Battery module and electronic device

Abstract

The application provides a battery module and an electronic device, which are used for quickly transferring heat at a protection plate to a cold zone position, reducing the temperature at the protection plate, making the overall temperature of the battery more uniform, delaying the time of reducing the charging power of the battery, improving the charging speed, and improving the use experience of a user. The battery module comprises a battery and a heat-conducting film. The battery comprises a battery body and a protection plate assembly, the protection plate assembly is located on one side of the battery body along the length direction of the battery body, the heat-conducting film comprises a cladding part and an extension part, the cladding part is located on the same side of the battery body as the protection plate assembly, and the cladding part clads the protection plate assembly, and the extension part is located on one side of the battery body along the thickness direction of the battery body and is connected with the cladding part.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and more particularly to a battery module and an electronic device. Background Technology

[0002] With the continuous development of science and technology, mobile phones and other electronic devices are widely used in people's daily lives and work, and have become indispensable daily necessities. Currently, electronic devices are often powered by batteries. During battery charging, the temperature at the protection board in the battery is relatively high, which affects the battery's charging power, resulting in a longer charging time and impacting the user experience. Utility Model Content

[0003] This application provides a battery module and electronic device for rapidly transferring heat from the protection board to the cool area, thereby reducing the temperature of the protection board, making the overall battery temperature more uniform, delaying the time of battery charging power reduction, improving charging speed, and enhancing the user experience.

[0004] In a first aspect, this application provides a battery module, including a battery and a thermal conductive film. The battery includes a battery body and a protection plate assembly. Along the length direction of the battery body, the protection plate assembly is located on one side of the battery body. The thermal conductive film includes a covering portion and an extension portion. The covering portion is located on the same side of the battery body as the protection plate assembly and covers the protection plate assembly. Along the thickness direction of the battery body, the extension portion is located on one side of the battery body and is connected to the covering portion.

[0005] During the charging process, the temperature rise rate of the protection board assembly is greater than that of the battery body. Conversely, the temperature of the battery body is lower than that of the protection board assembly. In other words, the protection board assembly can be considered the hot zone of the battery module, and the battery body can be considered the cold zone. In this application, the covering portion can transfer the heat generated by the protection board assembly to the extension portion, which then transfers the heat to the battery body, thereby reducing the temperature of the protection board assembly. This results in a more uniform overall temperature of the battery module, delays the reduction in charging power, increases charging speed, and improves the user experience.

[0006] In one embodiment, the battery body has a first end face and a second end face, and the first end face and the second end face are disposed opposite to each other along the length direction of the battery body, and the distance between the first end face and the second end face is a first distance;

[0007] The protective plate assembly and the covering portion are both located on the side of the first end face away from the second end face. The extension portion has a free end face away from the covering portion. The free end face is located between the first end face and the second end face and is spaced apart from both the first end face and the second end face. Along the length direction of the battery body, the distance between the free end face and the first end face is the second distance. The ratio between the second distance and the first distance is greater than or equal to 20%.

[0008] The extension can transfer heat to a location in the battery body that is far from the protection board assembly, thereby achieving rapid cooling of the protection board assembly, making the overall temperature of the battery module more uniform, delaying the time of charging power reduction, increasing charging speed, and improving the user experience.

[0009] In one embodiment, the ratio between the second distance and the first distance is greater than or equal to 50%.

[0010] The extension can transfer heat to a location in the battery body that is far from the protection board assembly, thereby achieving rapid cooling of the protection board assembly, making the overall temperature of the battery module more uniform, delaying the time of charging power reduction, increasing charging speed, and improving the user experience.

[0011] In one embodiment, the ratio between the second distance and the first distance is greater than or equal to 70%.

[0012] The extension can transfer heat to a location in the battery body that is far from the protection board assembly, thereby achieving rapid cooling of the protection board assembly, making the overall temperature of the battery module more uniform, delaying the time of charging power reduction, increasing charging speed, and improving the user experience.

[0013] In one embodiment, the protection board assembly has a third end face, a fourth end face, and a fifth end face. The third end face is the end face of the protection board assembly that is away from the battery body. Along the thickness direction of the protection board assembly, the fourth end face and the fifth end face are arranged opposite to each other and are respectively connected to opposite sides of the third end face.

[0014] The covering portion includes a first part and a second part. The first part is disposed on the third end face, and the second part is disposed on the fourth end face and connected between the first part and the extension portion. The first part and the second part together transfer the heat of the protective plate assembly to the extension portion to achieve cooling of the protective plate assembly.

[0015] In one embodiment, the covering portion further includes a third portion, which is disposed on the fifth end face and connected to the first portion. The first portion, the second portion, and the third portion together transfer the heat of the protective plate assembly to the extension portion to achieve cooling of the protective plate assembly.

