Pull tab strap and method of making pull tab strap

Abstract

A pull tab strap and a method of manufacturing the pull tab strap are provided. The pull tab strap is to be disposed in a battery powered terminal device. The pull tab tape includes: a seating portion on which the battery is seated, the seating portion having an adhesive surface facing the battery and having an area smaller than an area of the battery on the seating portion; and a tab portion exposed to the outside with respect to a surface facing the surface of the seating portion on which the battery is seated when the battery is seated in the terminal device.

Description

[0001] This application claims priority and benefit to Korean Patent Application No. 10-2024-0134372, filed on October 2, 2024, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] An aspect of the embodiments of this disclosure relates to a pull tab and a method of manufacturing a pull tab. Background Technology

[0003] Unlike primary batteries, which are not designed for recharging, secondary batteries are designed for discharging and recharging. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders, while high-capacity secondary batteries are widely used as power sources for driving motors in hybrid or electric vehicles and for energy storage. A secondary battery typically includes an electrode assembly containing positive and negative electrodes (or composed of positive and negative electrodes), a housing of the electrode assembly, and terminals connected to the electrode assembly.

[0004] In battery-powered terminal devices (such as smartphones or tablets), a pull tab can be provided between the battery mounting section on which the battery is mounted and the battery. The pull tab may have a connecting piece exposed when the battery is installed in the terminal device. Therefore, the user can easily remove the battery from the terminal device by pulling the exposed connecting piece. This pull tab typically has an adhesive surface on which the battery is placed for attachment. The opposing surface of the adhesive surface on which the battery is mounted is attached to the mounting section using double-sided adhesive tape. However, if the terminal device is twisted during use, the adhesive surface of the pull tab on which the battery is mounted may detach and reattach. Furthermore, the adhesive surface of the pull tab is prone to detachment if the terminal device is dropped.

[0005] The information disclosed in this background section is intended to enhance the understanding of the background of this disclosure, and therefore may contain information that does not constitute related (or prior art). Summary of the Invention

[0006] Embodiments of this disclosure provide a pull tab strip having an adhesive surface with an area smaller than that of a battery on the pull tab strip.

[0007] However, the aspects and features of this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the following description of this disclosure other aspects and features not expressly mentioned herein.

[0008] According to an embodiment of the present disclosure, a pull tab is disposed in a battery-powered terminal device. The pull tab includes: a mounting portion on which a battery is mounted, the mounting portion having an adhesive surface facing the battery and having an area smaller than that of the battery on the mounting portion; and a connector portion, which, when the battery is mounted in the terminal device, exposes to the outside the surface of the connector portion facing the mounting portion on which the battery is mounted.

[0009] The adhesive surface of the mounting part can be in its central area, or at multiple corners of the mounting part where the battery is mounted.

[0010] The adhesive surface can be formed by multiple adhesive points on the mounting portion, and the multiple adhesive points can be on the central area of ​​the mounting portion on which the battery is mounted, and can be at multiple corner portions of the mounting portion on which the battery is mounted.

[0011] Several corner sections of the installation department can be removed from the installation department.

[0012] The mounting part may have a strong adhesive line at a portion of the adhesive surface, and the strong adhesive line has a stronger adhesiveness than other parts of the adhesive surface.

[0013] The strong adhesive line of the mounting part can be at the edge of the adhesive surface.

[0014] The strong adhesive line of the mounting part can extend through the adhesive surface in an X shape.

[0015] The strong adhesive line of the mounting part can be located at a certain distance from the edge of the adhesive surface inside the mounting part.

[0016] The pull tab may also include a side cover that extends around the side of the battery.

[0017] The side cover may have an exhaust port, through which the displaced air passes when the battery is placed on the mounting section.

[0018] According to another embodiment of this disclosure, a method for manufacturing a pull tab for placement in a battery-powered terminal device includes the following steps: manufacturing a strip including a mounting portion and a connector portion, wherein a battery is mounted on the mounting portion, and the connector portion is exposed to the outside with respect to the surface of the mounting portion on which the battery is mounted when the battery is mounted; and forming an adhesive surface on the mounting portion having an area smaller than the area of ​​the battery on the surface of the mounting portion.

[0019] The step of forming the adhesive surface may include forming the adhesive surface of the mounting portion on the central region of the surface of the mounting portion on which the battery is mounted, and not forming it at the multiple corner portions of the surface of the mounting portion on which the battery is mounted.

[0020] The step of forming an adhesive surface may include forming a plurality of adhesive points to form the adhesive surface inside the surface of the mounting portion on which the battery is mounted, rather than forming it at a plurality of corner portions of the surface of the mounting portion on which the battery is mounted.

