Electronic device

Abstract

An electronic device, comprising a housing and a battery, wherein the housing is provided with a battery cavity; the battery is installed in the battery cavity; an insulating layer is provided between at least some areas on an outer peripheral edge portion of the battery in the peripheral direction and the corresponding battery cavity, so as to electrically isolate the battery from the battery cavity; the insulating layer comprises a first insulating portion; the first insulating portion is formed by coating the outer side surfaces of the at least some areas on the outer peripheral edge portion or the inner side surface of the battery cavity with an insulative paint. By using this solution, the outer peripheral edge portion of the battery is insulated from the inner side surface of the battery cavity, and the first insulating portion can be made thinner, thereby reducing the volume occupied by the insulating layer. Therefore, a larger battery cell installation space is provided while battery cavities have a same internal space dimension, and thus more cells or a larger cell can be integrated, thereby improving the battery capacity, and solving the problem of electronic devices failing to satisfy standby power requirements while the thinness and lightness demands are satisfied.

Description

electronic devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 28, 2023, with application number: 202321667872.4 and application name: “Electronic Device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to an electronic device. Background Art

[0003] A battery refers to a cup, tank or other container or part of a composite container that contains an electrolyte solution and metal electrodes to generate an electric current. It is a device that can convert chemical energy into electrical energy. Currently, more and more electronic devices use batteries to provide them with power to achieve endurance. In the performance evaluation of various electronic devices, the endurance of an electronic device is an important indicator to measure the overall performance of the electronic device, and the endurance of an electronic device depends on the capacity of the battery it uses. Therefore, increasing the capacity of the battery is crucial to improving the endurance of electronic devices. Existing technologies increase the capacity of batteries by integrating as large a cell as possible into the battery. In other words, the larger the cell, the greater the capacity.

[0004] However, in the prior art, when a battery (for example, a lithium battery packaged in an aluminum-plastic film, also known as a soft-pack battery) is installed in a battery compartment of an electronic device, in order to prevent the battery casing (for example, a casing formed by an aluminum-plastic film) from directly contacting the battery compartment to cause an electrochemical reaction and thus electrical corrosion, an insulating film is usually wrapped around the entire outer periphery of the battery to electrically insulate the outer periphery of the battery from the corresponding battery compartment. For example, a PI film (polyimide film) is used to wrap the four outer edges of the battery (the PI film can wrap the side, bottom and top surfaces of the corresponding outer edges), and the bottom surfaces of other parts of the battery except the outer edges are bonded to the bottom surface of the battery compartment through an adhesive portion (back glue); alternatively, two oppositely disposed outer edges of the battery are wrapped with a PI film, and the other two oppositely disposed outer edges are wrapped with a wrapping film (easy-to-tear sticker), and the wrapping film covers the entire bottom surface of the battery and is bonded to the bottom surface of the battery compartment through the back glue. In the above two methods, when the internal space of the battery compartment (i.e., the battery installation space) is certain, the PI film or the wrapping film (the thickness of the PI film or the wrapping film is at least 50μm) will occupy a large volume of the battery, making the volume of the battery cell in the battery limited, resulting in the battery cell used when the battery is installed in the battery compartment of the electronic device having a limited volume and a low capacity.

[0005] Therefore, the electronic device in the prior art has the problem that when the battery is installed in the battery compartment, the volume of the battery cell is limited, resulting in a small battery capacity.

[0006] Summary of the Invention

[0007] An embodiment of the present application provides an electronic device that solves the problem in the prior art that when a battery is installed in a battery compartment of the electronic device, the volume of the battery cell is limited, resulting in a small battery capacity.

[0008] An embodiment of the present application provides an electronic device, including:

[0009] A housing, wherein the housing is provided with a battery compartment;

[0010] The battery is installed in the battery compartment, with the bottom surface of the battery facing the bottom surface of the battery compartment and the outer side surface of the battery facing the inner side surface of the battery compartment. The battery has an outer peripheral edge portion, the outer side surface of the outer peripheral edge portion constitutes the outer side surface of the battery, and the bottom surface of the outer peripheral edge portion constitutes a portion of the bottom surface of the battery;

[0011] Wherein, an insulating layer is provided between at least a portion of the peripheral edge of the battery along its circumference and the corresponding battery compartment to electrically isolate the battery from the battery compartment;

[0012] Furthermore, the insulating layer includes a first insulating portion, which is located between the outer side surface of at least a portion of the outer peripheral portion and the inner side surface of the corresponding battery compartment, and the first insulating portion is formed by coating insulating paint on the outer side surface of at least a portion of the outer peripheral portion or the inner side surface of the battery compartment.

[0013] With the above technical solution, since the first insulating portion is formed by applying insulating paint on the outer side of at least part of the area of ​​the outer peripheral portion or the inner side of the battery compartment. This can achieve insulation between the outer peripheral portion of the battery and the inner side of the battery compartment while making the first insulating portion thinner. For example, the thickness of the first insulating portion can be between 20μm and 30μm. Compared with the solution in which the entire outer peripheral portion of the battery is coated with an insulating film (for example, a PI film, or a PI film and an easy-to-tear wrapping film, the thickness of the insulating film is at least 50μm) in traditional electronic devices to achieve insulation between the outer peripheral portion of the battery and the inner side of the battery compartment, the present application can reduce the volume occupied by the insulating layer. Thus, when the internal space dimensions (for example, length, width and depth) of the battery compartment are the same, a larger installation space can be provided for the battery cells, so that larger cells can be used or a larger number of cells can be integrated to increase the battery capacity, solving the problem that electronic devices cannot meet the standby requirements of electronic devices when achieving lightweight requirements.

[0014] In some embodiments, the insulating layer also includes a second insulating portion, which is located between the bottom surface of at least a portion of the outer peripheral portion and the bottom surface of the corresponding battery compartment, and the second insulating portion is formed by coating insulating paint on the bottom surface of at least a portion of the outer peripheral portion or the bottom surface of the battery compartment.

[0015] With the above technical solution, since the second insulating portion is formed by coating an insulating varnish on the bottom surface of at least a portion of the outer peripheral portion or the bottom surface of the battery compartment, the outer peripheral portion of the battery can be insulated from the bottom surface of the battery compartment while the second insulating portion can be made thinner. For example, the thickness of the second insulating portion can be between 20 μm and 30 μm. Compared with the solution in which the entire outer peripheral portion of the battery is coated with an insulating film (for example, a PI film, or a PI film and an easy-to-tear wrapping film, the thickness of the insulating film is at least 50 μm) in traditional electronic devices to achieve insulation between the outer peripheral portion of the battery and the bottom surface of the battery compartment, the present application can further reduce the volume occupied by the insulating layer. Therefore, when the internal space dimensions of the battery compartment (for example, length, width and depth) are the same, it is possible to further provide a larger installation space for the battery cells, thereby enabling the use of larger volume cells or the integration of a larger number of cells to increase the battery capacity.

[0016] In some embodiments, in the insulating layer formed on the battery compartment, the second insulating portion further extends to a lower edge of the first insulating portion;

[0017] Alternatively, in the insulating layer formed on the outer peripheral edge portion of the battery, the second insulating portion further extends to a lower edge of the first insulating portion.

[0018] By adopting the above technical solution, the second insulating part of the insulating layer also extends to the lower edge of the first insulating part, which can further enhance the insulation effect between the outer peripheral part of the battery and the battery compartment. In particular, it can prevent the position where the outer side surface of the outer peripheral part of the battery meets the bottom surface from colliding and directly electrically contacting the position where the inner side surface of the battery compartment meets the bottom surface when the electronic device is in a falling state.

[0019] In some embodiments, the area of ​​the bottom surface of the battery compartment where the second insulating portion is formed is configured as a rough surface;

[0020] Alternatively, the area on the bottom surface of the battery compartment where the second insulating portion is formed has an inwardly recessed groove, and the second insulating portion is entirely located in the groove.

[0021] By adopting the above technical solution, the area where the second insulating portion is formed on the bottom surface of the battery compartment is set to a rough surface, which can improve the bonding between the second insulating portion of the insulating layer and the bottom surface of the battery compartment.

[0022] Furthermore, the area of ​​the bottom surface of the battery compartment where the second insulating portion is formed has an inwardly recessed groove, and the second insulating portion is entirely located within the groove. This further reduces the volume occupied by the second insulating portion of the insulating layer, thereby providing more space for the battery cells to be installed while maintaining the same internal dimensions (e.g., length, width, and depth) of the battery compartment. This allows for the use of larger cells or the integration of a greater number of cells, thereby increasing the battery capacity.

[0023] In some embodiments, the bottom surface of the groove is also connected to the inner side surface of the battery compartment.

[0024] In some embodiments, the thickness of the first insulating portion is 20 μm to 30 μm, and the thickness of the second insulating portion is 20 μm to 30 μm.

[0025] In some embodiments, in a depth direction of the battery compartment, an upper edge of the first insulating portion extends to an edge of an opening of the battery compartment.

[0026] In some embodiments, the area of ​​the inner side surface of the battery compartment where the first insulating portion is formed is configured as a rough surface, which can improve the bonding between the first insulating portion of the insulating layer and the inner side surface of the battery compartment.

[0027] In some embodiments, the rough surface is formed by a laser engraving process.

