CN220703564U - Adhesive tape, battery, electricity utilization device and energy storage device - Google Patents

Abstract

The application discloses sticky tape, battery, power consumption device and energy storage device. The adhesive tape comprises a substrate layer and an adhesive layer laminated and bonded with the surface of the substrate layer, wherein grooves are formed in the surface of the substrate layer and are arranged along the length direction of the adhesive tape; the adhesive layer is adhered on the surface of the substrate layer and extends into the groove to be filled. The grooves formed in the surface of the substrate layer contained in the adhesive tape form a thinning interval of the substrate layer, and after the adhesive tape is adhered to the bending part of the attaching interface, the adhesive strength and stability of the adhesive tape and a member to be adhered can be obviously enhanced, and curling and warping of the edge of the adhesive tape are reduced. After the adhesive tape is contained in the battery, the performance of the battery including insulation stability and the like can be improved.

Description

Adhesive tape, battery, electricity utilization device and energy storage device

Technical Field

The application belongs to the technical field of adhesive tapes, and particularly relates to an adhesive tape, a battery, an electric device and an energy storage device.

Background

The battery is like the attached membrane material that has insulating and wear resistance concurrently of power battery module hem is thicker (not less than 175 mu m), if: bottom insulating film, secondary blue film, insulating cover, etc., these films exhibit a strong rebound resilience after bending. When the adhesive layer such as double faced adhesive tape is adopted for bonding, the adhesive layer has creep phenomenon, and the adhesive film is easy to warp due to rebound resilience after bending of the film material. This will affect the appearance of the cell and cause insulation and wear failure at the cocked interface where the film protection is lost.

Disclosure of Invention

In view of the above problems, the application provides an adhesive tape, a battery, an electric device and an energy storage device, so as to solve the technical problems that the adhesive strength of the adhesive tape and an attaching interface is unstable, and an adhesive film is easy to warp.

In a first aspect, embodiments of the present application provide an adhesive tape. The adhesive tape comprises a substrate layer and an adhesive layer laminated and bonded with the surface of the substrate layer, wherein grooves are formed in the surface of the substrate layer laminated with the adhesive layer, and the grooves are formed along the length direction of the adhesive tape; the surface of the adhesive layer laminated with the substrate layer extends into the trench and fills the trench.

After the adhesive tape is bonded with the member to be bonded, the adhesive layer contained in the adhesive tape can be effectively bonded on the member, particularly at the bending part of the member to be bonded. Meanwhile, as the grooves are formed in the surface of the substrate layer contained in the adhesive tape, the grooves form a thinning interval of the substrate layer, and after the adhesive tape is adhered to the bending part of the to-be-adhered component, the grooves contained in the substrate layer can effectively reduce the bending angle stress generated by bending of the substrate layer, so that the adhesive strength and stability of the adhesive tape and the to-be-adhered component can be obviously enhanced, and the bad phenomenon that the adhesive tape and the to-be-adhered component attach interface generate edge curling and warping is obviously reduced.

In some embodiments, the substrate layer has two surfaces disposed opposite to each other, each of the surfaces of the substrate layer is provided with the groove, and each of the surfaces of the substrate layer is laminated and bonded with the adhesive layer. At this time, the adhesive tape of the embodiment of the application forms a double-sided adhesive tape, and the grooves arranged on the two opposite surfaces of the substrate layer jointly construct a thinning interval of the substrate layer, when the adhesive tape of the embodiment of the application plays a role of bonding, and the grooves are bent, the bending angle stress generated by bending the substrate layer can be further reduced, so that the adhesive strength and stability of the adhesive tape, particularly the adhesive tape, at the edge and the attaching interface are further enhanced, and the bad phenomenon that the adhesive tape and the attaching interface of a member to be bonded are curled and tilted at the edge is reduced.

In an embodiment, the grooves formed on one surface of the substrate layer are symmetrically arranged with the grooves formed on the other surface. The grooves on the opposite surfaces are symmetrically arranged, so that the positions of the thinning areas on the two opposite surfaces are the same or symmetrical, and the bending angle stress generated by bending the substrate layer in the thinning areas can be further reduced, thereby further enhancing the bonding strength and stability of the adhesive tape, particularly the adhesive tape edge and the attaching interface.

In some embodiments, the trench includes at least one of the following (1) to (3):

(1) The depth of the groove is 1-15 mu m, and can be 3-10 mu m;

(2) The width of the groove is 0.5-30 mm, and can be 0.5-15 mm;

(3) The ratio of the width of the groove to the surface width of the base material layer is 0.1 to 0.8:1, optionally 0.1 to 0.5:1.

through the selection and adjustment of the depth and width dimensions of the groove 11 and the ratio of the groove width to the surface width of the substrate layer, the bending angle stress generated by bending the substrate layer in the thinning region can be effectively reduced, so that the adhesive strength and stability of the adhesive tape, particularly the adhesive interface between the edge and the adhesive surface, can be improved.

In some embodiments, the surface of the substrate layer at two sides of the groove is provided with a plurality of pores.

In an embodiment, the aperture comprises at least one of the following (1) to (4):

(1) The diameter of the pores is 0.1-10 mu m, and can be 0.1-5 mu m;

(2) The depth of the pores is 1-30 mu m, optionally 5-25 mu m, along the direction from the surface of the substrate layer to the bottom of the groove;

(3) The plurality of pore formations comprise at least one of a grid structure and an array distribution;

(4) The cross section of the individual apertures comprises at least one of hexagonal, rectangular, circular, prismatic, triangular.

The surface and the surface area of the substrate layer are provided with pores, the diameters, the depths, the structural morphology and the like of the pores are further selected and controlled, the bonding area between the surface and the surface area of the substrate layer and the adhesive layer can be increased, the bonding strength between the surface area of two sides of the groove contained in the substrate layer and the adhesive layer is increased, and the phenomenon that the two sides of the substrate layer and the adhesive layer are degummed due to the bending angle stress generated by bending the substrate layer in a thinning interval is reduced.

In some embodiments, the substrate layer has a thickness of 1 to 10 μm, optionally 3 to 8 μm.

Through selecting and controlling the thickness and the like of the substrate layer, the grooves in the substrate layer can be assisted to fully play the role of the grooves, so that the bending angle stress generated by bending the substrate layer in a thinning region is further reduced, the bonding strength and stability of the adhesive tape, particularly the adhesive tape, at the bending part of an attaching interface are improved, and the curling and warping of the edge of the adhesive tape are reduced. But also endows the adhesive tape with good mechanical properties such as good stretching resistance and the like.

In some embodiments, the adhesive layers laminated and bonded on the two side surfaces of the groove of the substrate layer are end adhesive layers, and the thickness of the end adhesive layers is 1-15 μm, optionally 1-10 μm.

