CN212342769U - Soft-package battery top sealing structure - Google Patents
Soft-package battery top sealing structure Download PDFInfo
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- CN212342769U CN212342769U CN202021249632.9U CN202021249632U CN212342769U CN 212342769 U CN212342769 U CN 212342769U CN 202021249632 U CN202021249632 U CN 202021249632U CN 212342769 U CN212342769 U CN 212342769U
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- tab
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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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Abstract
The utility model provides a laminate polymer battery top seals structure, including electric core, install utmost point ear on electric core and the plastic-aluminum membrane of parcel electric core, utmost point ear includes the strap that links to each other with electric core and wraps up the at least twice utmost point ear glue on the strap, and the plastic-aluminum membrane is stretched out to the one end of strap, and each way utmost point ear glue links to each other with the internal surface heat-seal of plastic-aluminum membrane, and arbitrary adjacent twice utmost point ear glue interval sets up on the strap, is equipped with the imbibition strip between the adjacent twice utmost point ear glue on the strap. The utility model provides a soft package battery top sealing structure, which can increase the connection firmness of a metal belt and an aluminum plastic film, so as to reduce the probability of liquid leakage caused by the layered stripping of tab glue; and electrolyte leaked from the tab glue can be absorbed through the liquid absorbing strip, so that the leakage of the battery can be better prevented.
Description
Technical Field
The utility model belongs to the technical field of the battery, more specifically say, relate to a laminate polymer battery top seal structure.
Background
The tab is a component of a soft package battery product and is a metal conductor for leading out the positive electrode and the negative electrode from the battery core. The tab is generally formed by compounding a tab adhesive and a metal belt. The tab glue mainly comprises black glue, yellow glue and white glue; the black glue is characterized in that a PEN film (polyethylene naphthalate, PEN for short) is used as a middle functional layer, and modified PPA (polyphthalamide, PPA for short) is used as two layers on the surface of the black glue; the yellow glue is characterized in that the middle functional layer is a non-woven fiber layer, and the two layers on the surface are modified PPA. The surface layers and the middle functional layers of the black glue and the yellow glue are all compounded by different substances, and the black glue and the yellow glue can be delaminated after being soaked in electrolyte. The white glue is prepared by co-extruding three layers of PP (polypropylene) materials with different functions, the heat sealing temperature of the functional layer is wider than 165-167 ℃, and is slightly lower than the battery packaging temperature by 180-220 ℃, so that the problem of section short circuit can be effectively prevented, the temperature range of operability during battery packaging is enlarged, and the yield of battery production is improved. However, white glue costs more than black and yellow glue, which are commonly used in some low and medium end batteries. However, as the battery using the black glue and the yellow glue is used for a long time, the tab glue is easy to delaminate and peel, which causes the leakage of the battery.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a laminate polymer battery top seals structure to laminate polymer battery along with live time increase that exists among the solution correlation technique, its utmost point ear is glued and is easily appeared the layering and peel off, leads to the problem of battery weeping.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions: the utility model provides a laminate polymer battery top seals structure, including electric core, install the utmost point ear on electric core and the plastic-aluminum membrane of parcel electric core, utmost point ear includes the strap that links to each other with electric core and wraps up the at least twice utmost point ear glue on the strap, and the plastic-aluminum membrane is stretched out to the one end of strap, and each way utmost point ear glue links to each other with the internal surface heat-seal of plastic-aluminum membrane, and arbitrary adjacent twice utmost point ear glue interval sets up on the strap, is equipped with the imbibition strip on the strap between the adjacent twice utmost point ear glue.
By adopting the technical scheme, the connection firmness of the metal belt and the aluminum plastic film can be improved, so that the probability of liquid leakage caused by the delamination and stripping of the tab glue is reduced; and electrolyte leaked from the tab glue can be absorbed through the liquid absorbing strips so as to better prevent the electrolyte from leaking.
In an optional embodiment, the inner surface of the aluminum-plastic film is provided with an insulating layer, and the material of one tab glue close to the battery core is the same as that of the insulating layer.
