Insulating sheet and battery
By setting small areas of heterochromatic or hollow marks on the insulating sheet and using CCD equipment for precise positioning, the problem of heterochromatic pigment precipitation in the battery production process is solved, and the insulation effect and positioning accuracy are improved.
Patent Information
- Application Number
- CN202422185479.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-05
AI Technical Summary
In the prior art, the large area of heterochromatic pigment marks used in the battery production process are prone to precipitation in the electrolyte, causing adverse reactions.
Design an insulating sheet with a marking area occupancy ratio of less than or equal to 50%. Use different color marks or hollow marks to accurately locate them through CCD equipment to reduce the use of different color pigments or avoid their precipitation.
Effectively reduce or avoid the precipitation of heterochromatic pigments in the electrolyte, reduce the occurrence of adverse reactions, and ensure insulation effect and precise positioning.
Smart Images
Figure CN223273480U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery technology, and more specifically, to an insulating sheet and a battery. Background Art
[0002] Insulating sheets are usually used inside the battery to isolate and insulate the battery cells from the battery casing to prevent short circuits caused by contact between the battery cells and the casing. In related technologies, insulating sheets are usually cut and formed from polymer rolls. During the battery production process, the polymer rolls are cut and formed while being attached and wrapped around the battery cells; during the attachment process, a device with a charge coupled device (CCD) is used to detect and locate the marks on the polymer rolls so that the insulating sheets can be attached accurately. In order to facilitate the grasping and detection of the CCD equipment, the marks on the polymer rolls are usually set to a very large area, and the marks are usually coated with a pigment of a different color from the insulating sheet itself. Pigments with a large area and a large weight are easy to precipitate in the battery electrolyte, causing other adverse reactions. Utility Model Content
[0003] The purpose of the embodiments of the present application is to provide an insulating sheet and a battery that greatly reduces the use of heterochromatic pigments, or even avoids the use of heterochromatic pigments, thereby greatly reducing or avoiding adverse reactions caused by the precipitation of heterochromatic pigments in the electrolyte of the battery.
[0004] In a first aspect, an embodiment of the present application provides an insulating sheet for insulating a battery cell and a battery shell, wherein the insulating sheet extends along a first direction, and a mark is continuously or discontinuously provided on at least one side of the insulating sheet along the first direction, and the insulating sheet is wrapped around the battery cell with the side exposing the mark as the outer side, wherein the area ratio occupied by the mark on one side of the insulating sheet is less than or equal to 50%.
[0005] In one embodiment, the area ratio of the mark on one side of the insulating sheet is less than or equal to 10%.
[0006] In one embodiment, the mark includes at least one linear and / or curved different-color mark, and the different-color marks are continuously arranged along the first direction.
[0007] In one embodiment, a width of the different-color mark along a second direction is k, 0.1 mm ≤ k ≤ 4 mm, wherein the second direction intersects the first direction.
[0008] In one embodiment, the mark includes a plurality of marks of different colors, and the plurality of marks of different colors are arranged in at least one row at intervals along the first direction.
[0009] In one embodiment, the area of each of the different color marks is S k, 2mm 2 ≤S k ≤16mm 2 ;
[0010] and / or, the shape of the heterochromatic mark includes at least one of a circle, an ellipse, a triangle, a quadrilateral, a pentagon or a hexagon;
[0011] and / or, the distance between two adjacent different-color marks along the first direction is g, g ≥ 1 mm;
[0012] And / or, a distance between the different-color mark and the edge of the insulating sheet along a second direction is h, 0 mm ≤ h ≤ 6 mm, and the second direction intersects with the first direction.
[0013] In one embodiment, the mark includes a plurality of hollow marks, and the plurality of hollow marks are arranged in at least one row at intervals along the first direction.
[0014] In one embodiment, the area of each hollow mark is S k , 2mm 2 ≤S k ≤16mm 2 ;
[0015] And / or, the shape of the hollow mark includes at least one of a circle, an ellipse, a triangle, a quadrilateral, a pentagon or a hexagon;
[0016] and / or, the distance between two adjacent hollow marks along the first direction is g, g ≥ 1 mm;
[0017] And / or, a distance between the hollow mark and the edge of the insulating sheet along a second direction is h, 0mm≤h≤6mm, and the second direction intersects with the first direction.