Through the control to tip gluing layer thickness, can effectively strengthen tip gluing layer self cohesion, improve the tensile resistance of tip gluing layer itself and the mechanical properties of membrane structure, reduce the bending angle stress that the tip gluing layer itself takes place to buckle at the substrate layer and produce or attach the interface and take place to be torn etc. adverse phenomenon under the effect such as abnormal effort.

In some embodiments, the adhesive layer further comprises a release film layer, wherein the release film layer is attached to the surface of the adhesive layer, which is away from the substrate layer. The release film layer can protect the surface of the adhesive layer.

Or in some embodiments, the substrate layer has two surfaces that are oppositely disposed, each of the surfaces of the substrate layer is laminated and bonded with the adhesive layer, wherein a release film layer is attached to a surface of one of the adhesive layers, which is away from the substrate layer, and a wear-resistant layer is attached to a surface of the other adhesive layer, which is away from the substrate layer. The release film layer can protect the surface of the adhesive layer, and the wear-resistant layer plays roles of isolation, protection and the like.

In a second aspect, embodiments of the present application provide a battery. The battery comprises the adhesive tape.

The adhesive tape and the corresponding attachment interface of the battery are high and stable in adhesive strength, and the edge of the adhesive tape is not easy to cause bad phenomena of curling and warping. Thereby improving the performance of the battery including insulation stability and the like, and thus improving the stability, safety and the like of the battery including operation.

In an embodiment, the battery includes any one of a battery cell, a battery module, and a battery pack.

In a third aspect, an embodiment of the present application further provides an electrical apparatus. The power utilization device comprises a power supply unit or an energy storage unit, wherein the power supply unit or the energy storage unit comprises a battery, and the battery comprises a battery of the embodiment of the application. The power supply unit or the energy storage unit of the electric device has excellent performances such as insulation and working stability.

In a fourth aspect, embodiments of the present application also provide an energy storage device comprising an energy storage unit, the energy storage unit containing a battery, the battery comprising a battery of the embodiments of the above-described application. The energy storage unit of the energy storage device has excellent performances such as insulation performance and working stability.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic view of a single sided adhesive layer of some embodiments of the present application;

FIG. 2 is a schematic view of a double sided adhesive layer of some embodiments of the present application;

FIG. 3 is a top view of a portion of a substrate layer included in some embodiments of the tape of the present application;

FIG. 4 is a schematic view of a release film layer included in some embodiments of the present application;

FIG. 5 is a schematic view of the structure of a release film layer and a wear layer included in some embodiments of the tape of the present application;

FIG. 6 is a schematic diagram of the application of some embodiments of the adhesive tape in a battery cell;

fig. 7 is a schematic structural diagram of an embodiment of a battery module according to the present application.

Reference numerals in the specific embodiments are as follows:

10-a step of adhering the adhesive tape,

1-substrate layer, 11-trench, 12-first surface, 13-second surface, 14-aperture;

2-adhesive layers, 21-first adhesive layers, 22-second adhesive layers, 23-third adhesive layers and 24-fillers;

3-release film layer, 4-abrasion-resistant layer;

30-battery cell, 31-shell;

40-battery module.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

With the rapid popularization of battery applications, particularly in electric vehicles, there are increasing demands on the operational stability and safety of batteries. In order to improve the working stability and safety of the battery, a film material with insulation and wear resistance is generally attached to the battery such as a power battery module in a flanging manner, and the film material comprises a bottom insulation film, a secondary blue film, an insulation cover and the like. However, these films are thicker, generally not less than 175 μm, and exhibit a strong rebound resilience after bending, in addition to the characteristics of the films themselves.

In order to solve the rebound resilience of the membrane after bending and improve the stability of the membrane setting, a bonding layer is generally added between the membrane layers and the battery to fix and shape the membrane. However, due to the rebound resilience of the film material, and the phenomena of creep and the like of the adhesive layer such as double faced adhesive tape, the film material including the adhesive layer tends to be easily tilted. Moreover, because the current film material hem width is shorter (generally 2-3 mm), the bubble is inevitably introduced at the attaching interface in actual automated production simultaneously, and the actual attaching area of the adhesive layer is extremely small, so that the phenomenon that the film material including the adhesive layer is tilted frequently occurs. This results in the film including the tie layer lifting including the tie layer breaking away from the tie interface on the one hand and the film breaking away from the tie layer interface on the other hand. The warping phenomenon can affect the appearance of a battery such as a battery module and cause insulation and wear-resistant failure at a warping interface where the protection of a film material is lost, thereby affecting the working stability and the safety of the battery.

In order to reduce the phenomenon of warping of the film material including the bonding layer, two main solutions exist at present: 1. selecting a double-sided adhesive tape with high bonding strength; 2. and (5) thinning the film material. However, when the adhesive strength of the adhesive tape is too high, the adhesive tape is difficult to detach after being attached to the interface, repair is difficult, the area of the residual adhesive is large, and interface cleaning is difficult; when the film is too thin, the risk of insulation, wear failure is increased and the appearance is affected.

There are also attempts to improve the double-sided adhesive tape, but although the improved double-sided adhesive tape can relieve the phenomenon that the rear edge or two ends of the attaching plane are tilted, the phenomenon that the attaching flange of the film is tilted still cannot be solved due to the existence of the bending stress of the film when the film is bent.

In order to effectively relieve the phenomenon of tilting of the folded edge of the film material comprising the bonding layer, the conventional adhesive tape is improved, specifically, a substrate layer is additionally arranged on the adhesive tape, a groove is formed in the surface of the substrate layer, which is combined with the adhesive layer in a laminated mode, the groove is formed according to the length of the adhesive tape, the adhesive layer is laminated on the surface containing the groove, and the surface of the adhesive layer extends into the groove and is filled. Like this, the substrate layer that this sticky tape contains for the thickness of the slot department of substrate layer constitutes the attenuate district of substrate layer owing to the existence of slot, thereby has effectively reduced the rebound stress when changing the sticky tape and take place to buckle, and under the synergism of gluing layer, can effectively alleviate the phenomenon of raising of the hem emergence of membrane material and this sticky tape, reinforcing membrane material hem stability and the fastness of bonding.

Adhesive tape:

in a first aspect, embodiments of the present application provide an adhesive tape. As in some embodiments, the tape structure of the present embodiment is as shown in fig. 1 to 3, and the tape 10 of the present embodiment includes a base material layer 1 and an adhesive layer 2 laminated and bonded to a surface of the base material layer 1. The surface of the substrate layer 1 laminated with the adhesive layer 2 is provided with a groove 11, and the groove 11 is arranged along the length direction of the adhesive tape 10; the surface of the adhesive layer 2 laminated with the base material layer 1 extends into the groove 11 and fills the groove 11.

