CN111835888B

CN111835888B - Battery cover, preparation method thereof and mobile terminal

Info

Publication number: CN111835888B
Application number: CN201910313336.6A
Authority: CN
Inventors: 吉斌; 温权浩
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2022-01-25
Anticipated expiration: 2039-04-18
Also published as: CN111835888A

Abstract

The application provides a battery cover, a preparation method thereof and a mobile terminal, wherein the battery cover comprises a base material, an optical coating layer and a spraying color layer, the base material comprises a main body part and side edge parts extending from the edge of the main body part, the main body part and the side edge parts form an accommodating groove, the base material comprises an inner surface, an outer surface and a side peripheral surface connecting the inner surface and the outer surface, and the inner surface comprises a first surface formed on the main body part and a second surface formed on the side edge parts. The optical coating layer is arranged on the first surface. The spraying color layer is arranged on the second surface. The color that presents behind this application battery cover lateral part printing opacity can maintain the depth unanimous, reduces the risk that the heterochrosis appears behind the printing opacity of battery cover lateral part, satisfies the user to the demand that battery cover outward appearance effect used.

Description

Battery cover, preparation method thereof and mobile terminal

Technical Field

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

Background

The inner surface of a battery cover of a mobile terminal such as a smart phone and a tablet personal computer is generally coated with an optical coating film, so that the color and the metal texture of the battery cover are enhanced, and the use requirement of a user on diversified appearance effects of the battery cover is met. In the related art, the battery cover includes a main body portion and side portions extending from edges of the main body portion, the main body portion and the side portions form a receiving groove, and an optical coating process is performed on a groove wall of the receiving groove to form an optical coating layer.

Disclosure of Invention

The first aspect of the application discloses a battery cover, which aims to solve the technical problem that the appearance using effect of the battery cover is influenced due to the fact that the peripheral edge of the battery cover is heterochromatic because the optical coating layer thickness distribution of the side edge part of the battery cover is not uniform.

A battery cover, comprising:

the base material comprises a main body part and side parts extending from the edges of the main body part, wherein the main body part and the side parts form an accommodating groove;

the optical coating layer is arranged on the first surface; and

and the spraying color layer is arranged on the second surface.

In the battery cover, the optical coating layer can provide better color and metal texture for the base material, and the spraying color layer can provide a gorgeous effect with uniform color for the base material. The optical coating layer is only formed on the main body part but not on the side edge part, so that the problem that the side edge part has different colors (namely the side edge part has different color shades after being transparent) due to uneven distribution of the optical coating layer thickness of the side edge part in the optical coating process can be avoided. Because the thickness of spraying colour layer is convenient for control among the spraying process, locate side portion with spraying colour layer to the thickness of side portion spraying colour layer can be close to and distribute evenly, thereby makes the colour that presents after the side portion printing opacity can maintain the depth unanimity, satisfies the demand that the user used to battery cover outward appearance effect.

In one embodiment, the sprayed color layer extends from the side edge part to the main body part and covers the side of the optical coating layer far away from the main body part.

In one embodiment, the battery cover includes a hardened layer disposed on the outer surface.

In one embodiment, the thickness value of the optical coating layer is 0.02mm-0.05 mm.

In one embodiment, the thickness of the sprayed color layer is 0.02mm to 0.04 mm.

The second aspect of the present application discloses a mobile terminal, which is used for solving the technical problem that the appearance using effect of a battery cover is affected due to the fact that the peripheral edge of the battery cover is colored differently because the optical coating layer thickness distribution of the side edge part of the battery cover is not uniform.

A mobile terminal comprises the battery cover.

In the mobile terminal, the color of the periphery of the battery cover after the side edge part is transparent can be kept consistent, so that the requirement of a user on the use of the appearance effect of the battery cover is met, and the mobile terminal comprising the battery cover can also meet the requirement of the user on the use of the appearance effect of the battery cover.

The third aspect of the application discloses a preparation method of a battery cover, which aims to solve the technical problem that the appearance using effect of the battery cover is influenced due to the fact that the peripheral circle of the battery cover is heterochromatic because the optical coating layer thickness distribution of the side edge part of the battery cover is not uniform.

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

providing a base material, wherein the base material comprises a main body part and a side part extending from the edge of the main body part, the main body part and the side part form a containing groove, the base material comprises an inner surface, an outer surface and a side peripheral surface connecting the inner surface and the outer surface, and the inner surface comprises a first surface formed on the main body part and a second surface formed on the side part;

forming an optical coating layer on the first surface; and

and forming a spraying color layer on the second surface.

In one embodiment, the forming of the optical coating layer on the first surface comprises the following steps:

providing a coating jig, wherein the coating jig comprises a body and a shielding piece, and the body is provided with a containing groove;

placing the base material in the accommodating groove, enabling the main body part to be attached to the groove bottom of the accommodating groove, and enabling the shielding piece to cover the second surface;

and carrying out optical coating treatment on the first surface.