By adopting the technical scheme, the aluminum plastic film can be more tightly and firmly bonded with the tab glue close to the battery cell, and the leakage probability between the aluminum plastic film and the tab glue is reduced.
In an optional embodiment, the insulating layer is a cast polypropylene layer, and a material of one tab adhesive close to the battery cell is a modified polypropylene material or a cast polypropylene material.
By adopting the technical scheme, the good insulation property of the inner surface of the aluminum-plastic film can be ensured, and meanwhile, the aluminum-plastic film can be tightly and firmly bonded with the tab glue close to the battery cell.
In an alternative embodiment, one tab glue adjacent to the cell is a single layer glue.
By adopting the technical scheme, the cost can be reduced, the problem of delamination and peeling of one tab adhesive close to the battery cell can be avoided, and the leakage of the tab adhesive can be better prevented.
In an alternative embodiment, the absorbent strip is a foam, cotton or sponge. The system can be selected for use according to the needs of users so as to meet the requirements of different users and optimize the cost.
In an alternative embodiment, the aluminum-plastic film is provided with a containing groove for containing the absorbent strip.
Through adopting above-mentioned technical scheme, installation and holding imbibition strip that can be better, the fixed of the imbibition strip of being convenient for, the imbibition strip of also being convenient for absorbs the electrolyte of seepage.
In an alternative embodiment, in two adjacent tab glues on the metal strip: the length of one tab glue close to the battery core is greater than that of the other tab glue.
By adopting the technical scheme, the connection strength of the tab glue and the aluminum plastic film is weakened by the outward electric core in sequence, so that the tab glue close to one end of the electric core is bonded with the aluminum plastic film more firmly, and the leakage is better prevented.
In an alternative embodiment, along the length direction of the metal strip, the projection of each tab glue at the position adjacent to the absorbent bar is positioned on the area covered by the absorbent bar.
Through adopting above-mentioned technical scheme, can make the better electrolyte that oozes from utmost point ear glue of absorption strip to avoid the electrolyte seepage.
In an optional embodiment, two tabs are led out from one end of the battery cell side by side, and two liquid absorbing strips at equal distances from the battery cell are of an integral structure.
Through adopting above-mentioned technical scheme, can draw forth positive and negative pole ear in the one end of electric core to can make things convenient for the installation of imbibition strip, can set up the imbibition strip of bigger volume simultaneously, with better imbibition ability, the better battery seepage of avoiding the preparation.
In an optional embodiment, tabs are respectively led out from two ends of the battery cell.
By adopting the technical scheme, the positive and negative electrode lugs can be respectively led out from the two ends of the battery cell, so that the direct packaging area of the aluminum plastic film and the aluminum plastic film with larger area at each end of the battery cell is increased, the sealing performance is improved, and the electrolyte leakage is better prevented.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and 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 the drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of an aluminum-plastic film of a pouch battery top seal structure provided by the first embodiment of the present invention when opened;
fig. 2 is the utility model provides a front view structure schematic diagram two when the plastic-aluminum membrane of laminate polymer battery top seal structure is opened.
Fig. 3 is the utility model provides a second front view structure schematic diagram when the plastic-aluminum membrane of laminate polymer battery top seal structure opens.
Fig. 4 is the utility model provides a third aluminum-plastic film who provides when laminate polymer battery top seal structure opens orthographic view structure schematic diagram.
Fig. 5 is the utility model provides a fourth when providing laminate polymer battery top seal structure's plastic-aluminum membrane open front view structure schematic diagram.
Fig. 6 is the utility model discloses when the plastic-aluminum membrane of laminate polymer battery top seal structure that embodiment five provided is opened orthographic view structure schematic diagram.