[0018] In one embodiment, the thickness of the insulating sheet is 0.01 mm to 1.0 mm.
[0019] In a second aspect, an embodiment of the present application further provides a battery, comprising a shell, a battery cell and any of the above-mentioned insulating sheets, wherein the shell has a accommodating cavity, the battery cell and the insulating sheet are both arranged in the accommodating cavity, wherein the insulating sheet is arranged between the battery cell and the shell, and the insulating sheet wraps the side of the battery cell.
[0020] The insulating sheet provided by the embodiments of the present application has the following beneficial effects: compared with the related art, at least one side of the insulating sheet of the present application is continuously or intermittently provided with a mark along a first direction, and the insulating sheet is wrapped around the battery cell with the side where the mark is exposed as the outer side; wherein, the area occupied by the mark on one side of the insulating sheet is less than or equal to 50%; providing the mark on the insulating sheet can facilitate the CCD device to accurately position the insulating sheet during attachment by grabbing the mark, reducing the possibility of attachment offset; when the mark is formed by a different color pigment, providing the mark on the surface of the insulating sheet with an area occupied by less than or equal to 50% can greatly reduce the use of different color pigment, thereby reducing the precipitation of different color pigment in the battery electrolyte, and further reducing the reaction of the different color pigment with substances in the electrolyte; if the mark does not use different color pigment, the precipitation and adverse reactions of the different color pigment are directly avoided, and the small area occupied by the mark can also ensure the insulation area and insulation effect. The embodiments of the present application also provide a battery including the insulating sheet of the present application, which has the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0022] Figure 1 A schematic structural diagram of an insulating sheet provided in the first embodiment of the present application;
[0023] Figure 2 A schematic structural diagram of an insulating sheet provided in a second embodiment of the present application;
[0024] Figure 3 A schematic structural diagram of an insulating sheet provided in a third embodiment of the present application;
[0025] Figure 4 A schematic structural diagram of an insulating sheet provided in a fourth embodiment of the present application;
[0026] Figure 5 A schematic structural diagram of an insulating sheet provided in a fifth embodiment of the present application;
[0027] Figure 6 A schematic structural diagram of an insulating sheet provided in a sixth embodiment of the present application;
[0028] Figure 7 A schematic structural diagram of an insulating sheet provided in a seventh embodiment of the present application;
[0029] Figure 8 A schematic structural diagram of a battery provided in an eighth embodiment of the present application;
[0030] Among them, the reference numerals in the figures are:
[0031] Battery 100 ; insulating sheet 10 ; battery cell 20 ; housing 30 ; mark M; different color mark M1 ; hollow mark M2 ; first direction X; second direction Y. DETAILED DESCRIPTION
[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0033] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0034] 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.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0036] Please also refer to Figures 1 to 7 The insulating sheet 10 provided in the embodiment of the present application is now described. The insulating sheet 10 of the present application is used to insulate the battery cells and the battery casing. The insulating sheet 10 is used to wrap the sides and bottom of the battery cells to separate the battery cells from the battery casing and prevent short circuits.
[0037] The insulating sheet 10 extends along a first direction X, and a mark M is continuously or intermittently provided on at least one side of the insulating sheet 10 along the first direction X. The insulating sheet 10 is wrapped around the side and bottom surfaces of the battery cell, with the side where the mark M is exposed as the outer side. The mark M occupies less than or equal to 50% of the area on one side of the insulating sheet 10. For example, the mark M occupies 50%, 45%, 40%, 30%, 20%, 15%, 10%, or 5% of the area on one side of the insulating sheet 10.
[0038] Optionally, the thickness of the insulating sheet is 0.01 mm to 1.0 mm, thereby ensuring the insulation effect while reducing the thickness of the insulating sheet.
