Electronic device

Abstract

The utility model discloses electronic equipment, and belongs to the technical field of batteries, the electronic equipment comprises a display screen, a shell and a battery, the display screen and the shell are enclosed to form a mounting cavity, and the battery is arranged in the mounting cavity; the first side surface, facing the display screen, of the battery is covered with a gummed paper layer, and the second side surface, facing the shell, of the battery is provided with a hot melt adhesive layer. The gummed paper layer at least covers the first area of the battery, the first area is opposite to the gravity center of the electronic equipment, and the gummed paper layer bypasses the edge of the battery from the first side surface and extends to the second side surface.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to an electronic device. BACKGROUND

[0002] With the development of battery technology, lithium batteries have become an indispensable part of life, which provides stable power support for our daily communication, entertainment and other activities. In the process of using electronic devices, the situation of accidentally dropping the electronic device occurs from time to time. The electronic device hits the ground in various postures, and even falls on sharp objects. The strong impact force will be transmitted to the internal lithium battery through the external structure of the electronic device. Such impact may cause the lithium battery to be damaged to varying degrees, for example: in the case of forming a dent deformation on the front surface of the battery, the cell tab on the back surface of the battery is easily stretched to produce a crack, resulting in low safety of the lithium battery. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the application is to provide an electronic device to solve the problem that in the related art, in the case of forming a dent deformation on the front surface of the lithium battery, the cell tab on the back surface of the battery is easily stretched to produce a crack.

[0004] The embodiment of the application provides an electronic device, which comprises a display screen, a shell and a battery, the display screen and the shell enclose to form a mounting cavity, and the battery is arranged in the mounting cavity.

[0005] The first side surface of the battery facing the display screen is covered with a layer of adhesive paper, and the second side surface of the battery facing the shell is provided with a hot melt adhesive layer.

[0006] The layer of adhesive paper covers at least a first area of the battery, the first area is opposite to the center of gravity of the electronic device, and the layer of adhesive paper further extends from the first side surface to the second side surface around the edge of the battery.

[0007] In the embodiment of the present application, the electronic device comprises a display screen, a shell and a battery, the display screen and the shell enclose a mounting cavity, and the battery is arranged in the mounting cavity; a first side surface of the battery facing the display screen is covered with a layer of adhesive paper, and a second side surface of the battery facing the shell is provided with a layer of hot melt adhesive; the layer of adhesive paper covers at least a first area of the battery, the first area is opposite to the center of gravity of the electronic device, and the layer of adhesive paper further extends from the first side surface to the second side surface around the edge of the battery. By arranging the layer of adhesive paper on the first side surface of the battery facing the display screen and arranging the layer of hot melt adhesive on the second side surface of the battery facing the shell, when the battery is impacted from one side of the shell, the layer of hot melt adhesive can play a buffering role, and in the process of transmitting the impact force from the second side surface to the first side surface of the battery, the position of the battery close to the first side surface will be subjected to a stretching force outward from the impact point, and in the embodiment of the present application, the layer of adhesive paper provides a tension to the first side surface of the battery, so as to weaken the stretching force outward from the impact point, thereby reducing the risk of tearing of the pole piece in the battery caused by the stretching force and improving the safety performance of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a schematic diagram of the deformation of the multilayer pole piece in the battery when the battery is impacted;

[0009] Figure 2 is a schematic diagram of the shell being impacted when the electronic device falls;

[0010] Figure 3 is a schematic diagram of the electronic device provided by some embodiments of the present application in the process of the shell being impacted;

[0011] Figure 4 is a schematic diagram of the battery in the electronic device provided by some embodiments of the present application;

[0012] Figure 5 is a schematic diagram of the structure of the battery in the electronic device provided by some embodiments of the present application;

[0013] Figure 6 is Figure 5 is an expanded view of the layer of adhesive paper in the battery shown in FIG. 8;

[0014] Figure 7 is a schematic diagram of the structure of the battery in the electronic device provided by some embodiments of the present application;

[0015] Figure 8 is Figure 7 is an expanded view of the layer of adhesive paper and the layer of adhesive in the battery shown in FIG. 10;

[0016] Figure 9 is a schematic diagram of the structure of the battery in the electronic device provided by some embodiments of the present application;

[0017] Figure 10 is Figure 9 the unfolded view of the adhesive paper layer and the adhesive winding layer in the battery shown in FIG. 4;