[0028] In some embodiments, an insulating layer is provided between the entire circumference of the outer peripheral portion of the battery and the corresponding battery compartment to form an annular insulating structure arranged around the outer peripheral portion of the battery.

[0029] In some embodiments, the battery comprises:

[0030] The battery body comprises a first outer edge portion, a second outer edge portion, a third outer edge portion, and a fourth outer edge portion connected end to end, the first outer edge portion and the third outer edge portion being disposed opposite each other in a first direction, the second outer edge portion and the fourth outer edge portion being disposed opposite each other in a second direction, and the second outer edge portion being configured as a power connection portion of the battery body; wherein the first direction and the second direction are perpendicular to each other and are respectively perpendicular to a thickness direction of the battery;

[0031] a protective plate assembly, the protective plate assembly being disposed at the second outer edge portion and forming an outer peripheral edge portion of the battery together with the first outer edge portion, the second outer edge portion, the third outer edge portion, and the fourth outer edge portion;

[0032] Among them, the outer side surface of the first outer edge portion and the outer side surface of the third outer edge portion both constitute part of the outer side surface of the battery, the bottom surface of the first outer edge portion and the bottom surface of the third outer edge portion both constitute part of the bottom surface of the battery, and the first outer edge portion and the second outer edge portion of the battery respectively have an insulating layer between the corresponding parts of the battery compartment.

[0033] In some embodiments, the battery body includes a battery shell and a battery cell, wherein the battery shell encapsulates an electrolyte, and the battery cell is located in the battery shell and immersed in the electrolyte;

[0034] The protection board assembly is installed on the battery shell and is electrically connected to the power terminal of the battery cell;

[0035] Furthermore, the outer side surface and the bottom surface of the first outer edge portion and the outer side surface and the bottom surface of the third outer edge portion are formed by the outer surface of the battery case.

[0036] In some embodiments, an insulating layer formed on the battery compartment is also provided between the second outer edge portion of the battery and the corresponding portion of the battery compartment, and all insulating layers located on the battery compartment are connected in sequence to form a U-shaped insulating structure.

[0037] In some embodiments, the width of the second insulating portion between the first outer edge portion of the battery and the battery compartment is 5mm to 15mm, the width of the second insulating portion between the second outer edge portion and the battery compartment is 40mm to 60mm, and the width of the second insulating portion between the third outer edge portion and the battery compartment is 5mm to 15mm.

[0038] In some embodiments, the insulating varnish is made of unsaturated resin or epoxy resin.

[0039] In some embodiments, the bottom surface of the battery except the peripheral portion is fixed to the bottom surface of the corresponding battery compartment through an adhesive portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a schematic diagram showing the electrochemical reaction between the aluminum-plastic film of a soft-pack lithium battery and the middle frame of an electronic device in some solutions;

[0041] FIG2 is a schematic diagram of a partial structure of an electronic device of some solutions;

[0042] FIG3a is a schematic diagram of the three-dimensional structure of a soft-pack lithium battery provided with a PI film in some solutions;

[0043] FIG3 b is a schematic cross-sectional view taken along the AA direction of FIG2 ;

[0044] FIG3 c is a schematic cross-sectional view taken along the BB direction of FIG2 ;

[0045] FIG4a is a schematic diagram of the three-dimensional structure of a soft-pack lithium battery provided with a wrapping film and a PI film in some solutions;

[0046] FIG4 b is a schematic diagram of the explosion structure of a soft-pack lithium battery provided with a wrapping film and a PI film in some solutions;

[0047] FIG4c is a schematic diagram of the partial structure of one side portion of FIG4a;

[0048] FIG4d is a schematic diagram of the partial structure of the other side portion of FIG4a;

[0049] FIG5 a is a schematic structural diagram of a foldable electronic device in an unfolded state provided by an embodiment of the present application;

[0050] FIG5 b is a schematic structural diagram of the foldable electronic device shown in FIG5 a in a folded state;

[0051] FIG5c is a schematic diagram of the exploded structure of the foldable electronic device shown in FIG5a;

[0052] FIG6 a is a schematic diagram of a partial structure of an electronic device in an embodiment of the present application;

[0053] FIG6a-1 is a schematic diagram of the AA cross-sectional structure of FIG6a;

[0054] Figure 6a-2 is a schematic diagram of the BB cross-sectional structure of Figure 6a;

[0055] FIG7 a is a schematic structural diagram of a battery in an electronic device according to an embodiment of the present application from one perspective;

[0056] FIG7 b is a schematic structural diagram of a battery in an electronic device from another perspective in an embodiment of the present application;

[0057] FIG8a is a structural diagram of a battery body and a protection plate assembly according to an embodiment of the present application from one perspective;

[0058] FIG8 b is a structural schematic diagram of the battery body and the protection plate assembly provided in an embodiment of the present application from another perspective;

[0059] FIG9a is a schematic diagram of a configuration of an insulating layer in an embodiment of the present application;

[0060] FIG9 b is a schematic diagram of another configuration of the insulating layer in an embodiment of the present application;

[0061] FIG10 a is a schematic diagram of a partial structure of a housing of an electronic device provided in an embodiment of the present application;

[0062] FIG10 b is a schematic diagram of the AA section of FIG10 a ;

[0063] FIG11 is a diagram illustrating the dimensions of the second insulating portion in an embodiment of the present application;

[0064] FIG12a is a schematic diagram of the assembly structure of a non-foldable electronic device provided in an embodiment of the present application;

[0065] FIG12 b is a schematic diagram of the exploded structure of a non-foldable electronic device provided in an embodiment of the present application.

[0066] Explanation of the reference numerals of some schemes: 10', electronic device; 10A', soft-pack lithium battery; 10B', battery cell; 101A', electrolyte; 102A', aluminum-plastic film; 1021A', surface layer; 1022A', middle layer; 1023A', inner layer; 1031A', positive electrode; 1032A', negative electrode; 11A', middle frame; 12A', insulating film; 121A', PI film; 122A', wrapping film.

[0067] DESCRIPTION OF THE FIGURES IN THE PRESENT APPLICATION: 1. Electronic device; 100. Housing assembly; 10. Housing; 10a. First housing; 10b. Second housing; 10c. Hinge mechanism; 11. Battery compartment; 110. Groove; 111. Inner side; 112. Bottom; 12. Folding screen; 12A. Display; 121. First screen portion; 122. Second screen portion; 123. Foldable portion; 13. Back cover; 20. Battery; 21. Outer peripheral portion; 210A. Outer side; 210B. Bottom; 211. First outer edge portion; 212. Second outer edge portion; 213. Third outer edge portion; 214. Fourth outer edge portion; A. First direction; B. Second direction; 201. Battery body; 2012. Positive electrode tab; 2013. Negative electrode tab; 202. Protection plate assembly; 2021. Protection plate bracket; 2022. Printed circuit board; 2023. Flexible circuit board; 2024. Power terminal; 23. Battery shell; 230. Mounting portion; 30. Insulating layer; 31. First insulating portion; 32. Second insulating portion; 30A. First insulating layer; 30B. Second insulating layer; 30C. Third insulating layer; 40. Mainboard; 50. Camera module; 60. Adhesive portion; 710. First insulating film; 720. Second insulating film; 730. Third insulating film. DETAILED DESCRIPTION

[0068] A battery is a device that contains an electrolyte solution and metal electrodes to generate an electric current. It is a cup, tank, or other container, or part of a composite container, that converts chemical energy into electrical energy. Batteries generally include dry cells, lead-acid batteries, and lithium batteries.

[0069] For small, disposable electronic devices, lithium batteries are often used due to their excellent energy storage performance, particularly soft-pack lithium batteries. In the event of a safety hazard, soft-pack lithium batteries will only bulge and crack, thus ensuring the safety of small electronic devices. Soft-pack lithium batteries are lithium batteries encapsulated with aluminum-plastic film.

[0070] The soft-pack lithium battery will be introduced below with reference to the accompanying drawings.

[0071] Please refer to Figure 1, which is a schematic diagram of the electrochemical reaction between the aluminum-plastic film of a soft-pack lithium battery and the middle frame of an electronic device in some solutions.

[0072] As shown in FIG1 , a soft-pack lithium battery 10A′ contains an electrolyte 101A′, and the outside of the soft-pack lithium battery is covered with an aluminum-plastic film 102A′. The aluminum-plastic film 102A′ generally includes a surface layer 1021A′, an intermediate layer 1022A′, and an inner layer 1023A′. The surface layer 1021A′, the intermediate layer 1022A′, and the inner layer 1023A′ are bonded together by an adhesive to form a film. Among them, the surface layer 1021A' is usually a nylon adhesive layer, which prevents the penetration of air, especially oxygen; the middle layer 1022A' generally uses aluminum foil or copper foil as the base material, which plays a role in waterproofing, barrier and product molding; the inner layer 1023A' is a resin layer, which can be polypropylene, and its main function is sealing and bonding, and it serves to separate the middle layer 1022A' (for example, aluminum foil layer or copper foil layer) from the battery cell to prevent the leakage of the packaged electrolyte and corrosion of the middle layer 1022A', and the inner layer 1023A' is in contact with the electrolyte 101A'.