Wherein, in the drawings, the reference numerals are mainly as follows:
100-a soft package battery top sealing structure;
11-electric core;
12-a tab; 121-a metal strip; 122-tab glue;
13-an aluminum plastic film; 131-pit punching; 132-a receiving groove;
14-wicking strips.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the meaning of "a plurality" is two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Reference throughout the specification to "one embodiment," "some embodiments," or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The first embodiment is as follows:
referring to fig. 1 and fig. 2, a pouch battery top sealing structure 100 according to the present invention will now be described. The top sealing structure 100 of the soft package battery comprises a battery cell 11, a tab 12 and an aluminum-plastic film 13, wherein the tab 12 is installed on the battery cell 11 so as to lead out an electrode of the battery cell 11. Generally, the battery cell 11 has a positive electrode and a negative electrode, and therefore two tabs 12 are generally connected to the battery cell 11 to connect to the positive electrode and the negative electrode of the battery cell 11, respectively, the tab 12 connected to the positive electrode of the battery cell 11 forms a positive electrode tab, and similarly, the tab 12 connected to the negative electrode of the battery cell 11 forms a negative electrode tab. The aluminum-plastic film 13 wraps the cell 11 to protect the cell 11. The tab 12 includes a metal band 121 and at least two tab adhesives 122, each tab adhesive 122 wraps the corresponding metal band 121, and the metal band 121 is connected with the battery cell 11 to lead out an electrode of the battery cell 11. One end of the metal strip 121 extends out of the aluminum plastic film 13, so that the electrode of the battery cell 11 is led out of the aluminum plastic film 13 for use. Each tab glue 122 is heat sealed with the inner surface of the aluminum plastic film 13 to fixedly seal the metal strip 121 to the aluminum plastic film 13. Any two adjacent tab glue 122 on the metal belt 121 are arranged at intervals, so that the metal belt 121 can be better fixed in the aluminum plastic film 13, and at least two tab glue 122 are arranged, so that the connection firmness of the metal belt 121 and the aluminum plastic film 13 can be improved, and the probability of liquid leakage caused by delamination and stripping of the tab glue 122 is reduced; the liquid absorbing strip 14 is arranged between two adjacent tab glue 122 on the metal belt 121, so that when the electrolyte in the battery cell 11 seeps from one tab glue 122, the electrolyte can be absorbed by the liquid absorbing strip 14, so as to better prevent the electrolyte from leaking.
Generally, the inner surface of the aluminum plastic film 13 is provided with an insulating layer (not shown) to prevent the aluminum plastic film 13 from being electrically connected to the metal strap 121 when the metal strap 121 is led out. In addition, when the aluminum plastic film 13 is heat sealed, the insulating layer on the aluminum plastic film 13 can be more tightly combined to ensure a good sealing effect of the aluminum plastic film 13. In an embodiment, the material of one tab adhesive 122 close to the electric core 11 is the same as the insulating layer, so that when heat sealing is performed, the tab adhesive 122 and the insulating layer can be connected in a better heat sealing manner, the tightness and firmness of connection are ensured, and the probability of leakage between the aluminum plastic film 13 and the tab adhesive 122 is reduced.
In one embodiment, the insulation layer on the inner surface of the aluminum plastic film 13 is a cast polypropylene layer (CPP). The material of one tab glue 122 close to the battery cell 11 is a modified polypropylene material (chinese: polypropylene, english: polypropylene, abbreviated as PP) or a cast polypropylene material, and this makes the tab glue 122 made of the same material as the insulating layer on the inner surface of the aluminum-plastic film 13, so as to ensure that the tab glue 122 is in good, tight and firm heat sealing connection with the inner surface of the aluminum-plastic film 13. Of course, when the insulating layer on the inner surface of the aluminum-plastic film 13 is made of other plastic materials, the corresponding tab glue 122 may also be made of corresponding materials.
Of course, in some embodiments, the material of one tab glue 122 close to the battery cell 11 may also be set to be close to the material of the insulating layer, and it may also be ensured that the aluminum plastic film 13 is well and firmly bonded to the tab glue 122 close to the battery cell 11. In some embodiments, the material of each tab adhesive 122 may be the same as that of the insulating layer, so as to ensure that each tab adhesive 122 is tightly and firmly bonded to the insulating layer.
In an embodiment, the material of one tab adhesive 122 close to the battery cell 11 is the same as that of the insulating layer, and other tab adhesives 122 may be yellow adhesive, white adhesive or black adhesive, and may be specifically selected according to the specification of the battery to reduce the cost and meet the user's requirements.