In one embodiment, the forming a sprayed color layer on the second surface includes the following steps:

providing a spraying jig, wherein the spraying jig is provided with a containing groove;

placing the base material with the optical coating layer formed in the accommodating groove, and attaching the main body part to the groove bottom of the accommodating groove;

and spraying the second surface to form the spraying color layer on the second surface.

detaching the shielding piece to expose the second surface;

In one embodiment, the step of spraying the second surface includes the steps of:

and spraying one side of the optical coating layer, which is far away from the main body part, so that the spraying color layer covers one side of the optical coating layer, which is far away from the main body part.

In one embodiment, after the step of forming the sprayed color layer on the second surface, the method for manufacturing a battery cover further includes the steps of:

and forming a hardening layer on the outer surface to obtain the prefabricated member.

In one embodiment, after the step of forming the hardened layer on the outer surface, the method for manufacturing the battery cover further includes the steps of:

and processing the prefabricated member by using a numerical control lathe to form a functional hole in the prefabricated member so as to obtain a formed member.

In one embodiment, the substrate is manufactured by integral injection molding, and the substrate is formed with the functional holes.

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 an assembly diagram of a battery cover, a middle frame and a front cover in a mobile terminal according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a cell cover according to the embodiment of FIG. 1;

FIG. 3 is an enlarged view of the embodiment A in FIG. 2;

FIG. 4 is a schematic structural diagram of a substrate of the battery cover of FIG. 2 according to one embodiment;

FIG. 5 is a schematic view of an embodiment of an optical coating process performed by placing a substrate into a coating fixture;

FIG. 6 is an enlarged view of the embodiment B of FIG. 5;

FIG. 7 is a schematic structural diagram illustrating an embodiment of a spraying process performed on an optically coated substrate by a spraying jig;

FIG. 8 is an enlarged view of the embodiment C of FIG. 7;

fig. 9 is an enlarged view of another embodiment C in fig. 7.

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, in an embodiment, a mobile terminal 10 is described by taking a mobile phone as an example, and the mobile terminal 10 includes a battery cover 100, a middle frame 200 and a front cover 300. The battery cover 100 is required to be matched with the middle frame 200 and the front cover 300 of the mobile terminal 10 during a specific use process. The battery cover 100, the middle frame 200 and the front cover 300 are sequentially stacked, the middle frame 200 and the front cover 300 form a front case of the mobile terminal 10, and the battery cover 100, the middle frame 200 and the front cover 300 of the mobile terminal 10 cooperate to form a receiving space for receiving electronic components of the mobile terminal 10, such as a circuit board, a battery, a camera module, a fingerprint module and the like.

As shown in fig. 2, 3 and 4, in one embodiment, the battery cover 100 includes a substrate 110, and an optical coating layer 120, a sprayed color layer 130 and a hardening layer 140 disposed on the substrate 110.

In one embodiment, as shown in fig. 4, the substrate 110 includes a main body 111 and a side portion 112 extending from an edge of the main body 111, the main body 111 and the side portion 112 form a receiving slot 1101, and the receiving slot 1101 is used for receiving an electronic component of the mobile terminal 10. The substrate 110 includes an inner surface 110a, an outer surface 110b, and a side circumferential surface 110c connecting the inner surface 110a and the outer surface 110b, and the inner surface 110a can be understood as a groove wall formed in the accommodating groove 1101. In one embodiment, the inner surface 110a includes a first surface 1102 formed on the main body 111 and a second surface 1103 formed on the side portion 112. In an embodiment, a rounded transition is used between the first surface 1102 and the second surface 1103. It is understood that in other embodiments, a right angle transition between the first surface 1102 and the second surface 1103 can be used.

In an embodiment, the substrate 110 may be provided with a structure of functional holes for assembling components for implementing specific functions, or for providing a detachable connection between peripheral components for implementing specific components and the mobile terminal, or for providing a channel for inputting and outputting signals such as sound. For example, fig. 4 shows, as an example, a first mounting hole 111c, a second mounting hole 112c, a third mounting hole 113c, a fourth mounting hole 114c, and a fifth mounting hole 115c formed in the side circumferential surface 110c, and a camera hole 116c formed through the inner surface 110a and the outer surface 110 b. The first mounting hole 111c may be used to mount a volume control key, so as to implement functions such as adjusting the volume playing size of the audio information of the mobile terminal 10. The second mounting hole 112c may be used to mount a SIM card. The third mounting hole 113c may be used to mount a power key. The fourth mounting hole 114c may be used for a passage for input and output of an external data line connector. The fifth mounting hole 115c may be used as a channel for input and output of an external earphone cable connector. The camera hole 116c may be used for passage of light for the camera of the mobile terminal 10. The specific positions where the first mounting hole 111c, the second mounting hole 112c, the third mounting hole 113c, the fourth mounting hole 114c, and the fifth mounting hole 115c are opened on the side circumferential surface 110c are not limited at all, and may be changed as needed.