[0073] The soft-pack lithium battery 10A' may also include a battery cell 10B' with external tabs. Tabs refer to metal conductor strips that lead out the positive electrode 1031A' and the negative electrode 1032A' in the battery cell. The metal conductor strips extend outward from the battery cell 10B' to form contact points during charging and discharging.

[0074] After the soft-pack lithium battery 10A' is installed in the battery compartment of the middle frame 11A' of the electronic device, when the soft-pack lithium battery 10A' is in direct contact with the battery compartment of the middle frame 11A', when an electron path and an ion path are formed and the voltage is greater than 0.5V, electrical corrosion will be caused to the aluminum-plastic film 102A'.

[0075] The electronic path refers to an electrical circuit formed between the negative electrode 1032A' of the soft-pack lithium battery 10A' and the battery compartment of the middle frame 11A' of the electronic device.

[0076] The ion passage refers to the phenomenon that the inner layer 1023A' is torn and damaged, and the electrolyte 101A' and the middle layer 1022A' come into contact.

[0077] The voltage greater than 0.5V means that the operating voltage of the soft-pack lithium battery 10A' is greater than 0.5V.

[0078] That is, after the soft-pack lithium battery 10A' is installed in the battery compartment of the middle frame 11A' of the electronic device, when the negative electrode 1032A' of the soft-pack lithium battery 10A' forms an electrical circuit with the middle frame 11A' of the electronic device, the electrolyte 101A' contacts the intermediate layer 1022A', and the operating voltage of the soft-pack lithium battery 10A' is greater than 0.5V, it will cause electrical corrosion to the intermediate layer 1022A' (aluminum-plastic film).

[0079] To address this issue, in order to avoid electrical corrosion of the aluminum-plastic film, this can be achieved by preventing the negative electrode 1032A' of the soft-pack lithium battery 10A' from forming an electrical circuit with the middle frame 11A' of the electronic device, or preventing the electrolyte 101A' from contacting the intermediate layer 1022A', or preventing the operating voltage of the soft-pack lithium battery 10A' from being greater than 0.5V.

[0080] However, in actual applications, the operating voltage of soft-pack lithium batteries 10A' is generally above 2V, making it difficult to control the operating voltage of soft-pack lithium batteries 10A' below 0.5V. Similarly, during the processing of inner layer 1023A', tearing and damage are difficult to avoid, and the folding process can easily cause damage to inner layer 1023A'. The possibility of contact between electrolyte 101A' and intermediate layer 1022A' is very high. Therefore, ion conductive pathways are common in soft-pack lithium batteries 10A'. As shown in Figure 1, when aluminum foil is used as intermediate layer 1022A', Li+ ions in electrolyte 101A' react with the aluminum foil to form LixAl.

[0081] Based on the above problems, please refer to FIG2 , which is a schematic diagram of a partial structure of an electronic device of some solutions.

[0082] As shown in Figure 2, electronic device 10' includes a soft-pack lithium battery 10A' and a midframe 11A'. To prevent direct contact between the outer casing (e.g., an aluminum-plastic film) of soft-pack lithium battery 10A' and the battery compartment, which could result in electrochemical reactions and electrical corrosion, an insulating film 12A' is typically applied around the entire periphery of the battery to electrically insulate the outer periphery of soft-pack lithium battery 10A' from the corresponding battery compartment.

[0083] Please refer to Figures 3a-3c. Figure 3a is a schematic diagram of the three-dimensional structure of a soft-pack lithium battery with a PI film in some embodiments. Figure 3b is a schematic cross-sectional view along the AA direction of Figure 2. Figure 3c is a schematic cross-sectional view along the BB direction of Figure 2.

[0084] In some embodiments, as shown in Figures 3a to 3c, the four outer edges of the soft-pack lithium battery 10A' are wrapped with a PI film 121A' (the PI film can cover the side, bottom, and top surfaces of the corresponding outer edges). The bottom surface of the soft-pack lithium battery 10A' other than the outer edges is bonded to the bottom surface of the battery compartment via an adhesive (e.g., adhesive backing). In other words, the PI film 121A' is wrapped around the outer surface of the aluminum-plastic film 102A' of the soft-pack lithium battery 10A'.

[0085] PI film refers to polyimide film (Polyimide Film), which is a thin film insulating material. It is made by polycondensing pyromellitic dianhydride (PMDA) and diaminodiphenyl ether (ODA) in a strong polar solvent and casting it into a film and then imidizing it. It is mainly used for insulation here.

[0086] For this solution, since an independent PI film 121A' is attached to the outer edge of the soft-pack lithium battery 10A', and the thickness of the PI film 121A' is at least 50 μm, it will occupy more space in the soft-pack lithium battery 10A'. When the soft-pack lithium battery 10A' is installed on the electronic device 10', when the volume of the battery compartment in the electronic device 10' remains unchanged, that is, when the internal space of the battery compartment (that is, the battery installation space) is constant, the volume occupied by the soft-pack lithium battery 10A' cell will be smaller or the number of integrated cells will be smaller, resulting in a smaller capacity of the soft-pack lithium battery 10A'.

[0087] Please refer to Figures 4a-4d. Figure 4a is a schematic diagram of the three-dimensional structure of a soft-pack lithium battery with a wrapping film and a PI film in some embodiments. Figure 4b is a schematic diagram of the exploded structure of a soft-pack lithium battery with a wrapping film and a PI film in some embodiments. Figure 4c is a schematic diagram of the partial structure of one side of Figure 4a. Figure 4d is a schematic diagram of the partial structure of the other side of Figure 4a.

[0088] As shown in Figures 4a to 4d, in this soft-pack lithium battery 10A', two opposing outer edges of the soft-pack lithium battery 10A' are wrapped with a PI film 121A', and the other two opposing outer edges are wrapped with a wrapping film 122A' (easy-tear sticker). The wrapping film 122A' wraps the side surfaces, bottom surface, and part of the top surface of the corresponding outer edges. The wrapping film 122A' covers the entire bottom surface of the soft-pack lithium battery 10A' and is bonded to the bottom surface of the battery compartment via adhesive. In other words, the PI film 121A' and the wrapping film 122A' wrap the outer surface of the aluminum-plastic film 102A' of the soft-pack lithium battery 10A'.

[0089] For this solution, since the thickness of the PI film 121A' and the wrapping film 122A' are both at least 50μm, this will occupy more space in the soft-pack lithium battery 10A'. When the soft-pack lithium battery 10A' is installed on the electronic device 10', when the volume of the battery compartment in the electronic device 10' remains unchanged, that is, when the internal space of the battery compartment (that is, the battery installation space) is constant, the volume occupied by the soft-pack lithium battery 10A' cell will be smaller or the number of integrated cells will be smaller, resulting in a smaller capacity of the soft-pack lithium battery 10A'.

[0090] In the above two solutions, when the soft-pack lithium battery 10A' is installed in the battery compartment of the electronic device 10', to prevent direct contact between the outer shell of the soft-pack lithium battery 10A' (e.g., the outer shell formed by the aluminum-plastic film 102A') and the battery compartment (made of a conductive material, such as metal), resulting in an electrochemical reaction and thus electrical corrosion, either the entire outer periphery of the soft-pack lithium battery 10A' is covered with a PI film, or two opposing outer edges of the battery are wrapped with a PI film 121A', and the other two opposing outer edges are wrapped with a wrapping film 122A' (easy-tear sticker). Given a certain internal space in the battery compartment (i.e., the battery installation space), the PI film or the wrapping film (the thickness of the PI film or the wrapping film is at least 50 μm) will occupy a significant amount of the battery volume, limiting the volume of the battery cells. Consequently, when the battery is installed in the battery compartment of the electronic device, the volume of the battery cells used is limited, resulting in a lower capacity.

[0091] Based on this, an embodiment of the present application provides an electronic device, which electrically isolates the battery and the battery compartment by setting an insulating layer between the outer peripheral edge of the battery and the inner wall surface of the corresponding battery compartment, and the first insulating part of the insulating layer is formed by coating an insulating paint on the outer side surface of at least part of the outer peripheral edge area or the inner side surface of the battery compartment. In this way, the outer peripheral edge of the battery and the inner side surface of the battery compartment can be insulated while the first insulating part can be made thinner. For example, the thickness of the first insulating part can be between 20μm and 30μm. Compared with the solution in which the entire outer peripheral edge of the battery is covered with an insulating film (for example, PI film, or PI film and an easy-to-tear wrapping film, the thickness of the insulating film is at least 50μm) in traditional electronic devices to achieve insulation between the outer peripheral edge of the battery and the inner side surface of the battery compartment, the present application can reduce the volume occupied by the insulating layer. Thus, when the internal space dimensions (for example, length, width and depth) of the battery compartment remain the same, a larger installation space can be provided for the battery cells, thereby enabling the use of larger cells or the integration of more cells, thereby increasing the battery capacity and solving the problem that electronic devices cannot meet the standby requirements of electronic devices while achieving the requirements of lightweight and thinness.

[0092] The specific structure of the electronic device of the present application is described in detail below with reference to the accompanying drawings.

[0093] First, it should be noted that the electronic devices of the embodiments of the present application may include, but are not limited to, mobile phones, tablet personal computers, wearable devices, netbooks, POS (Point of Sales) machines, personal digital assistants (PDAs), virtual reality (VR) devices, augmented reality (AR) devices, laptop computers, notebook computers, personal computers, and other portable electronic devices.

