CN111654563A

CN111654563A - Manufacturing method of battery cover and mobile terminal

Info

Publication number: CN111654563A
Application number: CN201910159350.5A
Authority: CN
Inventors: 黄茂昭; 余厚晖
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-03-04
Filing date: 2019-03-04
Publication date: 2020-09-11

Abstract

The application relates to a manufacturing method of a battery cover and a mobile terminal, wherein the manufacturing method of the battery cover comprises the following steps: s110, processing a ceramic plate, wherein the ceramic plate comprises a first surface and a second surface which are arranged oppositely, and a side surface connecting the first surface and the second surface; s120, performing surface wire drawing treatment on the side surface; s130, coating adhesive on the side face, performing injection molding on the part coated with the adhesive by adopting a high polymer material to form a bent edge part, and bending the bent edge part towards the second surface to form an accommodating space with the ceramic plate. The adhesive enables a better joint surface to be formed between the ceramic plate and the high polymer material, and a better hand feeling is formed; the adhesive has a stable process, and after the adhesive is uniformly coated on the side surface, the bonding force between the ceramic plate and the high polymer material is stable and consistent, and the ceramic plate is not easy to deteriorate after being stored at normal temperature. The texture can be increased by the wire drawing treatment, the drawing force between the two can be improved, and the contact area between the two can be increased; the wire drawing treatment is beneficial to filling of the high polymer material, reduces the joint seam between the high polymer material and the ceramic plate, and has smooth hand feeling.

Description

Manufacturing method of battery cover and mobile terminal

Technical Field

The application relates to the technical field of mobile terminals, in particular to a manufacturing method of a battery cover and a mobile terminal.

Background

With the increasing aesthetic level of consumers, the requirements on the appearance of the mobile terminal are higher and higher, and the ceramic structural member is gradually favored by the consumers due to the elegant luster and the good scratch resistance. The ceramic has complex processing technology and higher processing cost, so that the ceramic structural member is difficult to use in batch.

Disclosure of Invention

An embodiment of the application provides a manufacturing method of a battery cover, so as to solve the technical problems that the ceramic structural member is complex in process, high in processing cost and difficult to use on a mobile terminal in batch.

A manufacturing method of a battery cover comprises the following steps:

s110, processing a ceramic plate, wherein the ceramic plate comprises a first surface and a second surface which are arranged oppositely, and a side surface connecting the first surface and the second surface;

s120, performing surface wire drawing treatment on the side surface;

s130, coating adhesive on the side face, performing injection molding on the part, coated with the adhesive, of the side face by adopting a high polymer material to form a bent edge part, wherein the bent edge part is bent towards the second surface and forms an accommodating space together with the ceramic plate.

According to the manufacturing method of the battery cover, the side face of the ceramic plate is subjected to wire drawing treatment and is coated with the adhesive, and the ceramic plate and the high polymer material are subjected to injection molding. The side surface is coated with the adhesive, so that a better joint surface is formed between the ceramic plate and the high polymer material, and a better middle frame hand feeling is formed; and secondly, the adhesive has a stable process, the bonding force between the ceramic plate and the high polymer material is stable and consistent after the adhesive is uniformly coated on the side surface, and the problem of deterioration does not exist during normal-temperature storage. The wire drawing treatment on the side surface can increase the wire drawing texture, obviously improve the drawing force between the ceramic plate and the high polymer material and increase the contact area between the ceramic plate and the high polymer material; secondly, the wire drawing treatment is beneficial to filling of the high polymer material, reduces the joint seam between the high polymer material and the ceramic plate, enables transition between the ceramic plate and the high polymer material to be natural, is smooth in hand feeling, and improves the appearance effect of the battery cover.

In one embodiment, the side surface is a slanted plane.

In one embodiment, S125 is included, and a through hole is formed in the ceramic plate, and the through hole penetrates through the side surface and the second surface.

In one embodiment, the side surface includes a first inclined surface and a second inclined surface, an included angle between the second inclined surface and the first inclined surface is an acute angle, the first inclined surface is connected between the first surface and the second inclined surface, the second inclined surface is connected between the first inclined surface and the second surface, and the first inclined surface and the second inclined surface protrude outward from the ceramic plate.

In one embodiment, S125 is included, and a through hole is formed in the ceramic plate, and the through hole penetrates through the first inclined surface and the second inclined surface.