[0021] The method may also include removing multiple corner sections from the placement section.

[0022] The method may also include forming a strong adhesive line on a portion of the adhesive surface of the placement part, the strong adhesive line having a stronger adhesiveness than other portions of the adhesive surface.

[0023] The step of forming a strong adhesive line may include forming a strong adhesive line at the edge of the adhesive surface on the placement part.

[0024] The step of forming a strong adhesive line may include forming the strong adhesive line on the placement part in an X-shape that extends through the adhesive surface.

[0025] The step of forming a strong adhesive line may include forming a strong adhesive line on the placement part at a certain distance from the edge of the adhesive surface.

[0026] The steps of manufacturing the strip may include forming a side cover that extends around the side of the battery.

[0027] The steps of manufacturing the strip including the side cover portion may include forming an exhaust port in the side cover portion, through which displaced air passes when the battery is placed on the mounting portion.

[0028] According to embodiments of this disclosure, an adhesive surface with an area smaller than that of the battery is formed on the surface on which the battery is disposed. Therefore, when the terminal device on which the battery is mounted is twisted, seams can be prevented from forming when the adhesive surface on the pull tab where the battery is disposed detaches and reattaches.

[0029] According to embodiments of this disclosure, when the terminal device is dropped, the adhesive surface of the pull tab rarely detaches because a strong adhesive line with a stronger adhesive force than other parts of the adhesive surface is formed in a portion of the adhesive surface.

[0030] According to embodiments of this disclosure, dimensional defects or undesirable appearances can be avoided by preventing the formation of air bubbles through an vent formed in a side cover portion extending around the side of the battery, through which displaced air can escape when the battery is placed on the mounting portion.

[0031] However, the aspects and features of this disclosure are not limited to those described above, and those skilled in the art will clearly understand other aspects and features not mentioned from the detailed description below. Attached Figure Description

[0032] The accompanying drawings illustrate embodiments of the present disclosure and, together with the detailed disclosure, further describe the technical spirit of the present disclosure. Therefore, this disclosure should not be construed as limited to the contents described in these drawings.

[0033] Figure 1A and Figure 1B This is a schematic diagram of a pouch-type lithium secondary battery.

[0034] Figure 2 This diagram illustrates the removal of the battery from the terminal device via a pull tab.

[0035] Figure 3 This is a picture of a regular film puller.

[0036] Figure 4 This is a side sectional view of a conventional pull tab used in terminal devices.

[0037] Figure 5 This is a side sectional view showing the twisting of the terminal device while a conventional pull strip is applied to it.

[0038] Figure 6 This is a side cross-sectional view showing the situation where the terminal device is twisted while the pull strip is applied to the terminal device according to an embodiment of the present disclosure.

[0039] Figure 7 This is a diagram of the adhesive surface of the mounting section of a conventional pull tab.

[0040] Figure 8 This is a diagram illustrating a pull tab according to an embodiment of the present disclosure.

[0041] Figure 9 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0042] Figure 10 This is a side cross-sectional view of the terminal device twisting while the pull strip is applied to the terminal device according to an embodiment of the present disclosure.

[0043] Figure 11 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0044] Figure 12 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0045] Figure 13 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0046] Figure 14 This is a flowchart describing a method for manufacturing a pull strip according to an embodiment of the present disclosure. Detailed Implementation

[0047] Embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Before description, it should be noted that the terms or words used in this specification and claims should not be construed as limited to their ordinary or dictionary meanings, but rather should be understood to have meanings and concepts consistent with the spirit of this disclosure, based on the principle that the inventor can appropriately define the concept of each term in order to describe his / her own invention in the best possible way. Therefore, since the embodiments described in this specification and the constructions shown in the drawings are merely examples of this disclosure and do not cover all the technical concepts of this disclosure, it should be understood that various changes and modifications can be made when filing this application.

[0048] It will also be understood that when the terms “including / comprise” and / or variations thereof are used herein, it indicates the presence of the stated features, integers, steps, operations, elements, components and / or groups thereof, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0049] For ease of understanding of this disclosure, the drawings are not drawn to scale, and the dimensions of some components may be exaggerated. It should be noted that the same reference numerals are assigned to the same components in different embodiments.

[0050] Referring to two compared elements, features, etc., as "identical" means that they are "substantially identical." Therefore, the phrase "substantially identical" can include what is considered a low deviation in the art, for example, about 5% or less. The uniformity of any parameter in a given region can refer to its uniformity from an average perspective.

[0051] Although terms such as “first” and / or “second” are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another. Therefore, unless explicitly stated to the contrary, a first component may be referred to as a second component without departing from the teachings of the exemplary embodiments.

[0052] Throughout the specification, unless otherwise stated, each element may be singular or plural.

