CN214898784U - Utmost point ear is glued structure, utmost point ear and laminate polymer battery - Google Patents
Utmost point ear is glued structure, utmost point ear and laminate polymer battery Download PDFInfo
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- CN214898784U CN214898784U CN202120639203.0U CN202120639203U CN214898784U CN 214898784 U CN214898784 U CN 214898784U CN 202120639203 U CN202120639203 U CN 202120639203U CN 214898784 U CN214898784 U CN 214898784U
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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
Abstract
The utility model relates to the technical field of batteries, a utmost point ear is glued to be constructed, utmost point ear and laminate polymer battery is provided, this utmost point ear is glued to be constructed for with the hot melt layer heat-seal mutually of plastic-aluminum membrane, utmost point ear is glued to be constructed including utmost point ear glue main part, utmost point ear glue main part have relative setting and all towards the first heat-seal terminal surface and the second heat-seal terminal surface on the hot melt layer of plastic-aluminum membrane, first heat-seal terminal surface with/or the second heat-seal terminal surface on seted up anti-overflow glue groove structure. The utility model provides a glued structure of utmost point ear, this glued structure of utmost point ear include utmost point ear gluey main part to, glue the main part towards the first hot melt terminal surface on the hot melt layer of plastic-aluminum membrane and/or offered anti-overflow glue groove structure on the second hot melt terminal surface at utmost point ear, form promptly on the terminal surface of utmost point ear gluey main part and spill over the district, the homogenization distribution is realized to the gluey groove structure of molten glue solution accessible anti-overflow, thereby ensures the plane nature of the banding department of plastic-aluminum membrane.
Description
Technical Field
The utility model relates to the technical field of batteries, especially, provide an utmost point ear gel structure, have utmost point ear of this utmost point ear gel structure and have the laminate polymer battery of this utmost point ear.
Background
The top sealing of the soft package battery cell is to use the hot melting layer of the tab glue and the aluminum plastic film to fuse and package the tab welded with the current collector. Wherein the encapsulation effect is influenced by the pressure, temperature and encapsulation time of the end socket. The temperature and the pressure are too low, the time is too short, the aluminum plastic film hot melting layer and the tab glue cannot be fused, the packaging strength cannot meet the sealing requirement, air cannot be effectively isolated, and even electrolyte leakage is caused. The temperature and the pressure are too high, the packaging time is too long, glue is seriously overflowed during heat sealing, even the tab glue and the hot melt layer are burnt, and the poor insulation between the tab and the aluminum plastic film is caused. Poor insulation not only increases the risk of short circuit, and poor insulation between the cathode tab and the aluminum-plastic film can also cause the aluminum chromatography of lithium on the aluminum-plastic film, form alloy pulverization, and cause corrosion of the aluminum-plastic film.
In the top sealing process, after the hot melting layer of the tab glue and the aluminum plastic film is subjected to hot melting, the tab glue overflows outwards under the action of pressure, and the overflowing glue solution is solidified to influence the smoothness of the edge sealing of the aluminum plastic film, so that the edge sealing is seriously deformed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the smoothness of the edge sealing is influenced by the overflow glue when the hot melt layer of the aluminum plastic film is encapsulated by the conventional tab glue.
In order to achieve the above object, the utility model adopts the following technical scheme:
first aspect, this application provides a glued structure of utmost point ear for with the hot melt layer heat-seal mutually of plastic-aluminum membrane, glued structure of utmost point ear includes utmost point ear gluey main part, and utmost point ear gluey main part has relative setting and all towards the first heat-seal terminal surface and the second heat-seal terminal surface on the hot melt layer of plastic-aluminum membrane, has seted up the anti-overflow and has glued the groove structure on first heat-seal terminal surface and \ or the second heat-seal terminal surface.