[0018] Figure 11 is a fourth structural schematic diagram of a battery provided by an embodiment of the present application;

[0019] Figure 12 is Figure 11 the unfolded view of the adhesive paper layer and the adhesive winding layer in the battery shown in FIG. 4;

[0020] Figure 13 is a schematic diagram of the relative positions of the adhesive paper layer and the camera decoration ring in the battery in the electronic device provided by the present application;

[0021] Figure 14 is a first structural schematic diagram of the adhesive paper layer in the battery in the electronic device provided by some embodiments of the present application;

[0022] Figure 15 is a second structural schematic diagram of the adhesive paper layer in the battery in the electronic device provided by some embodiments of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0024] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the front and rear associated objects.

[0025] In order to facilitate the understanding of the electronic device provided by the embodiments of the present application, the related technologies, terms and terminologies are explained and described.

[0026] The advantages of lithium batteries are obvious, and the high energy density of lithium batteries enables electronic devices such as mobile phones to be small and portable while also having long-lasting power, meeting the needs of people to use electronic devices anytime and anywhere.

[0027] However, the high energy density of lithium batteries, while bringing many conveniences, also poses hidden dangers. For example, if the protection measures of lithium batteries are not in place or the user operates improperly, it is easy to cause the lithium battery to fail. In a slight case, it may be battery leakage, and in a serious case, it may cause combustion or even explosion, posing a threat to the personal safety of the user. Therefore, while enjoying the convenience brought by lithium batteries, the potential risks cannot be ignored, and protection and correct use are crucial.

[0028] For example, when an electronic device with a lithium battery is hit by a sharp object, the battery back cover of the electronic device may be impacted, which may cause the lithium battery to be damaged to varying degrees, such as forming a dent deformation.

[0029] For example, taking a mobile phone with a lithium battery as an example, during the daily use of the mobile phone, the mobile phone accidentally slips and falls from time to time, and after the mobile phone slips, it may hit the ground in various postures, or even fall onto a sharp object. The powerful impact force generated by the sharp object will be transmitted to the internal lithium battery through the external structure of the mobile phone, such as the battery back cover. This impact may cause the lithium battery to be damaged to varying degrees, such as forming a dent deformation on the front surface of the battery facing the battery back cover. As the drop height increases, the impact energy borne by the lithium battery also increases in direct proportion, causing the dent deformation formed on the lithium battery to become more and more serious. At this time, the lithium battery will go through the process of local slight deformation, local large deformation, local micro-short circuit, local serious short circuit, and even overall thermal runaway as the drop height increases. Even after the drop, the lithium battery does not immediately appear the phenomenon of violent combustion caused by thermal runaway, the powerful impact force may also cause the pole piece to break, especially the pole piece near the side of the battery facing away from the impact surface is more prone to breakage due to stretching. For example, as shown in FIG. 1, when the battery is hit by a sharp object 200, a dent 104 is formed on the front surface of the battery, and a protrusion deformation corresponding to the dent deformation is generated on the back surface of the battery. It is worth mentioning that the pole piece 101 in the battery is not easily damaged by compression force, but is easily damaged by stretching force. Among them, the dent deformation is subjected to compression force, and the protrusion deformation is subjected to stretching force, causing the pole piece 101 near the back surface of the battery to be more prone to breakage or tearing. Figure 1

[0030] The pole piece is usually made of metal foil, and after breaking, it will form a sharp edge. When this position is hit again, or during the expansion and contraction deformation in the charging and discharging process of the lithium battery, these sharp edges may tear the separator, thereby causing a short circuit and further inducing thermal runaway. This is one of the main reasons why damaged lithium batteries are prone to combustion during charging.

[0031] ​In the embodiment of the present application, the adhesive paper layer is arranged on the first side surface of the battery facing the display screen, and the hot melt adhesive layer is arranged on the second side surface of the battery facing the shell. When the battery is impacted from one side of the shell, the hot melt adhesive layer can play a buffering role. During the process of transmitting the impact force from the second side surface to the first side surface of the battery, the position of the battery close to the first side surface will be subjected to the stretching force outward from the impact point. In the embodiment of the present application, the adhesive paper layer provides the tension to the first side surface of the battery, which is used to weaken the stretching force outward from the impact point, thereby reducing the risk of tearing of the pole piece in the battery caused by the stretching force and improving the safety performance of the battery.

