Battery insulation sheet and battery

Abstract

The utility model relates to a battery insulating sheet and a battery. The battery insulation sheet comprises gummed paper, an ink layer and an oil coating layer, the gummed paper is of an integrated structure and comprises a plane material and a glue layer arranged on the plane material, and the glue layer is used for bonding a battery cell; the gummed paper comprises a silk-screen part, a connecting part, a sticking part, an ink layer, an oil coating layer and a pair of side parts; the connecting part is connected with the screen printing part and the pasting part, and the side parts are arranged on the two opposite sides of the pasting part; the ink layer is coated on one surface of the silk-screen part; the oil coating layer and the ink layer are located on the same face of the silk-screen part, and the oil coating layer covers the ink layer and the area, exposed out of the ink layer, of the silk-screen part. According to the scheme provided by the invention, the oil coating layer can be prevented from influencing the surface adhesive force of the sticking part, and the thickness of the battery occupied by the battery insulating sheet is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery insulating sheet and a battery. Background Art

[0002] There are generally two battery insulation solutions at present. The first is to set U-shaped PI material high-temperature adhesive tape on both sides of the battery cell, and a PET material label is attached to the front of the battery cell. The second is to wrap the main body of the battery cell with a PET material label. The labels used in both solutions are brief nameplates indicating the battery model, voltage, capacity, manufacturer and other information. In order to improve the texture of the label, the label is usually coated with oil. Specifically, a layer of varnish or matt oil is applied to the surface of the label to form an oil coating. The oil coating can protect the label from water and wear, and at the same time improve the brightness and texture of the label surface. In addition, the battery cell is usually fixed in the battery compartment of the whole machine by affixing double-sided tape on the back of the battery cell.

[0003] However, both solutions have the following problems: the surface adhesion of the PET label will decrease after oil coating, and it is easy to have insufficient stickiness when applying double-sided tape and then fixing it to the battery compartment; there will be white spots on the bottom of the battery cell and the top of the battery body. If the bottom and the top of the battery body are to be wrapped, additional high-temperature adhesive tape will be required to stick on the bottom and the top of the battery body, which will cause the aluminum-plastic film on the bottom and the top of the battery body to be scratched; there are multiple layers of adhesive tape in the thickness direction of the battery, and the battery size requirement of the final product will be larger. For the design of high-energy-density batteries, the capacity will be greatly affected and may be lower Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a battery insulating sheet and a battery, which can prevent the oil coating layer from affecting the surface adhesion of the adhesive portion and reduce the thickness of the battery occupied by the battery insulating sheet.

[0005] In a first aspect, the present application provides a battery insulating sheet comprising adhesive tape, an ink layer, and an oil coating layer;

[0006] The adhesive tape is an integral structure, including a surface material and a glue layer provided on the surface material, and the glue layer is used to bond the battery cell; the adhesive tape includes a silk screen portion, a connecting portion, an adhesive portion and a pair of side portions; the connecting portion is respectively connected to the silk screen portion and the adhesive portion, and the side portions are located on opposite sides of the adhesive portion; the ink layer is applied to one side of the silk screen portion, the oil covering layer and the ink layer are provided on the same side of the silk screen portion, and the oil covering layer covers the ink layer and the area of ​​the silk screen portion exposed outside the ink layer.

[0007] Furthermore, the adhesive tape also includes a first convex portion for covering the corner of the battery cell, the first convex portion is connected to the side portion, and the first convex portion is located on a side of the side portion close to the silk-screen portion.

[0008] Furthermore, the first convex portion is located on the outside of the connecting portion; a first gap is provided between the first convex portion and the connecting portion, and a width of the first gap gradually increases in a direction away from the side portion.

[0009] Furthermore, the connecting portion is square; and a side of the first convex portion facing away from the connecting portion gradually approaches the connecting portion in a direction away from the side portion.

[0010] Furthermore, the adhesive tape further includes a covering portion, and the covering portion is connected to a side of the adhesive portion away from the connecting portion.

[0011] Furthermore, the adhesive tape also includes a second protrusion for covering the corner of the battery cell, the second protrusion is connected to the side portion, the first protrusion is located on one side of the side portion, and the first protrusion is opposite to the covering portion.