The utility model has the advantages that: the utility model provides a glued structure of utmost point ear, this glued structure of utmost point ear include utmost point ear gluey main part to, glue the main part towards the first hot melt terminal surface on the hot melt layer of plastic-aluminum membrane and/or offered anti-overflow glue groove structure on the second hot melt terminal surface at utmost point, form the homogenization district promptly on the contact terminal surface of utmost point ear gluey main part, the homogenization distribution is realized to the gluey groove structure of molten glue solution accessible anti-overflow, thereby ensures the plane nature of the banding department of plastic-aluminum membrane.
In one embodiment, the glue overflow preventing groove structure comprises a plurality of grooves, and each groove is arranged on the first heat-sealing end surface and/or the second heat-sealing end surface at intervals.
By adopting the technical scheme, the glue solution is backfilled on the first heat-seal end face and/or the second heat-seal end face by utilizing the channel, so that the glue solution is prevented from overflowing to influence the flatness of the edge sealing position.
In one embodiment, each channel extends along the length direction of the tab glue main body; or extend along the width direction of the tab glue main body; or extend along the diagonal direction of the tab glue main body; or the tab glue main bodies are arranged in a staggered manner in the length direction and the width direction.
By adopting the technical scheme, the arrangement direction of each channel is adjusted according to specific requirements, and the adaptability of each channel is improved.
In one embodiment, the channels are arranged on the first heat-sealing end surface and/or the second heat-sealing end surface at equal intervals.
Through adopting above-mentioned technical scheme, set up each channel equidistant, apply even heat-seal power when being applicable to the banding, perhaps, the even condition of heating temperature when being applicable to the banding.
In one embodiment, the distance between the grooves is gradually changed on the first heat-sealing end surface and/or the second heat-sealing end surface.
In one embodiment, each channel is arranged on the first heat-sealing end surface and/or the second heat-sealing end surface in a central radiation or angular radiation mode.
By adopting the technical scheme, the arrangement direction of each channel is adjusted according to specific requirements, and the adaptability of each channel is improved.
Through adopting above-mentioned technical scheme, set up the interval gradual change of each channel, exert inhomogeneous heat-seal force when being applicable to the banding, perhaps, the uneven condition of heating temperature when being applicable to the banding.
In one embodiment, the cross-section of each channel is any one or more of square, semi-circular, triangular or trapezoidal.
Through adopting above-mentioned technical scheme, according to the actual use demand, select the cross sectional shape of channel.
In one embodiment, the channel has a cross-sectional width in the range of 5mm to 9 mm; the depth range of the channel is 0.01 mm-0.1 mm; the distance between two adjacent channels ranges from 0.5mm to 5 mm.
By adopting the technical scheme, the section width, the depth and the spacing size of the proper channel are selected to avoid the overflow of glue solution.
In a second aspect, the present application further provides a tab, which includes a metal sheet and further includes the tab glue structure, and the tab glue structure is coated on the outer side of the metal sheet.
The utility model has the advantages that: the utility model provides a utmost point ear, on the basis that has above-mentioned utmost point ear glued structure, can guarantee with the requirement of planarization when the plastic-aluminum membrane encapsulation.
In a third aspect, the application further provides a pouch battery, which includes the tab.