[0032] The electronic device provided by the embodiment of the present application will be described in detail in combination with the drawings, specific embodiments and application scenarios.

[0033] Referring to Figure 2 and Figure 3 The electronic device provided by the embodiment of the present application comprises a display screen 2, a shell 10 and a battery 1. The display screen 2 and the shell 10 enclose an installation cavity, and the battery 1 is arranged in the installation cavity.

[0034] The first side surface 14 of the battery 1 facing the display screen 2 is covered with an adhesive paper layer 3, and the second side surface 15 of the battery 1 facing the shell 10 is provided with a hot melt adhesive layer 4.

[0035] The adhesive paper layer 3 covers at least a first region of the battery 1, the first region is opposite to the center of gravity of the electronic device, and the adhesive paper layer 3 further extends from the first side surface 14 to the second side surface 15 around the edge of the battery 1. It can be understood that the position of the center of gravity of the electronic device is the most easily impacted position, i.e. the dangerous region, when falling. Therefore, in order to effectively protect the battery 1, the adhesive paper layer 3 needs to cover the region where the center of gravity of the electronic device is located, so as to reduce the risk of damage caused by falling of the battery 1.

[0036] In some embodiments, the electronic device can be a terminal or other device than a terminal. For example, the electronic device can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a Mobile Internet Device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. The electronic device can also be a server, a Network Attached Storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc. The embodiments of the present application are not limited in this regard.

[0037] For ease of illustration, the electronic device is taken as a mobile phone in the embodiments of the present application. In this case, as shown in Figure 1 Figure 2 The shell 10 is a battery back cover of the mobile phone.

[0038] In some embodiments, the adhesive paper layer 3 and the hot melt adhesive layer 4 can be respectively attached to the opposite sides of the cell in the battery 1. The battery 1 includes a separator film 11, a pole piece 12, and a tab 13. The separator film 11 and the pole piece 12 are stacked and constitute the main structure of the battery 1. The pole piece 12 is electrically connected to the tab 13. In this case, the aluminum plastic film can wrap the battery 1, the adhesive paper layer 3, and the hot melt adhesive layer 4, and the tab 13 is exposed to the aluminum plastic film.

[0039] In some embodiments, the battery 1 in the embodiments of the present application can be a lithium battery. Of course, the embodiments of the present application can also be applied to other batteries 1 with pole pieces, such as nickel hydroxide. For ease of illustration, the lithium battery is taken as an example in the embodiments of the present application.

[0040] In some embodiments, the pole piece 12 in the battery 1 includes a metal foil, such as an aluminum foil or a copper foil.

[0041] In some embodiments, as shown in Figure 4 and Figure 5 The pole piece 12 of the battery 1 includes a positive pole piece 121 and a negative pole piece 122. The corresponding tab 13 includes a positive tab 131 and a negative tab 132. The positive tab 131 is electrically connected to the positive pole piece 121, and the negative tab 132 is electrically connected to the negative pole piece 122.

[0042] In some embodiments, the positive electrode tab 121 is coated with a positive electrode active material, the negative electrode tab 122 is coated with a negative electrode active material, and the separator film 11 is used to separate the positive electrode tab 121 and the negative electrode tab 122 and allow lithium ions to pass through. At this time, the separator film 11 is arranged in layers with the electrode tab 12, and can be arranged with the separator film 11 sandwiched between the positive electrode tab 121 and the negative electrode tab 122. In some embodiments, the main structure of the battery 1 can be classified into two categories, namely a jelly-roll structure and a stacked structure.

[0043] In the case where the main structure of the battery 1 is a jelly-roll structure, the separator film 11, the positive electrode tab 121, and the negative electrode tab 122 are arranged in layers in the order of positive electrode tab 121-separator film 11-negative electrode tab 122 and wound into a cylindrical or square structure, thereby forming a jelly-roll structure.

[0044] In the case where the main structure of the battery 1 is a stacked structure, the separator film 11, the positive electrode tab 121, and the negative electrode tab 122 are also arranged in layers in the order of positive electrode tab 121-separator film 11-negative electrode tab 122, thereby forming a stacked structure.

[0045] For ease of illustration, in the embodiments of the present application, the battery 1 is usually taken as an example to be illustrated by using a jelly-roll process, which does not constitute a specific limitation.