[0094] Referring to Figures 5a to 5c, the electronic device is a foldable electronic device. Figure 5a is a schematic diagram of the structure of the foldable electronic device provided in an embodiment of the present application when in an unfolded state. Figure 5b is a schematic diagram of the structure of the foldable electronic device shown in Figure 5a when in a folded state. Figure 5c is a schematic diagram of the exploded structure of the foldable electronic device shown in Figure 5a.

[0095] As shown in Figures 5a and 5b, a foldable electronic device 1 can have different usage states in different usage scenarios. Figure 5a shows the electronic device 1 in an unfolded state, with an unfolded angle of, for example, 180°, enabling a large screen display. Figure 5b shows the electronic device 1 in a folded state, where it is compact and easy to carry.

[0096] It should be noted that the angles illustrated in this embodiment are all allowed to have slight deviations. For example, the unfolded angle of the electronic device 1 shown in FIG5a is 180°, which means that the unfolded angle can be 180° or approximately 180°, such as 170°, 175°, 185°, or 190°. The angles illustrated in the following examples should be understood in the same way.

[0097] In addition, the electronic device 1 shown in Figures 5a and 5b is an electronic device that can be folded once. The electronic device includes two parts that can rotate relative to each other. When the two parts rotate to be coplanar, the electronic device 1 is in an unfolded state (as shown in Figure 5a). When the two parts rotate to overlap each other, the electronic device 1 is in a folded state (as shown in Figure 5b). In other embodiments, the electronic device 1 can also be a mobile phone that can be folded multiple times (more than twice). In this case, the electronic device 1 can include multiple parts that are connected by sequential rotation. Two adjacent parts can be relatively separated to unfold to the unfolded state, and the two adjacent parts can also be relatively close to fold to the folded state.

[0098] As shown in Figure 5c, the electronic device 1 includes a shell assembly 100 and a folding screen 12. The folding screen 12 is supported and connected to one side surface of the shell assembly 100. The side surface of the folding screen 12 facing away from the shell assembly 100 is its display surface (not shown in the figure). The display surface is used to display information and provide an interactive interface for the user. In this embodiment, the display surface of the folding screen 12 is defined as its front side, and the other side surface of the folding screen 12 opposite to the front side is defined as its back side. That is, the front side of the folding screen 12 is exposed outside the shell assembly 100, and the back side of the folding screen 12 faces the shell assembly 100 and is connected to the shell assembly 100. Accordingly, the side surface of the shell assembly 100 facing the folding screen 12 is defined as the front side of the shell assembly 100, and the side surface of the shell assembly 100 facing away from the folding screen 12 is defined as the back side of the shell assembly 100.

[0099] In this embodiment, the folding screen 12 can be, but is not limited to, an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode (MID) display, a micro organic light-emitting diode (MID) display, a micro organic light-emitting diode (MID) display, or a quantum dot light-emitting diode (QLED) display, etc.

[0100] The foldable screen 12 may include a first screen portion 121, a second screen portion 122, and a foldable portion 123, with the foldable portion 123 located between the first screen portion 121 and the second screen portion 122. During use of the electronic device 1, the first screen portion 121 and the second screen portion 122 remain flat, while the foldable portion 123 can bend to change the angle between the first screen portion 121 and the second screen portion 122, allowing the foldable screen 12 to fold or unfold with the movement of the housing assembly 100, thereby enabling the electronic device 1 to switch between a folded state and an unfolded state.

[0101] For example, in the foldable screen 12, at least the foldable portion 123 is made of a flexible material so that the foldable portion 123 is bendable. The first screen portion 121 and the second screen portion 122 can be made of a flexible material, a rigid material, or partially rigid and partially flexible, which is not limited in this embodiment.

[0102] Driven by the shell assembly 100, the folding screen 12 can switch between the unfolded state and the folded state. As shown in Figures 5a and 5c, when the folding screen 12 is in the unfolded state, the first screen portion 121 and the second screen portion 122 are in a relatively distant unfolded state, the foldable portion 123 is in a flattened state without bending, and the first screen portion 121, the second screen portion 122 and the foldable portion 123 are oriented in the same direction and are in a coplanar state. At this time, the angle between the first screen portion 121 and the second screen portion 122 is 180°. The folding screen 12 can achieve a large-screen display, which can provide users with richer information and bring users a better user experience.

[0103] As shown in FIG5b , when the foldable screen 12 is in the folded state, the first screen portion 121 and the second screen portion 122 are stacked relative to each other, and the foldable portion 123 is bent, with the bending angle of the foldable portion 123 being, for example, 180°. In this state, the electronic device 1 is compact and easy to carry and store.

[0104] It should be noted that the electronic device 1 shown in the figure is an outward-folding electronic device. When in the folded state, the first screen portion 121 and the second screen portion 122 of the folding screen 12 face each other, and the housing assembly 100 is located between the first screen portion 121 and the second screen portion 122. The folding screen 12 is enclosed outside the housing assembly 100 and is visible to the user. When an outward-folding electronic device is in the folded state, the folding screen 12 is exposed and can be used to perform display functions. Therefore, there is no need to add an additional display screen on the back of the housing assembly 100 to realize the display function of the electronic device 1 in the folded state.

[0105] In other examples, the electronic device 1 may also be an inward-folding electronic device. When in the folded state, the first screen portion 121 and the second screen portion 122 of the folding screen 12 are relatively close together, the foldable portion 123 can be bent, and the housing assembly 100 protects the folding screen 12 from being scratched by hard objects. If the inward-folding electronic device needs to provide a display function in the folded state, a display screen can be added to the back of the housing. When the electronic device 1 is in the folded state, this display screen provides the display function.

[0106] In addition, in some embodiments, the electronic device 1, particularly an inward-folding electronic device, can hover at an angle between the unfolded and folded states. For example, the hovering angle of the electronic device 1 can be 120°, 130°, 140°, or 150°. The housing assembly 100 can be relied upon to provide a damping force, allowing the housing assembly 100 to hover in a semi-expanded state between the folded and unfolded states, with the foldable screen 12 remaining in the semi-expanded state along with the housing assembly 100. At this point, the foldable portion 123 of the foldable screen 12 is also bent, and the degree of bending of the foldable portion 123 is less than that in the folded state. The first screen portion 121 and the second screen portion 122 of the foldable screen 12 are relatively tilted, with the angle between the first screen portion 121 and the second screen portion 122 being, for example, 120°, 130°, 140°, or 150°.

[0107] The housing assembly 100 is used to support and secure the foldable screen 12 and to switch the foldable screen 12 between the folded and unfolded states. Referring to Figure 5c , the housing assembly 100 includes a first housing 10a, a second housing 10b, and a hinge mechanism 10c. The hinge mechanism 10c is connected between the first and second housings 10a, 10b. The hinge mechanism 10c rotatably connects the first and second housings 10a, 10b, thereby enabling relative rotation between the first and second housings 10a, 10b.

[0108] The first housing 10a supports and fixes the first screen portion 121 of the foldable screen 12, and the second housing 10b supports and fixes the second screen portion 122 of the foldable screen 12. In other words, the first screen portion 121 of the foldable screen 12 is fixedly connected to the first housing 10a, and the second screen portion 122 of the foldable screen 12 is fixedly connected to the second housing 10b. The foldable portion 123 of the foldable screen 12 is arranged corresponding to the hinge mechanism 10c. When the hinge mechanism 10c drives the first housing 10a and the second housing 10b to rotate relative to each other, the first screen portion 121 and the second screen portion 122 of the foldable screen 12 change their orientation accordingly, and the foldable portion 123 of the foldable screen 12 bends or flattens as the orientation of the first screen portion 121 and the second screen portion 122 changes.

[0109] The hinge mechanism 10c drives the first housing 10a and the second housing 10b to rotate relative to each other, allowing the electronic device 1 to switch between a folded state and an unfolded state. The first housing 10a and the second housing 10b can rotate away from each other until they are coplanar. At this point, the housing assembly 100 is in the unfolded state, and the foldable screen 12 is in the unfolded state as the housing assembly 100 unfolds, as shown in FIG5a. The first housing 10a and the second housing 10b can also rotate toward each other until they are relatively stacked. At this point, the housing assembly 100 is in the folded state, and the foldable screen 12 is in the folded state as the housing assembly 100 folds, as shown in FIG5b.

[0110] For example, the first housing 10a may have a support surface facing the first screen portion 121 of the foldable screen 12, and the first screen portion 121 of the foldable screen 12 is attached to the support surface of the first housing 10a. For example, the first screen portion 121 of the foldable screen 12 is adhered to the support surface of the first housing 10a. Similarly, the second housing 10b may have a support surface facing the second screen portion 122 of the foldable screen 12, and the second screen portion 122 of the foldable screen 12 is attached to the support surface of the second housing 10b. For example, the second screen portion 122 of the foldable screen 12 is adhered to the support surface of the second housing 10b.