The utility model has the advantages that: the utility model provides a laminate polymer battery, on the basis that has above-mentioned utmost point ear, its banding is more level and more smooth, and encapsulation intensity is higher, and factor of safety is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a cross-sectional view of a tab glue structure according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a tab glue structure according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a tab glue structure according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a tab glue structure according to an embodiment of the present invention;
fig. 5 is a top view of a tab glue structure according to an embodiment of the present invention;
fig. 6 is a top view of a tab glue structure according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a tab according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
the tab glue structure 100, the tab glue main body 10, the first heat-sealing end face 10a, the second heat-sealing end face 10b, the anti-overflow glue groove structure 20, and the metal sheet 200.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely 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.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
When the metal sheets of the tabs are packaged in the aluminum plastic film, the tab glue is packaged together with the hot melting layer of the aluminum plastic film. The packaging effect depends on the pressure, temperature and packaging time of the end socket, and in addition, the state of the tab glue after hot melting is also an important parameter influencing the packaging effect. Because the tab glue after hot melting easily overflows outwards, thereby causing the flatness of the packaging position to be poor, to the above-mentioned problem, the application provides a tab glue structure, please refer to the following embodiment specifically:
referring to fig. 1, the tab glue structure 100 is used for heat sealing with a hot melt layer of an aluminum plastic film. Specifically, the tab glue structure 100 includes a tab glue main body 10, the tab glue main body 10 has a first heat-sealing end surface 10a and a second heat-sealing end surface 10b which are oppositely disposed and all face the hot-melting layer of the aluminum plastic film, and an anti-overflow glue groove structure 20 is provided on the first heat-sealing end surface 10a and/or the second heat-sealing end surface 10 b. It is understood that the tab compound body 10 is sandwiched between two aluminum plastic films such that the first heat-sealed end surface 10a faces the hot-melt layer of one of the aluminum plastic films and the second heat-sealed end surface 10b faces the hot-melt layer of the other aluminum plastic film. Moreover, an anti-overflow glue groove structure 20 is arranged on the first heat-seal end surface 10 a; or, the second heat-sealing end face 10b is provided with an anti-overflow glue groove structure 20; or, the glue overflow preventing groove structures 20 are respectively arranged on the first heat-sealing end surface 10a and the second heat-sealing end surface 10 b. Here, the glue overflow prevention groove structure 20 is a groove-shaped structure, and a specific groove-shaped structure form is not limited, when the tab glue main body 10 is melted by hot pressing, the glue overflow prevention groove structure 20 is gradually filled with the hot-melt glue, that is, the space of the groove-shaped structure is filled, so that the probability of glue overflow of the tab glue main body 10 is reduced, and the smoothness of the edge sealing after hot sealing can be improved.
The utility model provides a glued structure of utmost point ear 100, this glued structure of utmost point ear 100 includes utmost point ear gluey main part 10 to, glue main part 10 towards the first hot melt terminal surface 10a on the hot melt layer of plastic-aluminum membrane and/or offered anti-overflow glue groove structure 20 on the second hot melt terminal surface 10b at utmost point ear, form the homogenization district promptly on the contact terminal surface of utmost point ear gluey main part 10, the homogenization distribution is realized to fused glue solution accessible anti-overflow glue groove structure 20, thereby ensures the planarization of the banding department of plastic-aluminum membrane.
Referring to fig. 1 to 4, in one embodiment, the glue overflow preventing groove structure 20 includes a plurality of grooves, and each groove is disposed on the first heat-sealing end surface 10a and/or the second heat-sealing end surface 10b at intervals. By adopting the technical scheme, the glue solution is backfilled on the first heat-seal end face 10a and/or the second heat-seal end face 10b by utilizing the channel, so that the glue solution is prevented from overflowing to influence the flatness of the edge sealing position. Here, the opening direction, the number, and the cross-sectional shape of each groove are not limited, and the molten tab film body 10 is mainly uniformly distributed. Specifically, the opening direction of each channel may extend along the length direction of the tab glue main body 10 or along the width direction thereof, or alternatively, the channels are arranged in a staggered manner, that is, in both the length direction and the width direction of the tab glue main body. Of course, the opening direction of each channel may also form an included angle with the length direction or width of the tab glue main body 10, so that each channel is obliquely arranged on the tab glue main body 10.
Referring to fig. 1, in one embodiment, the grooves are equally spaced on the first heat-seal end surface 10a and/or the second heat-seal end surface 10 b. It can be understood that when the hot-press head applies pressure to the joint of the aluminum plastic film and the tab uniformly during heat sealing, the tab adhesive is heated uniformly, that is, the tab adhesive main body 10 after melting fills each channel, so as to meet the requirement of uniform distribution after the tab adhesive main body 10 is heated and melted. For example, the respective channels are arranged at equal intervals in the length direction or the width direction of the tab glue main body 10; or, the arrangement direction of each channel may also form an included angle with the length direction or the width direction of the tab glue main body 10, and then the channels are sequentially arranged at equal intervals; or, one end of each channel is communicated with each other and takes the central point of the tab glue main body 10 as a starting point, and the other end of each channel is radially outwards diverged, and the included angle between the channels is the same.