In one embodiment, the side surface includes a first inclined surface and a second inclined surface, an included angle between the second inclined surface and the first inclined surface is an acute angle, the first inclined surface is connected between the first surface and the second inclined surface, the second inclined surface is connected between the first inclined surface and the second surface, and the first inclined surface and the second inclined surface are recessed in the ceramic plate.

In one embodiment, the method includes step S125 of forming a through hole in the ceramic plate, the through hole penetrating the second inclined surface and the second surface; alternatively, the through hole penetrates through the first inclined surface and the first surface.

In one embodiment, S130 includes applying adhesive on the second surface, and performing injection molding on the portion of the second surface coated with the adhesive by using a polymer material.

In one embodiment, in S130, the thickness of the adhesive applied is 0.002mm to 0.2 mm.

In one embodiment, the ceramic plate is preheated to 100-200 ℃ and then injection molded with the polymer material.

Another embodiment of the present application provides a mobile terminal, so as to solve the technical problems that the ceramic structural member of the mobile terminal has a complex process, is high in processing cost, and is difficult to use in batch on the mobile terminal.

A mobile terminal, comprising a display screen and a battery cover manufactured by the method of any one of claims 1 to 10, wherein the display screen is provided with an accommodating space formed by the flat plate portion and the bent portion.

The mobile terminal comprises a battery cover made of a ceramic plate and a high polymer material, wherein the first inclined plane of the ceramic plate is subjected to wire drawing treatment and is coated with an adhesive, and the ceramic plate and the high polymer material are subjected to injection molding. The first inclined plane can increase the contact area of the ceramic plate and the high polymer material and increase the bonding force between the ceramic plate and the high polymer material. The first inclined plane is coated with adhesive, so that a better joint surface is formed between the ceramic plate and the high polymer material, and a better middle frame hand feeling is formed; and secondly, the process of the adhesive is stable, after the adhesive is uniformly coated on the first inclined plane, the bonding force between the ceramic plate and the high polymer material is stable and consistent, and the problem of deterioration does not exist during normal-temperature storage. The wire drawing treatment of the first inclined surface can increase wire drawing textures, can obviously improve the drawing force between the ceramic plate and the high polymer material, and increase the contact area between the ceramic plate and the high polymer material; secondly, the wire drawing treatment is beneficial to filling of the high polymer material, reduces the joint seam between the high polymer material and the ceramic plate, enables transition between the ceramic plate and the high polymer material to be natural, is smooth in hand feeling, and improves the appearance effect of the battery cover.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of a mobile terminal according to an embodiment;

FIG. 2 is a rear view of the mobile terminal shown in FIG. 1;

fig. 3 is a perspective view of a battery cover of the mobile terminal shown in fig. 1;

FIG. 4 is a cross-sectional view of the cell cover shown in FIG. 3 in a first embodiment;

FIG. 5 is a cross-sectional view of the cell cover shown in FIG. 3 in a second embodiment;

FIG. 6 is a cross-sectional view of the cell cover shown in FIG. 3 in a third embodiment;

FIG. 7 is a top view of the ceramic plate of the battery cover shown in FIG. 6;

FIG. 8 is a cross-sectional view of the cell cover shown in FIG. 3 in a fourth embodiment;

FIG. 9 is a cross-sectional view of the cell cover shown in FIG. 3 in a fifth embodiment;

FIG. 10 is a sectional view of the cell cover shown in FIG. 3 in a sixth embodiment;

fig. 11 is a top view of the ceramic plate of the cell cover shown in fig. 10;

FIG. 12 is a sectional view of the cell cover shown in FIG. 3 in a seventh embodiment;

FIG. 13 is a sectional view of the cell cover shown in FIG. 3 in an eighth embodiment;

FIG. 14 is a sectional view of the cell cover shown in FIG. 3 in a ninth embodiment;

fig. 15 is a top view of the ceramic plate of the cell cover shown in fig. 14;

fig. 16 is a flowchart illustrating a method for manufacturing a battery cover according to an embodiment;

fig. 17 is a flowchart of a method for manufacturing a battery cover according to another embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As used herein, "terminal device" refers to a device capable of receiving and/or transmitting communication signals including, but not limited to, devices connected via any one or more of the following connections:

(1) via wireline connections, such as via Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connections;

(2) via a Wireless interface means such as a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter.