In the adhesive tape 10 of the embodiment of the present application, the surface of the base material layer 1 containing the grooves 11 is "concave" in cross section perpendicular to the longitudinal direction of the adhesive tape 10 due to the arrangement of the grooves 11 on the surface of the base material layer 1. Also, due to the arrangement of the grooves 11 on the surface of the substrate layer 1, the surface of the substrate layer 1 provided with the grooves 11 is divided to include three surface areas as shown in fig. 1 to 3: the bottom of the groove 11, which is arranged in the middle of the surface, is the thinned area, the first surface 12 area of the substrate layer 1 on one side of the groove 11 and the second surface 13 area of the substrate layer 1 on the other side of the groove 11.

The lamination bonding between the substrate layer 1 and the adhesive layer 2 means that one surface of the adhesive layer 2 is laminated on the surface of the substrate layer 1 containing the grooves 11, and the surface of the adhesive layer 2 facing away (away from) from the substrate layer 1 is used for bonding with a member to be bonded. The lamination bonding of the adhesive layer 2 on the surface of the substrate layer 1 comprises filling the grooves 11 and simultaneously comprises lamination bonding on the first surface 12 and the second surface 13 of the substrate layer 1 on both sides of the grooves 11, that is, the adhesive layer 2 extends and covers the first surface 12 and the second surface 13 of the substrate layer 1 on both sides of the grooves 11 except for filling the grooves 11.

Based on the structure of the adhesive tape 10 according to the embodiment of the present application, after the adhesive tape 10 is bonded to a member to be bonded, the adhesive layer 2 contained in the adhesive tape 10 can be effectively bonded to the member, particularly, at the bent portion of the member to be bonded. Meanwhile, since the grooves 11 are formed on the surface of the substrate layer 1 included in the adhesive tape 10, the grooves 11 form the thinning area of the substrate layer 1, and then the thickness of the substrate layer 1 including the first surface 12 and the second surface 13 at two sides of the corresponding grooves 11 is greater than the thickness of the thinning area. In this way, after the adhesive tape 10 is adhered to the bending portion of the member to be adhered, the groove 11 (i.e. the thinning region) included in the base material layer 1 can effectively reduce the bending angle stress generated by bending the base material layer 1, so that the adhesive strength and stability of the adhesive tape 10 and the member to be adhered can be obviously enhanced, and the adverse phenomenon that the adhesive tape 10 and the attaching interface of the member to be adhered have edge curling and warping can be obviously reduced.

The surface of the substrate layer 1 included in the adhesive tape 10 according to the embodiment of the present application may include at least one surface, for example, in the embodiment, the substrate layer 1 may have one surface or two surfaces disposed opposite to each other.

In some embodiments, when the substrate layer 1 included in the adhesive tape 10 of the embodiment of the present application has one surface, as shown in fig. 1 and 3, the substrate layer 1 includes the surface provided with the groove 11 along the length direction of the adhesive tape 10, the adhesive layer 2 is laminated on the surface including the groove 11, and the adhesive layer 2 fills the groove 11 and covers the first surface 12 and the second surface 13 of the substrate layer 1 on both sides of the groove 11.

In other embodiments, when the base material layer 1 included in the adhesive tape 10 of the embodiment of the present application has two surfaces disposed opposite to each other, the adhesive tape 10 of the embodiment of the present application has the structure shown in fig. 2 and 3. At this time, the cross section of the base material layer 1 along the longitudinal direction thereof is in the shape of an h. The cross section of the base material layer 1 is a cross section perpendicular to the longitudinal direction of the adhesive tape 10 or the base material layer 1. The transverse H-shaped is relative to a normal vertical H-shaped. In the substrate layer 1 having two surfaces disposed opposite to each other, each surface of the substrate layer 1 is provided with the groove 11 along the length direction of the tape 10, the adhesive layer 2 is laminated and adhered on each of the surfaces including the groove 11, and the adhesive layer 2 laminated and adhered on each surface fills the groove 11 and covers the first surface 12 and the second surface 13 of the substrate layer 1 on both sides of the groove 11. The adhesive tape of the embodiment of the application forms a double-sided adhesive tape. By arranging the grooves 11 on two opposite surfaces of the substrate layer 1, the grooves 11 arranged on the two opposite surfaces jointly construct a thinning section of the substrate layer 1, so that when the adhesive tape 10 of the embodiment of the application plays a bonding role, and the grooves 11 are bent, the bending angle stress generated by bending the substrate layer 1 can be further reduced, the adhesive strength and stability of the adhesive tape 10, particularly the adhesive tape 10, at the edge and the attaching interface are further enhanced, and the defect that the adhesive tape 10 and the attaching interface of a member to be bonded have edge curling and warping is reduced.

In the embodiment, as shown in fig. 2 and 3, when the substrate layer 1 has two surfaces disposed opposite to each other and each surface is provided with the grooves 11, the grooves 11 disposed on one surface and the grooves 11 disposed on the other surface of the substrate layer 1 are symmetrically disposed. It is understood that the symmetrical arrangement of the two trenches 11 takes the thinning area of the substrate layer 1 between the two trenches 11 as a symmetry axis, and the positions of the two trenches 11 are symmetrical, specifically, the width d4 of the first surface 12 area of one surface of the substrate layer 1 is equal to the width d4 of the first surface 12 area of the other surface, and the width d5 of the second surface 13 area of the one surface is equal to the width d5 of the second surface 13 area of the other surface. In an exemplary embodiment, the grooves 11 on one surface of the substrate layer 1 and the grooves 11 on the other surface may be mirror images. The mirror image arrangement means that the thinning interval of the substrate layer 1 between the two grooves is taken as a symmetry axis, and the positions of the two grooves 11 are symmetrically arranged, which naturally includes that the shapes or the sizes of the grooves 11 are the same. By arranging the grooves 11 on the opposite surfaces symmetrically so that the positions of the thinned regions on the two opposite surfaces are the same or symmetrical, the bending angle stress generated by bending the base material layer 1 in the thinned regions can be further reduced, and the adhesive strength and stability of the adhesive tape 10, particularly the adhesive interface between the edge of the adhesive tape 10, can be further enhanced.

The grooves 11 included in the substrate layer 1 in the above embodiments should be disposed on the surface of the substrate layer 1 laminated with the adhesive layer 2, so that in the process of playing the bonding role of the adhesive tape 10 in the embodiment of the present application, the bending angle stress generated by bending the substrate layer 1 in the thinned region is reduced, thereby ensuring the bonding strength and stability of the adhesive tape 10 in particular to the edge and the attachment interface thereof, and reducing the edge curling and warping defect of the adhesive tape 10 in particular to the attachment interface of the edge and the member to be bonded.

Thus, in some embodiments, the trench 11 included in the substrate layer 1 may at least include the following features in each embodiment:

in an embodiment, as shown in fig. 1 and 2, the depth d2 of the trench 11 may be 1 to 15 μm, alternatively 3 to 10 μm, and in an exemplary embodiment, may be a typical but non-limiting range of depths such as 1 to 3 μm, 3 to 5 μm, 5 to 7 μm, 7 to 9 μm, 9 to 10 μm, 10 to 12 μm, 12 to 14 μm, 14 to 15 μm, etc.