[0053] Arranging any component "above (or below)" or "on (or under)" a component can mean that any component is positioned to contact the upper (or lower) surface of that component, and that other components can be positioned between that component and any components positioned on (or below) that component.

[0054] What will be understood is that when a component is referred to as “connected,” “joined,” or “attached” to another component, it can be directly “connected,” “joined,” or “attached” to the other component, and it can also be indirectly “connected,” “joined,” or “attached” to the other component, with other elements placed between them.

[0055] As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. When describing embodiments of this disclosure, the use of “may” refers to “one or more embodiments of this disclosure.” Expressions such as “at least one” and “one or more” preceding a list of elements modify the entire list of elements, but not individual elements within that list.

[0056] Throughout the specification, when “A and / or B” is stated, it means A, B, or A and B unless otherwise stated. Similarly, when “C to D” is stated, it means C or greater and D or less unless explicitly stated otherwise.

[0057] When phrases such as “at least one of A, B and C (species / beings)”, “at least one of A, B or C (species / beings)”, “at least one of the group selected from A, B and C (species / beings)” or “at least one of A, B and C (species / beings)” are used to specify a list of elements A, B and C, the phrase can refer to any and all suitable combinations.

[0058] The term “use” may be considered synonymous with the term “utilization”. As used herein, the terms “substantially,” “about,” and similar terms are used as approximations rather than terms of degree and are intended to explain the inherent variations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art.

[0059] It will be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first region, first layer, or first portion discussed below may be referred to as a second element, second component, second region, second layer, or second portion.

[0060] For ease of explanation, when describing the relationship between one element or feature as shown in the accompanying drawings and another element or feature(s), spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein. It will be understood that, in addition to the orientations depicted in the drawings, spatial relative positions are intended to encompass different orientations of the device in use or operation. For example, if the device in the drawings is flipped, any element described as “below” or “under” another element will subsequently be oriented “above” or “above” another element. Thus, the term “below” can encompass both upward and downward directions.

[0061] The terminology used herein is for the purpose of describing embodiments of this disclosure and is not intended to limit the disclosure.

[0062] The types of secondary batteries mentioned herein include coin-shaped, cylindrical, prismatic, and pouch-shaped. Before describing embodiments of this disclosure, pouch-shaped secondary batteries will be generally described because embodiments of this disclosure can be readily applied to pouch-shaped secondary batteries. However, this disclosure is not limited thereto, and embodiments of this disclosure can be applied to other types of batteries. Reference Figure 1A and Figure 1B The pouch-type secondary battery may include an electrode assembly 40 in which a separator 30 is disposed between a first electrode plate 10 and a second electrode plate 20, and a housing 50 in which the electrode assembly 40 is housed (or embedded). The first electrode plate 10, the second electrode plate 20, and the separator 30 may be immersed in an electrolyte. The pouch-type secondary battery may also include electrode terminals 70, which serve as electrical channels for moving current formed in (or stored in) the electrode assembly 40 toward the outside. The electrode terminals 70 may include a first electrode terminal 71 and a second electrode terminal 72.

[0063] The electrode assembly 40 can be formed by winding or stacking a stack comprising a first electrode plate 10, a second electrode plate 20, and a diaphragm 30, each of which is formed in a plate shape or a membrane shape. In a wound electrode assembly, the winding axis of the electrode assembly 40 can be parallel to the length direction of the housing. Furthermore, the electrode assembly 40 can be stacked rather than wound, but the shape of the electrode assembly 40 is not limited in the embodiments of this disclosure. The first electrode plate 10 of the electrode assembly 40 can be used as a positive electrode, and the second electrode plate 20 of the electrode assembly 40 can be used as a negative electrode, and vice versa.

[0064] The first electrode plate 10 can be formed by applying a first electrode active material, such as graphite or carbon, to a first electrode current collector formed of a metal foil, such as copper, copper alloy, nickel, or nickel alloy, and may include a first electrode terminal piece (e.g., a first uncoated portion) (i.e., the area where the first electrode active material is not applied).

[0065] The second electrode plate 20 can be formed by applying a second electrode active material, such as a transition metal oxide, to a second electrode current collector formed of a metal foil such as aluminum or an aluminum alloy, and may include a second electrode terminal piece (e.g., a second uncoated portion) (i.e., an area where the second electrode active material is not applied).

[0066] The diaphragm 30 can prevent short circuits between the first electrode plate 10 and the second electrode plate 20, while allowing lithium ions to move between the first electrode plate 10 and the second electrode plate 20. For example, the diaphragm 30 may include a polyethylene membrane, a polypropylene membrane, or a polyethylene-polypropylene membrane (or may be composed of a polyethylene membrane, a polypropylene membrane, or a polyethylene-polypropylene membrane).