[0039] The insulating sheet 10 provided in the embodiment of the present application is provided with a mark M on the insulating sheet 10, which can facilitate the CCD device to accurately position the insulating sheet 10 by grabbing the mark M during the attachment process, thereby reducing the possibility of attachment deviation; when the mark M is formed by a heterochromatic pigment, the mark M is set to occupy an area ratio of less than or equal to 50% on the surface of the insulating sheet 10, which can greatly reduce the use of the heterochromatic pigment, thereby reducing the precipitation of the heterochromatic pigment in the electrolyte of the battery, and further reducing the reaction between the heterochromatic pigment and substances in the electrolyte; if the mark M does not use a heterochromatic pigment, the precipitation and adverse reactions of the heterochromatic pigment are directly avoided, and the small area ratio of the mark M can also ensure the insulation area and insulation effect.
[0040] It should be noted that when the insulating sheet 10 is attached to the surface of the battery cell, it is sequentially attached to one side surface, the bottom surface, and the other side surface of the battery cell along the first direction X. The marks M provided along the first direction X can be grasped and positioned as the insulating sheet 10 is attached, thereby performing deflection analysis. It is understood that when the insulating sheet 10 is attached to the second side surface and the third side surface, it is also attached along the first direction X.
[0041] Furthermore, the area ratio of the mark M on one side of the insulating sheet 10 is less than or equal to 10%. In the present application, the mark M includes a different color mark M1 and / or a hollow mark M2. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the mark M is the heterochromatic mark M1. Figure 5 、 Figure 6 and Figure 7 , mark M is the hollow mark M2.
[0042] The color-coded marking M1 refers to a marking M formed using a pigment with a different color than the insulating sheet itself. In the first, second, third, and fourth embodiments, the insulating sheet itself is made of transparent polyethylene terephthalate (PET); the color-coded marking M1 is formed by coating with phthalocyanine blue and is blue. When the marking M includes the color-coded marking M1, the smaller the area occupied by the color-coded marking M1 on one side of the insulating sheet 10, the less likely the color-coded marking M1 will precipitate. Therefore, setting the area occupied by the marking M on one side of the insulating sheet 10 to less than or equal to 10% can further reduce the precipitation of the color-coded marking M1 in the electrolyte. Furthermore, phthalocyanine blue has a low solubility in the electrolyte, making it less likely to precipitate and react with the electrolyte. Using phthalocyanine blue coating to form the color-coded marking M1 further reduces the possibility of the color-coded marking M1 precipitating and any adverse reactions with the electrolyte.
[0043] When the mark M is a hollow mark M2, the potential for precipitation and adverse reactions in the electrolyte caused by the use of heterochromatic pigments is avoided. Furthermore, since the mark M is a hollow mark M2, setting the area occupied by the mark M on one side of the insulating sheet 10 to be less than or equal to 10% can reduce the area of the hollow mark M2, thereby ensuring that the insulating sheet itself has sufficient area for insulation, thereby maintaining the insulation area and insulation effect.
[0044] Optional, such as Figure 1 As shown, in the first embodiment of the present application, the mark M includes at least one different-color mark M1, and the different-color mark M1 is continuously arranged along the first direction X. Optionally, the different-color mark M1 is a straight line. Optionally, the different-color mark M1 includes two, which are respectively arranged on both sides of the insulating sheet body in the first direction X. It can be understood that when attached, the width of the insulating sheet 10 required for the battery cell may be slightly smaller than the width of the insulating sheet 10 coil itself. It should be noted that, in the present application, the length of the insulating sheet 10 is the length of the insulating sheet 10 in the first direction X, and the width of the insulating sheet 10 is the length of the insulating sheet 10 in the second direction Y, wherein the first direction X and the second direction Y are arranged to intersect. The CCD device can only Figure 1 Grab the left straight line color mark M1, or only Figure 1 The right linear color mark M1 is grasped to facilitate the attachment and cutting of the insulating sheet 10. Optionally, when the width of the insulating sheet 10 is adapted to the width of the battery cell, the CCD device can also grasp and position the left and right linear color marks M1 simultaneously, thereby further improving the accuracy of attachment and preventing deviation.
[0045] Optionally, in the second embodiment, the mark M includes a curved heterochromatic mark M1, such as Figure 2As shown. The different-color mark M1 can be arranged on either the left or right side of the insulating sheet body, extending along the first direction X. In other embodiments, the different-color mark M1 includes two curved different-color marks M1, one on each side of the insulating sheet body in the first direction X. Optionally, in some embodiments, the different-color mark M1 includes one linear different-color mark M1 and one curved different-color mark M1. As long as the area of the different-color mark M1 is small and can be detected by a CCD device, it is sufficient.
