CN218242200U - Insulating film and single battery - Google Patents
Insulating film and single battery Download PDFInfo
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- CN218242200U CN218242200U CN202221928874.XU CN202221928874U CN218242200U CN 218242200 U CN218242200 U CN 218242200U CN 202221928874 U CN202221928874 U CN 202221928874U CN 218242200 U CN218242200 U CN 218242200U
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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 application provides an insulating film and a single battery. The insulating film comprises a base material and an adhesive layer, wherein the adhesive layer is positioned on one side of the base material; at least one end of the insulating film along the length direction of the insulating film is provided with a first area, a second area and a third area, the first area, the second area and the third area are sequentially arranged along the width direction of the insulating film, and one side edge of the second area, which is far away from the middle part of the insulating film, is also provided with an extension area; the first zone, the second zone, the third zone and the extension zone can be bent to enable the second zone, the first zone and the third zone to be sequentially stacked, and a part of the bonding layer at the bending position of the first zone and/or a part of the bonding layer at the bending position of the third zone are bonded with a part of the bonding layer of the extension zone respectively to form a stacked structure which can be attached to the side face of the shell of the single battery. This application sets up the extension district through the side of keeping away from the insulating film middle part in the second district of insulating film, and the extension district has increased the closed length of insulating film at monomer battery's casing side turn position, can strengthen water-proof effects, improves monomer battery's waterproof performance.
Description
Technical Field
The application belongs to the technical field of batteries, and particularly relates to an insulating film and a single battery.
Background
The exterior of the single battery is usually coated with an insulating protective film, which plays the roles of insulating protection and appearance beautification for the single battery. The existing single battery external envelope generally adopts two wrapping modes: the single battery packaging method is a 'returning' type packaging method which starts packaging the film from the side edge of the single battery, exposes the bottom and sticks the insulating sheet on the top, and the other method is a 'U' type packaging method which starts packaging the film from the bottom and folds the side edge. In the 'back' type coating mode, the bottom of the single battery is exposed outside, and when the single battery falls into water accidentally, the waterproof and insulating effects of the coating mode are poor, so that the single battery is short-circuited or even explodes. Although the problem that the bottom of the single battery is exposed can be solved by the U-shaped coating mode, after coating, the insulating films are overlapped on the side faces of the single batteries, and in the overlapped area, two or more layers of insulating films are bonded and then integrally bonded on the side faces of the single batteries, so that the surfaces of the single batteries in the area and the outermost layer of insulating films cannot be completely contacted at the edges of the interlayer due to the fact that the insulating film interlayer is locally arranged, a water leakage phenomenon is caused, and the waterproof performance of the single batteries is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an insulating film and a single battery to solve the problem that the waterproof performance of the existing single battery is poor.
In a first aspect, an embodiment of the present application provides an insulating film for covering a casing of a single battery, where the insulating film includes a base material and an adhesive layer, and the adhesive layer is located on one side of the base material; along the length direction of the insulating film, at least one end of the insulating film is provided with a first region, a second region and a third region, the first region, the second region and the third region are sequentially arranged along the width direction of the insulating film, and one side edge of the second region, which is far away from the middle part of the insulating film, is also provided with an extension region; the first zone, the second zone, the third zone with the extension zone all can be buckled, so that the second zone the first zone with the third zone is range upon range of in proper order, the part of first zone bending position the adhesive linkage and/or the part of third zone bending position the adhesive linkage respectively with the partial adhesive linkage of extension zone bonds, so as to form can with the laminated structure of the side laminating of casing.
Optionally, the length of the extension region is greater than the length of the second region along the length direction of the insulating film; and/or, the width of the extension region is larger than the width of the second region in the width direction of the insulating film.
Optionally, the extension region includes a first extension region and a second extension region, and the first extension region and the second extension region are spaced apart from each other in a width direction of the insulating film; when the second area, the first area and the third area are overlapped in sequence, the bonding layer is bonded with the bonding layer at the bending position of the first area, and the bonding layer is bonded with the bonding layer at the extending position of the second area.
Optionally, the lengths of the first extension region and the second extension region are both 1mm to 50mm along the length direction of the insulating film.
Optionally, the first extension region and the second extension region each have a width of 5mm to 30mm in a width direction of the insulating film.
Optionally, two first crease lines extending in a width direction of the insulating film are disposed on the insulating film, the two first crease lines separate the insulating film into a first stacked region, a second stacked region, and a cladding region, and the first stacked region, the cladding region, and the second stacked region are sequentially disposed in a length direction of the insulating film; the first and/or second lamination regions include the first, second, third, and extension regions.