In an embodiment, one tab adhesive 122 close to the battery cell 11 is a single layer adhesive, which not only reduces the cost, but also avoids the delamination problem of the tab adhesive 122 close to the battery cell 11, thereby better preventing the tab adhesive 122 from leaking.
In one embodiment, the wicking strip 14 is foam. In other embodiments, the absorbent strip 14 may be cotton or sponge. In still other embodiments, the wicking strip 14 can be made from other fluid absorbent materials. The method can be selected for use according to the user requirements so as to meet the requirements of different users and optimize the cost.
In one embodiment, receiving channel 132 is formed in aluminum-plastic film 13, and absorbent strip 14 is disposed in receiving channel 132 to facilitate mounting of absorbent strip 14, and to provide absorbent strip 14 with a certain expansion space to facilitate absorption of liquid by absorbent strip 14.
In an embodiment, the accommodating grooves 132 may be disposed on the aluminum plastic film 13 corresponding to the side edges of the two sides of the battery cell 11, and the wicking strips 14 may be disposed in the accommodating grooves 132, or the wicking strip 14 may be disposed in only one accommodating groove 132, so that the wicking strip 14 with a larger volume may be disposed to improve the liquid absorbing capacity. In other embodiments, the accommodating groove 132 may be disposed on the aluminum plastic film 13 corresponding to one side of the electric core 11, and the wicking strip 14 is disposed in the accommodating groove 132 only.
In one embodiment, in two adjacent tab glues 122 on the metal strip 121: the length of one tab adhesive 122 close to the battery cell 11 is greater than or equal to the length of the other tab adhesive 122. The tab glue 122 close to the battery cell 11 is relatively long, so that the metal belt 121 is close to the battery cell 11 and is tightly and firmly connected with the aluminum plastic film 13 in a sealing manner, the connection strength between the tab glue 122 and the aluminum plastic film 13 is weakened by the battery cell 11 outwards in sequence, and the tab glue 122 close to one end of the battery cell 11 is more firmly bonded with the aluminum plastic film 13, so that leakage is better prevented.
In one embodiment, the projection of each tab film 122 along the length of the metal strip 121 at the location of the adjacent wicking strips 14 is located on the area covered by the wicking strips 14. Namely, along the length direction of the metal belt 121, the projection of each tab adhesive 122 at the position of the adjacent absorbent bar 14 coincides with the area covered by the absorbent bar 14, or along the length direction of the metal belt 121, the projection of each tab adhesive 122 at the position of the adjacent absorbent bar 14 is located inside the area covered by the absorbent bar 14. Along the length direction of the metal belt 121, the projection of the tab glue 122 at the position adjacent to the absorbent bar 14 coincides with the area covered by the absorbent bar 14, and then, along the direction perpendicular to the length direction of the metal belt 121, one end of the tab glue 122 is aligned with one end of the absorbent bar 14, and the other end of the tab glue 122 is also aligned with the other end of the absorbent bar 14, that is, the tab glue 122 is equal to the absorbent bar 14 in length. The projection of the tab paste 122 on the position adjacent to the wicking strip 14 along the length direction of the metal strip 121 is located inside the area covered by the wicking strip 14, and then, by aligning one end of the tab paste 122 with one end of the wicking strip 14 along the direction perpendicular to the length direction of the metal strip 121, the other end of the tab paste 122 is closer to the metal strip 121 than the other end of the wicking strip 14, that is, the length of the tab paste 122 is smaller than the length of the wicking strip 14. In the above embodiment, the projection of the tab paste 122 at the position of the adjacent wicking strip 14 along the length direction of the metal strip 121 is located inside the region covered by the wicking strip 14, and the middle of the tab paste 122 in the length direction is aligned with the middle of the metal strip 121 in the width direction, and the middle of the corresponding wicking strip 14 in the length direction is aligned with the middle of the metal strip 121 in the width direction, so that the two ends of the tab paste 122 are closer to the metal strip 121 than the wicking strip 14. This structure is such that the length of each tab film 122 in the direction perpendicular to the metal belt 121 is less than or equal to the length of the adjacent absorbent strip 14. And along the length direction of the metal belt 121, the projection of each tab adhesive 122 on the position of the adjacent absorbent strip 14 is positioned on the area covered by the absorbent strip 14, so that when the tab adhesive 122 leaks, the tab adhesive can be absorbed by the adjacent absorbent strip 14 more quickly and effectively.