[0046] like Figure 1 As shown, in this first embodiment, the width of the heterochromatic mark M1 along the second direction Y is k. Here, 0.1mm≤k≤4mm. It is understandable that if the width k of the heterochromatic mark M1 in the second direction Y is too small, the CCD device will not be able to capture the heterochromatic mark M1, resulting in positioning failure; if the width k of the heterochromatic mark M1 is too large, the area of the heterochromatic mark M1 will be too large, and more pigment will be used to form the heterochromatic mark M1. As a result, the heterochromatic pigment in the battery after molding is easily precipitated in the electrolyte, causing adverse reactions. Setting 0.1mm≤k≤4mm allows the CCD device to capture and grasp the heterochromatic mark M1, while reducing the possibility of the heterochromatic pigment in the battery after molding being precipitated in the electrolyte, thereby reducing the possibility of causing adverse reactions. Optionally, k = 0.1mm, 0.3mm, 0.5mm, 0.6mm, 1mm, 2mm, 3mm, or 4mm, etc.
[0047] Likewise, in the second embodiment, the width k of the different-color mark M1 along the second direction Y ranges from 0.1 mm to 4 mm.
[0048] In some embodiments, the mark M includes a plurality of different-color marks M1, which are arranged in rows along the first direction X at intervals. This allows the CCD device to capture and analyze the polarization along the first direction X when the insulating sheet 10 is attached to the battery cell along the first direction X. Optionally, the plurality of different-color marks M1 are arranged in one, two, or three rows along the first direction X.
[0049] See also Figure 3 and Figure 4 , Figure 3 The insulating sheet 10 provided in the third embodiment of the present application; Figure 4 This is the insulating sheet 10 provided in the fourth embodiment of the present application.
[0050] In the third embodiment, a plurality of different color marks M1 are arranged in a row along the first direction X, such as Figure 3As shown. Optionally, multiple different color marks M1 are arranged in a straight line or a curve along the first direction X, or in a combination of a straight line and a curve. Setting multiple point-shaped different color marks M1 can greatly reduce the area of the mark M on the insulating sheet 10 while meeting the CCD device capture conditions, and greatly reduce the possibility of different color pigments precipitating in the electrolyte. Optionally, the area of each different color mark M1 is S k , of which 2mm 2 ≤S k ≤16mm 2 It can be understood that the area S of each heterochromatic mark M1 k If it is too small, the CCD device cannot capture the heterochromatic mark M1, resulting in positioning failure; the area S of the heterochromatic mark M1 k If it is too large, the area of the color mark M1 will be too large, and more pigment will be used to form the color mark M1, so the color pigment in the battery after molding will easily precipitate in the electrolyte, causing adverse reactions. Set 2mm 2 ≤S k ≤16mm 2 This allows the CCD device to capture and grasp the heterochromatic mark M1, while reducing the possibility of heterochromatic pigments in the formed battery being precipitated in the electrolyte, thereby reducing the possibility of causing adverse reactions.
[0051] Optionally, the shape of the heterochromatic marks M1 includes at least one of a circle, an ellipse, a triangle, a quadrilateral, a pentagon, or a hexagon. In this third embodiment, the shapes of the multiple heterochromatic marks M1 are all circular. Alternatively, in other embodiments, the shapes of the multiple heterochromatic marks M1 may all be elliptical, triangular, quadrilateral, pentagonal, or hexagonal. The shapes of the multiple heterochromatic marks M1 may also be other, as long as the CCD device can capture the heterochromatic marks M1.
[0052] Optionally, the spacing between two adjacent heterochromatic marks M1 along the first direction X is g, where g ≥ 1 mm. For example, g is 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm, etc. On the one hand, g ≥ 1 mm facilitates the positioning, coating, and formation of multiple dot-shaped heterochromatic marks M1 on the insulating sheet body. If g is too small, the position determination of the multiple dot-shaped heterochromatic marks M1 may deviate, reducing the accuracy of setting the heterochromatic marks M1 on the insulating sheet body. In addition, if g is too small, two adjacent heterochromatic marks M1 may overlap and become connected. On the other hand, g ≥ 1 mm can reduce the area occupied by the heterochromatic marks M1 on the insulating sheet 10, thereby reducing the precipitation of heterochromatic pigments in the electrolyte.