[0111] In addition, both the first shell 10a and the second shell 10b may have a storage space, and the storage space is used to install some functional components of the electronic device 1 (not shown in the figure), for example, the storage space is used to install some components such as circuit boards, batteries, camera modules, microphones, speakers, etc. Exemplarily, circuit boards may be provided in both the first shell 10a and the second shell 10b, and electrical connection between the components in the two shells is achieved through the circuit boards in the two shells; the battery for powering the components may be provided only in the first shell 10a or the second shell 10b, or batteries may be provided in both the first shell 10a and the second shell 10b; as for other components such as camera modules, microphones, speakers, etc., they may be concentrated in the first shell 10a or the second shell 10b, or some components may be provided in the first shell 10a and some components may be provided in the second shell 10b.

[0112] The first shell 10a and the second shell 10b may both include a middle frame (not shown in the figure) and a back cover (not shown in the figure). The middle frame is connected between the folding screen 12 and the back cover. The side surface of the middle frame facing the folding screen 12 forms the above-mentioned support surface. The folding screen 12 can be mounted on the side surface of the middle frame. The back cover is connected to the side of the middle frame away from the folding screen 12. The middle frame and the back cover together enclose a storage space for installing devices. A battery compartment is provided in the storage space, and the battery is installed in the battery compartment.

[0113] It should be understood that the battery can be installed in the battery compartment within the accommodating space of the first shell 10a, or it can be installed in the battery compartment within the accommodating space of the second shell 10b. The specific selection can be made according to the actual design, and this embodiment of the application does not make the only requirement.

[0114] The electronic device may also include a power management module (not shown), which is electrically connected between the battery and the electrical device. The power management module is used to receive input from the battery and discharge the electrical device to provide power to the electrical device. The power management module can also be used to monitor parameters such as battery capacity, number of charge and discharge cycles, and health status (leakage, impedance).

[0115] The electronic device also includes a charging management module (not shown in the figure), which is electrically connected between the charger and the battery. The charging management module is used to receive charging input from the charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module can receive charging input from the wired charger through a universal serial bus (USB) interface. In some wireless charging embodiments, the charging management module can receive wireless charging input through the wireless charging coil of the electronic device. The power management module and the charging management module can be integrated into one or set separately, which is not specifically limited here.

[0116] The following is a detailed description of the matching structure between one of the first shell 10a and the second shell 10b and the battery. Of course, those skilled in the art will understand that the other shell and the battery installed therein may also adopt the matching structure described below.

[0117] Please refer to Figures 6a, 6a-1, and 6a-2. Figure 6a is a schematic diagram of a partial structure of the electronic device 1 in the embodiment of the present application. Figure 6a-1 is a schematic diagram of the AA cross-section structure of Figure 6a. Figure 6a-2 is a schematic diagram of the BB cross-section structure of Figure 6a.

[0118] As shown in Figures 6a to 6a-2, the electronic device 1 includes a housing 10 (the housing 10 is a first housing 10a or a second housing 10b) and a battery 20. The housing 10 is provided with a battery compartment 11, and the battery 20 is installed in the battery compartment 11. The bottom surface 210B of the battery 20 (as shown in Figure 8a) faces the bottom surface 112 of the battery compartment 11, and the outer side surface 210A of the battery (as shown in Figure 8a) faces the inner side surface 111 of the battery compartment 11. The battery 20 has an outer peripheral edge portion 21, the outer side surface of the outer peripheral edge portion 21 constitutes the outer side surface 210A of the battery 20, and the bottom surface of the outer peripheral edge portion 21 constitutes a portion of the bottom surface 210B of the battery.

[0119] It should be noted that the structure and specific formation of the battery compartment 30 are not limited. In one example, the housing 10 includes a middle frame, a portion of the bottom plate of the middle frame constitutes the bottom wall of the battery compartment, and the side walls of the battery compartment protrude from the surface of the bottom plate of the middle frame facing the rear cover. Part of the side walls of the battery compartment may be formed by the outer frame of the middle frame. It will be understood by those skilled in the art that the battery compartment may also be a groove on the surface of the bottom plate of the middle frame facing the rear cover, and this application is not limited to this.

[0120] As shown in FIG. 6 a to FIG. 6 a - 2 , an insulating layer 30 is provided between at least a portion of the circumference of the outer peripheral portion 21 of the battery 20 and the corresponding battery compartment 11 to electrically isolate the battery 20 from the battery compartment 11 .

[0121] The insulating layer 30 may include a first insulating portion 31, which is located between the outer side surface 210A of at least a portion of the outer peripheral portion 21 and the corresponding inner side surface 111 of the battery compartment 11. In one embodiment, the first insulating portion 31 is formed by applying an insulating varnish to the inner side surface 111 of the battery compartment 11. In other alternative embodiments, the first insulating portion 31 may also be formed by applying an insulating varnish to the outer side surface of the outer peripheral portion 21 of the battery 20, which is not limited in this application.

[0122] In the present application, an insulating layer 30 is disposed between at least a portion of the circumference of the outer peripheral portion 21 of the battery 20 and the corresponding battery compartment 11. The first insulating portion 31 of the insulating layer 30 is formed by applying an insulating varnish to the outer side surface of at least a portion of the outer peripheral portion 21 of the battery 20 or the inner side surface 111 of the battery compartment. This allows insulation between the outer peripheral portion 21 of the battery and the inner side surface 111 of the battery compartment to be achieved while making the first insulating portion 31 thinner. For example, the thickness of the first insulating portion 31 can be between 20 μm and 30 μm. Or it can be understood that compared to the solution in which the entire outer periphery of the battery is coated with an insulating film (for example, a PI film, or a PI film and an easy-to-tear wrapping film, the thickness of the insulating film is at least 50 μm) in traditional electronic devices to achieve insulation between the outer periphery 21 of the battery 20 and the inner side 111 of the battery compartment 11, the insulating layer formed by coating an insulating varnish in the present application replaces the insulating film coated in the outer periphery of the battery in the traditional technology, which can reduce the volume occupied by the insulating layer 30. Therefore, when the internal space dimensions (for example, length, width and depth) of the battery compartment 11 are the same, a larger installation space can be provided for the battery cells of the battery 20, so that larger battery cells can be used or a larger number of battery cells can be integrated, thereby increasing the capacity of the battery 20 and solving the problem that electronic devices cannot meet the standby requirements of electronic devices when achieving the requirements of lightness and thinness.

[0123] The specific structure and shape of the battery 20 in this application are not limited. In some examples, it can be set as a regular cubic structure or an irregular cubic structure, which is not limited in this application.

[0124] In one embodiment, please refer to Figures 7a to 8b. Figure 7a is a structural schematic diagram of a battery in an electronic device from one perspective in an embodiment of the present application. Figure 7b is a structural schematic diagram of a battery in an electronic device from another perspective in an embodiment of the present application. Figure 8a is a structural schematic diagram of a battery body and a protective plate assembly from one perspective provided in an embodiment of the present application. Figure 8b is a structural schematic diagram of a battery body and a protective plate assembly from another perspective provided in an embodiment of the present application.

[0125] The battery 20 may include a battery body 201 and a protective plate assembly 202. The battery body 201 has a first outer edge portion 211, a second outer edge portion 212, a third outer edge portion 213, and a fourth outer edge portion 214, which are connected end to end. The first outer edge portion 211 and the third outer edge portion 213 are arranged opposite each other in a first direction A, and the second outer edge portion 212 and the fourth outer edge portion 214 are arranged opposite each other in a second direction B. The second outer edge portion 212 is configured as the power connection portion of the battery body 201. The first direction A and the second direction B are perpendicular to each other and are respectively perpendicular to the thickness direction of the battery. In one example, the first direction A is parallel to the width direction of the battery 20 and the width direction of the electronic device 1, and the second direction B is parallel to the length direction of the battery 20 and the length direction of the electronic device 1.

[0126] The power connection part of the battery body 201 refers to the part through which the battery body 201 is usually electrically connected to other components (for example, the motherboard of the electronic device 1). The electrodes (including the positive electrode and the negative electrode) of the battery body 201 are arranged on the power connection part of the battery body 201. The battery body 201 realizes current transmission between other components through its power connection part, thereby realizing the charging and discharging of the battery body 201.

[0127] The protection plate assembly 202 is arranged at the power connection part (i.e., the second outer edge part 212) of the battery body 201, and the battery body 201 is connected to other components (for example, the main board of the electronic device 1) through the protection plate assembly 202. In other words, the protection plate assembly 202 is connected to the electrodes of the battery body 201, and the protection plate assembly 202 is electrically connected to other components. The current is transmitted between the battery body 201 and other components through the protection plate assembly 202. The protection plate assembly 202 plays a protective role during the charging and discharging process of the battery body 201 to prevent problems such as overcharging, over-discharging, and short circuit. The protective plate assembly 202 is arranged on the second outer edge portion 212, and together with the first outer edge portion 211, the second outer edge portion 212, the third outer edge portion 213 and the fourth outer edge portion 214 constitute the outer peripheral edge portion 21 of the battery; the outer side surface of the first outer edge portion 211 and the outer side surface of the third outer edge portion 213 both constitute part of the outer side surface of the battery, and the bottom surface of the first outer edge portion 211 and the bottom surface of the third outer edge portion 213 both constitute part of the bottom surface 210B of the battery.