A terminal device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) satellite or cellular telephones;

(2) personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities;

(3) radiotelephones, pagers, internet/intranet access, Web browsers, notebooks, calendars, Personal Digital Assistants (PDAs) equipped with Global Positioning System (GPS) receivers;

(4) conventional laptop and/or palmtop receivers;

(5) conventional laptop and/or palmtop radiotelephone transceivers, and the like.

Referring to fig. 1 and 2, in one embodiment, a mobile terminal 10 is provided, and the mobile terminal 10 may be a smart phone, a computer, a tablet, or the like. The mobile terminal 10 includes a display screen 200, a battery cover 100, and a circuit board. The display screen 200 is fixed on the battery cover 100, and forms an external structure of the mobile terminal 10 together with the battery cover 100, and the circuit board is located inside the mobile terminal 10, and electronic components such as a controller, a storage unit, a power management unit, and a baseband chip are integrated on the circuit board. The display 200 is used to display pictures or fonts, and the circuit board may control the operation of the mobile terminal 10.

In one embodiment, the Display 200 is a Liquid Crystal Display (LCD) screen for displaying information, and the LCD screen may be a Thin Film Transistor (TFT) screen, an In-plane switching (IPS) screen, or a Liquid Crystal Display (SLCD) screen. In another embodiment, the display panel 200 uses an OLED (Organic Light-Emitting display) panel for displaying information, and the OLED panel may be an AMOLED (Active Matrix Organic Light-Emitting Diode) screen or a Super AMOLED (Super Active Matrix Organic Light-Emitting Diode) screen. Under the control of the controller, the display screen 200 can display information and can provide an operation interface for a user.

As shown in fig. 1 and 3, in one embodiment, the battery cover 100 includes a flat plate portion 110 and a beading portion 120. The flat plate portion 110 has a square structure, the bent portion 120 is located around the flat plate portion 110 and is formed by extending the edge of the flat plate portion 110, and the bent portion 120 and the flat plate portion 110 are in smooth transition. The flat plate portion 110 and the bent portion 120 are surrounded to form an accommodating space, the display screen 200 is fixed to the bent portion 120 and covers the accommodating space, and the circuit board is located in the accommodating space.

As shown in fig. 3 and 4, in an embodiment, the flat plate portion 110 includes an outer plate surface 111 and an inner plate surface 112 that are opposite to each other, and the bent edge portion 120 includes an outer wall surface 121 and an inner wall surface 122 that are opposite to each other. The outer plate surface 111 and the outer wall surface 121 are in smooth transition, and the inner plate surface 112 and the inner wall surface 122 are in smooth transition. The outer plate surface 111 and the outer wall surface 121 form an outer surface of the battery cover 100, and the inner plate surface 112 and the inner wall surface 122 form an inner surface of the battery cover 100. The smooth transition between the flat plate portion 110 and the bent edge portion 120 makes the inner surface and the outer surface of the battery cover 100 have no obvious corners, so that the inner surface and the outer surface of the battery cover 100 are flat and smooth, and the hand feeling is good.

As shown in fig. 3 and 4, in an embodiment, the flat plate portion 110 is made of ceramic, the ceramic plate 130 forms the flat plate portion 110, and the bent portion 120 is made of polymer material. Ceramic plate 130 includes oppositely disposed first and

second surfaces

131, 132, and a side surface 137. The first surface 131 is located at one side of the outer surface of the battery cover 100, forming the outer plate surface 111 of the flat plate portion 110. The second surface 132 is located on one side of the inner surface of the battery cover 100, and forms the inner plate surface 112 of the flat plate portion 110. The first surface 131 has an area smaller than that of the second surface 132, and the side 137 is connected between the first surface 131 and the second surface 132. The side surface 137 is an inclined plane, and the arrangement of the side surface 137 can increase the contact area between the flat plate part 110 and the bent edge part 120, increase the binding force between the flat plate part 110 and the bent edge part 120, and prevent the battery cover 100 from being damaged due to impact. In one embodiment, the side surface 137 is processed by surface texturing to increase the roughness of the side surface 137, thereby increasing the bonding force between the flat plate portion 110 and the bent portion 120. In an embodiment, the area of the first surface 131 may be larger than that of the second surface 132, so as to increase the ceramic texture of the outer surface of the battery cover 100 and provide a better hand feeling.