[0067] The housing 50 may be a laminated film or a bag-shaped (or molded) plastic material. The housing 50 is sealed at a sealing portion where the electrode assembly 40 is housed between them while their edges contact each other. The housing 50 is sealed while the electrode terminals 70, or positive electrode terminal 71 and negative electrode terminal 72, are between the sealing portions. The sealing portions of the housing 50 are made of a thermoplastic material and have a structure that achieves sealing by bonding the thermoplastic layers together.

[0068] Figure 2 This diagram illustrates the removal of the battery from the terminal device using a pull tab.

[0069] Reference Figure 2 In a terminal device 1 (such as a smartphone or tablet computer) powered by battery 2, a pull tab 80 may be provided between the battery mounting portion on which battery 2 is mounted and the battery 2. A connector that is exposed to the outside when battery 2 is installed in the terminal device 1 may be formed in the pull tab 80. Therefore, when the exposed connector is pulled to remove battery 2, the user can easily remove (e.g., detach) battery 2 because the connector 2 is attached to it.

[0070] Figure 3 This is a diagram showing a standard pull tab. Figure 4 This is a side cross-sectional view showing a conventional pull tab used in a terminal device. Figure 5 This is a side sectional view showing the twisting of the terminal device while a conventional pull strip is applied to it.

[0071] Reference Figures 3 to 5The pull tab 80 may have a mounting portion 81 on which the battery 2 is mounted, a terminal portion 82 that is exposed to the outside when the battery 2 is mounted (e.g., exposed or extended beyond the battery 2), and a side cover portion 83 that extends around the side of the battery 2 (or covers the side of the battery 2).

[0072] like Figure 4 As shown, the pull tab 80 can be attached to the battery 2 via an adhesive surface having a surface corresponding to the area on which the battery 2 is disposed. The rear surface opposite to the surface on which the battery 2 is disposed can be attached to the tape mounting portion 1-1 via double-sided tape 3.

[0073] like Figure 5 As shown, when the terminal device 1 is twisted during use, a seam may be created when the adhesive surface on the pull tab 80, on which the battery 2 is mounted, detaches and reattaches. Furthermore, the adhesive surface of the pull tab 80 is prone to detachment when the terminal device 1 is dropped. For example, as... Figure 5 As shown, frequent occurrences of bonding or detachment of the adhesive surface at the corner of the surface on which the battery 2 is mounted occur.

[0074] Figure 6 This is a side cross-sectional view showing the situation where the terminal device is twisted while the pull strip is applied to the terminal device according to an embodiment of the present disclosure.

[0075] Reference Figure 6 According to embodiments of the present disclosure, the adhesive surface of the pull tab strip can be formed on the surface of the pull tab strip on which the battery 2 is disposed (e.g., the inner surface), rather than at the multiple corner portions of the surface of the pull tab strip 100 on which the battery 2 is disposed, thereby avoiding the phenomenon of bonding or the phenomenon of the adhesive surface detaching at the corner portions of the surface on which the battery 2 is disposed. Embodiments of the pull tab strip according to embodiments of the present disclosure are described below with reference to the accompanying drawings based on this concept.

[0076] Figure 7 This is a diagram of the mounting section for a standard pull-tab belt.

[0077] Reference Figure 7 The adhesive surface can be formed in a conventional pull tab 80 relative to (or corresponding to) the entire surface on which the battery 2 is disposed (i.e., the area of ​​the battery 2). Therefore, bonding phenomena or detachment of the adhesive surface at corner portions of the surface on which the battery 2 is disposed may occur (as described above). Figure 5 (The phenomenon described).

[0078] Figure 8 This is a diagram illustrating a pull tab according to an embodiment of the present disclosure. Figure 9 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0079] Reference Figure 8 and Figure 9 According to embodiments of the present disclosure, the pull tab 100 may have a placement portion 110, a wiring portion 120, and a side cover portion 130.

[0080] The mounting portion 110 can be located at the position where the battery 2 is mounted. An adhesive surface having an area smaller than that of the battery 2 can be formed on the surface of the mounting portion 110 where the battery 2 is mounted. In some embodiments, for example, such as... Figure 8 As shown, the adhesive surface of the mounting portion 110 can be formed inside the surface on which the battery 2 is mounted (e.g., the central portion), without forming multiple corner portions on the surface on which the battery 2 is mounted. Figure 9 It shows the relationship with Figure 8 The embodiment shown is compared to the embodiment with a larger adhesive surface facing multiple corner portions.