In one embodiment, the middle of the tab paste 122 in the length direction is aligned with the middle of the metal tape 121 in the width direction, so that the both sides of the metal tape 121 are evenly stressed when the tab paste 122 is heat-sealed with the aluminum plastic film 13.
In one embodiment, two tabs 12 are led out from one end of the battery cell 11 side by side, and the two tabs 12 may be respectively connected to the positive electrode and the negative electrode of the battery cell 11, so that the positive electrode tab 12 and the negative electrode tab 12 may be led out from one end of the battery cell 11; correspondingly, the liquid absorbing strip 14 can be arranged on the aluminum plastic film 13 corresponding to one end of the battery cell 11, so as to facilitate processing and manufacturing.
In an embodiment, when two utmost point ears 12 were drawn forth side by side to the one end of electric core 11, two imbibition strips 14 that the distance to electric core 11 equals the department are integrative structure, then on the strap 121 of two utmost point ears 12, the imbibition body of same distance apart from electric core 11 is integrative structure, reach electric core 11 same distance department promptly, only set up one imbibition strip 14, and make this imbibition body extend to the position that two utmost point ears 12 correspond, can make things convenient for the installation of imbibition strip 14, can set up the imbibition strip 14 of bigger volume simultaneously, with better imbibition ability, better electrolyte leakage is avoided.
In one embodiment, when two tabs 12 are led out from one end of the battery cell 11 side by side, along the length direction of the metal belt 121, the projection of each tab glue 122 on the position adjacent to the wicking strip 14 is located on the area covered by the wicking strip 14. The maximum length between the two tab adhesives 122 on the two metal strips 121 at the same position from the battery cell 11 should be less than or equal to the length of the adjacent wicking strip 14, so that the wicking strip 14 can absorb the electrolyte leaked from the adjacent tab adhesives 122 more quickly and efficiently.
In one embodiment, the aluminum plastic film 13 is further provided with a punching pit 131 for accommodating and mounting the battery cell 11.
Example two:
referring to fig. 3, the difference between the pouch battery top sealing structure 100 of the present embodiment and the pouch battery top sealing structure of the first embodiment is:
in this embodiment, the tabs 12 are respectively led out from the two ends of the battery cell 11, and the positive and negative tabs 12 can be respectively led out from the two ends of the battery cell 11, so that the direct packaging area of the aluminum plastic film 13 and the aluminum plastic film 13 with larger areas at the two ends of the battery cell 11 is increased, the sealing performance is improved, and the electrolyte leakage is better prevented.
In one embodiment, two tab glues 122 are disposed on the metal strip 121 of each tab 12 to reduce the cost.
Other structures of the pouch battery top sealing structure 100 of this embodiment are the same as those of the pouch battery top sealing structure of the first embodiment, and are not described herein again.
Example three:
referring to fig. 4, the difference between the pouch battery top sealing structure 100 of the present embodiment and the pouch battery top sealing structure of the second embodiment is:
in this embodiment, three tab adhesives 122 are disposed on the metal belt 121 of each tab 12 to increase the connection firmness between the metal belt 121 and the aluminum-plastic film 13, so as to reduce the probability of liquid leakage caused by delamination of the tab adhesives 122.
In some embodiments, four, five, etc. tab glue 122 may be disposed on each metal strip 121.
In one embodiment, a wicking strip 14 is disposed between the two tab pastes 122 away from the cell 11 so that the electrolyte is absorbed by the wicking strip 14 at the end of the electrolyte leakage.
Other structures of the pouch battery top sealing structure 100 of this embodiment are the same as those of the pouch battery top sealing structure of the second embodiment, and are not described herein again.