As shown in fig. 4, in one embodiment, the flat plate portion 110 is formed of ceramic and polymer material, and the bent portion 120 is made of polymer material. The flat plate portion 110 includes a ceramic plate 130 and a polymer material having a certain thickness. The outer plate 111 of the plate portion 110 is formed of a first surface 131, and the inner plate 112 is formed of a polymer material. The second surface 132 of the ceramic plate 130 is located between the outer plate surface 111 and the inner plate surface 112. The polymer material is in contact with the ceramic plate 130 through the side surface 137 and the second surface 132, the contact area is large, the bonding force between the polymer material and the ceramic plate 130 is strong, and the area of the first surface 131 is smaller than that of the second surface 132, so that the cross section of the ceramic plate 130 forms a wedge-shaped structure in the direction from the inner plate surface 112 to the outer plate surface 111, and the ceramic plate 130 is not separated from the polymer material. In another embodiment, the area of the first surface 131 may be larger than that of the second surface 132, so as to increase the ceramic texture of the outer surface of the battery cover 100 and provide better hand feeling.

As shown in fig. 5 and 6, in an embodiment, the ceramic plate 130 is formed with a through hole 135, the through hole 135 penetrates the side surface 137 and the second surface 132, a portion of the polymer material is located in the through hole 135, and the portion of the polymer material penetrates the ceramic plate 130 like a "nail", so that the bent portion 120 is tightly connected to the flat plate portion 110 and is not separated therefrom.

As shown in fig. 8, in one embodiment, the side 137 includes a first sloped surface 133 and a second sloped surface 134. The first slope 133 and the second slope 134 form a side of the ceramic plate 130, and an included angle between the first slope 133 and the second slope 134 is an acute angle. The orthographic projection of the first slope 133 on the plane of the first surface 131 is located outside the first surface 131; an orthographic projection of the second slope 134 on a plane of the second surface 132 is located outside the second surface 132. It will be appreciated that the first slope 133 and the second slope 134 together form a convex and protruding from the ceramic plate 130. The first surface 131 of the ceramic plate 130 forms the outer plate surface 111 of the plate portion 110, and the second surface 132 of the ceramic plate 130 forms the inner plate surface 112 of the plate portion 110. The first inclined plane 133 and the second inclined plane 134 are both subjected to surface drawing processing, so that the roughness of the first inclined plane 133 and the roughness of the second inclined plane 134 are increased, and the bonding force between the ceramic plate 130 and the polymer material is increased. In one embodiment, as shown in fig. 11, a through hole 135 is formed on the ceramic plate 130, and a portion of the polymer material is located in the through hole 135, and the portion of the polymer material penetrates through the ceramic plate 130 like a "nail", so that the bent portion 120 is tightly connected to the flat portion 110 and is not separated therefrom.

As shown in fig. 9 to 11, in an embodiment, the flat plate portion 110 is made of ceramic and polymer materials, including a ceramic plate 130 and a polymer material having a certain thickness. The outer plate surface 111 of the plate portion 110 is formed of a first surface 131 of the ceramic plate 130, the inner plate surface 112 of the plate portion 110 is formed of a polymer material, and the second surface 132 of the ceramic plate 130 is located between the outer plate surface 111 and the inner plate surface 112. The first inclined surface 133, the second inclined surface 134, and the second surface 132 of the ceramic plate 130 are in contact with the polymer material, increasing a contact area therebetween, so that the connection between the ceramic plate 130 and the polymer material is more secure. In another embodiment, as shown in fig. 10 and 11, a through hole 135 is formed in the ceramic plate 130, the through hole 135 penetrates through the first inclined surface 133 and the second inclined surface 134, a portion of the polymer material is located in the through hole 135, and the portion of the polymer material penetrates through the ceramic plate 130 like a "nail", so that the bent portion 120 is tightly connected to and inseparable from the flat portion 110.

As shown in fig. 12, in an embodiment, the included angle between the first slope 133 and the second slope 134 is an acute angle, and an orthographic projection of the first slope 133 on the plane of the first surface 131 is located in the first surface 131; an orthographic projection of the second slope 134 on a plane of the second surface 132 is located within the second surface 132. It will be appreciated that the first and second

inclined surfaces

133 and 134 together are recessed within the ceramic plate 130. The first surface 131 of the ceramic plate 130 forms the outer plate surface 111 of the plate portion 110, and the second surface 132 of the ceramic plate 130 forms the inner plate surface 112 of the plate portion 110. The first inclined plane 133 and the second inclined plane 134 are both subjected to surface drawing processing, so that the roughness of the first inclined plane 133 and the roughness of the second inclined plane 134 are increased, and the bonding force between the ceramic plate 130 and the polymer material is increased.