[0081] In some embodiments, a plurality of adhesive points may be formed on the adhesive surface of the mounting portion 110. The plurality of adhesive points may be formed inside the surface on which the battery is mounted (e.g., the central region), rather than at the corner portions of the surface on which the battery is mounted. For example, the plurality of adhesive points may be formed on the adhesive surface of the mounting portion 110.

[0082] When the battery 2 is placed, the surface of the connector portion 120 may be exposed to the outside (e.g., it may extend beyond the periphery of the battery 2 or be outside the periphery of the battery 2). When the exposed connector portion 120 is pulled, the user can easily remove (e.g., detach) the battery 2 because the connector portion 120 holds the battery 2 (e.g., it is removed together with the battery 2).

[0083] The side cover portion 130 may surround (or may extend around) the side of the battery 2. The side cover portion 130 may grip the side of the battery 2 so that the pull tab 100 according to an embodiment of the present disclosure is not pulled out.

[0084] Figure 10 This is a side cross-sectional view of the terminal device when the pull strip is applied to the terminal device according to an embodiment of the present disclosure, showing the twisting situation.

[0085] Reference Figure 10 The corner portion of the surface on which the battery 2 is disposed of on the mounting portion 110 can be removed from the pull tab 100 according to an embodiment of the present disclosure (or the corner portion of the surface on which the battery 2 is disposed of on the mounting portion 110 may not be adhesive). Therefore, it will not be like Figure 6 The same phenomenon occurs as shown in the diagram, where the adhesive surface detaches at the corner of the surface on which the battery 2 is mounted. Figure 10In the embodiment shown, the corner portion of the surface on which the battery 2 is mounted can be removed, that is, the cause of the main occurrence of bonding phenomena or detachment of adhesive surfaces can be eliminated.

[0086] Figure 11 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0087] Reference Figure 11 As indicated by A, multiple corner portions of the surface on which the battery 2 is disposed can be removed from the placement portion 110 of the pull tab 100 according to an embodiment of the present disclosure. In the illustrated embodiment, the corner portions at the upper left, upper right, lower left, and lower right regions are removed, but the present disclosure is not limited thereto.

[0088] Furthermore, a strong adhesive line 111 having a stronger adhesiveness than other parts of the adhesive surface can be formed on a portion (or part) of the adhesive surface of the placement portion 110 of the pull tab 100 according to an embodiment of the present disclosure. For example... Figure 11 As shown, the strong adhesion line 111 can be formed at the edge of the adhesive surface or in a portion of the interior of the adhesive surface.

[0089] In the following text, reference will be made to Figure 12 and Figure 13 An embodiment is described in which a strong adhesive line 111 is formed on the adhesive surface of the placement portion 110, and a pull tab 100 is provided.

[0090] Figure 12 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0091] Reference Figure 12 A strong adhesive line 111 may be formed at the edge of the adhesive surface of the placement portion 110 of the pull tab 100 according to an embodiment of the present disclosure. Furthermore, the strong adhesive line 111 on the placement portion 110 may be formed to pass through (e.g., extend through) the adhesive surface in an X-shape. The X-shaped strong adhesive line 111 can reduce the area of ​​the adhesive surface that detaches when the terminal device 1 is twisted or impacted. The X-shaped strong adhesive line 111 can reduce the area of ​​the adhesive surface that detaches by up to approximately 20%. In such an embodiment, the strong adhesive line 111 may have a width in the range of approximately 1.0 mm to approximately 2.0 mm.

[0092] Figure 13 This is a diagram illustrating a pull tab according to another embodiment of the present disclosure.

[0093] Reference Figure 13According to an embodiment of the present disclosure, a strong adhesive line 111 on the placement portion 110 of the pull tab 100 can be formed within the placement portion 110 at a certain distance from the edge of the adhesive surface (e.g., formed at a predetermined distance from the edge of the adhesive surface). When the strong adhesive line 111 is formed within the placement portion 110 at a certain distance from the edge of the adhesive surface as described above, because the strong adhesive force is formed towards the interior (or center) of the adhesive surface, the adhesive force between the battery 2 and the adhesive surface increases, and the separation force decreases. Figure 13 As shown, when the adhesive surface of the placement portion 110 is formed by multiple adhesive points, and the strong adhesive line 111 is formed inside (or inwardly) three adhesive points from the edge of the adhesive surface, the separation force can be reduced by up to approximately 30% compared to a conventional pull tab. Furthermore, in order to increase or maximize the adhesive strength enhancement effect of the strong adhesive line 111, the strong adhesive line 111 may include two or more lines.