Example four:
referring to fig. 5, the difference between the pouch battery top sealing structure 100 of the present embodiment and the pouch battery top sealing structure of the third embodiment is:
in this embodiment, three tab adhesives 122 are disposed on the metal tape 121 of each tab 12, and the liquid absorbing strip 14 is disposed between two tab adhesives 122 adjacent to the battery cell 11, so that when the electrolyte leaks from the tab adhesive 122 adjacent to the battery cell 11, the electrolyte can be rapidly absorbed by the liquid absorbing strip 14.
In one embodiment, when four, five, etc. tab adhesives 122 can be further disposed on each metal belt 121, a wicking strip 14 can be disposed between two adjacent tab adhesives 122.
Other structures of the pouch battery top sealing structure 100 of this embodiment are the same as those of the pouch battery top sealing structure of the third embodiment, and are not described herein again.
Example five:
referring to fig. 6, the difference between the pouch battery top sealing structure 100 of the present embodiment and the pouch battery top sealing structure of the third embodiment is:
in this embodiment, three tab adhesives 122 are disposed on the metal tape 121 of each tab 12, and a liquid absorbing strip 14 is disposed between any two adjacent tab adhesives 122, so as to improve the electrolyte absorbing capability.
In one embodiment, when four, five, etc. tab adhesives 122 can be further disposed on each metal belt 121, a wicking strip 14 can be disposed between any two tab adhesives 122.
Other structures of the pouch battery top sealing structure 100 of this embodiment are the same as those of the pouch battery top sealing structure of the third embodiment, and are not described herein again.
The above description is only an alternative embodiment of the present invention, and should not be construed as limiting the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Laminate polymer battery top seals structure, including electric core, install in utmost point ear and parcel on the electric core the plastic-aluminum membrane of electric core, its characterized in that: the utmost point ear include with the strap that the electric core links to each other with wrap up in at least twice utmost point ear glue on the strap, the one end of strap is stretched out the plastic-aluminum membrane, each way utmost point ear glue with the internal surface heat-seal of plastic-aluminum membrane links to each other, arbitrary adjacent twice on the strap utmost point ear glue the interval sets up, adjacent twice on the strap be equipped with the imbibition strip between the utmost point ear glue.
2. The pouch cell overseal structure of claim 1, wherein: the inner surface of the aluminum-plastic film is provided with an insulating layer, and the material of the tab glue close to the battery cell is the same as that of the insulating layer.
3. The pouch cell overseal structure of claim 2, wherein: the insulating layer is a cast polypropylene layer, and the material of the tab glue close to the battery cell is a modified polypropylene material or a cast polypropylene material.
4. The pouch cell overseal structure of claim 3, wherein: and one of the tab glue close to the battery cell is a single-layer glue.
5. The pouch cell overseal structure of any one of claims 1 to 4, wherein: the liquid absorbing strip is made of foam, cotton cloth or sponge.
6. The pouch cell overseal structure of any one of claims 1 to 4, wherein: and a containing groove for containing the liquid absorbing strip is arranged in the aluminum plastic film.
7. The top seal structure of the soft package battery according to any one of claims 1 to 4, wherein in two adjacent tab films on the metal strip: the length of one tab glue close to the battery core is greater than or equal to that of the other tab glue.
8. The top seal structure of the soft package battery according to any one of claims 1 to 4, wherein along the length direction of the metal strip, the projection of each tab glue line at the position adjacent to the liquid absorbing strip is positioned on the area covered by the liquid absorbing strip.
9. The pouch cell overseal structure of claim 8, wherein: two tabs are led out from one end of the battery cell side by side, and two liquid suction strips at equal distances from the battery cell are of an integral structure.
10. The pouch cell overseal structure of claim 8, wherein: the lugs are respectively led out from two ends of the battery cell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021249632.9U CN212342769U (en) | 2020-06-30 | 2020-06-30 | Soft-package battery top sealing structure |
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| CN202021249632.9U CN212342769U (en) | 2020-06-30 | 2020-06-30 | Soft-package battery top sealing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114628857A (en) * | 2021-08-16 | 2022-06-14 | 万向一二三股份公司 | Negative electrode lug for soft package lithium battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114628857A (en) * | 2021-08-16 | 2022-06-14 | 万向一二三股份公司 | Negative electrode lug for soft package lithium battery |
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