[0046] In some embodiments, the adhesive paper layer 3 can be any adhesive paper with tensile or tear resistance, such as polypropylene (PP) or polyethylene (PE) adhesive paper, and the material of the adhesive paper layer 3 is not limited to this. At least part of the adhesive paper layer 3 is adhered to the first side surface 14 of the battery 1, and the adhesive paper layer 3 can improve the tensile and tear resistance of the battery 1 near the first side surface 14 of the display screen 2. For example, the mechanical strength and durability of the metal foil with a high-strength adhesive paper layer 3 can be improved, so that when the second side surface 15 of the battery 1 is subjected to an impact force, a dent is generated on the second side surface 15, and the area of the battery 1 near the first side surface 14 is deformed to form a protrusion, and a tensile force is generated from the impact point to the outside, the adhesive paper layer 3 can provide a tensile force to resist the tensile force, thereby reducing the risk of tensile fracture of the electrode tab 12 near the first side surface 14 in the battery 1. The structure of the electronic device and the battery 1 and the appearance design of the electronic device do not need to be changed, and a new process does not need to be introduced in the production and preparation process of the battery 1. With minimal modification, higher reliability is achieved, and the safety performance of the battery 1 is significantly improved.

[0047] In some embodiments, when the battery 1 is assembled into an electronic device, the first side surface 14 of the battery 1 faces the display screen 2, and the second side surface 15 of the battery 1 faces the battery back cover. In this way, when the electronic device is impacted by an external object, the adhesive paper layer 3 is located on the side of the battery 1 that faces away from the impact, so that when the side of the battery 1 that faces away from the impact is impacted and bulges to generate a tensile force, the tensile resistance of the side of the battery 1 that faces away from the impact can be improved by the tensile force provided by the adhesive paper layer 3, and the risk of tensile fracture of the pole piece 12 on the side of the battery 1 that faces away from the impact can be reduced.

[0048] In some embodiments, the adhesive paper layer 3 can cover the entire first side surface 14 of the battery 1 or cover a partial area of the first side surface 14 of the battery 1.

[0049] It is worth mentioning that the adhesive paper layer 3 also extends from the first side surface 14 to the second side surface 15 around the edge of the battery 1. In this way, on the one hand, the adhesive paper layer 3 also has a positioning effect on the pole piece 12 and the separator film 11 in the battery cell, limiting the relative movement of the pole piece 12 and the separator film 11. In addition, when the edge of the adhesive paper layer 3 is bent and extends to the second side surface 15, compared with the way of attaching the adhesive paper layer 3 to the first side surface 14 of the battery 1, the overall tensile force of the adhesive paper layer 3 can be improved by the area of the adhesive paper layer 3 that is adhered to the second side surface 15, thereby further improving the tensile resistance of the side of the battery 1 that faces away from the impact.

[0050] As an optional embodiment, as shown in Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 or Figure 15 , the adhesive paper layer 3 comprises a main body part 31 and a wrapping part 32.

[0051] The main body part 31 is attached to the first side surface 14, one end of the wrapping part 32 that faces the main body part 31 is attached to the first side surface 14, and the other end of the wrapping part 32 that faces away from the main body part 31 is attached to the second side surface 15 around the edge of the battery 1.

[0052] And the wrapping part 32 and the main body part 31 cover different areas of the surface of the battery 1.

[0053] In this embodiment, the wrapping part 32 and the main body part 31 cover different areas of the surface of the battery 1, so that the main body part 31 can be arranged in the thickness space of the battery 1 for arranging the wrapping part 32 without increasing the overall thickness of the battery 1.

[0054] In some embodiments, as shown in Figure 6 or Figure 11As shown, the wrapping adhesive portion 32 is integrally formed with the main body portion 31.

[0055] In this embodiment, the wrapping adhesive portion 32 is integrally formed with the main body portion 31, for example, by using the same adhesive paper, and the wrapping adhesive portion 32 extends outward from the edge of the main body portion 31. In this way, the structure of the adhesive paper layer 3 can be simplified, and the wrapping adhesive portion 32 and the main body portion 31 can be assembled by one-time pasting during assembly.

[0056] In other embodiments, as shown in Figure 7 and Figure 8 , the wrapping adhesive portion 32 is spaced apart from the main body portion 31.