Through adopting above-mentioned technical scheme, set up each channel equidistant, apply even heat-seal power when being applicable to the banding, perhaps, the even condition of heating temperature when being applicable to the banding.
Alternatively, in another embodiment, the pitch of each channel is gradually changed on the first heat-seal end face 10a and/or the second heat-seal end face 10 b. Here, the pitch of the respective channels is gradually changed, and it is understood that the pitch between the respective channels is not uniform and shows a tendency that the pitch is gradually increased or gradually decreased. For example, the distance between the channels gradually increases or decreases from one side of the tab glue main body 10 to the other side; or, taking the middle part of the tab glue main body 10 as a layout starting point, the distance between the channels is in a gradually increasing or gradually decreasing trend towards the two sides of the tab glue main body 10; or, one end of each channel is communicated with each other and takes the central point of the tab glue main body 10 as an initial position, the other end is radially outwards diverged, and the included angle between the channels is gradually increased or gradually decreased.
Through adopting above-mentioned technical scheme, set up the interval gradual change of each channel, exert inhomogeneous heat-seal force when being applicable to the banding, perhaps, the uneven condition of heating temperature when being applicable to the banding.
Optionally, referring to fig. 5 and fig. 6, in the present embodiment, the glue overflow preventing groove structure 20 is a plurality of concave pits formed on the tab glue main body 10. It can be understood that the tab glue main body 10 flows into each concave pit after being heated to be in a molten state, so that glue overflow of the tab glue main body 10 is avoided. Here, the concave hole is a blind hole through which the tab glue body 10 does not penetrate, and the outline is not limited, and may be a circular concave hole, a square concave hole, or an irregularly shaped concave hole. Meanwhile, the arrangement form of each pit can be diversified, for example, each pit is arranged on the first heat-seal end face 10a and/or the second heat-seal end face 10b of the tab glue main body 10 in an array arrangement mode, and the condition is suitable for applying uniform heat-seal force during edge sealing or is suitable for the condition of uniform heating temperature during edge sealing. Alternatively, the recesses may be arranged in a specific direction, for example, in a row along the length direction or the width direction of the tab film body 10. Or, each pit takes the central point of the tab glue main body 10 as an initial position and is radially outwards diverged.
Referring to fig. 1 to 4, in an embodiment, the cross section of each channel is one or more of a square, a semicircle, a triangle or a trapezoid. It will be appreciated that the cross-sectional area of the channel reflects its ability to accommodate the tab compound in molten state, i.e., the rate of filling of the tab compound in molten state per unit time, which can also further improve packaging. For example, the channel with the semicircular or triangular cross section is easier to fill, i.e. has a higher filling rate, and is suitable for the situation that the heating temperature is lower when the edge sealing is carried out, i.e. the requirement on the fluidity of the tab adhesive in a molten state is low. And the channel with the square or trapezoidal cross section has more edges and corners and is more difficult to fill, so that the channel is suitable for the condition of higher heating temperature during edge sealing, namely, the requirement on the fluidity of the tab glue in a molten state is higher.
Through adopting above-mentioned technical scheme, according to the actual use demand, select the cross sectional shape of channel.
In one embodiment, the channel has a cross-sectional width in the range of 5mm to 9 mm. It is understood that the cross-sectional width of the channel may be an integer of 5mm, 6mm, 7mm, 8mm, 9mm, etc., or a decimal of 5.1mm, 6.03mm, 7.8mm, etc. And according to the actual use requirement, selecting a proper section width value range.
In one embodiment, the depth of the channel ranges from 0.01mm to 0.1 mm. It is understood that the depth of the channels may be 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, etc. Of course, other values within the range of 0.01mm to 0.1mm are also possible. And, the depth dimension of the channel is selected to avoid glue solution overflow.