[0016] In one embodiment, the battery module further includes a protective film covering the battery body. The protective film has a clearance groove with an opening located on the surface of the protective film opposite to the battery body, and at least a portion of the extension is located in the clearance groove.

[0017] At least a portion of the extension reuses the thickness space of the protective film, allowing the battery module to have a larger thickness space to accommodate the thermal conductive film. This helps to increase the thickness of the thermal conductive film, improve its thermal conductivity, accelerate the temperature reduction of the protective plate assembly, make the overall temperature of the battery module more uniform, delay the time of charging power reduction, increase charging speed, and improve the user experience. Alternatively, it can reduce the space occupied by the thermal conductive film in the thickness direction of the battery module, thus helping to reduce the thickness of the battery module.

[0018] In one embodiment, the thermally conductive film is a graphite film or a graphene film to ensure that the thermally conductive film has a high thermal conductivity, thereby ensuring the thermal conduction efficiency of the thermally conductive film.

[0019] Secondly, this application provides an electronic device, including a housing and a battery module as described in any of the above claims, wherein the battery module is mounted on the housing.

[0020] During the charging process of the electronic device, the temperature rise rate of the protection board assembly is greater than that of the battery body. Conversely, the temperature of the battery body is lower than that of the protection board assembly. In other words, the protection board assembly can be considered a hot zone of the battery module, and the battery body can be considered a cold zone. In this application, the covering portion can transfer the heat generated by the protection board assembly to the extension portion, which then transfers the heat to the battery body, thereby reducing the temperature of the protection board assembly, making the overall temperature of the battery module more uniform, delaying the reduction in charging power, increasing charging speed, and improving the user experience.

[0021] In one embodiment, the extension has a contact surface facing the battery body;

[0022] The electronic device further includes a first adhesive layer, which is bonded between the housing and the battery body and is offset from the extension. The first adhesive layer has an adhesive surface facing the battery body, which is located on the side of the contact surface facing the battery body. Alternatively, the adhesive surface is flush with the contact surface, so that the thermal conductive film does not need to occupy additional thickness space of the housing, which helps to reduce the thickness of the battery module.

[0023] In one embodiment, the housing has a groove with the opening of the groove facing the battery module, and the extension is mounted in the groove.

[0024] At least a portion of the extension can reuse the thickness space of the groove, allowing the electronic device to have a larger thickness space to accommodate the thermal conductive film. This helps to increase the thickness of the thermal conductive film, improve its thermal conductivity, accelerate the temperature reduction of the protection board assembly, make the overall temperature of the battery module more uniform, delay the time of charging power reduction, increase charging speed, and enhance the user experience. Alternatively, it can reduce the space occupied by the thermal conductive film in the thickness direction of the electronic device, helping to reduce the thickness of the battery module and its space occupation in the thickness direction of the electronic device, thus contributing to the miniaturization design of the electronic device.

[0025] In one embodiment, the electronic device further includes a first circuit board, a second circuit board, and a connecting circuit board. The first circuit board, the second circuit board, and the connecting circuit board are all mounted on the housing. Along the length of the battery module, the first circuit board and the second circuit board are located on opposite sides of the battery module. The connecting circuit board is connected between the first circuit board and the second circuit board and is mounted in the groove.

[0026] The extension covers the connecting circuit board.

[0027] The extension can be installed in the groove together with the connecting circuit board without requiring a separate structural design for the housing based on the thermal conductive film, which can reduce the design cost of the housing and improve the product competitiveness of the electronic device.

[0028] In one embodiment, the housing is provided with a clearance hole that penetrates the housing along the thickness direction, and the extension is installed in the clearance hole.

[0029] At least a portion of the extension can reuse the thickness space of the clearance hole, allowing the electronic device to have a larger thickness space to accommodate the thermal conductive film. This helps to increase the thickness of the thermal conductive film, improve its thermal conductivity, accelerate the temperature reduction of the protection board assembly, make the overall temperature of the battery module more uniform, delay the time of charging power reduction, increase charging speed, and enhance the user experience. Alternatively, it can reduce the space occupied by the thermal conductive film in the thickness direction of the electronic device, helping to reduce the thickness of the battery module and its space occupation in the thickness direction of the electronic device, thus facilitating the miniaturization design of the electronic device.

[0030] In one embodiment, the electronic device further includes a heat spreader plate, which is mounted on the side of the housing away from the battery module and is disposed opposite to the clearance hole.

[0031] The extension can be installed in the clearance hole opposite to the heat spreader, without requiring additional structural design of the housing for the heat-conducting film, which can reduce the design cost of the housing and improve the product competitiveness of the electronic device.