[0057] In this embodiment, the wrapping adhesive portion 32 is spaced apart from the main body portion 31, and the two do not overlap. In this way, the wrapping adhesive portion 32 can be arranged on the main body portion 31 within the same thickness space on the surface of the battery 1, thereby reducing the thickness of the battery 1.

[0058] As an optional embodiment, as shown in Figure 7 , Figure 8 or Figure 15 , the main body portion 31 includes a first portion 311 and a second portion 312.

[0059] The first portion 311 is arranged on the second portion 312, the second portion 312 extends from the edge of the first portion 311 and extends to the second side surface 15 around the edge of the battery 1.

[0060] It should be noted that in this embodiment, the main body portion 31 further extends outwardly at the opposite side to form the second portion 312. In this way, when the first portion 311 is arranged on the first side surface 14, the second portion 312 can extend to the second side surface 15 around the edge of the battery 1, and the first portion 311 and the second portion 312 are integrally formed. In this way, the second portion 312 can be used to enhance the tension of the first portion 311, thereby further improving the tensile resistance of the side of the battery 1 opposite to the impact surface.

[0061] In some embodiments, the length of the second portion 312 along the first direction X is longer than the length of the first portion 311 along the first direction X, the first portion 311 and the second portions 312 located on the opposite sides of the first portion 311 form a receiving groove 30, and the coverage area of the wrapping adhesive portion 32 on the first side surface 14 of the battery 1 is located in the receiving groove 30.

[0062] In this embodiment, on the basis of satisfying the wrapping adhesive portion 32 and the main body portion 31 covering different areas of the surface of the battery 1, the area of the second portion 312 can be increased as much as possible, the edge area of the battery 1 covered by the second portion 312 is improved, and the reinforcing degree of the second portion 312 to the main body portion 31 is improved.

[0063] In some embodiments, when the battery 1 uses a wound cell, assuming the wound cell is wound or folded along the first direction, the wrapping portion 32 can be provided on opposite sides of the battery 1 along the first direction X, such as... Figure 7 The upper side 313 and lower side 314 are shown, and the second part 312 may be provided on the opposite two sides of the battery 1 along the first direction X.

[0064] In some embodiments, the number of adhesive wrapping portions 32 is at least two, and the at least two adhesive wrapping portions 32 are distributed on the edges of different sides of the battery 1.

[0065] For example, if the battery 1 uses a wound cell, assuming that the wound cell is wound or folded along the first direction, each of the opposite sides of the main body 31 extending along the first direction X is provided with at least one wrapping portion 32.

[0066] For example: Figure 7 As shown, a wrapping part 32 is provided on the upper side of the main body 31. The wrapping part 32 bends and extends around the top of the battery 1 to the second side surface 15 and is bonded to the second side surface 15. Two wrapping parts 32 are provided on the lower side of the main body 31. The two wrapping parts 32 bend and extend around the bottom of the battery 1 to the second side surface 15 and are bonded to the second side surface 15.

[0067] It should be noted that, as Figure 7 As shown, when the battery 1 adopts a wound cell structure, the separator 11 and the electrode 12 are stacked and wound around the first direction X to form a wound structure. At this time, the electrode 12 is prone to slippage along the first direction X, which makes the winding layers at the upper and lower ends of the wound structure uneven along the first direction X.

[0068] In this embodiment, the adhesive wrapping portion 32 can be used to limit the separation film 11 and electrode 12 inside the battery 1, preventing relative displacement of the separation film 11 and electrode 12 along the axial direction of the wound cell. It can also effectively transfer the tensile force on the first side surface 14 of the battery 1 to the second side surface 15 of the battery 1 and the end face located between the first side surface 14 and the second side surface 15, thereby further improving the reinforcing effect of the adhesive layer 3 on the electrode 12 inside the battery 1. Furthermore, by bending and extending the second portion 312 from the first side surface 14 of the battery 1 to the second side surface 15 and adhering to the second side surface 15, the tension on the first side surface 14 can be further enhanced, especially significantly increasing the tensile force on the first side surface 14 perpendicular to the first direction X, thereby further strengthening the protection against tearing of the electrode 12 inside the battery 1 due to tensile force.