In one embodiment, the distance between two adjacent channels ranges from 0.5mm to 5 mm. It will be appreciated that the spacing between two adjacent channels may be the shortest distance between the two or, alternatively, the distance between the centerlines of the two channels. Here, the interval between adjacent two channels may be 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, or the like. Of course, other values within the range of 0.01mm to 0.1mm are also possible. And the distance range of two adjacent channels is selected to avoid glue solution overflow.
Referring to fig. 7, the present application further provides a tab, which includes a metal sheet 200, and further includes the tab glue structure 100, where the tab glue structure 100 is coated on an outer side of the metal sheet 200.
The utility model provides a tab, on the basis that has above-mentioned utmost point ear glued structure 100, can guarantee with the requirement of planarization when the plastic-aluminum membrane encapsulation.
In one embodiment, the tab glue structure 100 is shaped by a mold, and finally, the metal sheet 200 is covered with a regular contour.
In a third aspect, the application further provides a pouch battery, which includes the tab.
The utility model provides a laminate polymer battery, on the basis that has above-mentioned utmost point ear, its banding is more level and more smooth, and encapsulation intensity is higher, and factor of safety is high.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a structure is glued to utmost point ear for with the hot melt layer heat-seal mutually of plastic-aluminum membrane, its characterized in that: the tab glue structure comprises a tab glue main body, wherein the tab glue main body is provided with a first heat-seal end face and a second heat-seal end face which are oppositely arranged and all face towards a hot-melt layer of the aluminum plastic film, and an anti-overflow glue groove structure is arranged on the first heat-seal end face and/or the second heat-seal end face.
2. The tab glue structure of claim 1, characterized in that: the anti-overflow glue groove structure comprises a plurality of grooves, and the grooves are arranged on the first heat-seal end face and/or the second heat-seal end face at intervals.
3. The tab glue structure of claim 2, characterized in that: each channel extends along the length direction of the tab glue main body; or extend along the width direction of the tab glue main body; or extend along the diagonal direction of the tab glue main body; or the tab glue main bodies are arranged in a staggered manner in the length direction and the width direction.
4. The tab glue structure of claim 2, characterized in that: the channels are arranged on the first heat-seal end face and/or the second heat-seal end face at equal intervals.
5. The tab glue structure of claim 2, characterized in that: the space of each channel is gradually arranged on the first heat-sealing end face and/or the second heat-sealing end face.
6. The tab glue structure of claim 2, characterized in that: each channel is arranged on the first heat-seal end face and/or the second heat-seal end face in a central radiation or angular radiation manner.
7. A tab glue structure according to claim 2 or 3, characterized in that: the cross section of each channel is in any one or more of a square shape, a semicircular shape, a triangular shape or a trapezoidal shape.
8. The tab glue structure of claim 2, characterized in that: the width range of the cross section of each channel is 5-9 mm, the depth range of each channel is 0.01-0.1 mm, and the distance range between every two adjacent channels is 0.5-5 mm.
9. A utmost point ear, includes the sheetmetal, its characterized in that: the tab glue structure as claimed in any one of claims 1 to 8, which is coated on the outside of the metal sheet.
10. The utility model provides a laminate polymer battery which characterized in that: comprising the tab of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120639203.0U CN214898784U (en) | 2021-03-29 | 2021-03-29 | Utmost point ear is glued structure, utmost point ear and laminate polymer battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120639203.0U CN214898784U (en) | 2021-03-29 | 2021-03-29 | Utmost point ear is glued structure, utmost point ear and laminate polymer battery |
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| CN214898784U true CN214898784U (en) | 2021-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614174A (en) * | 2022-03-29 | 2022-06-10 | 东莞新能安科技有限公司 | Battery case, battery and electronic device |
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2021
- 2021-03-29 CN CN202120639203.0U patent/CN214898784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614174A (en) * | 2022-03-29 | 2022-06-10 | 东莞新能安科技有限公司 | Battery case, battery and electronic device |
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