[0128] The battery body 201 includes a battery shell 23 and a battery cell (not shown in the figure). The battery shell 23 is encapsulated with an electrolyte, and the battery cell is located in the battery shell 23 and immersed in the electrolyte. The protective plate assembly 202 is mounted on the battery shell 23 and is electrically connected to the power terminals of the battery cell (for example, the positive electrode tab 2012 and the negative electrode tab 2013). The outer side surface and bottom surface of the first outer edge portion 211 and the outer side surface and bottom surface of the third outer edge portion 213 are all formed by the outer surface of the battery shell 23. The outer side surface and bottom surface of the first outer edge portion 211 and the outer side surface and bottom surface of the third outer edge portion 213 are all formed by the outer surface of the battery shell 23.

[0129] In one embodiment, the battery case 23 has a mounting portion 230 that forms part of the second outer edge portion 212. The protective plate assembly 202 is mounted on the mounting portion 230. The electrical terminals of the battery cells (e.g., the positive electrode tab 2012 and the negative electrode tab 2013) pass through the mounting portion 230 and extend outside the mounting portion 230, where they are electrically connected to the protective plate assembly 202 via conductive members.

[0130] The battery case 23 refers to the portion of the battery that encapsulates and protects the battery cells. The battery case includes, but is not limited to, aluminum-plastic film. The electrolyte, located within the gaps between the bare battery cells within the battery case, serves as a carrier for lithium ions within the battery. The electrolyte is typically prepared from a high-purity organic solvent, a lithium electrolyte salt, and necessary additives, all formulated under specific conditions and proportions.

[0131] A battery cell includes at least one positive electrode tab 2012 and at least one negative electrode tab 2013. The positive electrode tab 2012 can be connected to the current collector of the positive electrode sheet in the battery cell by welding, or it can be directly extended from the current collector of the positive electrode sheet. Similarly, the negative electrode tab 2013 can be connected to the current collector of the negative electrode sheet in the battery cell by welding, or it can be directly extended from the current collector of the negative electrode sheet. The positive electrode tab 2012 is usually an aluminum strip. The negative electrode tab 2013 is usually a nickel strip. In order to prevent the tab from short-circuiting with the metal layer in the shell (such as the aluminum layer in the aluminum-plastic film), the part of the tab that passes through the shell is usually coated with tab glue to provide insulation and isolation.

[0132] The structure of the battery cell is not limited. In some solutions, the battery cell can be a wound battery cell, a laminated battery cell, etc.

[0133] The wound battery cell is formed by stacking and winding four layers of materials: positive electrode sheet, separator, negative electrode sheet and separator.

[0134] The laminated battery cell includes positive and negative electrode sheets that are alternately stacked together, and a separator is provided between adjacent positive and negative electrode sheets. Both the positive and negative electrode sheets include a current collector and an electrode material coated on the current collector. The current collector of the positive electrode sheet is usually aluminum foil. The current collector of the negative electrode sheet is usually copper foil. The separator is used to separate the positive electrode sheet and the negative electrode sheet to prevent the two electrodes from directly contacting each other and causing a short circuit. The separator can be a separator bag, a separator folded along a Z shape, or a plurality of single-piece separators. The present application does not limit the specific structural form of the separator in the laminated bare battery cell, as long as it can insulate and isolate the positive electrode sheet and the negative electrode sheet. The material of the separator is usually a polyolefin porous film. Compared with the wound battery cell, the laminated battery cell has a stronger fast charging capability and better flexibility in shape and tab position design.

[0135] The structure of the tab is not limited, and it is used to lead the electrode of the battery cell to the outside of the housing. Specifically, the tab used to lead the positive electrode of the battery cell is called the positive tab, and the tab used to lead the negative electrode of the battery cell is called the negative tab.

[0136] The protection board assembly 202 may include a printed circuit board 2022 and a flexible circuit board 2023. The printed circuit board 2022 is mounted on the mounting portion 230 of the battery shell 23 through the protection board bracket 2021. The positive pole tab 2012 and the negative pole tab 2013 of the battery cell are electrically connected to the printed circuit board 2022 through a conductive member (which may be an FPC) to achieve electrical connection between the protection board assembly 202 and the battery cell. Devices (not shown in the figure) are integrated on the printed circuit board 2022. These devices are used to monitor and control the state (charge and discharge state) of the battery cell to prevent the aforementioned problems of overcharging, over-discharging, short circuit, etc. from occurring in the battery cell. One end of the flexible circuit board 2023 is connected to the printed circuit board 2022, and the other end has an electrical terminal 2024 to achieve electrical connection with other components (such as the motherboard of the electronic device 1).

[0137] In some embodiments, to protect the protective plate assembly 202, the exterior of the protective plate assembly 202 may also be wrapped with a first insulating film 710. One side of the first insulating film 710 is connected to the surface of the mounting portion facing the rear cover, while the other side of the first insulating film 710 passes around the top of the protective plate assembly 202, extends toward the battery body 201, and connects to the top surface of the battery body 201. Portions of the flexible circuit board 2023 extend outside the first insulating film 710 to prevent the first insulating film 710 from restricting the deformation and movement of the flexible circuit board 210. It should be noted that the flexible circuit board 2023 can be attached to the outer surface of the first insulating film 710.

[0138] Exemplarily, the first insulating film 710 can be a Mylar film or a PI film. Mylar film has good surface smoothness, transparency, and mechanical flexibility. By wrapping it around the portion where the protective plate assembly 202 is located, the protective plate assembly 202 can be protected, making the protective plate assembly 202 more securely installed. The first insulating film 710 wraps the connected positive electrode tab 2012 and the negative electrode tab 2013 inside it, forming an insulating isolation protection between the connected tabs and the battery compartment 11 to reduce the risk of short circuits in the connected tabs. It should be noted that the second insulating film 720 and the third insulating film 730 mentioned below can also be Mylar film or a PI film.

[0139] Those skilled in the art will appreciate that the exterior of the protection plate assembly 202 may not be wrapped with the first insulating film 710 , and this application does not impose any limitation on this.

[0140] In some embodiments, the outer surface of the mounting portion 230 of the battery case 23 may also be wrapped with a second insulating film 720. The outer surface of the fourth outer edge portion 214 of the battery body 201 may also be wrapped with a third insulating film 730. In other words, the third insulating film 730 may be wrapped around the outer surface of the battery case at the fourth outer edge portion 214. It will be appreciated by those skilled in the art that in other alternative embodiments, the second insulating film 720 and / or the third insulating film 730 may not be provided, and this application is not limited thereto.

[0141] Please refer to Figures 9a and 9b. Figure 9a is a schematic diagram of an arrangement of the insulating layer in an embodiment of the present application. Figure 9b is a schematic diagram of an arrangement of the insulating layer in an embodiment of the present application. Schematic diagram of a partial structure of a housing in an electronic device;

[0142] In combination with Figures 6a, 6a-1, 6a-2, 9a, and 9b, it can be understood that an insulating layer 30 is provided between the outer peripheral edge portion 21 of the battery 20 and the corresponding battery compartment 11 along at least a portion of its circumference. It can be understood that an insulating layer 30 can be provided between a portion of the outer peripheral edge portion 21 of the battery 20 along its circumference (for example, a portion of the outer edge portions of the first outer edge portion 211, the second outer edge portion 212, the third outer edge portion 213, and the fourth outer edge portion 214) and the corresponding battery compartment 11, and an insulating film (for example, the first insulating film 710, the second insulating film 720, and the third insulating film 730 shown in Figures 7a to 7b) can be provided between another portion of the outer peripheral edge portion 21 of the battery 20 along its circumference and the corresponding battery compartment 11; or, an insulating layer 30 can be provided between all regions of the outer peripheral edge portion 21 of the battery 20 along its circumference and the corresponding battery compartment 11, and this application does not impose any restrictions on this.

[0143] The following is an illustration with reference to the accompanying drawings.

[0144] In one achievable embodiment, as shown in Figures 6a-1, 6a-2, and 9a, an insulating layer 30 may be disposed between the first outer edge portion 211 and the third outer edge portion 213 of the battery 20 and the battery compartment 11. Specifically, a first insulating layer 30A is disposed between the first outer edge portion 211 and the battery compartment 11, and a third insulating layer 30C is disposed between the third outer edge portion 213 and the battery compartment 11111. In other words, the outer surfaces of the first outer edge portion 211 and the third outer edge portion 213 of the battery 20 do not need to be wrapped with an insulating film (e.g., Mylar film or PI film).

[0145] In another possible implementation, as shown in Figures 6a-1, 6a-2, and 9b, insulating layers 30 may be disposed between the first outer edge 211, second outer edge 212, and third outer edge 213 of the battery 20 and the battery compartment 11. Specifically, a first insulating layer 30A is disposed between the first outer edge 211 and the battery compartment 11, a second insulating layer 30B is disposed between the second outer edge 212 and the battery compartment 11, and a third insulating layer 30C is disposed between the third outer edge 213 and the battery compartment 11. All insulating layers 30 located on the battery compartment 11 are sequentially connected to form a U-shaped insulating structure. In other words, the outer surfaces of the first outer edge 211, second outer edge 212, and third outer edge 213 of the battery 20 do not need to be wrapped with an insulating film. For example, the outer surface of the second outer edge 212 does not need to be wrapped with the first insulating film 710 or the second insulating film 720.