As shown in fig. 13 to 15, in an embodiment, the flat plate portion 110 is made of ceramic and polymer materials, including a ceramic plate 130 and a polymer material having a certain thickness. The outer plate surface 111 of the plate portion 110 is formed of a first surface 131 of the ceramic plate 130, the inner plate surface 112 of the plate portion 110 is formed of a polymer material, and the second surface 132 of the ceramic plate 130 is located between the outer plate surface 111 and the inner plate surface 112. The first inclined surface 133, the second inclined surface 134, and the second surface 132 of the ceramic plate 130 are in contact with the polymer material, increasing a contact area therebetween, so that the connection between the ceramic plate 130 and the polymer material is more secure. In another embodiment, as shown in fig. 14 and 15, the ceramic plate 130 is formed with a through hole 135, the through hole 135 penetrates the second inclined surface 134 and the second surface 132, a portion of the polymer material is located in the through hole 135, and the portion of the polymer material penetrates the ceramic plate 130 like a "nail", so that the bent portion 120 is tightly connected to the flat portion 110 and is not separated therefrom.

As shown in fig. 16, in an embodiment, a method for manufacturing a battery cover 100 is provided, which includes:

s110, processing a ceramic plate, wherein the ceramic plate 130 includes a first surface 131 and a second surface 132 which are opposite to each other, and a side surface 137 connecting the first surface 131 and the second surface 132;

s120, performing surface wire drawing treatment on the side surface 137;

s130, applying an adhesive to the side surface 137, performing injection molding on the side surface 137 by using a polymer material to form the curved portion 110, and forming an accommodating space by the curved portion 110 being bent toward the second surface 132 and enclosing the ceramic plate 130.

As shown in fig. 4 and 17, in an embodiment, the ceramic plate 130 is prepared by a process of dry pressing, casting, or injection molding, and the ceramic plate 130 may have a 2D, 2.5D, or 3D structure. The ceramic plate 130 includes a side surface 137, and the side surface 137 is subjected to surface drawing to increase roughness of the side surface 137 and increase bonding strength between the side surface 137 and a polymer material. The ceramic plate 130 is fixed by a jig, and a glue brushing position is reserved on the side surface 137, and the width of the glue brushing position is not less than 0.1 mm. At room temperature, the side surface 137 is coated with the adhesive, the thickness of the adhesive is 0.002 mm-0.2 mm, preferably 0.05 mm-0.1 mm, the adhesive surface after the adhesive is coated is clean and free from floating and sinking, and the bonding strength is prevented from being influenced. It will be appreciated that the adhesive covers the entire side 137. And providing an injection mold which comprises a female mold and a male mold, wherein after the female mold and the male mold are closed, a cavity in the mold is matched with the shape of the battery cover 100. Placing the ceramic plate 130 after gluing in an injection mold, preheating to 100-200 ℃, preferably 150 ℃, injecting the molten polymer material into the mold, maintaining the pressure and cooling to obtain the ceramic plate 130 as the flat plate part 110, using the polymer material as the battery cover 100 of the bent part 120, and grinding, polishing, spraying paint and fully inspecting to obtain the battery cover 100 with the size and the shape meeting the requirements. In one embodiment, the polymer material is Polyamide (PA) and Glass Fiber (GF) composite material thereof, and the mass percentage of the Glass Fiber (GF) is 10% to 90%. In another embodiment, the polymer material is polyphenylene sulfide (PPS) and Glass Fiber (GF) composite material thereof, and the mass percentage of the Glass Fiber (GF) is 10% to 90%. In another embodiment, the polymer material is a saturated Polyester Butyl Terephthalate (PBT) and a Glass Fiber (GF) composite material, wherein the mass percentage of the Glass Fiber (GF) is 10-90%. In other embodiments, the polymer material may be Polyaryletherketone (PEAK) and Glass Fiber (GF) composite material thereof, and the mass percentage of the Glass Fiber (GF) is 10% to 90%.