[0032] In one embodiment, the electronic device further includes a first circuit board, a second circuit board, and a connecting circuit board. The first circuit board, the second circuit board, and the connecting circuit board are all mounted on the housing. Along the length of the battery module, the first circuit board and the second circuit board are located on opposite sides of the battery module. The connecting circuit board is connected between the first circuit board and the second circuit board and is located on the side of the battery body away from the extension.

[0033] In one embodiment, the housing is provided with a first mounting slot, and the battery module is mounted in the first mounting slot. At least a portion of the battery module can reuse the thickness space of the first mounting slot, thereby reducing the space occupied by the battery module in the electronic device and helping to achieve the miniaturization design of the electronic device. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0035] Figure 1 This is a schematic diagram of the structure of the first electronic device provided in this application;

[0036] Figure 2 yes Figure 1 A schematic diagram of a partial structure of the electronic device shown;

[0037] Figure 3 yes Figure 1A partial structural diagram of the electronic device shown from another angle;

[0038] Figure 4 yes Figure 3 A schematic diagram of the exploded structure of the electronic device shown.

[0039] Figure 5 yes Figure 4 A schematic diagram of the structure of the middle frame of the housing in the electronic device shown;

[0040] Figure 6 yes Figure 4 A schematic diagram of the structure of the first type of battery module in the electronic device shown from another angle;

[0041] Figure 7 yes Figure 6 The exploded structure diagram of the battery module shown.

[0042] Figure 8 yes Figure 6 A schematic diagram of the cross-sectional structure of the battery module shown, cut along point II.

[0043] Figure 9 yes Figure 4 A schematic diagram of the second type of battery module in the electronic device shown from another angle;

[0044] Figure 10 yes Figure 9 The exploded structure diagram of the battery module shown.

[0045] Figure 11 yes Figure 10 A schematic diagram of the cross-sectional structure of the battery module shown, cut along point II.

[0046] Figure 12 yes Figure 4 A schematic diagram of the third type of battery module in the electronic device shown from another angle;

[0047] Figure 13 yes Figure 12 The exploded structure diagram of the battery module shown.

[0048] Figure 14 yes Figure 12 A schematic diagram of the cross-sectional structure of the battery module shown, cut along point II.

[0049] Figure 15 yes Figure 3 A simplified cross-sectional view of the electronic device shown, cut along point II-II.

[0050] Figure 16 yes Figure 3 A simplified cross-sectional view of the electronic device shown after it has been cut along point III-III;

[0051] Figure 17 This is a schematic diagram of the mid-frame structure of the second type of electronic device provided in this application;

[0052] Figure 18 This is a simplified cross-sectional view of the second type of electronic device provided in this application after being cut along point II-II;

[0053] Figure 19 This is a simplified cross-sectional structural diagram of the second electronic device provided in this application after being cut along point III-III. Detailed Implementation

[0054] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0055] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the first electronic device 1000 provided in this application. Figure 2 yes Figure 1 A partial structural schematic diagram of the electronic device 1000 shown. Figure 3 yes Figure 1 A partial structural schematic diagram of the electronic device 1000 shown from another angle.

[0056] The electronic device 1000 can be a mobile phone, tablet computer, laptop computer, in-vehicle infotainment system, smartwatch, smart bracelet, POS machine (point of sales terminal), or other electronic products. This application will use a mobile phone as an example for illustration. For ease of description, the width direction of the electronic device 1000 is defined as the X-axis, the length direction as the Y-axis, and the thickness direction as the Z-axis. The X-axis, Y-axis, and Z-axis are all perpendicular to each other.

[0057] It should be noted that the terms "parallel" and "perpendicular" used in this application to describe relative positional relationships are relative to the current technological level, and not absolute or strict mathematical definitions. Slight deviations are permissible; approximations of parallelism and perpendicularity are acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0058] Electronic device 1000 includes housing 100, display module 200, heat spreader assembly 300, first circuit board 400, second circuit board 500, connecting circuit board 600, and battery module 700. Heat spreader assembly 300, first circuit board 400, second circuit board 500, connecting circuit board 600, and battery module 700 are all mounted on housing 100.

[0059] Please refer to the following: Figure 4 and Figure 5 , Figure 4 yes Figure 3 An exploded view of the electronic device 1000 shown. Figure 5 yes Figure 4 A schematic diagram of the structure of the middle frame 110 of the housing 100 in the electronic device 1000 shown.

[0060] The housing 100 includes a middle frame 110 and a rear cover 120, with the rear cover 120 mounted on one side of the middle frame 110. The middle frame 110 has a first mounting groove 111, a second mounting groove 112, a third mounting groove 113, a recess 114, and a clearance hole 115. The openings of the first mounting groove 111, the second mounting groove 112, and the third mounting groove 113 are all located on the back side 110a of the middle frame 110. The first mounting groove 111, the second mounting groove 112, and the third mounting groove 113 are all recessed from the back side 110a of the middle frame 110 towards the front side 110b (positive Z-axis direction in the diagram). Along the length direction of the middle frame 110 (Y-axis direction in the diagram), the first mounting groove 111 is located in the middle of the middle frame 110. Along the length direction of the middle frame 110, the second mounting groove 112 and the third mounting groove 113 are located on opposite sides of the first mounting groove 111.

[0061] The opening of the groove 114 is located on the bottom wall of the first mounting groove 111 (not shown in the figure). The groove 114 is recessed from the bottom wall of the first mounting groove 111 towards the front surface 110b of the middle frame 110 (positive Z-axis direction in the figure). The clearance hole 115 penetrates the middle frame 110 along the thickness direction (Z-axis direction in the figure). The opening of the clearance hole 115 is located on the bottom wall of the groove 114.

[0062] The back cover 120 is mounted on the side of the middle frame 110 near the back surface 110a of the middle frame 110, and covers the middle frame 110 with a first mounting groove 111, a second mounting groove 112, a third mounting groove 113, a recess 114, and a clearance hole 115. The back cover 120 may be a battery cover for an electronic device 1000.

[0063] The display module 200 is mounted on the side of the mid-frame 110 away from the back cover 120. That is, the display module 200 and the back cover 120 are mounted on opposite sides of the mid-frame 110. When the user uses the electronic device 1000, the display module 200 is placed facing the user, and the back cover 120 is placed away from the user. For example, the display module 200 can be a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display, etc. The display module 200 may include a display panel (not shown) and a display circuit board (not shown). The display panel is mounted on the side of the mid-frame 110 away from the back cover 120, and the display circuit board is mounted in the recess 114 and electrically connected to the display panel, and is used to connect to the first circuit board 400 to realize signal transmission between the display module 200 and the first circuit board 400. For example, the display circuit board can be a flexible printed circuit (FPC).

[0064] The heat spreader assembly 300 is mounted on the side of the middle frame 110 near the front surface 110b of the middle frame 110, and is positioned opposite the clearance hole 115. The heat spreader assembly 300 may include a heat spreader plate and a support member. The heat spreader plate is mounted between the display module 200 and the middle frame 110, and covers the clearance hole 115. The support member is located on the side of the heat spreader plate facing the clearance hole 115 and passes through the clearance hole 115 to improve the flatness of the bottom wall of the groove 114, ensuring the assembly stability of the display circuit board and the connecting circuit board 600 within the groove 114.

[0065] The first circuit board 400, the second circuit board 500, the connecting circuit board 600, and the battery module 700 are all mounted on the side of the middle frame 110 away from the heat spreader assembly 300. Specifically, the first circuit board 400 is mounted in the second mounting slot 112. The second circuit board 500 is mounted in the third mounting slot 113, and the connecting circuit board 600 is mounted in the recess 114, adjacent to the display circuit board of the display module 200, and together with the display circuit board of the display module 200, covers the heat spreader assembly 300. For example, the first circuit board 400 may be the mainboard of the electronic device 1000, the second circuit board 500 may be the subboard of the electronic device 1000, and the connecting circuit board 600 may be a flexible circuit board. The connecting circuit board 600 has a mating surface 601 that is away from the bottom wall of the recess 114.

[0066] In addition, the electronic device 1000 also includes a first adhesive layer 800 and a second adhesive layer 900. The first adhesive layer 800 is located between the housing 100 and the battery module 700, and is bonded between the housing 100 and the battery module 700 to mount the battery module 700 to the housing 100. Specifically, the first adhesive layer 800 is located between the bottom wall of the first mounting groove 111 and the battery module 700, and is bonded between the bottom wall of the first mounting groove 111 and the battery module 700 to mount the battery module 700 to the first mounting groove 111. The first adhesive layer 800 has an adhesive surface 801 facing away from the bottom wall of the first mounting groove 111, and the first adhesive surface 801 bonds to the battery module 700. The first adhesive surface 801 is located on the side of the mating surface 601 facing away from the bottom wall of the groove 114. For example, the first adhesive layer 800 includes two first adhesive portions 810, which are located on opposite sides of the groove 114 along the width direction of the housing 100 (X-axis direction in the figure).

[0067] The second adhesive layer 900 is installed in the groove 114 and adhered to the connecting circuit board 600 to mount the connecting circuit board 600 in the groove 114. The second adhesive layer 900 includes a second adhesive portion 920 and a third adhesive portion 930. The second adhesive portion 920 is located between the heat spreader assembly 300 and the connecting circuit board 600, and adheres to both. For example, there are two second adhesive portions 920, spaced apart. The third adhesive portion 930 is located between the bottom wall of the groove 114 and the connecting circuit board 600, and adheres to both.

[0068] Please see Figures 6 to 8 , Figure 6 yes Figure 4 The diagram shows the structure of the first battery module 700 in the electronic device 1000 from another angle. Figure 7 yes Figure 6 The diagram shows an exploded view of the battery module 700. Figure 8 yes Figure 6 The diagram shows a cross-sectional view of the battery module 700 cut along point II. Here, "cut along point II" refers to cutting along the plane containing line II; other similar descriptions in this document can be understood in the same way.

[0069] The battery module 700 is mounted in the first mounting slot 111 and covers the display circuit board, connecting circuit board 600, and first adhesive layer 800 of the display module 200. At least a portion of the battery module 700 can reuse the thickness space of the first mounting slot 111, reducing the space occupied by the battery module 700 within the electronic device 1000 and contributing to the miniaturization design of the electronic device 1000. The battery module 700 is located between the first circuit board 400 and the second circuit board 500. The battery module 700 includes a battery 710, a thermally conductive film 720, and a protective film 730, both of which are mounted on the battery 710.

[0070] The battery 710 includes a battery body 740, a protection board assembly 750, and an electrical connector 760. Along the length direction of the battery body 740 (Y-axis direction in the figure), the protection board assembly 750 and the electrical connector 760 are both located on the same side of the battery body 740. The battery body 740 has a first end face 741, a second end face 742, and a peripheral side face 743. Along the length direction of the battery body 740, the first end face 741 and the second end face 742 are arranged opposite to each other. The distance between the first end face 741 and the second end face 742 along the length direction of the battery body 740 is a first distance L1. The peripheral side face 743 connects the first end face 741 and the second end face 742. The peripheral side face 743 includes a first side face 744 and a second side face 745. The first side face 744 faces the bottom wall of the first mounting groove 111. Along the thickness direction of the battery body 740 (Z-axis direction in the figure), the second side face 745 is arranged opposite to the first side face 744. The first side surface 744 and the second side surface 745 are both connected between the first end surface 741 and the second end surface 742.

[0071] Both the protection board assembly 750 and the electrical connector 760 are located on the side of the first end face 741 facing away from the second end face 742. The protection board assembly 750 is electrically connected to the battery body 740 and includes a protection circuit board (not shown). The protection board assembly 750 has a third end face 751, a fourth end face 752, and a fifth end face 753. The third end face 751 is the surface of the protection board assembly 750 facing away from the battery body 740. The fourth end face 752 faces the bottom wall of the first mounting groove 111 and has the same orientation as the first side face 744. Along the thickness direction of the protection board assembly 750 (the Z-axis direction shown in the figure), the fifth end face 753 is disposed opposite to the fourth end face 752 and has the same orientation as the second side face 745. The fourth end face 752 and the fifth end face 753 are respectively connected to opposite sides of the third end face 751.

[0072] Electrical connector 760 is electrically connected to and folded relative to the protection board assembly 750, and is used for electrical connection with the first circuit board 400 to achieve electrical connection between the battery module 700 and the first circuit board 400. Specifically, electrical connector 760 is folded on the side of the fifth end face 753 opposite to the fourth end face 752. There are two electrical connectors 760, located at opposite ends of the protection board assembly 750 along its length (X-axis direction in the figure), and spaced apart from each other. For example, electrical connector 760 can be a flexible circuit board.

[0073] In this embodiment, the thermally conductive film 720 can be a graphite film made of graphite or a graphene film made of graphene, to ensure that the thermally conductive film 720 has a high thermal conductivity, thereby ensuring the heat conduction efficiency of the thermally conductive film 720. The thermally conductive film 720 includes a covering portion 721 and an extension portion 722, with the extension portion 722 connected to the covering portion 721. The covering portion 721 is located on the same side of the battery body 740 as the protection plate assembly 750, and covers the protection plate assembly 750. The covering portion 721 includes a first portion 723, a second portion 724, and a third portion 725. The first portion 723 is disposed on the third end face 751. The second portion 724 is disposed on the fourth end face 752 and connected to the first portion 723. The third portion 725 is disposed on the fifth end face 753 and connected to the first portion 723, and is located on the fifth end face 753 and connected to the electrical connector 760, and is also spaced apart from the electrical connector 760. For example, the covering portion 721 is C-shaped. The first portion 723, the second portion 724 and the third portion 725 together transfer the heat of the protective plate assembly 750 to the extension portion 722 to achieve rapid cooling of the protective plate assembly 750.

[0074] Along the thickness direction of the battery body 740, the extension 722 is located on one side of the battery body 740 and is connected to the second portion 724. In this embodiment, the extension 722 is located on the side of the first side 744 facing away from the second side 745. It should be noted that during the charging process of the electronic device 1000, the temperature rise rate of the protection board assembly 750 is greater than that of the battery body 740. Compared to the protection board assembly 750, the temperature of the battery body 740 is lower than that of the protection board assembly 750. In other words, the protection board assembly 750 can be regarded as the hot zone of the battery module 700, and the battery body 740 can be regarded as the cold zone of the battery module 700.

[0075] In this embodiment, the covering portion 721 can transfer the heat generated by the protection board assembly 750 to the extension portion 722, and the extension portion 722 can then transfer the heat to the battery body 740, thereby reducing the temperature of the protection board assembly 750, making the overall temperature of the battery module 700 more uniform, delaying the time of charging power reduction, improving charging speed, and enhancing the user experience. In some other embodiments, the extension portion 722 may also be located on the side of the second side 745 opposite to the first side 744; this application does not impose specific limitations on this.

[0076] The extension 722 has a contact surface 726 and a free end face 727. The contact surface 726 is the surface of the extension 722 facing the battery body 740. The free end face 727 is the end face of the extension 722 facing away from the covering portion 721 and connected to the contact surface 726. Along the length direction of the battery body 740, the free end face 727 is located between the first end face 741 and the second end face 742, and is spaced apart from both the first end face 741 and the second end face 742. Along the length direction of the battery body 740, the distance between the free end face 727 and the first end face 741 is a second distance L2, and the ratio of the second distance L2 to the first distance L1 is greater than or equal to 70%. The extension 722 can transfer heat to a location in the battery body 740 that is farther away from the protection board assembly 750, thereby achieving rapid cooling of the protection board assembly 750, making the overall temperature of the battery module 700 more uniform, delaying the time of charging power reduction, improving charging speed, and enhancing the user experience. In some other embodiments, the ratio of the second distance L2 to the first distance L1 may be greater than or equal to 20%, or the ratio of the second distance L2 to the first distance L1 may be greater than or equal to 50%, or the ratio of the second distance L2 to the first distance L1 may be less than 20%. This application does not impose any specific restrictions on this.

[0077] A protective film 730 covers the battery body 740. Specifically, the protective film 730 is disposed on the peripheral side 743 and partially covers the peripheral side 743 to protect the battery body 740. The protective film 730 is located between the peripheral side 743 and the extension 722. That is, the extension 722 is located on the side of the protective film 730 facing away from the first side 744, and the contact surface 726 contacts the protective film 730. For example, the protective film 730 can be a pull-out film. In some other embodiments, the battery module 700 may not include the protective film 730; this application does not impose specific limitations on this.

[0078] Please see Figures 9 to 11 , Figure 9 yes Figure 4 The diagram shows the structure of the second type of battery module 700 in the electronic device 1000 from another angle. Figure 10 yes Figure 9 The diagram shows an exploded view of the battery module 700. Figure 11 yes Figure 10 The diagram shows a cross-sectional view of the battery module 700 taken along point II.

[0079] The battery module 700 shown in this embodiment differs from the first type of battery module 700 described above in that the protective film 730 is provided with a relief groove 731, the opening of which is located on the surface of the protective film 730 facing away from the battery body 740. The relief groove 731 is recessed from the surface of the protective film 730 facing away from the battery body 740 toward the battery body 740, and penetrates both the surface of the protective film 730 toward the battery body 740 and the end face of the protective film 730 toward the protection plate assembly 750. That is, the relief groove 731 penetrates the protective film 730 along its thickness direction and exposes the peripheral side surface 743 of the battery body 740. Specifically, the relief groove 731 is located on the side of the protective film 730 closest to the first side surface 744 and exposes the first side surface 744.

[0080] At least a portion of the extension 722 is located in the clearance groove 731. Specifically, the extension 722 is inserted into the clearance groove 731, and the contact surface 726 contacts the first side surface 744. At least a portion of the extension 722 reuses the thickness space of the protective film 730, allowing the battery module 700 to have a larger thickness space to accommodate the thermal conductive film 720. This helps to increase the thickness of the thermal conductive film 720, improve the thermal conductivity of the thermal conductive film 720, accelerate the temperature reduction of the protection board assembly 750, make the overall temperature of the battery module 700 more uniform, delay the time of charging power reduction, improve charging speed, and enhance the user experience. Alternatively, it can reduce the space occupied by the thermal conductive film 720 in the thickness direction of the battery module 700, helping to reduce the thickness of the battery module 700 and the space occupied by the battery module 700 in the thickness direction of the electronic device 1000, thus contributing to the miniaturization design of the electronic device 1000.

[0081] Please see Figures 12 to 14 , Figure 12 yes Figure 4 The diagram shows the structure of the third type of battery module 700 in the electronic device 1000 from another angle. Figure 13 yes Figure 12 The diagram shows an exploded view of the battery module 700. Figure 14 yes Figure 12 The diagram shows a cross-sectional view of the battery module 700 taken along point II.

[0082] The battery module 700 shown in this embodiment differs from the first and second battery modules 700 described above in that the covering portion 721 does not include the third portion 725, but only includes the first portion 723 and the second portion 724. The first portion 723 is disposed on the third end face 751. The second portion 724 is disposed on the fourth end face 752 and is connected to the first portion 723 and the extension portion 722. For example, the covering portion 721 is L-shaped. The first portion 723 and the second portion 724 together transfer the heat of the protection plate assembly 750 to the extension portion 722 to achieve cooling of the protection plate assembly 750.

[0083] Please see Figure 15 and Figure 16 , Figure 15 yes Figure 3 The diagram shows a simplified partial cross-sectional view of the electronic device 1000 after it has been cut along line II-II. Figure 16 yes Figure 3 This is a simplified cross-sectional view of the electronic device 1000 after being cut along point III-III. Figure 15 and Figure 16 The battery module 700 shown is the first type of battery module 700 mentioned above.

[0084] In this embodiment, the opening of the groove 114 faces the battery module 700. The first adhesive layer 800 is bonded to the protective film 730 of the battery module 700 to mount the battery module 700 in the first mounting groove 111. The extension 722 is mounted in the groove 114 and covers the display circuit board, the connection circuit board 600, and the heat spreader assembly 300 of the display module 200. The extension 722 can be mounted in the groove 114 together with the connection circuit board 600, eliminating the need for a separate design for the structure of the housing 100 for the thermal conductive film 720, thus reducing the design cost of the housing 100 and improving the product competitiveness of the electronic device 1000. The contact surface 726 of the extension 722 is flush with the adhesive surface 801 of the first adhesive layer 800, so that the thermal conductive film 720 does not need to occupy additional thickness space of the housing 100, which helps to reduce the thickness of the battery module 700 and achieve miniaturization of the electronic device 1000.

[0085] Furthermore, at least a portion of the extension 722 can reuse the thickness space of at least one of the groove 114, the clearance hole 115, and the first adhesive layer 800, allowing the electronic device 1000 to have a larger thickness space to accommodate the thermal conductive film 720. This helps to increase the thickness of the thermal conductive film 720, improve the thermal conductivity of the thermal conductive film 720, accelerate the temperature reduction of the protection board assembly 750, make the overall temperature of the battery module 700 more uniform, delay the time of charging power reduction, improve the charging speed, and enhance the user experience. Alternatively, it can reduce the space occupied by the thermal conductive film 720 in the thickness direction of the electronic device 1000, which helps to reduce the thickness of the battery module 700 and the space occupied by the battery module 700 in the thickness direction of the electronic device 1000, thus helping to achieve the miniaturization design of the electronic device 1000.

[0086] In some other embodiments, the contact surface 726 of the extension 722 may also be located on the side of the first adhesive layer 800 facing the bottom wall of the first mounting groove 111, or the contact surface 726 of the extension 722 may also be located on the side of the first adhesive layer 800 away from the bottom wall of the first mounting groove 111.

[0087] Please see Figures 17 to 19 , Figure 17 This is a schematic diagram of the structure of the middle frame 110 of the second type of electronic device 1000 provided in this application. Figure 18 This is a simplified cross-sectional view of the second type of electronic device 1000 provided in this application, cut along point II-II. Figure 19 This is a simplified cross-sectional structural diagram of the second type of electronic device 1000 provided in this application after being cut along point III-III.

[0088] The electronic device 1000 shown in this embodiment differs from the first type of electronic device 1000 described above in that the middle frame 110 does not have a groove 114, and the opening of the clearance hole 115 is located on the bottom wall of the first mounting groove 111. The extension 722 of the thermal conductive film 720 is installed in the clearance hole 115 and covers the heat spreader assembly 300. The extension 722 can be installed in the clearance hole 115 which is opposite to the heat spreader assembly 300, eliminating the need for additional structural design of the housing 100 for the thermal conductive film 720, thus reducing the design cost of the housing 100 and improving the product competitiveness of the electronic device 1000.

[0089] The connecting circuit board 600 is located on the side of the battery module 700 opposite to the bottom wall of the first mounting groove 111. The second adhesive layer 900 is located between the connecting circuit board 600 and the battery module 700, and is bonded between them. Specifically, the second adhesive layer 900 is located between the connecting circuit board 600 and the battery body 740, and is bonded between them.

[0090] In the electronic device 1000 shown in this embodiment, at least a portion of the extension 722 can reuse the thickness space of the clearance hole 115 and / or the first adhesive layer 800. The electronic device 1000 can have a larger thickness space to accommodate the thermal conductive film 720, which helps to increase the thickness of the thermal conductive film 720, improve the thermal conductivity of the thermal conductive film 720, accelerate the temperature reduction of the protection board assembly 750, make the overall temperature of the battery module 700 more uniform, delay the time of charging power reduction, improve the charging speed, and enhance the user experience. Alternatively, it can reduce the space occupied by the thermal conductive film 720 in the thickness direction of the electronic device 1000, which helps to reduce the thickness of the battery module 700 and the space occupied by the battery module 700 in the thickness direction of the electronic device 1000, thus helping to achieve the miniaturization design of the electronic device 1000.

[0091] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Where there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery module, characterized in that, The device includes a battery and a thermally conductive film. The battery includes a battery body and a protection plate assembly. Along the length direction of the battery body, the protection plate assembly is located on one side of the battery body. The thermally conductive film includes a covering portion and an extension portion. The covering portion is located on the same side of the battery body as the protection plate assembly and covers the protection plate assembly. Along the thickness direction of the battery body, the extension portion is located on one side of the battery body and is connected to the covering portion.

2. The battery module according to claim 1, characterized in that, The battery body has a first end face and a second end face. Along the length direction of the battery body, the first end face and the second end face are arranged opposite to each other, and the distance between the first end face and the second end face is a first distance. The protective plate assembly and the covering portion are both located on the side of the first end face away from the second end face. The extension portion has a free end face away from the covering portion. The free end face is located between the first end face and the second end face and is spaced apart from both the first end face and the second end face. Along the length direction of the battery body, the distance between the free end face and the first end face is the second distance. The ratio between the second distance and the first distance is greater than or equal to 20%.

3. The battery module according to claim 2, characterized in that, The ratio between the second distance and the first distance is greater than or equal to 50%.

4. The battery module according to claim 3, characterized in that, The ratio between the second distance and the first distance is greater than or equal to 70%.

5. The battery module according to any one of claims 1 to 4, characterized in that, The protection board assembly has a third end face, a fourth end face, and a fifth end face. The third end face is the end face of the protection board assembly that is away from the battery body. Along the thickness direction of the protection board assembly, the fourth end face and the fifth end face are arranged opposite to each other and are respectively connected to the opposite sides of the third end face. The covering portion includes a first portion and a second portion. The first portion is disposed on the third end face, and the second portion is disposed on the fourth end face and connected between the first portion and the extension portion.

6. The battery module according to claim 5, characterized in that, The covering part further includes a third part, which is disposed on the fifth end face and connected to the first part.

7. The battery module according to any one of claims 1 to 4, characterized in that, The battery module also includes a protective film that covers the battery body. The protective film has a clearance groove with the opening of the clearance groove located on the surface of the protective film away from the battery body, and at least a portion of the extension is located in the clearance groove.

8. The battery module according to claim 1, characterized in that, The thermally conductive film is a graphite film or a graphene film.

9. An electronic device, characterized in that, It includes a housing and a battery module as described in any one of claims 1 to 8, wherein the battery module is mounted on the housing.

10. The electronic device according to claim 9, characterized in that, The extension has a contact surface facing the battery body; The electronic device further includes a first adhesive layer, which is bonded between the housing and the battery body and is offset from the extension. The first adhesive layer has an adhesive surface facing the battery body, which is located on the side of the contact surface facing the battery body, or the adhesive surface is flush with the contact surface.

11. The electronic device according to claim 9 or 10, characterized in that, The housing has a groove with the opening facing the battery module, and the extension is mounted in the groove.

12. The electronic device according to claim 11, characterized in that, The electronic device further includes a first circuit board, a second circuit board, and a connecting circuit board. The first circuit board, the second circuit board, and the connecting circuit board are all mounted on the housing. Along the length of the battery module, the first circuit board and the second circuit board are located on opposite sides of the battery module. The connecting circuit board is connected between the first circuit board and the second circuit board and is mounted in the groove. The extension covers the connecting circuit board.

13. The electronic device according to claim 9 or 10, characterized in that, The housing is provided with a clearance hole that penetrates the housing along the thickness direction, and the extension is installed in the clearance hole.

14. The electronic device according to claim 13, characterized in that, The electronic device also includes a heat spreader plate, which is installed on the side of the housing away from the battery module and is positioned opposite to the clearance hole.

15. The electronic device according to claim 13, characterized in that, The electronic device further includes a first circuit board, a second circuit board, and a connecting circuit board. The first circuit board, the second circuit board, and the connecting circuit board are all mounted on the housing. Along the length of the battery module, the first circuit board and the second circuit board are located on opposite sides of the battery module. The connecting circuit board is connected between the first circuit board and the second circuit board and is located on the side of the battery body away from the extension.

16. The electronic device according to claim 9, characterized in that, The housing is provided with a first mounting slot, and the battery module is mounted in the first mounting slot.

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