[0069] In some embodiments, at least one second part 312 can be arranged at each side of the main body 31, and when the battery 1 receives an impact force along the thickness direction of the battery 1 so that the tab 12 near the first side surface 14 of the battery 1 is stretched, the first part 311 can cover the stretched area on the first side surface 14 to transmit the stretching force received by the battery 1 to the surrounding area, and the stretching force can be further transmitted to other positions on the battery 1 through the second part 312 connected to the side of the first part 311, so that the stretching force received by the first side surface 14 of the battery 1 can be transmitted to other positions on the battery 1 in a larger range, thereby further improving the reinforcing effect of the adhesive paper layer 3 on the tab 12 in the battery 1, and also limiting the relative displacement of the separator 11 and the tab 12 along the axial direction of the wound cell.

[0070] As an optional embodiment, as shown in Figure 9 、 Figure 10 , the wrapping adhesive part 32 includes a first segment 321, a second segment 322 and a third segment 323, the first segment 321 is attached to the first side surface 14, the second segment 322 is attached to the second side surface 15, the third segment 323 is attached to the first end surface 16 and / or the second end surface 17 of the battery 1, and the first segment 321 and the second segment 322 are connected through the third segment 323; the first end surface 16 and the second end surface 17 are two end surfaces of the battery 1 opposite along the first direction X.

[0071] In some embodiments, the wrapping adhesive part 32 has a U-shaped structure, which is wrapped around the end surface of the battery 1 from the first side surface 14 and adheres to the second side surface 15, so that the sliding of the tab 12 along the first direction X can be limited.

[0072] In some embodiments, the wrapping adhesive part 32 can be multiple and distributed at the edges of different sides of the battery 1.

[0073] For example, as shown in Figures 5 to 11 , the wrapping adhesive part 32 includes a first wrapping adhesive part 32A, a second wrapping adhesive part 32B and a third wrapping adhesive part 32C;

[0074] The first wrapping adhesive part 32A is arranged at the first side of the main body 31;

[0075] The second wrapping adhesive part 32B and the third wrapping adhesive part 32C are both arranged at the second side of the main body 31, and the second wrapping adhesive part 32B and the third wrapping adhesive part 32C have a gap therebetween;

[0076] Among them, the first side and the second side are opposite sides of the main body 31.

[0077] It should be noted that, in the embodiments of the present application, the first side and the second side are taken as the upper and lower sides of the main body 31 as examples for illustration, and in other embodiments, the first side and the second side can also be the left and right sides of the main body 31, which does not constitute a specific limitation.

[0078] In the present embodiment, by arranging three winding glue portions 32 distributed on opposite sides of the battery 1, the movement of the pole piece 12 and the separator 11 in the battery 1 in the direction of the interval along the first side and the second side can be strengthened, and by arranging the second winding glue portion 32B and the third winding glue portion 32C spaced apart on the second side of the main body 31, the rotation of the pole piece 12 and the separator 11 in the battery 1 around the vertical plane of the battery 1 can be limited, so that the structure of the battery 1 is more stable.

[0079] In some embodiments, as shown in Figure 5 and Figure 6 , the edge of the adhesive paper layer 3 can only be provided with the winding glue portion 32 without the second portion 312.

[0080] In other embodiments, as shown in Figure 7 and Figure 8 , the winding glue portion 32 and the second portion 312 can exist at the same time.

[0081] For example, as shown in Figure 7 and Figure 8 , the upper and lower ends of the adhesive paper layer 3 are provided with the winding glue portion 32 spaced apart from the first portion 311, and the left and right sides are provided with the second portion 312, at this time, the pole piece 12 can be limited to slide along the first direction X of the battery 1 by the winding glue portion 32, and the overall tension of the adhesive paper layer 3 can be improved by the second portion 312.

[0082] It should be noted that the winding glue portion 32 in an integral structure with the main body 31 is used to limit the pole piece 12 to slide along the first direction X, or the winding glue portion 32 spaced apart from the adhesive paper layer 3 is used to limit the pole piece 12 to slide along the first direction X, which can avoid stacking the adhesive paper layer 3 and the winding glue portion 32, thereby reducing the size in the thickness direction of the battery 1.

[0083] In some embodiments, the first side surface 14 is the shallow pit surface of the battery 1, and the second side surface 15 is the deep pit surface of the battery 1.

[0084] Among them, the aluminum plastic film outside the battery needs to be punched before packaging to cover the battery cell, and then hot-pressed packaging, and the side of the punch is called the deep pit surface, and the side opposite to the deep pit surface is the shallow pit surface.