[0146] In another possible implementation, an insulating layer 30 may be provided between the first outer edge portion 211, the second outer edge portion 212, the third outer edge portion 213, and the fourth outer edge portion 214 of the battery 20 and the battery compartment 11. That is, in addition to the above-described method, the fourth outer edge portion 214 may also be provided with an insulating layer 30. In other words, the outer surfaces of the first outer edge portion 211, the second outer edge portion 212, the third outer edge portion 213, and the fourth outer edge portion 214 of the battery 20 do not need to be wrapped with an insulating film. For example, the outer surface of the second outer edge portion 212 does not need to be wrapped with the first insulating film 710 or the second insulating film 720, and the outer surface of the fourth outer edge portion 214 does not need to be wrapped with the third insulating film 730.

[0147] In the above manner, the insulating layer 30 may be formed by coating the inner surface of the battery compartment 11 with insulating paint; or the insulating layer 30 may be formed by coating the outer surface corresponding to the peripheral edge 21 of the battery 20 with insulating paint. This application does not limit this.

[0148] As shown in Figures 6a-1, 6a-2, and 7a, the insulating layer 30 may also include a first insulating portion 31 and a second insulating portion 32. The first insulating portion 31 is located between the outer side surface 210A of at least a portion of the outer peripheral portion 21 and the inner side surface 111 of the corresponding battery compartment 11, and the second insulating portion 32 is located between the bottom surface 210A of at least a portion of the outer peripheral portion 21 and the bottom surface 112 of the corresponding battery compartment 11. The first insulating portion 31 and the second insulating portion 32 are both formed by applying insulating paint. In some embodiments, the first insulating portion 31 may be formed by applying insulating paint on the inner side surface 111 of the battery compartment 11, and the second insulating portion 32 may be formed by applying insulating paint on the bottom surface 112 of the battery compartment 11.

[0149] The material of the insulating varnish is an unsaturated resin or an epoxy resin, which can be either an unsaturated resin or an epoxy resin. The specific selection should be based on actual needs, and the embodiment of the present application does not make the only requirement. The bottom surface 210B of the battery 20 other than the peripheral portion 21 is fixed to the bottom surface 112 of the corresponding battery compartment 11 through the adhesive portion 60. The adhesive portion 60 can be a backing adhesive, or a bonding portion formed after the glue is cured. In addition, the adhesive portion 60 can also form an insulating isolation protection between the battery 20 and the battery compartment 11.

[0150] The insulating layer 30 can also include only the first insulating part 31, which is located between the outer side surface 210A of at least a portion of the outer peripheral edge portion 21 and the inner side surface 111 of the corresponding battery compartment 11, and the first insulating part 31 is formed by coating insulating paint on the inner side surface 111 of the battery compartment 11.

[0151] When the insulating layer 30 includes both a first insulating portion 31 and a second insulating portion 32, and both the first insulating portion 31 and the second insulating portion 32 are formed by coating insulating varnish, the thickness of the first insulating portion 31 and the second insulating portion 32 can be between 20 μm and 30 μm. Compared to conventional electronic devices in which the entire outer periphery of the battery is coated with an insulating film (e.g., a PI film, or a PI film and an easy-to-tear wrapping film, the thickness of the insulating film is at least 50 μm), so that the outer periphery 21 of the battery 20 and the inner side 111 of the battery compartment 11 are insulated, the volume occupied by the insulating layer can be reduced. Thus, when the internal space dimensions of the battery compartment (e.g., length, width, and depth) are the same, a larger installation space can be provided for the battery cells, thereby enabling the use of larger cells or the integration of more cells, thereby increasing the battery capacity and solving the problem that electronic devices cannot meet the standby requirements of electronic devices while achieving the requirements of lightweight and thin electronic devices.

[0152] In one implementation, the first insulating portion 31 may be formed by coating insulating paint on the outer side surface 210A of the outer peripheral edge portion 21 of the battery 20, and the second insulating portion 321 may also be formed by coating insulating paint on the bottom surface 210B of the battery 20 (as shown in FIG. 8 a ).

[0153] In another implementation, as shown in Figures 6a-1 and 6a-2, the first insulating portion 31 can be formed by coating insulating paint on the inner side surface 111 corresponding to the battery compartment 11, and the second insulating portion 321 can also be formed by coating insulating paint on the bottom surface 112 of the battery compartment 11.

[0154] As shown in Figures 6a-1 and 6a-2, the second insulating portion 32 also extends to the lower edge of the first insulating portion 31. The cross-section of the insulating layer 30 is L-shaped. Or it can be understood that the first insulating portion 31 and the second insulating portion 32 are distributed in an L-shape. This can further enhance the insulation effect between the outer peripheral portion 21 of the battery 20 and the battery compartment 11. In particular, it can prevent the electronic device 1 from being in a falling state, where the outer side surface 210A of the outer peripheral portion 21 of the battery 20 meets the bottom surface 210B (see Figure 8a) and collides with and directly electrically contacts the position where the inner side surface 111 of the battery compartment 11 meets the bottom surface 112.

[0155] The lower edge of the first insulating portion 31 refers to a side edge of the first insulating portion 31 close to the bottom of the battery compartment 11 .

[0156] Please refer to Figures 10a and 10b, Figure 10a is a schematic diagram of a partial structure of the housing of the electronic device provided in an embodiment of the present application. Figure 10b is a schematic diagram of the AA section of Figure 10a.

[0157] In some embodiments, the area of ​​the bottom surface 112 of the battery compartment 11 where the second insulating portion 32 is formed has an inwardly recessed groove 110 , and the second insulating portion 32 is entirely located within the groove 110 .

[0158] Alternatively, it can be understood that the orthographic projection of the second insulating portion 32 on the bottom surface 112 of the battery compartment 11 overlaps with the orthographic projection of the groove 110 on the bottom surface 112 of the battery compartment 11 .

[0159] The bottom surface 112 of the groove 110 also connects to the inner side surface 111 of the battery compartment 11. Alternatively, it can be understood that a portion of the inner side surface 111 of the battery compartment 11 also serves as a portion of the side surface of the groove 110. This improves the bonding between the second insulating portion 32 of the insulating layer 30 and the bottom surface 112 of the battery compartment 11.

[0160] In addition, the area where the second insulating portion 32 is formed in the bottom surface 112 of the battery compartment 11 has an inwardly recessed groove 110, and the second insulating portion 32 is entirely located within the groove 110. This further reduces the volume occupied by the second insulating portion 32 of the insulating layer 30, which is beneficial for providing more installation space for the battery cells 20 when the internal space dimensions (e.g., length, width, and depth) of the battery compartment 11 remain the same. This allows for the use of larger battery cells or the integration of a greater number of battery cells, thereby increasing the capacity of the battery 20.

[0161] The thickness of the second insulating portion 32 may be less than, equal to, or greater than the depth of the groove 110 , which is not limited in the present application.

[0162] In one implementation, the thickness of the second insulating portion 32 is greater than the depth of the groove 110 , that is, the second insulating portion 32 protrudes from the bottom surface 112 of the battery compartment 11 .

[0163] In some embodiments, the area of ​​the bottom surface 112 of the battery compartment 11 where the second insulating portion 32 is formed is configured as a rough surface.

[0164] In some embodiments, the thickness of the first insulating portion 31 may be 20 μm to 30 μm, and the thickness of the second insulating portion 32 may be 20 μm to 30 μm.

[0165] It should be understood that the thickness of the first insulating portion 31 can be set to any value between 20 μm and 30 μm, for example, 20 μm, 25.5 μm, 30 μm, etc. The thickness of the second insulating portion 32 can be set to any value between 20 μm and 30 μm, for example, 20 μm, 27.5 μm, 30 μm, etc. The specific setting should be based on actual needs and is not a sole requirement in this embodiment of the application.

[0166] Please refer to Figure 11, which is a dimension diagram of the second insulating part in the embodiment of the present application.

[0167] As shown in Figure 11, in some embodiments, the width W1 of the second insulating portion 32 between the first outer edge portion 211 of the battery and the battery compartment 11 is 5mm to 15mm, the width W2 of the second insulating portion 32 between the second outer edge portion 212 and the battery compartment 11 is 40mm to 60mm, and the width W3 of the second insulating portion 32 between the third outer edge portion 213 and the battery compartment 11 is 5mm to 15mm.

[0168] The width W1 of the second insulating portion 32 between the first outer edge portion 211 of the battery and the battery compartment 11 can be set to any value between 5mm and 15mm, for example, 5mm, 10.5mm, 15mm, etc. The width W2 of the second insulating portion 32 between the second outer edge portion 212 and the battery compartment 11 can be set to any value between 40mm and 60mm, for example, 40mm, 50.5mm, 60mm, etc. The width W3 of the second insulating portion 32 between the third outer edge portion 213 and the battery compartment 11 can be set to any value between 5mm and 15mm, for example, 5mm, 10.5mm, 15mm, etc. The specific setting should be based on actual needs, and the embodiment of this application does not make the only requirement.

[0169] In some embodiments, the area of ​​the inner side surface 111 of the battery compartment 11 where the first insulating portion 31 is formed is configured as a rough surface. The rough surface may be formed by a laser engraving process.

[0170] It should be understood that the rough surface is not limited to being formed by laser engraving, but can also be formed by processes such as sandblasting, etc. This embodiment of the present application does not make this the only requirement.