In an embodiment, as shown in fig. 1 and 2, the width d3 of the groove 11 may be 0.5 to 30mm, optionally 0.5 to 15mm, and in an exemplary embodiment, may be a typical but non-limiting width range of 0.5 to 1mm, 1 to 3mm, 3 to 5mm, 5 to 7mm, 7 to 9mm, 9 to 10mm, 10 to 12mm, 12 to 14mm, 14 to 15mm, 15 to 17mm, 17 to 19mm, 19 to 20mm, 20 to 22mm, 22 to 24mm, 24 to 26mm, 26 to 28mm, 28 to 30mm, etc.

Of course, the depth d2 and the width d3 of the trench 11 may be the specific size ranges described above, and may be a proportional range set according to the size, for example, d2: d3 may be 1 to 15: 500-30000), optionally 3-10: (500-30000), 1-15: (500-15000), 3-10: (500 to 15000), etc., in the exemplary case, 1 to 3: (500-1000), 3-5: (1000-3000), 5-7: (5000-7000), 7-9: (17000-19000), 10-12: (19000-20000), 12-14: (22000-24000), 14-15: (28000-30000) and the like.

By selecting and controlling the dimensions of the depth d2 and the width d3 of the groove 11, the bending angle stress generated by bending the substrate layer 1 in the thinned region can be effectively reduced, so that the adhesive strength and stability of the adhesive tape 10, particularly the adhesive interface between the edge and the adhesive interface, can be improved. In addition, the width d3 of the groove 11 may be adjusted according to the morphology of the adhesive tape 10 and the attaching interface in the embodiment of the present application.

In the embodiment, the ratio of the width d3 of the trench 11 to the width of the surface of the base material layer 1 containing the trench 11 is 0.1 to 0.8:1, optionally 0.1 to 0.5:1, in an exemplary case, may be 0.1: 1. 0.2: 1. 0.3: 1. 0.4: 1. 0.5: 1. 0.6: 1. 0.7: 1. 0.8:1, etc. typical but non-limiting ratio ranges. Wherein the surface width of the groove 11 refers to the width of the cross section of the substrate layer 1 perpendicular to the length direction of the adhesive tape 10, specifically, as shown in the sum of d3+d4+d5 in fig. 1 and 2, the ratio of the width d3 of the groove 11 to the surface width of the substrate layer 1 containing the groove 11 can be expressed as d3: (d3+d4+d5) is 0.1 to 0.8:1. d4 is the width of the first surface 12 of the substrate layer 1 on one side of the trench 11, and d5 is the width of the second surface 13 of the substrate layer 1 on the other side of the trench 11.

The width d3 of the groove 11 is controlled to occupy the whole surface width range of the substrate layer 1, so that the width of the thinned region of the substrate layer 1 can be adjusted, and the bending angle stress generated by bending the substrate layer 1 in the thinned region can be further reduced, thereby improving the bonding strength and stability of the adhesive tape 10, particularly the edge and the attaching interface thereof.

In addition, the width d4 of the first surface 12 of the substrate layer 1 on one side wall of the groove 11 and the width d5 of the second surface 13 of the substrate layer 1 on the other side wall of the groove 11 may be equal or unequal, and may be specifically adjusted according to the application requirements of the adhesive tape 10 according to the embodiment of the present application. When the width d4 is equal to the width d5, then the trench 11 is disposed at the midpoint of one surface of the substrate layer 1.

In some embodiments, as shown in fig. 3, the first surface 12 and the second surface 13 of the substrate layer 1 on both sides of the trench 11 in each of the above embodiments are provided with a plurality of pores 14. The pores 14 are arranged in the first surface 12 and the second surface 13 of the substrate layer 1, so that the bonding area between the first surface 12 and the second surface 13 of the substrate layer 1 and the adhesive layer 2 can be increased, the bonding strength between the first surface 12 and the second surface 13 of the substrate layer 1 and the adhesive layer 2 can be increased, and the phenomenon that the two sides of the substrate layer 1 and the adhesive layer 2 are degummed due to the bending angle stress generated by bending the substrate layer 1 in a thinning interval can be reduced. The voids 14 may extend in the thickness direction of the base material layer 1 or may be random, and may increase the surface areas of the first surface 12 and the second surface 13, thereby enhancing the adhesive strength with the adhesive layer 2.

In an embodiment, the plurality of apertures 14 provided in the areas of the first surface 12 and the second surface 13 include features of at least one of the following (1) to (4):

(1) The pore 14 may have a diameter of 0.1 to 10 μm, optionally 0.1 to 5 μm, and in the exemplary case, may have a typical but non-limiting pore diameter of 0.1 to 1 μm, 1 to 2 μm, 2 to 3 μm, 3 to 4 μm, 4 to 5 μm, 5 to 6 μm, 6 to 7 μm, 7 to 8 μm, 8 to 9 μm, 9 to 10 μm, etc.

(2) The depth of the pores 14 is 1 to 30 μm, optionally 5 to 25 μm, in the direction from the surface of the base material layer 1 to the bottom of the grooves 11, and in the exemplary case, typical but non-limiting depth ranges of 1 to 3 μm, 3 to 5 μm, 5 to 7 μm, 7 to 9 μm, 9 to 10 μm, 10 to 12 μm, 12 to 14 μm, 14 to 15 μm, 15 to 17 μm, 17 to 19 μm, 19 to 20 μm, 20 to 22 μm, 22 to 24 μm, 24 to 26 μm, 26 to 28 μm, 28 to 30 μm, etc. are possible. In an embodiment, the depth of the aperture 14 may be the same as the depth of the trench 11.

(3) The plurality of apertures 14 comprise at least one of a grid structure, an array distribution.

(4) The cross-section of the individual apertures 14 may comprise at least one of hexagonal, rectangular, circular, prismatic, triangular.

By setting the pores 14 in the first surface 12 and the second surface 13 of the substrate layer 1, and selecting and controlling the diameter, the depth, the structural morphology, and the like, the bonding area between the first surface 12 and the second surface 13 of the substrate layer 1 and the adhesive layer 2 can be further increased, so that the bonding strength between the first surface 12 and the second surface 13 of the substrate layer 1 and the adhesive layer 2 is increased, and the adverse phenomenon that the adhesive tape 10 and the attaching interface of the member to be bonded have edge curling and warping is further reduced. In addition, depending on the depth and diameter of the pores 14, the distribution density of the pores 14 in the areas of the first surface 12 and the second surface 13 may be controlled, and the porosity in the areas of the first surface 12 and the second surface 13 may be controlled to be 10% to 90%, alternatively 30% to 90%.

