present invention, where a second corner sealing line of the package structure is an outward convex arc line;
fig. 10 is a schematic structural diagram after cutting when a second corner sealing line of the packaging structure of the soft package lithium ion battery provided by the embodiment of the present invention is an outward convex arc line;
fig. 11 is a first schematic structural diagram of a folded edge structure of an encapsulation structure of a soft package lithium ion battery provided by an embodiment of the present invention;
fig. 12 is a schematic structural diagram ii of a folded edge structure of an encapsulation structure of a soft package lithium ion battery provided by the embodiment of the present invention.
Description of reference numerals:
1. an electric core; 2. a tab;
100. a second corner seal line; 200. a first corner seal line; 300. corner sealing side edge portions; 400. a corner seal top edge portion; 500. filling the structure; 600. a side edge; 700. and (4) protecting the adhesive tape.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
See FIGS. 3-10 for further illustration;
the utility model discloses a soft packet of lithium ion battery's packaging structure, 1 outside parcel of electric core of this battery has the plastic-aluminum membrane, and the plastic-aluminum membrane encapsulation electric core 1 forms to packaging structure, and this packaging structure includes:
a corner seal structure;
a flanging structure;
the corner seal structure has a first corner seal line 200 and a second corner seal line 100;
the first corner seal line 200 is close to the tab 2 of the battery cell 1, and the first corner seal line 200 is a straight line extending along the extending direction of the battery cell 1;
the extending direction of the second corner sealing line 100 forms a certain angle with the extending direction of the battery cell 1, and one end of the second corner sealing line 100, which is close to the tab 2, is intersected with the first corner sealing line 200;
cutting four corners of the packaged battery cell 1 along the first corner sealing line 200 and the second corner sealing line 100 to form a corner sealing structure;
the second corner seal line 100 is a straight line or an arc line;
the flanging structure comprises a side edge formed after the battery cell 1 is packaged and a filling structure 500 embedded in the side edge;
the side edge of the packing and filling structure 500 is fixed to the battery cell 1 by the protective tape 700.
Specifically, this embodiment discloses an angle seal structure and hem structure of encapsulation electric core 1, soft package lithium ion battery adds man-hour in production, and 1 outside covers/wraps up of electric core of battery has the plastic-aluminum membrane, and forms into packaging structure behind the plastic-aluminum membrane encapsulation electric core 1, and packaging structure is located the four corners of utmost point ear 2 one side of electric core 1, forms into foretell angle seal structure after the processing, forms into foretell hem structure after the structure processing of electric core 1 both sides. The difference from the prior art is that the second corner seal line 100 is a straight line or an arc line, and defines the size of an area divided by the second corner seal line 100 and the first corner seal line 200, and after heat sealing along the corner seal lines, the corner seal structure is cut to form the corner seal structure. In the hem structure of the present embodiment, the filling structure 500 is filled inside the side 600, and the side is fixed by the protective tape 700 to form the hem structure. The second corner sealing line 100 of the corner sealing structure of the present embodiment has various dividing forms, so that the corner sealing structure is flexible and changeable, and is suitable for the process requirements of module assembly.
Preferably, the second corner seal line 100 in this embodiment is a straight line perpendicular to the extending direction of the battery cell 1, or an inclined line extending from the tab 2 side toward the center of the battery cell 1. The embodiment specifically introduces the dividing manner when the second corner seal line 100 is a straight line, where the straight line is divided into two types, one type is a perpendicular line perpendicular to the extending direction of the battery cell 1, and the other type is an inclined line forming a certain angle with the extending direction of the battery cell 1, and the range of the inclined angle can be designed according to actual requirements. Meanwhile, the inclination angle of the inclined line can be properly adjusted according to the size range divided by the corner seal top edge part 400 of the corner seal structure.
Preferably, the second corner seal line 100 in this embodiment is a concave arc line with an arc surface facing one side of the tab 2, or a convex arc line with an arc surface facing one side of the center of the battery cell 1. This embodiment specifically describes the dividing manner when the second corner seal line 100 is an arc line, and the arc line is divided into two types, one type is a concave arc line in which the arc surface of the arc line faces the outside, and the other type is a convex arc line in which the arc surface of the arc line faces the inside. Similarly to the case where the second corner seal line 100 is a straight line, the division range of the second corner seal line 100 in the case of an arc may be adjusted as appropriate according to the process requirements and the size range of the corner seal top edge portion 400.