[0171] It should be noted that the structure of the battery and battery compartment described above in this application is also applicable to non-foldable electronic devices. Detailed description is given below with reference to the accompanying drawings.

[0172] 12a and 12b, FIG12a is a schematic diagram of the assembled structure of a non-foldable electronic device, and FIG12b is a schematic diagram of the exploded structure of the non-foldable electronic device.

[0173] As shown in Figure 12a, the electronic device 1 may include a display screen 12A and a housing 10. One side surface of the display screen 12A is used to display information and provide an interactive interface for the user. This side surface of the display screen 12A is usually defined as its front side, and the other side surface of the display screen 12A opposite to its front side is defined as its back side. The housing 10 is arranged around the sides and back of the display screen 12A to support and fix the display screen 12A. The front side of the display screen 12A is exposed outside the housing 10 for the user to view the display content of the display screen 12A or perform input operations on the electronic device 1. The display screen 12A and the housing 10 together form a storage space, and some components of the electronic device 1 are arranged in the storage space. For example, components such as a circuit board, a battery module, a camera module, a speaker module, and a microphone are arranged in the storage space.

[0174] Typically, the side surface on which display screen 12A is located is defined as the front surface of electronic device 1, and the other side surface of electronic device 1 opposite to the front surface is defined as the back surface. When describing various components of electronic device 1 below, corresponding to the front and back surfaces of electronic device 1, the "front surface" of a component refers to the side surface of the component facing the front of electronic device 1, and the "back surface" of a component refers to the side surface of the component facing the back of electronic device 1.

[0175] As shown in FIG12 b , the electronic device 1 further includes a back cover 13 , which is located on the back of the electronic device 1 . The display screen 12A is supported on the front of the housing 10 , and the back cover 13 is connected to the back of the housing 10 .

[0176] The display screen 10 can be connected and fixed to the housing 10 by, for example, a sealant. The edge of the back cover 13 can overlap the edge of the housing 10 and can be fixedly connected by a sealant.

[0177] The housing 10 houses a mainboard 40, a battery 20, and a camera module 50. A battery compartment 11 is formed within the housing, and the battery 20 is housed within the compartment. The mainboard 40, serving as the core control component of the electronic device 1, typically integrates components such as a central processing unit (CPU) and a graphics processor. For example, the mainboard 40 may be a printed circuit board (PCB). The battery 20 is used to power the entire electronic device 1. The battery 20 can be electrically connected to the mainboard 40, and through electrical connections between the mainboard 40 and other components, the battery 20 supplies power to the other components. The camera module 50 is electrically connected to the mainboard 30 and is used for capturing and distributing video and still images. In addition to the mainboard 40, other PCBs may also be located within the housing, such as a PCB electrically connected to the display 12A (not shown). For ease of illustration, these PCBs, excluding the mainboard 40, may be defined as secondary boards, which may be connected to the mainboard 40 via a flexible printed circuit (FPC). Of course, other components not shown in the figure may also be provided in the accommodating space, such as the aforementioned speaker module, microphone and other components.

[0178] Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation methods. On the contrary, the purpose of introducing the application in conjunction with the implementation methods is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the following description will contain many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0179] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0180] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0181] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this application in specific circumstances.

[0182] In the description of this application, it should be understood that "electrical connection" in this application can be understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals.

[0183] In the description of this application, it should be noted that the term "perpendicular" in this application does not mean absolute perpendicularity. Approximate perpendicularity due to processing errors and assembly errors (for example, an angle of 89.9° between two structural features) is also within the scope of "perpendicular" in this application. The term "parallel" in this application does not mean absolute parallelism. Approximate parallelism due to processing errors and assembly errors (for example, an angle of 0.1° between two structural features) is also within the scope of "parallel" in this application. This application does not make any specific restrictions on this.

[0184] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. An electronic device, characterized in that: include: A housing, wherein the housing is provided with a battery compartment; A battery, wherein the battery is installed in the battery compartment, and the bottom surface of the battery faces the bottom surface of the battery compartment, the outer side surface of the battery faces the inner side surface of the battery compartment, the battery has an outer peripheral portion, the outer side surface of the outer peripheral portion constitutes the outer side surface of the battery, and the bottom surface of the outer peripheral portion constitutes a part of the bottom surface of the battery; Wherein, an insulating layer is provided between at least a portion of the peripheral edge of the battery along its circumference and the corresponding battery compartment to electrically isolate the battery from the battery compartment; Furthermore, the insulating layer includes a first insulating portion, which is located between the outer side surface of at least a portion of the outer peripheral portion and the corresponding inner side surface of the battery compartment, and the first insulating portion is formed by coating insulating paint on the outer side surface of at least a portion of the outer peripheral portion or the inner side surface of the battery compartment.

2. The electronic device according to claim 1, wherein: The insulating layer also includes a second insulating portion, which is located between the bottom surface of at least a portion of the outer peripheral portion and the bottom surface of the corresponding battery compartment, and the second insulating portion is formed by coating insulating paint on the bottom surface of at least a portion of the outer peripheral portion or the bottom surface of the battery compartment.

3. The electronic device according to claim 2, characterized in that: In the insulating layer formed on the battery compartment, the second insulating portion further extends to a lower edge of the first insulating portion; Alternatively, in the insulating layer formed on the outer peripheral edge portion of the battery, the second insulating portion further extends to a lower edge of the first insulating portion.

4. The electronic device according to claim 2, characterized in that: The area of ​​the bottom surface of the battery compartment where the second insulating portion is formed is set to a rough surface; Alternatively, the area on the bottom surface of the battery compartment where the second insulating portion is formed has an inwardly recessed groove, and the second insulating portion is entirely located in the groove.

5. The electronic device according to claim 4, characterized in that: The bottom surface of the groove is also connected to the inner side surface of the battery compartment.

6. The electronic device according to claim 2, characterized in that: The thickness of the first insulating portion is 20 μm to 30 μm, and the thickness of the second insulating portion is 20 μm to 30 μm.

7. The electronic device according to claim 1, wherein: In the depth direction of the battery compartment, the upper edge of the first insulating portion extends to the edge of the opening of the battery compartment.

8. The electronic device according to claim 1, wherein: The area of ​​the inner side surface of the battery compartment where the first insulating portion is formed is configured as a rough surface.

9. The electronic device according to claim 8, characterized in that: The rough surface is formed by laser engraving.

10. The electronic device according to any one of claims 1 to 9, characterized in that: The insulating layer is provided between the entire circumferential area of ​​the outer peripheral edge of the battery and the corresponding battery compartment to form an annular insulating structure arranged around the outer peripheral edge of the battery.

11. The electronic device according to any one of claims 1 to 9, characterized in that: The battery comprises: A battery body, the battery body having a first outer edge portion, a second outer edge portion, a third outer edge portion and a fourth outer edge portion connected end to end, the first outer edge portion and the third outer edge portion are arranged opposite to each other in a first direction, the second outer edge portion and the fourth outer edge portion are arranged opposite to each other in a second direction, and the second outer edge portion is arranged as a power connection portion of the battery body; wherein the first direction and the second direction are perpendicular to each other and are respectively perpendicular to the thickness direction of the battery; A protective plate assembly is disposed on the second outer edge portion and is connected to the first outer edge portion and the second outer edge portion. The third outer edge portion, the third outer edge portion and the fourth outer edge portion together constitute the outer peripheral edge portion of the battery; Among them, the outer side surface of the first outer edge portion and the outer side surface of the third outer edge portion both constitute part of the outer side surface of the battery, the bottom surface of the first outer edge portion and the bottom surface of the third outer edge portion both constitute part of the bottom surface of the battery, and the first outer edge portion and the second outer edge portion of the battery both have the insulating layer between the corresponding parts of the battery compartment.

12. The electronic device according to claim 11, characterized in that: The battery body comprises a battery shell and a battery core, wherein the battery shell is encapsulated with an electrolyte, and the battery core is located in the battery shell and immersed in the electrolyte; The protection plate assembly is mounted on the battery shell and is electrically connected to the power terminal of the battery cell; Furthermore, the outer side surface and the bottom surface of the first outer edge portion and the outer side surface and the bottom surface of the third outer edge portion are formed by the outer surface of the battery case.

13. The electronic device according to claim 11, characterized in that: The insulating layer formed on the battery compartment is also disposed between the second outer edge portion of the battery and the corresponding portion of the battery compartment, and all the insulating layers located on the battery compartment are connected in sequence to form a U-shaped insulating structure.

14. The electronic device according to claim 13, characterized in that: When the insulating layer also includes a second insulating part, the width of the second insulating part between the first outer edge portion of the battery and the battery compartment is 5mm to 15mm, the width of the second insulating part between the second outer edge portion and the battery compartment is 40mm to 60mm, and the width of the second insulating part between the third outer edge portion and the battery compartment is 5mm to 15mm.

15. The electronic device according to any one of claims 1 to 9, characterized in that: The insulating paint is made of unsaturated resin or epoxy resin.

16. The electronic device according to any one of claims 1 to 9, characterized in that: The bottom surface of other parts of the battery except the outer peripheral edge part is adhered and fixed to the bottom surface of the corresponding battery compartment through an adhesive part.

Images