As shown in fig. 5 and 17, in an embodiment, the side surface 137 and the second surface 132 of the ceramic plate 130 are adhesively fixed to the polymer material, and the side surface 137 and the second surface 132 are subjected to surface drawing processing, so that the side surface 137 and the second surface 132 have drawing textures, and the roughness of the side surface 137 and the second surface 132 is increased, thereby increasing the drawing force between the ceramic plate 130 and the polymer material. The adhesive is applied to the entire side surface 137 and the entire second surface 132, and the thickness of the adhesive is 0.002mm to 0.2mm, preferably 0.05mm to 0.1 mm. The ceramic plate 130 after the glue is applied is placed in an injection mold and preheated to 100 to 200 ℃, preferably 150 ℃, and the melted polymer material is injected into the mold, and pressure maintaining and cooling are performed to obtain the battery cover 100, wherein the flat plate portion 110 includes the ceramic plate 130 and the polymer material having a certain thickness, and the bent portion 120 is the polymer material. And (4) polishing, painting and fully inspecting the battery cover 100 to obtain the battery cover 100 with the size and the shape meeting the requirements.

As shown in fig. 6, 7 and 17, in one embodiment, the ceramic board 130 is provided with a through hole 135, and the through hole 135 penetrates the side surface 137 and the second surface 132. After the ceramic plate 130 and the polymer material are injection molded, a portion of the polymer material is located in the through hole 135, and the portion of the polymer material penetrates through the ceramic plate 130 like a "nail", so that the bent portion 120 is tightly connected to the flat portion 110 and cannot be separated.

As shown in fig. 8 and 17, in an embodiment, S110 includes processing the ceramic plate 130 such that the side surface 137 thereof includes a first inclined surface 133 and a second inclined surface 134, the second inclined surface 134 forms an acute angle with the first inclined surface 133, and performing surface drawing processing on the first inclined surface 133 and the second inclined surface 134 such that the first inclined surface 133 and the second inclined surface 134 protrude outward from the ceramic plate 130. As shown in fig. 12, the first slope 133 and the second slope 134 may be recessed in the ceramic plate 130. In S120, an adhesive is applied to the first inclined surface 133 and the second inclined surface 134, so that both the first inclined surface 133 and the second inclined surface 134 are bonded and fixed with the polymer material. As shown in fig. 9, in still another embodiment, S110 includes performing surface drawing processing on each of the first slope 133, the second slope 134, and the second surface 132. In S120, an adhesive is applied to the first inclined surface 133, the second inclined surface 134, and the second surface 132, so that the first inclined surface 133, the second inclined surface 134, and the second surface 132 are all bonded and fixed with the polymer material. As shown in fig. 10 and 11, in another embodiment, including S115, a through hole 135 is formed in the ceramic plate 130, and the through hole 135 penetrates the first inclined surface 133 and the second inclined surface 134. After the ceramic plate 130 and the polymer material are injection molded, a portion of the polymer material is located in the through hole 135, and the portion of the polymer material penetrates through the ceramic plate 130 like a "nail", so that the bent portion 120 is tightly connected to the flat portion 110 and cannot be separated.

The present application will be described in detail with reference to examples, but the scope of the present application is not limited thereto.

In the following examples and comparative examples, the pull-out force of the prepared cell cover 100 was measured by the method prescribed for the measurement of the tensile shear strength of GB/T7124-2008 adhesive.

Example 1

The battery cover 100 of the present embodiment is prepared as follows:

(1) machining a ceramic plate 130 having a side 137;

(2) the side 137 is coated with adhesive, and the thickness of the adhesive is 0.08 mm. The ceramic plate 130 after the glue is applied is placed in an injection mold and preheated to 150 ℃, and the molten polybutylene terephthalate (PBT) is injected into the mold, and pressure and cooling are maintained to manufacture the battery cover 100. The results of the pull force tests are listed in table 1.

Example 2

(1) Machining a ceramic plate 130 having a side 137;

(2) the side 137 is coated with adhesive, and the thickness of the adhesive is 0.08 mm. The ceramic plate 130 after the glue coating is placed in an injection mold, preheated to 150 ℃, and the molten Polyamide (PA) and Glass Fiber (GF) composite material thereof are injected into the mold, wherein the mass percentage of the Glass Fiber (GF) is 50%, and the battery cover 100 is prepared after pressure maintaining and cooling. The results of the pull force tests are listed in table 1.