[0012] Furthermore, the second convex portion is square; a second gap is provided between the covering portion and the second convex portion, and the width of the second gap gradually increases in a direction away from the adhesive portion.

[0013] Furthermore, the length L1 of the adhesive portion is 24 to 24.4 mm, the width W1 of the adhesive portion is 23.6 to 24 mm; and / or the width W2 of the silk-screen portion is 20.8 to 21.2 mm; and / or the thickness of the adhesive tape is 0.033 to 0.037 mm.

[0014] Furthermore, the adhesive tape is PI adhesive tape, and the adhesive tape also includes a release paper provided on the side of the glue layer away from the surface material.

[0015] A second aspect of the present application provides a battery, comprising a battery cell, wherein the battery cell is wrapped by the battery insulating sheet.

[0016] The technical solution provided by the present application may include the following beneficial effects: by adding an oil covering layer to the surface of the silk-screen part, the ink layer is protected from water and wear, and the brightness and texture of the ink layer are improved. No oil covering layer is added to the surface of the adhesive part, ensuring that the surface adhesion will not decrease when the adhesive part is attached to the battery compartment. The adhesive tape is an integrated structure, which can reduce the types of battery insulating sheet materials and simplify the assembly process, helping to reduce production costs and improve production efficiency. There is no need to add other adhesive tapes, which can reduce the space reserved for battery insulating films, allowing the battery cell to be thicker, thereby increasing the energy density of the battery cell.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0019] Figure 1 Schematic diagram of the structure of a battery insulation sheet shown in an embodiment of the present application;

[0020] Figure 2 It is a partial cross-sectional view of a battery insulation sheet shown in an embodiment of the present application.

[0021] Reference numerals: adhesive tape 1; release paper 1a; glue layer 1b; surface material 1c; ink layer 2; oil-covering layer 3; silk-screen portion 11; connecting portion 12; pasting portion 13; side portion 14; first convex portion 15; second convex portion 16; covering portion 17; first gap 18; second gap 19. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0023] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0025] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] In response to the above problems, embodiments of the present application provide a battery insulating sheet and a battery, which can prevent the oil coating from affecting the surface adhesion of the adhesive portion and reduce the thickness of the battery occupied by the battery insulating sheet.

[0027] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] Figure 1 Schematic diagram of the structure of a battery insulation sheet shown in an embodiment of the present application; Figure 2 It is a partial cross-sectional view of a battery insulation sheet shown in an embodiment of the present application.

[0029] See also Figure 1 and Figure 2 The battery insulating sheet includes adhesive tape 1, an ink layer 2 and an oil coating layer 3. The adhesive tape 1 is an integrated structure. The adhesive tape 1 includes a surface material 1c and a glue layer 1b provided on the surface material 1c. The glue layer 1b is used to bond the battery cell. The adhesive tape 1 can be pasted and wrapped around the battery cell through the glue layer 1b. The adhesive tape 1 includes a silk screen portion 11, a connecting portion 12, an adhesive portion 13 and a pair of side portions 14. The connecting portion 12 is respectively connected to the silk screen portion 11 and the adhesive portion 13. The connecting portion 12 can be attached to the bottom end of the battery cell to protect the bottom end of the battery cell. The side portions 14 are located on opposite sides of the adhesive portion 13. The side portions 14 can be attached to opposite sides of the battery cell. The side of the adhesive portion 13 facing away from the glue layer 1b can be attached to the battery compartment of the electrical appliance by glue.

[0030] Ink layer 2 is applied to one side of the silk-screen portion 11. Ink layer 2 is sprayed onto the surface of silk-screen portion 11 using a sprayer. Ink layer 2 can display information such as the battery cell model, voltage, capacity, and manufacturer. An oil cover layer 3 is located on the same side of silk-screen portion 11 as ink layer 2. Oil cover layer 3 covers both ink layer 2 and the area of ​​silk-screen portion 11 exposed outside ink layer 2. Specifically, oil cover layer 3 is larger in area than ink layer 2 and completely covers the side of ink layer 2 facing away from silk-screen portion 11. The side of silk-screen portion 11 connected to ink layer 2 is also covered by oil cover 3, placing ink layer 2 between oil cover layer 3 and silk-screen portion 11.