In some embodiments, the thickness of the substrate layer 1 included in the adhesive tape 10 of each of the above embodiments may be 1 to 10 μm, optionally 3 to 8 μm, and in the examples, typical but non-limiting thicknesses may be 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, etc. The thickness of the substrate layer 1 refers to the distance from one surface to the other surface of the substrate layer 1, and is specifically shown as d1 in fig. 1 and 2. By selecting and controlling the thickness of the substrate layer 1, the grooves 11 contained in the substrate layer 1 can be assisted to fully exert the function of the grooves, so that the bending angle stress generated by bending the substrate layer 1 in a thinning region is further reduced, the bonding strength and stability of the adhesive tape 10, particularly the adhesive tape 10, at the bending part of an attaching interface are improved, and the adverse phenomenon that the adhesive tape 10, particularly the edge of the adhesive tape 10, is curled and tilted with the attaching interface of a member to be bonded is further reduced. At the same time, the overall thickness of tape 10 can be reduced.

In some embodiments, the substrate layer 1 included in the adhesive tape 10 of each of the above embodiments includes a tape-shaped polymer film, and specifically may include at least one of polyethylene terephthalate (PET), polyvinyl chloride (PVC), and Polyethylene (PE). The polymer films of the materials have good flexibility and small bending angle stress when being bent and produced. But also gives the adhesive tape 10 good mechanical properties such as good tensile resistance.

Since the adhesive layer 2 included in the adhesive tape 10 of each of the above embodiments is laminated and adhered on the surface of the substrate layer 1 including the grooves 11, the adhesive layer 2 may correspondingly include three areas based on the surface features of the substrate layer 1 including the grooves 11, as shown in fig. 1 and 2, where the three areas may be: the first adhesive layer 21, the surface of which extends into the groove 11, is laminated with the second adhesive layer 22, which is adhered to the region of the first surface 12 of the substrate layer 1, and the third adhesive layer 23, which is adhered to the region of the second surface 13. Thus, the second adhesive layer 22 may be understood as the portion of the first adhesive layer 21 extending over the area of the first surface 12 on one side and the third adhesive layer 23 may be understood as the portion of the first adhesive layer 21 extending over the area of the second surface 13 on the opposite side.

In some embodiments, the adhesive layer 2 includes at least one of polyacrylate, polyurethane, silicone, styrene-butadiene rubber, nitrile rubber, polyisoprene rubber, polyvinyl ether, and polyvinyl chloride. The adhesives endow the adhesive layer 2 with high adhesive strength, so that the adhesive strength and stability of the adhesive layer 2, namely, the adhesive tape 10 and an attaching interface are enhanced, and the bad phenomenon that the adhesive tape 10 is curled and tilted at the edge is reduced.

In some embodiments, the adhesive layer 2 laminated and adhered on the two side surfaces of the groove 11 of the substrate layer 1 is an end adhesive layer, and then the end adhesive layer includes at least one of the following (1) to (2):

(1) The thickness is 1 to 15 μm, optionally 1 to 10 μm, and in the exemplary embodiment, the thickness may be in the typical but non-limiting range of 1 to 3 μm, 3 to 5 μm, 5 to 7 μm, 7 to 9 μm, 9 to 10 μm, 10 to 12 μm, 12 to 14 μm, 14 to 15 μm, etc.

(2) As shown in fig. 1 and 2, contains a filler 24.

In combination with the structure shown in fig. 1 and fig. 2, the two side surfaces of the groove 11 included in the substrate layer 1 are the first surface 12 and the second surface 13 regions included in the substrate layer 1, and then the end adhesive layer laminated and bonded on the two side surfaces of the groove 11 included in the substrate layer 1 includes the second adhesive layer 22 laminated and bonded on the first surface 12 region included in the substrate layer 1 and the third adhesive layer 23 laminated and bonded on the second surface 13 region included in the substrate layer 1.

By controlling the thickness of the end adhesive layers such as the second adhesive layer 22 and the third adhesive layer 23, the adhesive strength and stability between the end adhesive layers and the substrate layer 1 and the attachment interface can be effectively enhanced.

The filler 24 is added into the end adhesive layers such as the second adhesive layer 22 and the third adhesive layer 23, and the filler 24 and the adhesive in the second adhesive layer 22 and the third adhesive layer 23 form a compound, so that the cohesive force of the second adhesive layer 22 and the third adhesive layer 23 can be effectively enhanced, the stretching resistance of the end adhesive layers and the mechanical properties of the film structure are improved, and the adverse phenomena such as tearing of the corner stress or the adhesive interface generated by bending of the end adhesive layers in the substrate layer 1 under the action of abnormal acting force and the like are reduced.

When the end adhesive layers such as the second adhesive layer 22 and the third adhesive layer 23 contain the filler 24, in an embodiment, the filler 24 may be contained in the end adhesive layers such as the second adhesive layer 22 or the third adhesive layer 23 in an amount of 1% to 10%, optionally 1% to 5%, and in an exemplary embodiment, may be contained in an amount of 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc., typically but not limited thereto. By controlling the content of the filler 24 in the end adhesive layer, the tensile resistance of the end adhesive layer itself and the mechanical properties of the film structure can be adjusted.

In an embodiment, the filler 24 may include at least one of titanium dioxide, carbon black, cobalt blue, red iron oxide, brown iron oxide, hydrated iron oxide. The filler types can effectively enhance the cohesive force of the end adhesive layer and improve the stretching resistance of the end adhesive layer and the mechanical property of the film structure. Moreover, the fillers also have own colors, so that the end adhesive layers such as the second adhesive layer 22 and the third adhesive layer 23 are endowed with corresponding colors, and thus the second adhesive layer 22, the third adhesive layer 23 and the first adhesive layer 21 can be effectively distinguished by naked eyes. In order to enhance the convenience of use of the adhesive tape 10 according to the embodiment of the present application, for example, the thinned area of the substrate layer 1 is effectively distinguished or the adhesive tape 10 is suitable for a bending portion, so that the thinned area of the substrate layer 1 is effectively bonded at the bending portion of the attachment interface, thereby improving the bonding strength and stability of the adhesive tape 10 and the attachment interface, and reducing the adverse phenomena that the adhesive tape 10 according to the embodiment of the present application, particularly, the edge of the adhesive tape 10 and the attachment interface of the member to be bonded, have edge curling and warping.

In some embodiments, as shown in fig. 4, the adhesive tape 10 of each embodiment further includes a release film layer 3, where the release film layer 3 is attached to the surface of the adhesive layer 2 facing away from the substrate layer 1. The release film layer 3 is convenient for separating the release film from the adhesive layer 2. Thus, the surface of the adhesive layer 2 is protected, the adhesive layer 2 contained in the adhesive tape 10 is prevented from being affected by adverse factors including pollution and the like before being adhered to an attaching interface, and good adhesive strength of the adhesive layer 2 is ensured. Of course, in the application embodiment, the adhesive tape 10 may be used to separate the release film layer 3 from the surface of the adhesive layer 2, so that the adhesive layer 2 is exposed and adhered to the attachment interface. The release film layer 3 is a film layer containing a release agent on the surface attached to the adhesive layer 2, and can be separated from the surface of the adhesive layer 2, for example, in the use process of the adhesive tape 10, the release film layer 3 is separated from the surface attached to the adhesive layer 2, so that the surface of the adhesive layer 2 is exposed.