[0085] In this embodiment, based on the scenario that the battery 1 is assembled in the electronic device, the deep pit surface of the battery 1 is generally directed to the battery back cover, and by arranging the adhesive paper layer 3 on the shallow pit surface of the battery 1, the adhesive paper layer 3 can provide tension to the surface of the battery 1 away from the battery back cover, so as to weaken the outward tension from the impact point, reduce the risk of tearing of the pole piece 12 in the battery 1 caused by the tension, and improve the safety performance of the battery 1.

[0086] In some embodiments, the housing 10 of the electronic device is provided with a camera decoration ring 5, the camera decoration ring 5 is arranged on the side surface of the housing 10 away from the display screen 2, the adhesive paper layer 3 also covers the second area of the battery 1, and the projection of the camera decoration ring 5 on the battery 1 is in the second area. Figure 13 As shown, it is a schematic view of the relative positions of the adhesive paper layer 3 in the battery 1 and the camera decoration ring 5 in the electronic device provided by the present application. As can be understood, since the camera decoration ring 5 protrudes from the surface of the housing 10, it is easy to collide with the ground when the electronic device falls, and the impact force is transmitted to the battery 1 inside the electronic device. Therefore, the projection area of the camera decoration ring 5 on the battery 1 is also a falling risk area of the battery 1. In order to better achieve falling protection, the adhesive paper layer 3 is arranged on the first side surface 14 of the battery 1, and the main part 31 of the adhesive paper layer 3 covers the second area of the battery 1. In this way, better protection can be formed for the battery 1, and the risk of deformation of the battery 1 when falling can be reduced.

[0087] In some embodiments, as shown in Figure 11 and Figure 12 The adhesive paper layer 3 is arranged with at least two air holes 33.

[0088] In this embodiment, in the process of pasting the adhesive paper layer 3 on the surface of the battery 1, it is possible that air bubbles are difficult to be discharged between the contact surface of the adhesive paper layer 3 and the battery 1 in the gluing process. By arranging at least two air holes 33 on the adhesive paper layer 3, the air bubbles between the contact surface of the adhesive paper layer 3 and the battery 1 can be discharged through the air holes 33.

[0089] Optionally, the air hole 33 is a long strip-shaped hole, and the length direction of the long strip-shaped hole is parallel to the length direction of the battery 1.

[0090] In some embodiments, in the case that the battery 1 adopts a winding body battery cell, the length direction of the battery 1 can be the winding direction of the winding battery cell, that is, the first direction X.

[0091] For example, the electronic device is usually rectangular structure, in order to save the assembly space inside the electronic device, usually the battery 1 and the circuit board (such as the main upper circuit board of the mobile phone) are arranged side by side along the length direction of the electronic device, at this time, the tab 13 can be located at one end of the first direction X, so that in the process of assembling the battery 1 into the electronic device, the battery 1 can be electrically connected with the circuit board arranged side by side with the battery 1 in the electronic device through the tab 13, at this time, the first direction X is consistent with the length direction of the electronic device and the length direction of the battery 1.

[0092] It should be noted that, due to the rigidity of the battery 1 along the length direction is less than the rigidity of the battery 1 along the width direction, so that the impact force is mainly the bending deformation along the length direction of the battery 1. In the embodiment, by making the length direction of the opening 33 parallel to the length direction of the battery 1, the weakening of the reinforcing effect of the opening 33 on the length direction of the battery 1 can be reduced, and the air between the adhesive paper layer 3 and the first side surface 14 can be discharged as much as possible under the premise of guaranteeing the reinforcing effect of the adhesive paper layer 3 on the length direction of the battery 1.

[0093] In some embodiments, as shown in Figure 14 The main body part 31 comprises a woven mesh structure A1;

[0094] The woven mesh structure A1 comprises a first woven strip B1 and a second woven strip B2, the first woven strip B1 and the second woven strip B2 are interlaced, the extension direction of the first woven strip B1 is parallel to the second side edge of the battery 1; the extension direction of the second woven strip B2 is parallel to the third side edge of the battery 1; the second side edge and the third side edge are two adjacent side edges of the battery 1.

[0095] In some of the above-mentioned ways, the air between the main body part and the first side surface 14 of the battery 1 can be discharged through the gap between the woven strips.