[0094] Furthermore, in some embodiments, an vent (e.g., an opening) 131 may be formed in the side cover portion 130 of the pull tab 100 according to embodiments of the present disclosure, through which displaced air when the battery 2 is placed in the placement portion 110 may escape. Conventionally, when the battery 2 is placed in the placement portion 110, if the contact area between the battery 2 and the pull tab is increased, air bubbles may form. Therefore, dimensional defects or appearance defects may occur. Therefore, because the side cover portion 130 of the pull tab 100 according to embodiments of the present disclosure has an vent 131, the formation of air bubbles can be reduced or prevented, thereby allowing displaced air when the battery 2 is placed in the placement portion 110 to escape through the vent. The vent 131 may be formed in the side cover portion 130 to form (or provide) a flow channel through which air can move. In some embodiments, the vents 131 may each have a width of about 1 mm and may be arranged at intervals of about 5 mm.

[0095] Figure 14 This is a flowchart describing a method for manufacturing a pull strip according to an embodiment of the present disclosure.

[0096] Reference Figure 14 The method for manufacturing a pull strip according to an embodiment of the present disclosure may include steps S210 and S220.

[0097] Step S210 may be a step of manufacturing a strip, the strip including a mounting portion on which a battery will be mounted, a terminal piece portion with its surface facing the surface of the mounting portion on which the battery is mounted when the battery is mounted on the mounting portion exposed to the outside, and a side cover portion extending around the side of the battery. In some embodiments, step S210 may include a step of forming a vent in the side cover portion through which displaced air is discharged when the battery is mounted in the mounting portion.

[0098] Step S220 may be a step of forming an adhesive surface with an area smaller than that of the battery on the surface on which the battery is mounted. In some embodiments, step S220 may include the step of forming an adhesive surface inside the surface on which the battery is mounted (or toward the center of the surface on which the battery is mounted), except at a plurality of corner portions of the surface on which the battery is mounted. Furthermore, in some embodiments, step S220 may include the step of forming a strong adhesive line with a stronger adhesiveness than other portions of the adhesive surface in a portion of the adhesive surface.

[0099] A method for manufacturing a pull tab according to embodiments of the present disclosure has been described with reference to the flowcharts presented in the accompanying drawings. For simplicity, the method has been shown and described as a series of blocks; however, the present disclosure is not limited to the order of the blocks, and some blocks may be performed in a different order or simultaneously than the other blocks shown and described in this specification. Various other branches, flow paths, and orders of blocks can be implemented to obtain the same or similar results. Furthermore, not all blocks need to be shown to implement the method described in this specification.

[0100] In reference Figure 14 In the given description, according to the implementation examples of this disclosure, each step can be further subdivided into additional steps, or the steps can be combined into fewer steps. Furthermore, some steps can be omitted if necessary, and the order of the steps can be changed. Moreover, although some content is omitted, Figures 1A to 13 The content can be applied to Figure 14 The content. In addition. Figure 14 The content can be applied to Figures 1A to 13 The content.

[0101] Materials that can be used in secondary batteries according to embodiments of this disclosure are described below.

[0102] Compounds capable of reversibly inserting and deintercalating lithium (e.g., lithiation intercalation compounds) can be used as positive electrode active materials. For example, one or more composite oxides of lithium and metals selected from cobalt, manganese, nickel, and combinations thereof can be used as positive electrode active materials.

[0103] The composite oxide can be a lithium transition metal composite oxide. Detailed examples of composite oxides may include lithium nickel oxides, lithium cobalt oxides, lithium manganese oxides, lithium iron phosphate compounds, cobalt-free lithium nickel manganese oxides, or combinations thereof.

[0104] For example, a compound represented by one of the following chemical formulas can be used: Li a A 1-b X b O2-c D c (0.90≤a≤1.8,0≤b≤0.5,0≤c≤0.05);Li a Mn 2-b X b The 4-c D c (0.90≤a≤1.8,0≤b≤0.5,0≤c≤0.05);Li a Ni 1-b-c Co b X c The 2-α D α (0.90≤a≤1.8,0≤b≤0.5,0≤c≤0.5,0<α<2);Li a Ni 1-b-c Mn b X c The 2-α D α (0.90≤a≤1.8,0≤b≤0.5,0≤c≤0.5,0<α<2);Li a Ni b Co c L 1 d G e O2(0.90≤a≤1.8,0≤b≤0.9,0≤c≤0.5,0≤d≤0.5,0≤e≤0.1);Li a NiG b O2(0.90≤a≤1.8,0.001≤b≤0.1);Li a CoG b O2(0.90≤a≤1.8,0.001≤b≤0.1);Li a Mn 1-b G b O2(0.90≤a≤1.8,0.001≤b≤0.1);Li a Mn2G b O4(0.90≤a≤1.8,0.001≤b≤0.1);Li a Mn 1-g G g PO4(0.90≤a≤1.8,0≤g≤0.5);Li (3-f) Fe2(PO4)3(0≤f≤2); and Li a FePO4 (0.90≤a≤1.8).