Preferably, the encapsulated battery cell 1 is divided into a corner-sealed side edge portion 300 and a corner-sealed top edge portion 400 by a first corner-sealed line 200 and a second corner-sealed line 100;
the length of the corner seal side part 300 ranges from 0mm to 20 mm;
the length of the corner seal top edge portion 400 is in the range of 0-18 mm.
Preferably, the heat sealing temperature of the corner seal structure along the first corner seal line 200 and the second corner seal line 100 is in the range of 160 ℃ to 198 ℃.
The size scope that the angle seal structure was divided has specifically been introduced to this embodiment, and it can be suitably adjusted according to the technological requirement of actual production processing, simultaneously, still further has injectd the heat-seal parameter, guarantees to satisfy the requirement of this application after the first angle seal line 200 and the heat-seal of second angle seal line 100 that this embodiment discloses and cut, makes things convenient for follow-up module assembly.
See FIGS. 11-12;
preferably, the filling structure 500 of the flanging structure is a long cylinder with a length not greater than that of the battery cell 1, and the diameter of the filling structure 500 is 0.2 mm-5 mm;
the side 600 of the hemming structure is bent to wrap the outside of the filling structure 500, and the upper end of the side 600 is configured as a fixed end;
one end of the protective tape 700 is fixedly adhered to the fixed end, and the other end of the protective tape 700 is fixedly adhered to the surface of the battery cell 1.
The present embodiment specifically describes a specific structure of the hemming structure, which performs bending and hemming on the side 600 by means of hemming process, and the internal space formed by hemming is filled with the filling structure 500, and since the space formed by hemming is a cylindrical structure, the filling structure 500 of the present embodiment is mainly a long cylindrical structure. After the crimping and filling, the side edge 600 and the battery cell 1 are adhered and fixed by using the protective tape 700.
Preferably, the material of the filling structure 500 in this embodiment is neoprene or polypropylene microcellular foam material, EPE foam, epoxy resin material, PVC plastic, or ABS plastic;
the weight of the filling structure 500 is not more than 2 g.
The temperature range of the side 600 for bending and ironing is 130-198 ℃.
The thickness range of the protective adhesive tape 700 is 0.03 mm-0.08 mm;
the length of the protective tape 700 is not less than 20 mm;
the width of the protective tape 700 is 6mm to 20 mm.
In the technical scheme, the utility model provides a pair of soft packet of lithium ion battery's packaging structure has following beneficial effect:
the packaging structure of the utility model adopts four types of formed seal lines, and after cutting along the corner seal lines, the risk that four corners of the battery cell 1 are scratched in the transferring process or the module assembling process is reduced to a certain extent; due to the design of the flexible corner sealing structure, the module is easy to assemble in the module assembling process, the production beat of module assembling is further improved, and therefore the production cost is reduced.
The utility model discloses an encapsulation structure adopts side 600 turn-up to handle, and the technology is more simple relatively, and turn-up inside packing has the filling structure 500 that is long cylinder structure, has increased the ability of colliding with of preventing of side 600, avoids colliding with or extrudeing because of side 600 and leads to the damaged weeping of side 600.
In general, when the cell 1 is folded, a gap of at least 2mm needs to be formed on the side 600 of the cell to ensure that the baffle of the folding mechanism is inserted into the gap for folding. Because the thickness of the baffle plate of the common edge folding mechanism is more than or equal to 2mm, if the thickness of the baffle plate is less than 2mm, the side 600 of the battery cell 1 is scratched greatly, and then the risk of liquid leakage and even short circuit of the battery cell 1 is caused. The utility model discloses the diameter of using filling structure 500 that mentions is 0.2mm ~ 5mm, and equipment can be needn't use the baffle to carry out the hem, only need on the diameter basis that is greater than long cylinder, with the side 600 buckle into circular-arc can. Particularly, the diameter of the filling structure 500 determines the extendable range of the width of the battery cell 1, and under the same width, the diameter of the filling structure 500 can be 0.2mm at the minimum, so that the extending width of the battery cell 1 of 1-4 mm can be saved compared with the common edge folding mode, thereby improving the battery cell capacity by 1% -4.5%, and providing more space for reducing the cost of the battery cell 1.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (9)
1. The utility model provides a soft packet of lithium ion battery's packaging structure, the outside parcel of electric core (1) of this battery has the plastic-aluminum membrane, and the plastic-aluminum membrane encapsulation electric core forms into packaging structure, its characterized in that, this packaging structure includes:
a corner seal structure;
a flanging structure;
the corner seal structure has a first corner seal line (200) and a second corner seal line (100);
the first corner seal line (200) is close to a tab (2) of the battery cell (1), and the first corner seal line (200) is a straight line extending along the extending direction of the battery cell (1);
the extending direction of the second corner seal line (100) forms a certain angle with the extending direction of the battery core (1), and one end, close to the lug (2), of the second corner seal line (100) is intersected with the first corner seal line (200);
cutting four corners of the packaged battery cell (1) along the first corner sealing line (200) and the second corner sealing line (100) to form the corner sealing structure;
the second corner seal line (100) is a straight line or an arc line;
the flanging structure comprises a side edge (600) formed after the battery cell (1) is packaged and a filling structure (500) embedded into the side edge (600);
the side edge (600) wrapping the filling structure (500) is fixedly adhered to the battery cell (1) through a protective adhesive tape (700).