[0096] In the embodiment, through the first woven strip B1 parallel to the second side edge of the battery 1, the reinforcing effect of the first side surface 14 of the battery 1 in the extension direction of the second side edge can be improved; through the second woven strip B2 parallel to the third side edge of the battery 1, the reinforcing effect of the first side surface 14 of the battery 1 in the extension direction of the third side edge can be improved, so that the reinforcing effect of the battery 1 in the extension direction of each side edge can be improved.

[0097] In some embodiments, the woven mesh structure A1 can be pasted on the first side surface 14 of the battery 1.

[0098] In another embodiment, as shown in Figure 15As shown, the main body 31 further comprises a glue material structure A2, which is arranged at the outer periphery of the woven mesh structure A1 and adheres to the outer surface of the battery 1.

[0099] In this embodiment, the glue material structure A2 is arranged at the outer periphery of the woven mesh structure A1 to adhere the periphery of the woven mesh structure A1 to the first side surface 14 of the battery 1 through the glue material structure A2.

[0100] The electronic device provided by the embodiment of the present application can improve the anti-stretching force of the lithium battery against the impact surface when the battery back cover side of the electronic device receives an external force impact, thereby reducing the risk of stretching and breaking of the pole piece in the battery and improving the safety performance of the battery in the electronic device.

[0101] It should be noted that in this document, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0102] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope of protection of the claims, and all of them belong to the protection of the present application.

Claims

1. An electronic device, comprising: The electronic device comprises a display screen, a housing and a battery, the display screen and the housing enclose a mounting cavity, and the battery is arranged in the mounting cavity; A first side surface of the battery towards the display screen is covered with a layer of adhesive tape, and a second side surface of the battery towards the housing is provided with a layer of hot melt adhesive; The layer of adhesive tape covers at least a first area of the battery, the first area is opposite to the center of gravity of the electronic device, and the layer of adhesive tape further extends from the first side surface to the second side surface around the edge of the battery.

2. The electronic device of claim 1, wherein, The layer of adhesive tape comprises a main body portion and a wrapping portion; One end of the wrapping portion towards the main body portion is attached to the first side surface, and the other end of the wrapping portion away from the main body portion is attached to the second side surface around the edge of the battery; The wrapping portion and the main body portion cover different areas of the surface of the battery.

3. The electronic device of claim 2, wherein, The wrapping portion and the main body portion are in an integrated structure.

4. The electronic device of claim 2, wherein, The wrapping portion and the main body portion are arranged in a spaced manner.

5. The electronic device of claim 4, wherein, The main body portion comprises a first portion and a second portion; The first portion is attached to the first side surface, and the second portion is bent and extended from the edge of the first portion and extends to the second side surface around the edge of the battery.

6. The electronic device of claim 5, wherein, The length of the second portion in a first direction is longer than the length of the first portion in the first direction, the first portion and the second portions on the opposite sides of the first portion enclose a receiving groove, and the covering area of the wrapping portion on the first side surface of the battery is located in the receiving groove.

7. The electronic device of any of claims 2-5, wherein, The wrapping portion comprises a first wrapping portion, a second wrapping portion and a third wrapping portion; The first wrapping portion is arranged on a first side of the main body portion; The second wrapping portion and the third wrapping portion are arranged on a second side of the main body portion, and there is a gap between the second wrapping portion and the third wrapping portion; The first side and the second side are opposite sides of the main body portion.

8. The electronic device of any of claims 1-6, wherein, The layer of adhesive tape is provided with at least two openings in a spaced manner, the openings are in a strip shape, and the length direction of the openings is parallel to the length direction of the battery.

9. The electronic device of claim 1, wherein, The housing is further provided with a camera decoration ring, and the camera decoration ring protrudes from one side surface of the housing; The layer of adhesive tape also covers a second area of the battery, and the projection of the camera decoration ring on the battery is in the second area.

10. The electronic device of any of claims 2-6, wherein, The main body portion comprises a woven mesh structure; The woven mesh structure comprises a first woven strip and a second woven strip, the first woven strip and the second woven strip are interlaced, the extension direction of the first woven strip is parallel to a first side edge of the battery, the extension direction of the second woven strip is parallel to a second side edge of the battery, and the first side edge and the second side edge are adjacent side edges of the battery.

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