[0053] Optionally, the distance between the colored mark M1 and the edge of the insulating sheet 10 along the second direction Y is h. Here, 0 mm ≤ h ≤ 6 mm. Optionally, h is 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, or 6 mm. It is understood that a smaller distance between the colored mark M1 and the edge of the insulating sheet 10 facilitates the CCD device's positioning and alignment of the colored mark M1 with respect to the edge of the battery cell when it is captured. When h is 0 mm, the colored mark M1 is positioned flush against the edge of the insulating sheet 10.
[0054] In the fourth embodiment, the plurality of different color marks M1 may also be arranged in two rows along the first direction X, such as Figure 4 As shown. Multiple colored marks M1 are arranged in two columns. Given a fixed area for each colored mark M1, providing an additional column of colored marks M1 can increase the total area of the marks M on the insulating sheet 10, making it easier for the CCD device to capture the colored marks M1, thereby improving the accuracy of offset detection. It is understandable that the larger the area of the mark M, the easier it is for the CCD device to capture the mark M. Furthermore, by providing two columns of colored marks M1, the CCD device captures the first column for deflection detection and then performs deflection detection based on the second column, further improving detection accuracy.
[0055] Optionally, the area of each heterochromatic mark M1 is S k , of which 2mm 2 ≤S k ≤16mm 2 The shape of the different color mark M1 includes at least one of a circle, an ellipse, a triangle, a quadrilateral, a pentagon, or a hexagon. The distance between two adjacent different color marks M1 along the first direction X is g, where g≥1 mm.
[0056] See also Figure 5 、 Figure 6 and Figure 7 , Figure 5 The insulating sheet 10 provided in the fifth embodiment of the present application; Figure 6 The insulating sheet 10 provided in the sixth embodiment of the present application; Figure 7 This is the insulating sheet 10 provided in the seventh embodiment of the present application.
[0057] The mark M in the fifth embodiment, the sixth embodiment, and the seventh embodiment is a hollow mark M2. The hollow mark M2 on the insulating sheet 10 increases the area where the battery cell is directly bonded to the adjacent components through the structural adhesive, thereby improving the bonding strength between the battery cell and the adjacent components. Optionally, in some other embodiments, the mark M includes both a different-color mark M1 and a hollow mark M2. The different-color mark M1 and the hollow mark M2 are arranged at intervals along the first direction X. The different-color mark M1 and the hollow mark M2 are arranged in a straight line or a curve along the first direction X, or in a combination of a straight line and a curve.
[0058] In the fifth embodiment, the mark M includes a plurality of hollow marks M2. The plurality of hollow marks M2 are arranged in rows at intervals along the first direction X, such as Figure 5 Optionally, the plurality of hollow marks M2 are arranged in one, two or three rows along the first direction X. Optionally, the plurality of hollow marks M2 are arranged in a straight line or a curved line along the first direction X, or in a combination of a straight line and a curved line.
[0059] In this embodiment, the hollow mark M2 is a circular through hole. The arrangement of multiple hollow marks M2 can greatly reduce the area of the mark M on the insulating sheet 10 while meeting the CCD device capture conditions, that is, reduce the hollow area, thereby ensuring the insulating area of the insulating sheet 10. Optionally, the area of each hollow mark M2 is S k , of which 2mm 2 ≤S k ≤16mm 2 It can be understood that the area S of each hollow mark M2 k If it is too small, the CCD device cannot capture the hollow mark M2, resulting in positioning failure; the area S of the hollow mark M2 k If it is too large, the area of the hollow mark M2 will be too large, and the total area of the multiple circular through holes will be large, which will increase the possibility of the battery cell short-circuiting due to contact between the hollow mark M2 and the shell. 2 ≤S k ≤16mm 2 This allows the CCD device to capture and grasp the heterochromatic mark M1 while reducing the possibility of the battery cell short-circuiting due to contact between the hollow mark M2 and the shell.