Optionally, along the length direction of the insulating film, at least one end of the insulating film is provided with two oblique crease lines, an included angle between the two oblique crease lines is 90 ° to 120 °, and the two oblique crease lines separate an end of the insulating film into the first region, the second region, and the third region.
Optionally, the insulating film is provided with two second crease lines extending along the length direction of the insulating film, the two second crease lines separate the cladding region into a first cladding region, a second cladding region and a third cladding region, and the first cladding region, the second cladding region and the third cladding region are sequentially arranged along the width direction of the insulating film.
Optionally, the first lamination area and the second lamination area are both provided with two third crease lines extending along the length direction of the insulating film, and the two third crease lines pass through the second area and the extension area; one of the third crease lines is collinear with one of the second crease lines, and the other third crease line is collinear with the other second crease line.
In a second aspect, an embodiment of the present application further provides a single battery, where the single battery includes a case and the insulating film described in any one of the above, and the insulating film is wrapped on the case.
Compared with the prior art, the insulating film that this application embodiment provided, the side through keeping away from the insulating film middle part in the second district of insulating film sets up the extension district, and the extension district has increased the seal length of insulating film at the casing side turn position of battery cell, can strengthen water-proof effects to can further improve battery cell's waterproof performance.
The monomer battery that this application embodiment provided through adopting the insulating film cladding that this application embodiment provided on the casing, realizes the cladding and the sealed effect of reinforcing to the casing, can prevent that moisture in the environment from getting into between insulating film and the casing, improves monomer battery's waterproof performance, and then improves monomer battery's safety in utilization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
For a more complete understanding of the present application and its advantages, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts in the following description.
Fig. 1 is a schematic view of a first structure of an insulating film provided in an embodiment of the present application.
Fig. 2 is a schematic diagram of a second structure of an insulating film provided in an embodiment of the present application.
Fig. 3 is a schematic view of a third structure of the insulating film according to the embodiment of the present application.
Fig. 4 is a schematic diagram of a fourth structure of an insulating film provided in an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a single battery provided in an embodiment of the present application.
FIG. 6 is a schematic view of the insulating film after the completion of the steps A to B for covering the case.
Fig. 7 to 8 are schematic views of the state after the insulating film has finished covering the case in steps C to E.
The reference numbers illustrate:
100. an insulating film; 101. a first crease line; 102. oblique crease lines; 103. a second crease line; 104. a third crease line; 110. a first fold away area; 111. a first region; 112. a second region; 113. a third region; 114. an extension region; 1141. a first extension region; 1142. a second extension region; 120. a second fold region; 130. a cladding region; 131. a first cladding region; 132. a second cladding region; 133. a third cladding region; 200. a housing; 210. a bottom surface; 220. a first side; 230. a second side.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the present application provides an insulating film 100, the insulating film 100 is used for covering a case 200 of a single battery, and the insulating film 100 is not limited to a PP (polypropylene) film or a PET (polyethylene terephthalate) film.
The insulating film 100 provided by the embodiment of the application comprises a substrate and an adhesive layer, wherein the adhesive layer is positioned on one side of the substrate; as shown in fig. 1 to 4, at least one end of the insulating film 100 is provided with a first region 111, a second region 112, and a third region 113 along the length direction of the insulating film 100, the first region 111, the second region 112, and the third region 113 are sequentially arranged along the width direction of the insulating film 100, and one side of the second region 112 away from the middle of the insulating film 100 is further provided with an extension region 114; the first region 111, the second region 112, the third region 113 and the extension region 114 can be bent, so that the second region 112, the first region 111 and the third region 113 are sequentially stacked, and a part of the bonding layer at the bent position of the first region 111 and/or a part of the bonding layer at the bent position of the third region 113 are bonded with a part of the bonding layer of the extension region 114 respectively, so as to form a stacked structure which can be attached to the side surface of the housing 200.
Compared with the prior art, the extension region 114 is arranged on the side edge of the second region 112 of the insulating film 100, which is far away from the middle part of the insulating film 100, and the extension region 114 increases the closed length of the insulating film 100 at the side turning position of the shell 200 of the single battery, so that the waterproof effect can be enhanced, and the waterproof performance of the single battery can be further improved. Specifically, when the insulating film 100 is used to coat the housing 200, the extension region 114 is adhered to the side turning position of the housing 200 and extends along the height direction of the housing 200, so that the waterproof distance of the insulating film 100 to the side turning position of the housing 200 along the height direction of the housing 200 can be extended, and the waterproof effect can be enhanced.