2. The packaging structure of the soft package lithium ion battery according to claim 1, wherein the second corner seal line (100) is a straight line perpendicular to the extending direction of the battery cell (1) or an inclined line extending from one side of the tab (2) toward the center of the battery cell (1).
3. The packaging structure of the soft package lithium ion battery according to claim 1, wherein the second corner seal line (100) is a concave arc with an arc surface facing one side of the tab (2) or a convex arc with an arc surface facing one side of the center of the battery cell (1).
4. The packaging structure of the soft package lithium ion battery according to claim 1, wherein the packaged battery cell (1) is divided into a corner seal side edge part (300) and a corner seal top edge part (400) by the first corner seal line (200) and the second corner seal line (100);
the length range of the corner seal side edge part (300) is 0-20 mm;
the length of the corner seal top edge part (400) ranges from 0mm to 18 mm.
5. The packaging structure of the soft package lithium ion battery according to claim 4, wherein the heat sealing temperature of the corner sealing structure along the first corner sealing line (200) and the second corner sealing line (100) is in a range of 160 ℃ to 198 ℃.
6. The packaging structure of the soft package lithium ion battery is characterized in that the filling structure (500) of the flanging structure is a long cylinder with the length not greater than that of the battery cell (1), and the diameter of the filling structure (500) is 0.2 mm-5 mm;
the side edge (600) of the edge folding structure is bent and wrapped outside the filling structure (500), and the upper end of the side edge (600) is configured as a fixed end;
one end of the protective adhesive tape (700) is fixedly adhered to the fixed end, and the other end of the protective adhesive tape (700) is fixedly adhered to the surface of the battery cell (1).
7. The packaging structure of the soft package lithium ion battery according to claim 6, wherein the filling structure (500) is made of neoprene or polypropylene microcellular foam material, EPE foam or epoxy resin material, PVC plastic or ABS plastic;
the filling structure (500) has a weight of not more than 2 g.
8. The packaging structure of the soft package lithium ion battery according to claim 6, wherein the temperature range of the bent and hot edge of the side edge (600) is 130-198 ℃.
9. The packaging structure of the soft package lithium ion battery according to claim 6, wherein the thickness of the protective tape (700) is in the range of 0.03mm to 0.08 mm;
the length of the protective adhesive tape (700) is not less than 20 mm;
the width range of the protective adhesive tape (700) is 6-20 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510242A (en) * | 2020-11-30 | 2021-03-16 | 东莞新能德科技有限公司 | Secondary battery and terminal device |
| CN114614169A (en) * | 2022-03-30 | 2022-06-10 | 东莞新能源科技有限公司 | Electrochemical device, preparation method thereof and electronic device |
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2020
- 2020-03-27 CN CN202020418577.5U patent/CN211605332U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510242A (en) * | 2020-11-30 | 2021-03-16 | 东莞新能德科技有限公司 | Secondary battery and terminal device |
| CN112510242B (en) * | 2020-11-30 | 2022-04-12 | 东莞新能德科技有限公司 | Secondary battery and terminal device |
| CN114614169A (en) * | 2022-03-30 | 2022-06-10 | 东莞新能源科技有限公司 | Electrochemical device, preparation method thereof and electronic device |
| CN114614169B (en) * | 2022-03-30 | 2023-09-19 | 东莞新能源科技有限公司 | Electrochemical device, preparation method thereof and electronic device |
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