In some embodiments, as shown in fig. 5, the adhesive tape 10 of each embodiment further includes a release film layer 3 and a wear-resistant layer 4, the substrate layer 1 has two surfaces disposed opposite to each other, and the two surfaces of the substrate layer 1 are laminated and bonded with the adhesive layers 2, wherein the release film layer 3 is attached to the surface of one adhesive layer 2 facing away from the substrate layer, and the wear-resistant layer 4 is attached to the surface of the other adhesive layer 2 facing away from the substrate layer 1. The release film layer 3 can protect the surface of the adhesive layer 2, and the wear-resistant layer 4 can be used as an outer surface to be in surface contact with other parts, so that the effects of isolation, protection, electrical insulation and the like are achieved. Thus, in an embodiment, the wear layer 4 may comprise at least one of polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC), polyvinylchloride (PVC), polyimide (PI), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF). The materials have good electrical insulation, wear resistance and other properties.

The adhesive tape 10 shown in fig. 5 is provided with grooves 11 on both surfaces of the base material layer 1, and it is also within the scope of the disclosure of the embodiment of the adhesive tape 10 to provide grooves 11 on one of the surfaces.

In a second aspect, the present embodiments also provide a method of making the tape 10 of the above-described embodiments. The adhesive tape 10 of the example of the present application was prepared. The preparation method of the adhesive tape 10 in the embodiment of the application comprises the following steps:

s10: providing a strip-shaped substrate; the strip-shaped base material is provided with at least one surface, the surface is provided with a groove, and the groove is arranged along the length direction of the strip-shaped base material;

s20: and forming a film layer on the surface of the strip-shaped base material by using the adhesive, filling the grooves to form an adhesive layer, and forming the adhesive tape.

The method of making the tape 10 of the present example was to make the tape 10 of the above-described application example. Therefore, the band-shaped substrate in step S10 constitutes the substrate layer 1 included in the adhesive tape 10 of the above text application example, and then the grooves on the surface of the band-shaped substrate are the grooves 11 on the substrate layer 1 included in the adhesive tape 10 of the above text application example. The adhesive layer formed in step S20 constitutes the adhesive layer 2 included in the adhesive tape 10 of the embodiment of the application of the present invention.

Therefore, the substrate layer contained in the adhesive tape prepared by the adhesive tape preparation method provided by the embodiment of the application is provided with the thinning section formed by the groove, and after the prepared adhesive tape is bonded with the attaching interface, the thinning section of the substrate layer can be bonded at the bending part of the attaching interface, and the thinning section effectively reduces the bending angle stress generated by bending the substrate layer, so that the bonding strength and stability of the adhesive tape and the attaching interface including the bending part of the attaching interface are enhanced, and the bad phenomenon that the adhesive tape is curled and tilted at the edge can be obviously reduced. In addition, the adhesive tape preparation method can ensure that the prepared adhesive tape yield and the preparation efficiency are high.

Step S10:

since the tape-like base material in step S10 constitutes the base material layer 1 included in the adhesive tape 10 of the above-mentioned application example, the features of the tape-like base material may be the relevant features of the base material layer 1 included in the adhesive tape 10 of the above-mentioned application example. In one embodiment, the strip-shaped substrate may have one surface or two surfaces disposed opposite to each other. In an embodiment, the tape substrate may be a tape film. The grooves provided on the surface of the tape substrate may also have the same features as the grooves 11 provided in the tape 10 of the example of the application. The thickness and material of the tape-like substrate are the same as those of the substrate layer 1 contained in the adhesive tape 10 of the above-mentioned application example.

In an embodiment, when the surfaces of the two sides of the strip-shaped substrate containing the grooves are provided with a plurality of pores. The two side surfaces of the groove are the first surface 12 area and the second surface 13 area of the substrate layer 1 included in the adhesive tape 10 of the above-described embodiment, and then the plurality of voids are voids 14 included in the first surface 12 and the second surface 13 area of the substrate layer 1 included in the adhesive tape 10 of the above-described embodiment.

In an embodiment, the strip-shaped substrate in the step S10 may be prepared by selecting an adaptive method according to the material type and material characteristics of the strip-shaped substrate, such as compression molding.

Step S20:

the adhesive layer formed in step S20 is the adhesive layer 2 included in the adhesive tape 10 of the above-described application example. Thus, the step S20 of forming forms the adhesive layer 2 including the adhesive tape 10 of the embodiment of the application of the text above in terms of the shape, size, and composition of the adhesive layer.

In the embodiment, when the band-shaped substrate is a band-shaped film in the step S10 and the grooves are formed on two opposite surfaces of the band-shaped film, the adhesive layer is formed in the step S20 by forming the adhesive on the two surfaces of the band-shaped film, and the adhesive layers are formed on each surface respectively, so as to obtain the double-sided tape as shown in fig. 2.

Of course, the grooves may be formed on one of the surfaces, and the adhesive layer is formed on one of the surfaces of the strip-shaped film by the adhesive in step S20, and the adhesive layer is formed on the surface provided with the grooves, so as to obtain the adhesive tape as shown in fig. 1.

When the adhesive layer formed in step S20 contains the filler 24 in the second adhesive layer 22 and the third adhesive layer 23 as shown in fig. 1 and 2, in an embodiment, the adhesive of step S20 includes a first adhesive, a second adhesive, and a third adhesive, wherein the second adhesive, the third adhesive contain the filler. The first, second and third adhesives may comprise the adhesive binder component of adhesive layer 2 of adhesive tape 10 of the example of the application. The second adhesive and the third adhesive contain fillers which may be fillers in the second adhesive layer 22 and the third adhesive layer 23 in the adhesive layer 2 included in the adhesive tape 10 of the embodiment of the above-mentioned application. The content ratio of the filler in the second adhesive and the third adhesive should be ensured in the formed second adhesive layer 22 and third adhesive layer 23.

After the first adhesive, the second adhesive and the third adhesive form a film layer on the surface of the tape-shaped substrate, specifically, the first adhesive fills the grooves to form a first adhesive layer, and the first adhesive layer 21 is contained in the adhesive tape 10 according to the embodiment of the application; forming a film layer on the surface of the strip-shaped substrate at one side of the groove by a second adhesive to obtain a second adhesive layer, and forming a second adhesive layer 22 on the first surface 12 of the strip-shaped substrate at one side of the groove by the second adhesive in combination with fig. 1 and 2; forming a film layer on the surface of the strip-shaped substrate at the other side of the groove by a third adhesive to obtain a third adhesive layer, and forming a third adhesive layer 23 on the second surface 13 of the strip-shaped substrate at one side of the groove by the third adhesive in combination with fig. 1 and 2; and the first adhesive layer is respectively bonded and connected with the second adhesive layer and the third adhesive layer into a whole, namely the adhesive layer 2 contained in the adhesive tape 10 of the embodiment of the application of the text is formed. Since the second binder and the third binder contain the filler, the second adhesive layer and the third adhesive layer correspondingly formed contain the filler.