Optionally, the length of the extension region 114 is greater than the length of the second region 112 along the length direction of the insulating film 100, so as to increase the sealing length of the extension region 114 at the side turning position of the housing 200 of the single battery, and enhance the waterproof effect. Optionally, the width of the extension region 114 is greater than the width of the second region 112 along the width direction of the insulating film 100, so as to increase the pasting area of the extension region 114 and improve the pasting effect.
As shown in fig. 2 to 4, in some embodiments of the present application, the extension region 114 includes a first extension region 1141 and a second extension region 1142, and the first extension region 1141 and the second extension region 1142 are disposed at an interval in a width direction of the insulating film 100; when the second region 112, the first region 111 and the third region 113 are sequentially overlapped, a part of the adhesive layer at the bent position of the first region 111 is adhered to a part of the adhesive layer of the first extension region 1141, and a part of the adhesive layer at the bent position of the third region 113 is adhered to a part of the adhesive layer of the second extension region 1142. The first extension region 1141 and the second extension region 1142 are disposed along the width direction of the insulating film 100 at an interval, so that the first extension region 1141 and the second extension region 1142 form a gap, which can reduce the area of the non-turning position of the extension region 114 on the side surface of the housing 200, thereby saving the manufacturing cost of the insulating film 100; meanwhile, when the case 200 is coated with the insulating film 100, an enveloping person can stick the second section 112 and the extension section 114 to the side of the case 200 by pinching the first extension section 1141 and the second extension section 1142 with both hands, respectively, so that the enveloping operation is more convenient.
Alternatively, the lengths of the first and second extension regions 1141 and 1142 may be set to 1mm to 50mm along the length direction of the insulating film 100 to accommodate the cases 200 of the unit cells of different sizes. Alternatively, the widths of the first and second extension regions 1141 and 1142 may be set to 5mm to 30mm in the width direction of the insulating film 100 to accommodate the cases 200 of the unit cells of different sizes.
As shown in fig. 2, in some embodiments of the present application, two first crease lines 101 extending along a width direction of the insulating film 100 are disposed on the insulating film 100, the two first crease lines 101 divide the insulating film 100 into a first stacked region 110, a second stacked region 120 and a cladding region 130, and the first stacked region 110, the cladding region 130 and the second stacked region 120 are sequentially disposed along a length direction of the insulating film 100; the first lamination area 110 and/or the second lamination area 120 includes the first area 111, the second area 112, the third area 113, and the extension area 114, that is, both the first lamination area 110 and the second lamination area 120 may include the first area 111, the second area 112, the third area 113, and the extension area 114, or only the first lamination area 110 or the second lamination area 120 may include the first area 111, the second area 112, the third area 113, and the extension area 114. By providing the two first crease lines 101 with the above structure, when the housing 200 of the single battery is covered, the insulating film 100 can be folded along the two first crease lines 101 to quickly separate the insulating film 100 into the first stacked region 110, the second stacked region 120 and the covering region 130, so as to cover the corresponding region of the housing 200, thereby improving the efficiency of covering.
Alternatively, as shown in fig. 2, at least one end of the insulating film 100 is provided with two oblique crease lines 102 along the length direction of the insulating film 100, the included angle of the two oblique crease lines 102 is 90 ° to 120 °, and the two oblique crease lines 102 separate the end of the insulating film 100 into a first region 111, a second region 112, and a third region 113. By providing the two oblique crease lines 102 with the above structure, when the housing 200 of the single battery is covered, the insulating film 100 can be folded along the two oblique crease lines 102 to quickly separate the end of the insulating film 100 into the first region 111, the second region 112 and the third region 113, so as to correspondingly cover the side surface of the housing 200, thereby improving the covering efficiency. Preferably, two oblique crease lines 102 are respectively disposed at two ends of the insulating film 100 along the length direction thereof, and the first folding region 110 and the second folding region 120 are symmetrically disposed, so as to facilitate processing and save manufacturing cost.