Example 3

(1) Machining a ceramic plate 130 having a side 137;

(2) performing surface wire drawing treatment on the side surface 137;

(3) the side 137 is coated with adhesive, and the thickness of the adhesive is 0.08 mm. The ceramic plate 130 after the glue coating is placed in an injection mold, preheated to 150 ℃, and the molten Polyamide (PA) and Glass Fiber (GF) composite material thereof are injected into the mold, wherein the mass percentage of the Glass Fiber (GF) is 50%, and the battery cover 100 is prepared after pressure maintaining and cooling. The results of the pull force tests are listed in table 1.

Comparative example 1

(1) Machining a ceramic plate 130 having a side 137;

(2) a microporous structure of about 50um is corroded on the side surface 137 by corrosive liquid, the ceramic plate 130 is placed in an injection mold and preheated to 150 ℃, molten polybutylene terephthalate (PBT) is injected into the mold, and the battery cover 100 is manufactured after pressure maintaining and cooling. The results of the pull force tests are listed in table 1.

TABLE 1

	Polymer material	Treatment method	Time of treatment	Drawing force data (MPa)
					Example 1	PBT	Gluing adhesive	Within 7 days	40MPa
Example 2	PA+50％GF	Gluing adhesive	Within 7 days	40MPa
					Example 3	PA+50％GF	Surface wire drawing and gluing adhesive	Within 7 days	60MPa
Comparative example 1	PBT	Etching treatment	Within 7 days	7.15MPa

The results of table 1 show that the battery cover 100 of examples 1 to 3 has a strong drawing strength, so that the strength of the battery cover 100 can be improved to prevent the ceramic plate 130 from being separated from the polymer material by the impact applied to the battery cover 100.

As can be seen from comparison between example 1 and comparative example 1, when the side surface 137 is treated with the adhesive, the ceramic plate 130 and the polymer material are integrally formed by injection molding, and the drawing strength of the battery cover 100 is high.

As can be seen from comparison between example 2 and comparative example 1, when the side surface 137 is treated with the adhesive, the ceramic plate 130 and the polymer material are integrally formed by injection molding, and the drawing strength of the battery cover 100 is high.

When the side surface 137 is treated by the surface drawing method and the adhesive coating method, the ceramic plate 130 and the polymer material are integrally formed by injection molding, and the drawing strength of the battery cover 100 is high, as can be seen from comparison between example 3 and example 2 and comparative example 1.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method for manufacturing a battery cover is characterized by comprising the following steps:

s120, performing surface wire drawing treatment on the side surface;

2. The method of claim 1 wherein the sides are beveled.

3. The method of manufacturing a battery cover according to claim 2, comprising S125, forming a through hole in the ceramic plate, the through hole penetrating the side surface and the second surface.

4. The method of claim 1, wherein the side surface includes a first inclined surface and a second inclined surface, an included angle between the second inclined surface and the first inclined surface is an acute angle, the first inclined surface is connected between the first surface and the second inclined surface, the second inclined surface is connected between the first inclined surface and the second surface, and the first inclined surface and the second inclined surface protrude outward from the ceramic plate.

5. The method of manufacturing a battery cover according to claim 4, comprising S125, forming a through hole in the ceramic plate, wherein the through hole penetrates through the first inclined surface and the second inclined surface.

6. The method for manufacturing a battery cover according to claim 1, wherein the side surface includes a first inclined surface and a second inclined surface, an included angle between the second inclined surface and the first inclined surface is an acute angle, the first inclined surface is connected between the first surface and the second inclined surface, the second inclined surface is connected between the first inclined surface and the second surface, and the first inclined surface and the second inclined surface are recessed in the ceramic plate.

7. The method for manufacturing a battery cover according to claim 6, comprising S125, forming a through hole in the ceramic plate, the through hole penetrating the second inclined surface and the second surface; alternatively, the through hole penetrates through the first inclined surface and the first surface.

8. The method for manufacturing a battery cover according to any one of claims 1 to 7, wherein S130 includes applying an adhesive to the second surface, and performing injection molding on the portion of the second surface coated with the adhesive by using a polymer material.

9. The method for manufacturing a battery cover according to any one of claims 1 to 7, wherein the adhesive is applied to the battery cover in a thickness of 0.002mm to 0.2mm in S130.

10. The method for manufacturing a battery cover according to any one of claims 1 to 7, wherein the ceramic plate is preheated to 100 ℃ to 200 ℃ and then injection-molded with a polymer material.

11. A mobile terminal, comprising a display screen and a battery cover manufactured by the method of any one of claims 1 to 10, wherein the display screen is provided with an accommodating space formed by the flat plate portion and the bent portion.