[0105] In the chemical formula, A can be Ni, Co, Mn, or a combination thereof. X can be Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, rare earth elements, or a combination thereof; D can be O, F, S, P, or a combination thereof. G can be Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V, or a combination thereof. L 1 can be Mn, Al, or a combination thereof.

[0106] The positive electrode for a lithium secondary battery may include a current collector and a positive electrode active material layer formed on the current collector. The positive electrode active material layer may include a positive electrode active material and may further include a binder and / or a conductive material.

[0107] With respect to 100 wt.% of the positive electrode active material layer, the content of the positive electrode active material may be in the range of about 90 wt.% to about 99.5 wt.%. With respect to 100 wt.% of the positive electrode active material layer, the contents of the binder and the conductive material may each be in the range of about 0.5 wt.% to about 5 wt.%.

[0108] Al can be used as the current collector, but the present disclosure is not limited thereto.

[0109] The negative electrode active material may include a material capable of reversibly intercalating / deintercalating lithium ions, lithium metal, an alloy of lithium metal, a material capable of doping and dedoping lithium, or a transition metal oxide.

[0110] Materials capable of reversibly intercalating / deintercalating lithium ions may include carbon-based negative electrode active materials, for example, crystalline carbon, amorphous carbon, or a combination thereof. Examples of crystalline carbon may include graphite, such as natural graphite or synthetic graphite. Examples of amorphous carbon may include soft carbon or hard carbon, mesophase pitch carbide, and calcined coke.

[0111] Si-based negative electrode active materials or Sn-based negative electrode active materials may be used as materials capable of doping and dedoping lithium. Si-based negative electrode active materials may be silicon, a silicon-carbon composite, SiO x (0 < x ≤ 2), a Si-based alloy, or a combination thereof.

[0112] The silicon-carbon composite may be a composite of silicon and amorphous carbon. According to an embodiment, the silicon-carbon composite may include silicon particles and may have a form in which amorphous carbon has been coated on the surface of the silicon particles.

[0113] The silicon-carbon composite may further include crystalline carbon. For example, the silicon-carbon composite may include a core and an amorphous carbon coating layer, the core including crystalline carbon and silicon particles, and the amorphous carbon coating layer being provided on the surface of the core.

[0114] The negative electrode for a lithium secondary battery may include a current collector and a negative electrode active material layer disposed on the current collector. The negative electrode active material layer may include a negative electrode active material, and may also include a binder and / or a conductive material.

[0115] For example, the negative electrode active material layer may include a negative electrode active material in the range of about 90 wt.% to about 99 wt.%, a binder in the range of about 0.5 wt.% to about 5 wt.%, and a conductive material in the range of 0 wt.% to about 5 wt.%.

[0116] Non-aqueous adhesives, aqueous adhesives, dry adhesives, or combinations thereof can be used as adhesives. If an aqueous adhesive is used as the adhesive for the negative electrode, the adhesive for the negative electrode may further include a cellulose-based compound capable of imparting viscosity.

[0117] A current collector selected from nickel foil, stainless steel foil, titanium foil, nickel foam, copper foam, polymer matrix coated with conductive metal, and combinations thereof can be used as the current collector for the negative electrode.

[0118] Electrolytes used in lithium secondary batteries may include non-aqueous organic solvents and lithium salts.

[0119] Non-aqueous organic solvents can act as a medium through which ions participating in the electrochemical reactions of a battery can move.

[0120] Non-aqueous organic solvents can be carbonate solvents, ester solvents, ether solvents, ketone solvents, alcohol solvents, aprotic solvents, or combinations thereof. As non-aqueous organic solvents, carbonate solvents, ester solvents, ether solvents, ketone solvents, alcohol solvents, or aprotic solvents can be used alone, or two or more of them can be mixed and used.

[0121] In addition, if carbonate solvents are used, cyclic carbonates and chain carbonates can be mixed.

[0122] Depending on the type of lithium-ion secondary battery, a separator can be present between the positive and negative electrodes. Polyethylene, polypropylene, and polyvinylidene fluoride, or multilayers having two or more of these layers, can be used as separators.

[0123] The membrane may include a porous substrate and a coating layer comprising organic, inorganic, or combinations thereof disposed on one or both sides of the porous substrate.

[0124] Organic substances may include polymers such as polyvinylidene fluoride or (meth)acrylic acid polymers.

[0125] Inorganic substances may include inorganic particles selected from Al2O3, SiO2, TiO2, SnO2, CeO2, MgO, NiO, CaO, GaO, ZnO, ZrO2, Y2O3, SrTiO3, BaTiO3, Mg(OH)2, boehmite and combinations thereof, but this disclosure is not limited thereto.