In the embodiment, the method of forming the film layer on the surface of the tape-shaped substrate by the adhesive may be a coating method, but other film forming methods are also possible.

Of course, the second binder and the third binder may contain a filler in any of the binders.

In some embodiments, when the adhesive tape 10 according to the embodiment of the present application further includes the release film layer 3 as shown in fig. 4, after step S20, a step of attaching a release film to the outer surface of the formed adhesive layer is further included. So that the release film plays a role in protecting the outer surface of the adhesive layer.

In some embodiments, when the adhesive tape 10 according to the embodiment of the present application further includes the release film layer 3 and the wear-resistant layer 4 as shown in fig. 5, after step S20, a step of attaching a release film to the outer surface of one formed adhesive layer and attaching a wear-resistant layer to the outer surface of the other formed adhesive layer is further included. The release film has a protective effect on the outer surface of the adhesive layer, and the wear-resistant layer can be used as the outer surface of the adhesive tape and contacted with the surfaces of other parts to realize the effects of isolation, protection, insulation and the like.

Application of adhesive tape

The structure of the tape 10 and the method of making the same are based on the above-described application examples. The adhesive tape 10 of the embodiment of the present application can be applied to fields including batteries, automotive interiors, battery Management Systems (BMS), mobile phones, and the like. In particular, the tape 10 of the above-described embodiment is used to bond to the corresponding locations of the products where the tape is required, particularly where the products have a bend. Accordingly, the present embodiments provide products including, for example, batteries, power devices, energy storage devices, etc., as described below that include the tape 10 of the embodiments of the present application.

A battery:

in a third aspect, embodiments of the present application also provide a battery. The battery of the present embodiment includes an adhesive tape, and the adhesive tape is the adhesive tape 10 of the embodiment of the above text application. Therefore, the adhesive tape 10 contained in the battery of the embodiment of the application has high and stable adhesive strength with the corresponding attachment interface, and the edge of the adhesive tape 10 is not easy to generate the bad phenomenon of curling and warping. Thereby improving the performance of the battery including insulation stability and the like, and thus improving the stability, safety and the like of the battery including operation.

In some embodiments, the battery of the embodiments of the present application may include any one of a battery cell, a battery module, and a battery pack.

The battery cell is a battery cell including a battery case and an electrode assembly encapsulated in the battery case. The shape of the battery cell is not particularly limited, and may be cylindrical, square, or any other shape. In an exemplary embodiment, the battery cell may be a square-structured battery cell 30 as shown in fig. 6, which includes a square-shaped battery housing 31.

Generally, an insulating film is further provided on the outer surface of the battery cell case. In an embodiment, the adhesive tape 10 included in the battery cell according to the embodiment of the present application is a double-sided adhesive tape as shown in fig. 2, wherein one surface of the double-sided adhesive tape is adhered to the outer surface of the battery cell casing, and the other surface of the double-sided adhesive tape is adhered to the surface of the insulating film, that is, the double-sided adhesive tape is adhered between the outer surface of the battery cell casing and the insulating film. The section of the double-sided adhesive tape bonded to the outer surface of the battery cell casing contains a bending portion, as shown in fig. 6, which is the outer surface of the transition region where two adjacent side walls of the square battery casing 31 are connected. Wherein the outer surface of the transition region of the battery case 31 is an arcuate outer surface at which the adhesive tape 10 is adhered. The tape 10 was tested to be able to bond stably to the arcuate outer surface without edge lifting. In addition, the length of the groove 11 of the adhesive tape 10 can be flexibly designed according to the arc width, so that the effect of reducing the edge folding stress is achieved.

Of course, the adhesive tape 10 may be bonded to the outer surface of the battery case 31 at a right angle transition region. The stress at which the tape 10 is attached to the right-angled folds is much smaller than at the outer surface of the curved transition region (also referred to as the folds of the arc) of the battery case 31.

At this time, the first adhesive layer 21 of one adhesive layer 2 of the double-sided tape is adhered to the outer surface of the transition area where the two adjacent side walls are connected, the second adhesive layer 22 of the adhesive layer 2 is adhered to the surface of one of the two adjacent side walls, and the third adhesive layer 23 of the adhesive layer 2 is adhered to the surface of the other side wall. The other adhesive layer 2 included in the double-sided tape is adhered to an insulating film (which is not shown in fig. 6) covering the outer surface of the battery cell case. Like this, the adhesive layer 2 that contains of double-sided tape can effectively bond the insulating film on the lateral wall of square battery casing 31, wherein, the first adhesive layer 21 that double-sided tape contains bonds the junction at square battery casing 31 two adjacent lateral walls, namely the thinned interval of substrate layer 1 that double-sided tape contains is in the junction of two adjacent lateral walls and has taken place to buckle, the reduced interval of substrate layer 1 has effectively reduced the dog-ear stress that substrate layer 1 takes place to buckle and produce, thereby can obviously strengthen adhesive strength and stability that adhesive tape 10 contains second adhesive layer 22 and third adhesive layer 23 and square battery casing 31 lateral wall surface, thereby strengthen adhesive strength and stability of the adhesive interface between tape 10 and square battery casing 31, the insulating film, can obviously reduce adhesive tape 10 and adhesive interface and take place the bad phenomenon of edge curling perk.

Of course, the adhesive tape 10 may be adhered to other positions of the surface of the prismatic battery case 31, such as the bottom surface and the side surfaces of the prismatic battery case 31.

The battery module is assembled from the battery cells 30, that is, may contain a plurality of the battery cells 30, and the specific number may be adjusted according to the application and capacity of the battery module. In some embodiments, fig. 7 is a schematic diagram of a battery module 40 as one example. As shown in fig. 7, in the battery module 40, a plurality of battery cells 30 may be sequentially arranged in the longitudinal direction of the battery module 40. Of course, the arrangement may be performed in any other way. The plurality of battery cells 30 may be further secured by fasteners.

The adhesive tape 10 included in the battery module according to the embodiment of the present application may be a double-sided adhesive tape as shown in fig. 2. The double-sided adhesive tape is adhered to the positions including the positions between two adjacent battery cells 30 or between the battery cells 30 and the fixing support, and is used for fixing the positions of the battery cells 30 or the battery modules, so that the structural stability of the battery modules or the position fixing stability of the battery modules is improved.