[0060] Optionally, the shape of the hollow mark M2 includes at least one of a circle, an ellipse, a triangle, a quadrilateral, a pentagon, or a hexagon. In the fifth embodiment, the shapes of the multiple hollow marks M2 are all circular. Optionally, in other embodiments, the shapes of the multiple hollow marks M2 can all be ellipses, triangles, quadrilaterals, pentagons, or hexagons. The shapes of the multiple hollow marks M2 can also be other, as long as the CCD device can capture the hollow marks M2.
[0061] Optionally, the spacing between two adjacent hollow marks M2 along the first direction X is g, where g ≥ 1 mm. For example, g is 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, etc. On the one hand, g ≥ 1 mm facilitates the positioning, coating and formation of the hollow marks M2 of multiple through holes on the insulating sheet body. If g is too small, the position determination of the hollow marks M2 of the multiple through holes may deviate, reducing the accuracy of the hollow marks M2 set on the insulating sheet body. In addition, if g is too small, two adjacent hollow marks M2 may overlap and be connected. On the other hand, g ≥ 1 mm can reduce the area occupied by the hollow mark M2 on the insulating sheet 10, thereby reducing the possibility of the battery cell short-circuiting due to contact between the hollow mark M2 and the outer shell.
[0062] like Figure 5 As shown, the distance between the hollow mark M2 and the edge of the insulating sheet 10 along the second direction Y is h. Here, 0mm≤h≤6mm. Optionally, h is 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, or 6mm. It is understandable that the distance between the hollow mark M2 and the edge of the insulating sheet 10 is small, which facilitates the CCD device to locate and align the hollow mark M2 according to the edge of the battery cell when the CCD device grabs the hollow mark M2. When h is 0mm, the hollow mark M2 is set at the edge of the insulating sheet 10.
[0063] For example, in the sixth embodiment, the mark M includes a plurality of hollow marks M2. The plurality of hollow marks M2 are arranged in a row along the first direction X at intervals, such as Figure 6 Each hollow mark M2 is a rectangular through hole, and a plurality of rectangular through holes are arranged on the edge of the insulating sheet 10 .
[0064] like Figure 7 As shown, the multiple hollow marks M2 include multiple through holes, and the shapes of the multiple through holes include circular, triangular, quadrilateral, pentagonal and hexagonal. Along the first direction X, the circular through holes, triangular through holes, quadrilateral through holes, pentagonal through holes and hexagonal through holes are arranged in a cyclic manner. It can be understood that the distance between two adjacent hollow marks M2 is set. When the insulating sheet 10 is attached to the surface of the battery cell, the CCD device records the shape of the first through hole. Then, the hollow marks M2 of different shapes and the number thereof are detected to estimate the length of the insulating sheet 10 used, so as to facilitate cutting after attachment.
[0065] See also Figure 8 The present invention also provides a battery 100, comprising a housing 30, a battery cell 20, and an insulating sheet 10 according to an embodiment of the present invention. The housing 30 has a receiving cavity, within which both the battery cell 20 and the insulating sheet 10 are disposed. The insulating sheet 10 is disposed between the battery cell 20 and the housing 30, and wraps around the sides and bottom of the battery cell 20.
[0066] In the battery 100 provided in the embodiment of the present application, a mark M is continuously or intermittently provided on at least one side of the insulating sheet 10 along the first direction X, and the insulating sheet 10 is wrapped around the side and bottom surfaces of the battery cell 20 with the side where the mark M is exposed as the outer side; wherein, the area ratio occupied by the mark M on one side of the insulating sheet 10 is less than or equal to 50%; providing the mark M on the insulating sheet 10 can facilitate the CCD device to accurately position the insulating sheet 10 by grabbing the mark M during the attachment process, thereby reducing the possibility of attachment deviation; when the mark M is formed by a heterochromatic pigment, setting the mark M to occupy an area ratio of less than or equal to 50% on the surface of the insulating sheet 10 can greatly reduce the use of the heterochromatic pigment, thereby reducing the precipitation of the heterochromatic pigment in the electrolyte of the battery 100, and further reducing the reaction between the heterochromatic pigment and substances in the electrolyte; if the mark M does not use a heterochromatic pigment, the precipitation and adverse reaction of the heterochromatic pigment are directly avoided, and the small area ratio occupied by the mark M can also ensure the insulation area and insulation effect.