Alternatively, as shown in fig. 3, two second crease lines 103 extending along the length direction of the insulative film 100 are disposed on the insulative film 100, the two second crease lines 103 divide the cladding region 130 into a first cladding region 131, a second cladding region 132, and a third cladding region 133, and the first cladding region 131, the second cladding region 132, and the third cladding region 133 are sequentially disposed along the width direction of the insulative film 100. By providing the two second crease lines 103 with the above structure, when the housing 200 of the single battery is coated, the insulating film 100 can be folded along the two second crease lines 103 to quickly separate the coating region 130 of the insulating film 100 into the first coating region 131, the second coating region 132 and the third coating region 133, so as to correspondingly coat the bottom surface 210 and the two first side surfaces 220 of the housing 200, thereby improving the coating efficiency.
Alternatively, as shown in fig. 4, the first lamination area 110 and the second lamination area 120 are each provided with two third crease lines 104 extending in the length direction of the insulating film 100, and the two third crease lines 104 each pass through the second area 112 and the extension area 114; one of the third crease lines 104 is collinear with one of the second crease lines 103, and the other third crease line 104 is collinear with the other second crease line 103. By providing the third folding line 104 having the above-described structure, when the case 200 of the single battery is coated, the third folding line 104 can be aligned with the side folding position of the case 200 for positioning, so that the first folding region 110 and the second folding region 120 are prevented from being attached to each other, and the coating efficiency is improved.
As shown in fig. 5 to 8, the single battery includes a case 200 and the insulating film 100 provided in the embodiment of the present application, and the insulating film 100 is wrapped on the case 200. Through adopting the insulating film 100 cladding that this application embodiment provided on casing 200, realize the cladding and the sealed effect of reinforcing to casing 200, can prevent that moisture in the environment from getting into between insulating film 100 and the casing 200, improve battery cell's waterproof performance, and then improve battery cell's safety in utilization.
Specifically, as shown in fig. 5, the housing 200 includes a bottom surface 210, two first side surfaces 220 and two second side surfaces 230, the two first side surfaces 220 and the two second side surfaces 230 are alternately connected, the two first side surfaces 220 are oppositely disposed, the two second side surfaces 230 are oppositely disposed, and the bottom surface 210 is connected to both the two first side surfaces 220 and the two second side surfaces 230. When the insulating film 100 is used for coating the shell 200, the first coating region 131 of the insulating film 100 is coated on the bottom surface 210, the second coating region 132 and the third coating region 133 are coated on the two first side surfaces 220 respectively, the second region 112, the first region 111 and the third region 113 of the first lamination region 110 are sequentially laminated on one second side surface 230, the second region 112, the first region 111 and the third region 113 of the second lamination region 120 are sequentially laminated on the other second side surface 230, and a part of the bonding layer at the bending position of the first region 111 and a part of the bonding layer at the bending position of the third region 113 are bonded with a part of the bonding layer of the extension region 114 respectively; the first region 111, the second region 112, the third region 113 and the extension region 114 of the first lamination region 110 are welded (i.e., welded) together, and the first region 111, the second region 112, the third region 113 and the extension region 114 of the second lamination region 120 are welded together to seal a passage for moisture to enter, so that the insulation film 100 covers the shell 200 and enhance the sealing effect, moisture in the environment can be prevented from entering between the insulation film 100 and the shell 200, the waterproof performance of the single battery is improved, and the use safety of the single battery is further improved.
The overall process of coating the housing 200 with the insulating film 100 is described below with reference to fig. 6 to 8:
step A, coating the first coating region 131 of the insulating film 100 on the bottom surface 210 of the housing 200;
step B, as shown in fig. 6, folding the insulating film 100 along the two second folding lines 103, respectively, and respectively coating the second coating region 132 and the third coating region 133 on the two first side surfaces 220 of the housing 200;
step C, as shown in fig. 7, for one of the second side surfaces 230 of the housing 200, folding the insulating film 100 along the first crease line 101 near the first folding area 110, and simultaneously folding the first folding area 110 along the two oblique crease lines 102 thereon, respectively, so as to attach the second area 112, the first extending area 1141, and the second extending area 1142 to the second side surface 230;
step D, as shown in fig. 8, first, the third region 113 of the first folding region 110 is turned over along the first crease line 101 to be attached to the second side surface 230, then the first region 111 of the first folding region 110 is turned over along the first crease line 101 to be attached to the first region 111 and the third region 113, and finally, the overlapping regions of the first region 111, the second region 112, the third region 113, the first extension region 1141 and the second extension region 1142 of the first folding region 110 are welded to realize the wrapping of one of the second side surfaces 230 by the first folding region 110 of the insulating film 100;
step E, referring to steps C and D, the coating of the second folding region 120 of the insulating film 100 on the other second side surface 230 is realized, and the coating processes of the two second side surfaces 230 can be performed simultaneously, and finally, the complete coating of the housing 200 is realized.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
In the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of indicated technical features is significant. Thus, features defined as "first," "second," etc. may explicitly or implicitly include one or more features.