The adhesive tape 10 included in the battery module according to the embodiment of the present application may also be a double-sided adhesive tape as shown in fig. 4. Before use, the release film layer 3 is separated from the surface of the adhesive layer 2, and the adhesive layer 2 is adhered to the bottom and the side wall surface of the battery module, for example, the first adhesive layer 21 in the adhesive layer 2 is adhered to the outer surface of the transition region where the bottom and the side wall are connected, the second adhesive layer 22 in the adhesive layer 2 is adhered to the bottom surface, and the third adhesive layer 23 in the adhesive layer 2 is adhered to the side wall surface. At this time, the wear-resistant layer 4 is exposed and can be abutted against components such as a fixing bracket of the battery module, so that the battery module is isolated, protected, insulated and the like.

The battery pack is assembled from the above battery cells 30, that is, may contain a plurality of battery cells 30, wherein a plurality of the battery cells 30 may be assembled into the above battery module. The specific number of battery cells 30 or battery modules included in the battery pack may be adjusted according to the application and capacity of the battery pack. Also, the adhesive tape 10 included in the battery pack according to the embodiment of the present application may be a double-sided adhesive tape as shown in fig. 2. The double-sided adhesive tape is adhered to the positions including between two adjacent battery monomers 30, between two adjacent battery modules, between the battery monomers 30 and the fixing support, between the battery modules and the fixing support and the like and is used for fixing the positions of the battery monomers 30, the battery modules, the battery packs and the like, so that the structural stability of the battery packs or the position fixing stability of the battery packs is improved.

And (3) an electricity utilization device:

in a fourth aspect, an embodiment of the present application further provides an electrical apparatus. The power utilization device comprises a power supply unit or an energy storage unit, and can also comprise other auxiliary components or necessary components. Wherein the power supply unit or energy storage unit comprises a battery according to the embodiments of the application. The power supply unit or energy storage unit may contain one or more batteries. When a plurality of batteries are provided, a plurality of batteries may be formed into a battery module or a battery pack. Because the power utilization device of the embodiment of the application contains the battery of the embodiment of the application, the power supply unit or the energy storage unit of the power utilization device of the embodiment of the application has excellent performances such as insulation property, working stability and the like, so that the stability, safety and the like of the power utilization device including the working are improved.

In an embodiment, the electric device in the embodiment of the application includes a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or the like. To meet the high power and high energy density requirements of the power device, a battery pack or battery module may be employed.

The power utilization device of the embodiment of the application as another example can also be a mobile phone, a tablet computer, a notebook computer and the like. The electric device is required to be light and thin, and a secondary battery can be used as a power source.

An energy storage device:

in a fifth aspect, embodiments of the present application also provide an energy storage device that includes an energy storage unit, although other auxiliary components or necessary components may be included. Wherein the energy storage unit comprises the battery of the embodiment of the application of the text above. The energy storage unit may contain one or more batteries. When a plurality of batteries are provided, a plurality of batteries may be formed into a battery module or a battery pack. Because the energy storage device comprises the battery of the embodiment of the application, the energy storage unit of the energy storage device has excellent performance including insulation performance, working stability and the like, so that the stability, safety and the like of the energy storage device including the working are improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (17)

1. An adhesive tape, includes substrate layer and with the sticky layer of the surface lamination bonding of substrate layer, its characterized in that: grooves are formed in the surface of the substrate layer laminated with the adhesive layer, and the grooves are formed along the length direction of the adhesive tape; the surface of the adhesive layer laminated with the substrate layer extends into the trench and fills the trench.

2. The tape of claim 1, wherein: the substrate layer is provided with two surfaces which are oppositely arranged, each surface of the substrate layer is provided with the groove, and each surface of the substrate layer is laminated and bonded with the adhesive layer.

3. The tape of claim 2, wherein: the grooves arranged on one surface of the substrate layer are symmetrically arranged with the grooves arranged on the other surface.

4. A tape according to any one of claims 1 to 3, wherein: the trench includes at least one of the following (1) to (3):

(1) The depth of the groove is 1-15 mu m;

(2) The width of the groove is 0.5-30 mm;

(3) The ratio of the width of the groove to the surface width of the base material layer is 0.1 to 0.8:1.

5. a tape according to any one of claims 1 to 3, wherein: the trench includes at least one of the following (1) to (3):

(1) The depth of the groove is 3-10 mu m;

(2) The width of the groove is 0.5-15 mm;

(3) The ratio of the width of the groove to the surface width of the base material layer is 0.1 to 0.5:1.

6. a tape according to any one of claims 1 to 3, wherein: and a plurality of holes are formed in the surfaces of the substrate layers at two sides of the groove.

7. The tape of claim 6, wherein the aperture comprises at least one of the following (1) to (4):

(1) The diameter of the pore is 0.1-10 mu m;

(2) The depth of the pores is 1-30 mu m along the direction from the surface of the substrate layer to the bottom of the groove;

(3) The plurality of pore formations comprise at least one of a grid structure and an array distribution;

(4) The cross section of the individual apertures comprises at least one of hexagonal, rectangular, circular, prismatic, triangular.

8. The tape of claim 6, wherein the aperture comprises at least one of the following (1) to (2):

(1) The diameter of the pore is 0.1-5 mu m;

(2) And the depth of the pores is 5-25 mu m along the direction from the surface of the substrate layer to the bottom of the groove.

9. A tape according to any one of claims 1 to 3, wherein: the thickness of the substrate layer is 1-10 mu m.

10. A tape according to any one of claims 1 to 3, wherein: the thickness of the substrate layer is 3-8 mu m.

11. A tape according to any one of claims 1 to 3, wherein: the adhesive layers laminated and adhered on the two side surfaces of the groove contained in the substrate layer are end adhesive layers, and the thickness of the end adhesive layers is 1-15 mu m.

12. A tape according to any one of claims 1 to 3, wherein: the adhesive layers laminated and adhered on the two side surfaces of the groove contained in the substrate layer are end adhesive layers, and the thickness of the end adhesive layers is 1-10 mu m.

13. A tape according to any one of claims 1 to 3, wherein: the release film layer is attached to the surface of the adhesive layer, which is away from the substrate layer;

or (b)

The substrate layer has two surfaces of relative setting, every of substrate layer the surface all stacks up and bonds have the gluing layer, one of them the gluing layer deviates from laminate on the surface of substrate layer has from the rete, another the gluing layer deviates from laminate on the surface of substrate layer has the wearing layer.

14. A battery comprising the tape of any one of claims 1 to 13.

15. The battery of claim 14, wherein the battery comprises any one of a battery cell, a battery module, and a battery pack.

16. An electrical device comprising a power supply unit or an energy storage unit, the power supply unit or energy storage unit containing a battery comprising the battery of claim 14 or 15.

17. An energy storage device comprising an energy storage unit, the energy storage unit comprising a battery comprising the battery of claim 14 or 15.