[0031] The present application adds an oil covering layer 3 to the surface of the silk-screen portion 11, thereby providing waterproof and wear-resistant protection to the ink layer 2, while improving the brightness and texture of the ink layer 2. The oil covering layer 3 is not added to the surface of the adhesive portion 13, ensuring that the surface adhesion of the adhesive portion 13 will not decrease when it is attached to the battery compartment. The adhesive tape 1 is an integrated structure, which can reduce the types of battery insulating sheet materials and simplify the assembly process, helping to reduce production costs and improve production efficiency. There is no need to add other adhesive tapes, which can reduce the space reserved for battery insulating films, allowing the battery cell to be thicker, thereby increasing the energy density of the battery cell.

[0032] See also Figure 1 and Figure 2 The adhesive tape 1 also includes a first protrusion 15, which is used to cover the corners of the battery cell. The first protrusion 15 is connected to the side portion 14 and is located on the side of the side portion 14 near the silk screen portion 11. When the connecting portion 12 is attached to the bottom end of the battery cell and the side portion 14 is attached to the side of the battery cell, the first protrusion 15 can be folded toward the bottom end of the battery cell, so that the first protrusion 15 is attached through the adhesive layer 1b and covers the corners of the bottom end of the battery cell. The first protrusion 15 can cover the gap between the connecting portion 12 and the bottom end of the battery cell, covering the area where the bottom end of the battery cell is not attached to the connecting portion 12, thereby ensuring that the battery cell is fully wrapped. The first protrusion 15 is located on the outside of the connecting portion 12. The first protrusion 15 is trapezoidal. There is a first gap 18 between the first protrusion 15 and the connecting portion 12. The width of the first gap 18 gradually increases in the direction away from the side portion 14. The first gap 18 can prevent the first protrusion 15 from interfering with the silk-screen portion 11 or the adhesive portion 13 when covering the corner of the bottom end of the battery cell.

[0033] See also Figure 1 and Figure 2 The adhesive tape 1 further includes a covering portion 17, which is connected to the side of the adhesive portion 13 away from the connecting portion 12. One side of the covering portion 17 is provided with an adhesive layer, and the covering portion 17 can be pasted and covered on the top of the battery cell through the glue layer 1b, thereby fully wrapping the battery cell.

[0034] See also Figure 1 and Figure 2The adhesive tape 1 also includes a second protrusion 16, which is used to cover the corners of the battery cell. The second protrusion 16 is connected to the side portion 14, and the first protrusion 15 is located on one side of the side portion 14, and the first protrusion 15 is opposite the covering portion 17. When the connecting portion 12 is attached to the bottom of the battery cell and the side portion 14 is attached to the side of the battery cell, the second protrusion 16 can be folded toward the top of the battery cell, so that the second protrusion 16 is attached to the top of the battery cell through the adhesive layer 1b. The second protrusion 16 can cover the gap between the covering portion 17 and the top of the battery cell, covering the area of ​​the top of the battery cell that is not attached to the covering portion 17, thereby ensuring that the battery cell is fully covered. The second protrusion 16 is square in shape, and a second gap 19 is formed between the covering portion 17 and the second protrusion 16. The width of the second gap 19 gradually increases in the direction away from the adhesive portion 13. The second gap 19 prevents the second protrusion 16 from interfering with the silk screen portion 11 or the adhesive portion 13 when covering the corners of the battery cell.

[0035] See also Figure 1 , the width W3 of the second protrusion 16 is 1.8~2.2mm, preferably, the width W3 of the second protrusion 16 is 2mm. The length L1 of the adhesive portion 13 is 24~24.4mm, and the width W1 of the adhesive portion 13 is 23.6~24mm, ensuring that the adhesive portion 13 can cover the entire back of the battery cell. The width W2 of the silk screen portion 11 is 20.8~21.2mm, ensuring that the silk screen portion 11 has enough space to print various battery cell information. The thickness of the silk screen portion 11 is 0.033~0.037mm, and the thickness of the adhesive portion 13 is 0.033~0.037mm. Correspondingly, the thickness of the side portion 14, the first protrusion 15, the second protrusion 16, the connecting portion 12 and the covering portion 17 are all 0.033~0.037mm.