The insulating film and the single battery provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. An insulating film for covering a case (200) of a unit cell, characterized in that the insulating film comprises a base material and an adhesive layer, the adhesive layer being located on one side of the base material;
at least one end of the insulating film is provided with a first region (111), a second region (112) and a third region (113) along the length direction of the insulating film, the first region (111), the second region (112) and the third region (113) are sequentially arranged along the width direction of the insulating film, and one side edge of the second region (112) far away from the middle part of the insulating film is also provided with an extension region (114);
the first area (111), the second area (112), the third area (113) and the extension area (114) can be bent, so that the second area (112), the first area (111) and the third area (113) are sequentially stacked, and the bonding layer at the bending position of the first area (111) and/or the bonding layer at the bending position of the third area (113) are bonded with the bonding layer at the extension area (114) respectively, so that a stacked structure which can be bonded with the side face of the shell (200) is formed.
2. The insulating film of claim 1, wherein the length of the extension region (114) is greater than the length of the second region (112) along the length direction of the insulating film; and/or the width of the extension region (114) is greater than the width of the second region (112) in the width direction of the insulating film.
3. The insulating film of claim 1, wherein the extension region (114) comprises a first extension region (1141) and a second extension region (1142), the first extension region (1141) and the second extension region (1142) being spaced apart in a width direction of the insulating film;
when the second region (112), the first region (111) and the third region (113) are overlapped in sequence, part of the adhesive layer at the bending position of the first region (111) is adhered to part of the adhesive layer of the first extension region (1141), and part of the adhesive layer at the bending position of the third region (113) is adhered to part of the adhesive layer of the second extension region (1142).
4. The insulating film according to claim 3, wherein the first extension region (1141) and the second extension region (1142) each have a length of 1mm to 50mm in a length direction of the insulating film.
5. The insulating film according to claim 3, wherein the first extension region (1141) and the second extension region (1142) each have a width of 5mm to 30mm in a width direction of the insulating film.
6. The insulating film according to any one of claims 1 to 5, wherein the insulating film is provided with two first crease lines (101) extending in a width direction of the insulating film, the two first crease lines (101) separating the insulating film into a first stacked region (110), a second stacked region (120), and a cladding region (130), the first stacked region (110), the cladding region (130), and the second stacked region (120) being arranged in this order in a length direction of the insulating film;
the first and/or second stacked region (110, 120) comprises the first region (111), the second region (112), the third region (113) and the extension region (114).
7. The insulating film according to claim 6, wherein at least one end of the insulating film is provided with two oblique crease lines (102) along a length direction of the insulating film, an included angle of the two oblique crease lines (102) is 90-120 °, and the two oblique crease lines (102) separate an end of the insulating film from the first region (111), the second region (112) and the third region (113).
8. The insulating film according to claim 6, wherein two second crease lines (103) extending in a length direction of the insulating film are provided on the insulating film, the two second crease lines (103) divide the cladding region (130) into a first cladding region (131), a second cladding region (132), and a third cladding region (133), and the first cladding region (131), the second cladding region (132), and the third cladding region (133) are sequentially provided in a width direction of the insulating film.
9. The insulating film of claim 8, wherein the first and second laminating areas (110, 120) are each provided with two third crease lines (104) extending in the length direction of the insulating film, both third crease lines (104) passing through the second and extension areas (112, 114);
one of the third crease lines (104) is collinear with one of the second crease lines (103), and the other third crease line (104) is collinear with the other second crease line (103).
10. A battery cell, characterized in that it comprises a casing (200) and an insulating film according to any one of claims 1 to 9, said insulating film being coated on said casing (200).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221928874.XU CN218242200U (en) | 2022-07-22 | 2022-07-22 | Insulating film and single battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221928874.XU CN218242200U (en) | 2022-07-22 | 2022-07-22 | Insulating film and single battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914383A (en) * | 2023-06-26 | 2023-10-20 | 欣旺达动力科技股份有限公司 | Secondary battery and electricity utilization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914383A (en) * | 2023-06-26 | 2023-10-20 | 欣旺达动力科技股份有限公司 | Secondary battery and electricity utilization device |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518107 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |