Rear cover with composite structure and electronic device

Abstract

The application relates to the technical field of electronic equipment, in particular to a rear cover with a composite structure and electronic equipment, the rear cover with the composite structure comprising: a rear cover main body, the rear cover main body being provided with a mounting portion; a hard-shell battery core, the hard-shell battery core comprising a fixed shell, the shape of the fixed shell being matched with the shape of the mounting portion, and the hard-shell battery core being arranged on the mounting portion; and a plurality of fixed connecting pieces, the plurality of fixed connecting pieces being arranged on the fixed shell at intervals, and each fixed connecting piece being connected with the rear cover main body. The rear cover with the composite structure provided by the embodiment is used for combining the hard-shell battery core and the rear cover main body, directly taking part of the fixed shell of the hard-shell battery core as part of the rear cover main body, transferring the thickness of the rear cover to the battery, providing expansion space for the battery, simultaneously not needing to paste the battery on the rear cover main body, saving the thickness space required for pasting adhesive, and helping to further improve the thickness and capacity of the battery.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and in particular to a back cover with a composite structure and an electronic device. Background Technology

[0002] In today's mobile communications market, as users' demands for battery life in mobile phones, tablets, and other devices continue to increase, improving battery capacity has become a significant challenge for manufacturers. For example, most mobile phone batteries currently on the market use pouch cells. During assembly, the phone needs to provide additional thickness space for bonding, as well as bonding and fixing space for the mid-frame. This, to some extent, limits the increase in battery thickness, and consequently, limits the increase in battery capacity. Utility Model Content

[0003] The purpose of this application is to provide a back cover and electronic device with a composite structure, so as to solve to some extent the technical problem that the capacity of mobile phone batteries is difficult to increase due to the limitation of installation space in the prior art.

[0004] This application provides a back cover with a composite structure, including: a back cover body, wherein the back cover body is provided with a mounting portion;

[0005] A rigid-cased battery cell, the rigid-cased battery cell including a fixed outer shell, the shape of the fixed outer shell being adapted to the shape of the mounting portion, the rigid-cased battery cell being disposed on the mounting portion;

[0006] The fixing connectors are multiple in number and are spaced apart on the fixing shell. Each fixing connector is connected to the rear cover body.

[0007] In the above technical solution, the mounting part is a hole structure that penetrates the two sides of the rear cover body, and the fixed outer shell is embedded in the mounting part.

[0008] In any of the above technical solutions, the back cover with the composite structure further includes a reinforcing sheet;

[0009] The fixed outer shell includes an inner wall surface, an outer wall surface, an end surface, and a vertical surface, and at least the vertical surface is provided with the reinforcing plate.

[0010] In any of the above technical solutions, the back cover with the composite structure further includes insulating adhesive paper, which is applied to the end face.

[0011] In any of the above technical solutions, the back cover with the composite structure further includes a protection circuit module, which is disposed on the end face.

[0012] In any of the above technical solutions, the protection circuit module further includes a positive nickel plate and a negative nickel plate, the hard-shell battery cell includes a positive electrode and a negative electrode, the positive nickel plate is connected to the positive electrode, and the negative nickel plate is connected to the negative electrode.

[0013] In any of the above technical solutions, the back cover with the composite structure further includes a head injection molded part, which is disposed in the protection circuit module.

[0014] In any of the above technical solutions, the fixing connector further includes a first connecting part, a second connecting part, and a reinforcing rib. The first connecting part and the second connecting part are arranged at an angle, and the reinforcing rib is disposed between the first connecting part and the second connecting part. The reinforcing rib is connected to both the first connecting part and the second connecting part.

[0015] The first connecting part is connected to the reinforcing piece, and the second connecting part is connected to the rear cover body.

[0016] In any of the above technical solutions, the back cover with the composite structure further includes connecting posts, the number of which is the same as the number of the fixing connectors. The connecting posts are disposed on the side of the mounting part, and each connecting post is detachably connected to one of the fixing connectors.

[0017] This application also provides an electronic device including a back cover with a composite structure as described in any of the above technical solutions, thus possessing all the beneficial technical effects of the back cover with the composite structure, which will not be repeated here.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] The back cover with a composite structure provided in this application includes: a back cover body, the back cover body having a mounting part; a hard-shell battery cell, the hard-shell battery cell including a fixed outer shell, the shape of the fixed outer shell being adapted to the shape of the mounting part, the hard-shell battery cell being disposed in the mounting part; and a number of fixed connectors, the number of fixed connectors being multiple, the multiple fixed connectors being spaced apart from each other on the fixed outer shell, each fixed connector being connected to the back cover body.

[0020] The back cover with a composite structure provided in this embodiment combines the hard-shell battery cell with the back cover body. The part of the hard-shell battery cell that is fixed to the outer shell is directly used as part of the back cover body, transferring the thickness of the back cover to the battery, providing space for the battery to expand its capacity. At the same time, it does not require the battery to be pasted to the back cover body, which also saves the thickness space required for applying adhesive. This helps to further improve the thickness and capacity of the battery, resulting in a significant increase in battery capacity compared to traditional soft-pack batteries.

[0021] The electronic device provided in this application includes the aforementioned composite structure back cover. Therefore, the composite structure back cover can meet users' demand for long battery life to a certain extent, and provides a battery structure that can break through existing space limitations and increase battery capacity, which has important practical significance in improving battery life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 An exploded structural diagram of a rear cover with a composite structure provided in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of the back cover with a composite structure provided in an embodiment of this application;

[0025] Figure 3 Another structural schematic diagram of a back cover with a composite structure provided in an embodiment of this application;

[0026] Figure 4 Another schematic diagram of the structure of the back cover with a composite structure provided in this application embodiment;

[0027] Figure 5 for Figure 4 An enlarged structural diagram of the back cover with a composite structure at point A is provided.

[0028] Figure label:

[0029] 1-Hard-shell battery cell, 2-Fixed outer shell, 201-First end face, 202-Second end face, 203-First vertical face, 204-Second vertical face, 3-Insulating tape, 4-Protective circuit module, 5-Head injection molded part, 6-Reinforcing plate, 7-Fixed connector, 701-First connecting part, 702-Second connecting part, 703-Reinforcing rib, 704-Connecting hole, 8-Rear cover body, 9-Mounting part, 10-Connecting post. Detailed Implementation

[0030] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0031] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0032] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] The following reference Figures 1 to 5 The back cover and electronic device with a composite structure described in the embodiments of this application are illustrated.

[0036] See Figures 1 to 5 As shown, an embodiment of this application provides a back cover with a composite structure. This back cover with a composite structure includes: a back cover body 8, a rigid-shell battery cell 1, and fixing connectors 7. The back cover body 8 is plate-shaped and has an inner surface and an outer surface. The rigid-shell battery cell 1 is covered by a fixing shell 2. The back cover body 8 is provided with a mounting portion 9, the shape of which is adapted to the shape of the fixing shell 2, allowing the battery to be positioned at the location of the mounting portion 9. The mounting portion 9 provides additional mounting space for the rigid-shell battery cell 1, thereby increasing the thickness of the rigid-shell battery cell 1 and thus increasing its capacity. Multiple fixing connectors 7 are provided, spaced apart along the edge of the fixing shell 2. Each fixing connector 7 is connected to the portion of the back cover body 8 surrounding the mounting portion 9, thereby fixing the rigid-shell battery cell 1 to the mounting portion 9.

[0037] Furthermore, the mounting part 9 is specifically a hole structure that penetrates the partial inner and outer surfaces of the rear cover body 8. The fixed outer shell 2 includes an inner wall surface, an outer wall surface, a first end surface 201, a second end surface 202, a first vertical surface 203, and a second vertical surface 204. The inner wall surface and the outer wall surface are the two large surfaces of the fixed outer shell 2. The first end surface 201 and the second end surface 202 are distributed at both ends of the inner wall surface and the outer wall surface, and the first end surface 201 and the second end surface 202 are arranged parallel and spaced apart. The first vertical surface 203 and the second vertical surface 204 are located between the first end surface 201 and the second end surface 202, and are arranged parallel and spaced apart. The inner wall surface, the outer wall surface, the first end surface 201, the second end surface 202, the first vertical surface 203, and the second vertical surface 204 together enclose the shell structure, and the interior of the shell structure forms a receiving space for accommodating the battery cell. Preferably, the inner wall surface, outer wall surface, first end face 201, second end face 202, first vertical surface 203, and second vertical surface 204 are integrally formed from steel plates. Preferably, after the hard-shell battery cell 1 and the rear cover body 8 are installed in place, one side surface of the fixed outer shell 2 is flush with the outer wall surface of the rear cover body 8.

[0038] Furthermore, the back cover with the composite structure also includes a reinforcing sheet 6, which is specifically a steel sheet. There are at least two reinforcing sheets 6. In this embodiment, the first surface 203 and the second surface 204 are both fixedly provided with reinforcing sheets 6. Whether the second end surface 202 is provided with another reinforcing sheet 6 depends on the installation position of the hard-shell battery cell 1 inside the mobile phone.

[0039] The fixing connector 7 includes a first connecting portion 701 and a second connecting portion 702 arranged at an angle. Both the first connecting portion 701 and the second connecting portion 702 are plate-shaped. Preferably, the first connecting portion 701 and the second connecting portion 702 are arranged perpendicularly. More preferably, a reinforcing rib 703 is provided between the first connecting portion 701 and the second connecting portion 702. The reinforcing rib 703 is connected to both the first connecting portion 701 and the second connecting portion 702. At least two reinforcing ribs 703 are provided between each pair of first connecting portions 701 and second connecting portions 702. The first connecting portion 701 is connected to the reinforcing piece 6, and the connection method can be welding. The second connecting portion 702 is connected to the rear cover body 8.

[0040] Optionally, the inner surface of the back cover body 8 is provided with connecting posts 10. The number of connecting posts 10 is the same as the number of fixed connectors 7 and they are arranged one-to-one. The connecting posts 10 are located on the side of the mounting part 9. After the hard-shell battery cell 1 is assembled into the mounting part 9, each connecting post 10 is positioned opposite a second connecting part 702 of a fixed connector 7. The second connecting part 702 is provided with a connecting hole 704. The connecting post 10 is provided with a threaded channel. Fasteners such as screws are used to pass through the connecting hole 704 and are threadedly connected to the connecting post 10 to fix the hard-shell battery cell 1 to the mounting part 9.

[0041] Preferably, before the hard-shell cell 1 is assembled to the mounting part 9, a sealant is applied to the inner wall surface of the mounting part 9, and / or after the hard-shell cell 1 is assembled to the mounting part 9, a sealant is applied to the gap between the fixed housing 2 and the mounting part 9 to ensure the sealing and waterproofing between the mounting part 9 and the fixed housing 2, and to ensure the safety and stability of the hard-shell cell 1 in various operating environments.

[0042] Furthermore, the battery cell is provided with a positive terminal post. In this embodiment, the fixed outer casing 2 serves as the negative terminal of the battery cell.

[0043] Furthermore, the back cover with the composite structure also includes insulating tape 3, which is disposed on the first end face 201 and surrounds the positive electrode post. The insulating tape 3 can be fixed to the first end face 201 by adhesive.

[0044] Furthermore, the back cover with the composite structure also includes a head injection molded part 5, which has a certain thickness, a length not less than the length of the first end face 201, a width not less than the width of the first end face 201, and is disposed on the first end face 201.

[0045] Furthermore, the back cover with this composite structure also includes a PCM (Protection Circuit Module 4). It should be noted that the PCM prevents the hard-shell battery cell 1 from overcharging, over-discharging, or experiencing overcurrent by detecting the state of the hard-shell battery cell 1, ensuring the stable operation of the hard-shell battery cell 1 system. It is an important component of the hard-shell battery cell 1. The PCM is located on the first end face 201, between the head injection molded part 5 and the insulating tape 3. The PCM includes a positive nickel plate and a negative nickel plate. In the initial stage, the PCM is located on the side of the first end face 201. The positive nickel plate is welded to the positive terminal, and the negative nickel plate is reinforced by welding to the fixed outer shell 2. The PCM is then folded so that it faces the first end face 201. Subsequently, the head injection molded part 5 is installed by injection molding. Since the first end face 201 is bonded with insulating tape 3, it can prevent the positive nickel plate from contacting the steel shell and the positive terminal at the same time, thus preventing a short circuit.

[0046] When disassembling and assembling this composite back cover, the hard-shell battery cell 1 is fixed to the back cover body 8 with screws, and the gap between the hard-shell battery cell 1 and the back cover is sealed with waterproof sealant, so that the hard-shell battery cell 1 and the back cover body 8 are integrated as a whole. Finally, the back cover body 8 can be assembled with the mobile phone frame by means of clips, screws, etc. When disassembling, the screws of the hard-shell battery cell 1 need to be removed, and then the waterproof sealant can be removed to remove the hard-shell battery cell 1.

[0047] In summary, the composite structure of the back cover provided in this embodiment combines the hard-shell cell 1 with the back cover body 8. The portion of the fixed outer shell 2 of the hard-shell cell 1 is directly used as part of the back cover body 8, transferring the thickness of the back cover to the battery and providing capacity expansion space for the battery. At the same time, it eliminates the need to paste the battery onto the back cover body 8, saving the thickness space required for adhesive application. This helps to further improve the thickness and capacity of the battery, resulting in a significant increase in battery capacity compared to traditional soft-pack batteries.

[0048] Tests have shown that, compared to conventional mobile phone solutions on the market, the composite structure of this back cover can increase battery capacity by at least 30% compared to conventional pouch batteries.

[0049] Furthermore, the composite structure of the back cover simplifies the assembly structure, reduces the need for additional bonding space on the phone, simplifies the overall structural design of the phone, and reduces production and assembly costs.

[0050] Embodiments of this application also provide an electronic device including a back cover with a composite structure as described in any of the above embodiments, thus possessing all the beneficial technical effects of the back cover with the composite structure, which will not be repeated here.

[0051] This electronic device can be a mobile phone, or a common electronic device with a battery, such as a tablet or laptop.

[0052] The electronic device provided in this application, by using the aforementioned composite structure back cover, can meet users' demand for long battery life to a certain extent, and provides a battery structure that can break through existing space limitations and increase battery capacity, which has important practical significance in terms of improving battery life.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A back cover with a composite structure, characterized in that, include: The rear cover body is provided with a mounting part; A rigid-cased battery cell, the rigid-cased battery cell including a fixed outer shell, the shape of the fixed outer shell being adapted to the shape of the mounting portion, the rigid-cased battery cell being disposed on the mounting portion; The fixing connectors are multiple in number and are spaced apart on the fixing shell. Each fixing connector is connected to the rear cover body.

2. The back cover with a composite structure according to claim 1, characterized in that, The mounting portion is a hole structure that penetrates both sides of the rear cover body, and the fixed outer shell is embedded in the mounting portion.

3. The back cover with a composite structure according to claim 1, characterized in that, The back cover with the composite structure also includes a reinforcing sheet; The fixed outer shell includes an inner wall surface, an outer wall surface, an end surface, and a vertical surface, and at least the vertical surface is provided with the reinforcing plate.

4. The back cover with a composite structure according to claim 3, characterized in that, The back cover with the composite structure also includes insulating adhesive paper, which is applied to the end face.

5. The back cover with a composite structure according to claim 4, characterized in that, The rear cover with the composite structure also includes a protection circuit module, which is disposed on the end face.

6. The back cover with a composite structure according to claim 5, characterized in that, The protection circuit module includes a positive nickel plate and a negative nickel plate. The hard-shell battery cell includes a positive electrode and a negative electrode. The positive nickel plate is connected to the positive electrode, and the negative nickel plate is connected to the negative electrode.

7. The back cover with a composite structure according to claim 5, characterized in that, The rear cover with the composite structure also includes a head injection molded part, which is disposed in the protection circuit module.

8. The back cover with a composite structure according to claim 3, characterized in that, The fixed connector includes a first connecting part, a second connecting part, and a reinforcing rib. The first connecting part and the second connecting part are set at an angle. The reinforcing rib is disposed between the first connecting part and the second connecting part and is connected to both the first connecting part and the second connecting part. The first connecting part is connected to the reinforcing piece, and the second connecting part is connected to the rear cover body.

9. The back cover with a composite structure according to claim 8, characterized in that, The back cover with the composite structure also includes connecting posts, the number of which is the same as the number of the fixing connectors. The connecting posts are disposed on the side of the mounting part, and each connecting post is detachably connected to one of the fixing connectors.

10. An electronic device, characterized in that, The back cover having a composite structure as described in any one of claims 1 to 9.

Images