[0067] The above is a description of the insulating sheet 10 and the battery 100 provided in the embodiment of the present application.
[0068] The insulating sheet provided in the embodiment of the present application is provided with a mark continuously or intermittently along a first direction on at least one side, and the insulating sheet is wrapped around the battery cell with the side where the mark is exposed as the outer side; wherein, the area occupied by the mark on one side of the insulating sheet is less than or equal to 50%; providing a mark on the insulating sheet can facilitate the CCD device to accurately position the insulating sheet by grabbing the mark during the attachment process, thereby reducing the possibility of attachment deviation; when the mark is formed by a heterochromatic pigment, the area occupied by the mark on the surface of the insulating sheet is less than or equal to 50%, which can greatly reduce the use of the heterochromatic pigment, thereby reducing the precipitation of the heterochromatic pigment in the electrolyte of the battery, and further reducing the reaction between the heterochromatic pigment and substances in the electrolyte; if the mark does not use a heterochromatic pigment, the precipitation and adverse reaction of the heterochromatic pigment are directly avoided, and the small area occupied by the mark can also ensure the insulation area and insulation effect.
[0069] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.
Claims
1. An insulating sheet, characterized in that: Used for insulation between the battery cell and the outer shell, the insulating sheet extends along a first direction, and a mark is continuously or intermittently provided on at least one side of the insulating sheet along the first direction. The insulating sheet is wrapped around the battery cell with the side exposing the mark as the outer side, wherein the area occupied by the mark on one side of the insulating sheet is less than or equal to 50%.
2. The insulating sheet according to claim 1, wherein The mark occupies less than or equal to 10% of the area of one surface of the insulating sheet.
3. The insulating sheet according to claim 1, wherein The mark includes at least one linear and / or curved mark of different colors, and the marks of different colors are continuously arranged along the first direction.
4. The insulating sheet according to claim 3, wherein The width of the different-color mark along the second direction is k, 0.1 mm≤k≤4 mm, wherein the second direction intersects the first direction.
5. The insulating sheet according to claim 1, wherein The mark includes a plurality of marks of different colors, and the plurality of marks of different colors are arranged in at least one column at intervals along the first direction.
6. The insulating sheet according to claim 5, wherein The area of each of the heterochromatic marks is S k , 2mm 2 ≤S k ≤16mm 2 ; and / or, the shape of the heterochromatic mark includes at least one of a circle, an ellipse, a triangle, a quadrilateral, a pentagon or a hexagon; and / or, the distance between two adjacent different-color marks along the first direction is g, g ≥ 1 mm; And / or, a distance between the different-color mark and the edge of the insulating sheet along a second direction is h, 0 mm ≤ h ≤ 6 mm, and the second direction intersects with the first direction.
7. The insulating sheet according to claim 1, wherein The mark includes a plurality of hollow marks, and the plurality of hollow marks are arranged in at least one row at intervals along the first direction.
8. The insulating sheet according to claim 7, wherein The area of each hollow mark is S k , 2mm 2 ≤S k ≤16mm 2 ; And / or, the shape of the hollow mark includes at least one of a circle, an ellipse, a triangle, a quadrilateral, a pentagon or a hexagon; and / or, the distance between two adjacent hollow marks along the first direction is g, g ≥ 1 mm; And / or, a distance between the hollow mark and the edge of the insulating sheet along a second direction is h, 0mm≤h≤6mm, and the second direction intersects with the first direction.
9. The insulating sheet according to any one of claims 1 to 8, wherein: The thickness of the insulating sheet is 0.01 mm to 1.0 mm.
10. A battery, characterized in that: It comprises a shell, a battery cell and an insulating sheet as described in any one of claims 1 to 9, wherein the shell has a accommodating cavity, the battery cell and the insulating sheet are both arranged in the accommodating cavity, wherein the insulating sheet is arranged between the battery cell and the shell, and the insulating sheet wraps the side and bottom surfaces of the battery cell.