[0036] See also Figure 1 and Figure 2 Adhesive tape 1 is PI adhesive tape and also includes release paper 1a, which is placed on the side of adhesive layer 1b facing away from surface material 1c. Release paper 1a protects adhesive layer 1b. Before the battery insulating sheet is attached to the battery cell, release paper 1a prevents adhesive layer 1b from losing its adhesiveness and prevents adhesive layer 1b from sticking to objects other than the battery cell.

[0037] Corresponding to the aforementioned embodiment of the application function implementation device, the present application also provides a battery and corresponding embodiments.

[0038] See also Figure 1 and Figure 2The battery includes a battery cell, a battery insulating sheet wrapped around the battery cell, the battery cell is square, the silk screen portion 11 is attached to one side of the battery cell through an adhesive layer, the adhesive portion 13 is attached to the side of the battery cell facing away from the silk screen portion 11 through a glue layer 1b, the oil covering layer 3 is located on the side of the silk screen portion 11 facing away from the battery cell, the side portion 14 is attached to two opposite side surfaces of the battery cell through a glue layer 1b, the connecting portion 12 is attached to the bottom surface of the battery cell through a glue layer 1b, and the covering portion 17 is attached to the top surface of the battery cell through a glue layer 1b, so that the battery insulating sheet can surround the six sides of the battery cell.

[0039] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description are not necessarily required for this application. In addition, it is understood that the steps in the method of the embodiment of the present application can be adjusted in sequence, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0040] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery insulating sheet, characterized in that: Including adhesive paper, ink layer and oil cover layer; The adhesive tape is an integrated structure, comprising a surface material and a glue layer provided on the surface material, wherein the glue layer is used to bond the battery core; The adhesive tape includes a screen printing portion, a connecting portion, an adhesive portion, and a pair of side portions; the connecting portion is connected to the screen printing portion and the adhesive portion, respectively, and the side portions are located on opposite sides of the adhesive portion; The ink layer is applied to one side of the silk-screen portion; The oil covering layer and the ink layer are provided on the same surface of the silk-screen portion, and the oil covering layer covers the ink layer and the area of ​​the silk-screen portion exposed outside the ink layer.

2. The battery insulation sheet according to claim 1, characterized in that: The adhesive tape further includes a first convex portion for covering a corner of the battery cell, wherein the first convex portion is connected to the side portion, and the first convex portion is located on a side of the side portion close to the silk-screen portion.

3. The battery insulation sheet according to claim 2, characterized in that: The first convex portion is located on the outer side of the connecting portion; a first gap is defined between the first convex portion and the connecting portion, and a width of the first gap gradually increases in a direction away from the side portion.

4. The battery insulation sheet according to claim 3, characterized in that: The connecting portion is square in shape; a side of the first convex portion facing away from the connecting portion gradually approaches the connecting portion in a direction away from the side portion.

5. The battery insulation sheet according to claim 2, characterized in that: The adhesive tape further includes a covering portion connected to a side of the adhesive portion away from the connecting portion.

6. The battery insulation sheet according to claim 5, characterized in that: The adhesive tape further includes a second convex portion for covering a corner of the battery cell, the second convex portion is connected to the side portion, the first convex portion is located on one side of the side portion, and the first convex portion is opposite to the covering portion.

7. The battery insulation sheet according to claim 6, characterized in that: The second convex portion is square; a second gap is provided between the covering portion and the second convex portion, and the width of the second gap gradually increases in a direction away from the adhesive portion.

8. The battery insulation sheet according to claim 1, characterized in that: The length L1 of the adhesive portion is 24 to 24.4 mm, and the width W1 of the adhesive portion is 23.6 to 24 mm; and / or the width W2 of the silk-screen portion is 20.8 to 21.2 mm; and / or, The thickness of the adhesive tape is 0.033-0.037 mm.

9. The battery insulation sheet according to claim 1, characterized in that: The adhesive tape is PI adhesive tape; The adhesive tape further comprises a release paper arranged on a side of the adhesive layer facing away from the surface material.

10. A battery, characterized in that: The invention comprises a battery core, wherein the battery core is wrapped by the battery insulating sheet according to any one of claims 1 to 9.

Images