[0126] Organic and inorganic substances can be in the form in which organic and inorganic substances are mixed in a coating layer, or in the form in which a coating layer including organic substances and a coating layer including inorganic substances are stacked.

[0127] Although this disclosure has been described above with reference to embodiments illustrated in the accompanying drawings, this disclosure is not limited to the embodiments described herein. Those skilled in the art to which this disclosure pertains can modify and alter this disclosure within the spirit and equivalent scope of the appended claims.

[0128] Description of some figure labels 100: Tape puller 110: Resettlement Department 111: Strong adhesive thread 120: Wiring tab section 130: Side cover 131: Exhaust port.

Claims

1. A pull tab, the pull tab being disposed in a battery-powered terminal device, the pull tab comprising: A mounting portion on which the battery is mounted, the mounting portion having an adhesive surface facing the battery and having an area smaller than that of the battery on the mounting portion; as well as The connector portion, when the battery is placed in the terminal device, has its surface facing the surface of the placement portion where the battery is placed exposed to the outside.

2. The pull strip according to claim 1, wherein, The adhesive surface of the mounting portion is located in the central region of the mounting portion, and not at the multiple corner portions of the mounting portion where the battery is mounted.

3. The pull strip according to claim 2, wherein: The adhesive surface is formed by a plurality of adhesive points on the mounting portion, and The plurality of adhesive points are located in the central region of the mounting portion on which the battery is mounted, and not at the plurality of corner portions of the mounting portion on which the battery is mounted.

4. The pull strip according to claim 2, wherein, The plurality of corner portions of the mounting section are removed from the mounting section.

5. The pull strip according to claim 2, wherein, The mounting portion has a strong adhesive line at a part of the adhesive surface, the strong adhesive line having a stronger adhesiveness than other parts of the adhesive surface.

6. The pull strip according to claim 5, wherein, The strong adhesive line of the placement part is located at the edge of the adhesive surface.

7. The pull strip according to claim 5, wherein, The strong adhesive line of the placement part extends through the adhesive surface in an X-shape.

8. The pull strip according to claim 5, wherein, The strong adhesive line of the placement part is located at a certain distance from the edge of the adhesive surface within the placement part.

9. The pull tab strip according to claim 1, wherein the pull tab strip further comprises a side cover extending around the side of the battery.

10. The pull tab strip according to claim 9, wherein, The side cover has an exhaust port, through which displaced air is passed when the battery is placed on the mounting portion.

11. A method for manufacturing a pull tab strip, the pull tab strip being disposed in a battery-powered terminal device, the method comprising the following steps: A strip is manufactured comprising a mounting portion and a connector portion, wherein the battery is mounted on the mounting portion, and the connector portion is exposed to the outside with respect to the surface of the mounting portion facing the surface on which the battery is mounted when the battery is mounted; as well as An adhesive surface is formed on the mounting portion, the adhesive surface having an area smaller than the area of ​​the battery on the surface of the mounting portion.

12. The method according to claim 11, wherein, The step of forming the adhesive surface includes: forming the adhesive surface of the mounting portion on the central region of the surface of the mounting portion on which the battery is mounted, and not forming it at the multiple corner portions of the surface of the mounting portion on which the battery is mounted.

13. The method according to claim 12, wherein, The step of forming the adhesive surface includes: forming a plurality of adhesive points to form the adhesive surface inside the surface of the placement portion on which the battery is placed, and not at the plurality of corner portions of the surface of the placement portion on which the battery is placed.

14. The method of claim 12, further comprising removing the plurality of corner portions from the placement portion.

15. The method of claim 12, further comprising forming a strong adhesive line on a portion of the adhesive surface of the placement portion, the strong adhesive line having a stronger adhesiveness than other portions of the adhesive surface.

16. The method according to claim 15, wherein, The step of forming the strong adhesive line includes forming the strong adhesive line on the placement portion at the edge of the adhesive surface.

17. The method according to claim 15, wherein, The step of forming the strong adhesive line includes forming the strong adhesive line on the placement portion in an X-shape extending through the adhesive surface.

18. The method according to claim 15, wherein, The step of forming the strong adhesive line includes forming the strong adhesive line on the placement portion at a certain distance from the edge of the adhesive surface.

19. The method according to claim 11, wherein, The step of manufacturing the strip includes forming a side cover that extends around the side of the battery.

20. The method according to claim 19, wherein, The step of manufacturing the strip including the side cover portion includes: forming an exhaust port in the side cover portion, through which displaced air passes when the battery is placed on the mounting portion.

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