In one embodiment, the substrate 110 may be formed by integrally injection molding a composite plate, an aluminum magnesium alloy, or other metal materials. In one embodiment, the material forming the injection molded part substrate 110 is toughened polycarbonate or a mixture of polycarbonate and acrylic. Specifically, the toughening polycarbonate is an Aunery PC-H2018HA, and the mixture of the polycarbonate and the acrylic is a Shuobede B2-4. Thus, the injection molded substrate 110 has good bending strength, scratch resistance, high hardness, high impact strength, high light transmittance, and other characteristics, and also has better glossiness and texture, and can improve the holding feeling and experience of the user. In one embodiment, the functional holes on the substrate 110 may be formed at the same time as the substrate 110 is integrally injection molded. Of course, in other embodiments, after the optical coating layer 120, the color layer 130, and the hardening layer 140 are formed on the base material 110 of the integrally formed plate-shaped structure to obtain a preform, the preform may be subjected to numerical control lathing (CNC machining) to form the functional hole structure on the obtained preform, so as to obtain a formed part, wherein specific operation steps, parameters, and the like of the numerical control lathing may be flexibly selected by those skilled in the art according to actual situations.

Referring to fig. 3 and 4, the optical coating layer 120 is disposed on the first surface 1102, and the thickness of the optical coating layer 120 may be 0.02mm to 0.05 mm. Thus, the texture of the main body 111 of the substrate 110, such as metal texture, plastic texture, ceramic texture or other material texture, can be changed by the reflected light of the optical coating layer 120, and the substrate 110 with a thinner thickness can generate a depth feeling by the light transmission effect. In one embodiment, the optical coating layer 120 may be a titanium oxide film, a silicon oxide film, or a combination thereof, so as to further improve the aesthetic feeling of the product appearance, and the titanium oxide film and the silicon oxide film have the characteristics of corrosion resistance and low cost, thereby increasing the service life of the product and reducing the production cost of the product. The optical coating layer 120 may be formed by a chemical vapor deposition or physical deposition method, such as vacuum evaporation, magnetron sputtering, or the like. Therefore, the chemical vapor deposition process or the physical deposition process is mature, the optical coating layer 120 with the required thickness can be accurately formed, the industrial production is easy, and the prepared optical coating layer 120 can provide better texture with a grating effect for the substrate 110.

The spraying color layer 130 is disposed on the second surface 1103, and the thickness of the spraying color layer 130 may be 0.02mm to 0.04 mm. Thus, the color of the side portion 112 of the substrate 110 can be changed by the reflected light of the spraying color layer 130, and the substrate 110 with a thinner thickness can generate a depth feeling by the light transmission effect thereof, and moreover, because the thickness of the spraying color layer 130 in the spraying process is convenient to control, the spraying color layer 130 is arranged on the side portion 112, so that the thickness of the spraying color layer of the side portion 112 can be close to and uniformly distributed, the problem of heterochrosis of the side portion 112 is avoided, the color presented after the side portion 112 transmits light can be kept consistent in depth, and the use requirement of the appearance effect of the battery cover 100 by a user is met. The material of the sprayed color layer 130 is not limited, as long as the substrate 110 can exhibit the color effect. In one embodiment, the material forming the sprayed color layer 130 includes, but is not limited to, paint or ink, and one skilled in the art can prepare the sprayed color layer 130 with a desired color by using different colored paint or ink to achieve the desired color rendering effect. In one embodiment, the sprayed color layer 120 may extend from the side edge portion 112 toward the main body portion 111 and cover a side of the optical coating layer 120 away from the main body portion 111. Thus, the color of the main body 111 of the substrate 110 can be changed by the reflected light of the main body 111.

The hardened layer 140 is provided on the outer surface 110b of the substrate 110. Therefore, the mechanical properties of the battery cover 100 can be greatly improved, so that the battery cover 100 has high strength, good wear resistance, scratch resistance, drop resistance and the like, and the battery cover 100 has good use effect. The material for forming the hardened layer 140 is not particularly limited as long as it can fulfill the requirement of enhancing mechanical properties. In one embodiment, the material forming the hardened layer 140 may be polycarbonate or a mixture of polycarbonate and acrylic, and specifically, may be mitsubishi 3410 or sapick 7515. Therefore, the material source is wide, the cost is low, the matching effect with the transparent injection molded base material 110 is better, and the effect of improving the mechanical property of the base material 110 is better. It should be noted that, when the mechanical properties of the substrate 110 can satisfy the basic use requirements, the hardened layer 140 disposed on the outer surface 110b of the substrate 110 may be omitted.

In another aspect of the present application, the present application also provides a method of manufacturing a battery cover 100 of the above-mentioned mobile terminal 10, referring to fig. 4 to 9, the method including the steps of:

step S210, as shown in fig. 4, provides the substrate 110. The base 110 includes a main body 111 and side portions 112 extending from edges of the main body 111, and the main body 111 and the side portions 112 form a housing groove 1101. The base member 110 includes an inner surface 110a, an outer surface 110b, and a side circumferential surface 110c connecting the inner surface 110a and the outer surface 110b, and the inner surface 110a includes a first surface 1102 formed on the main body portion 111 and a second surface 1103 formed on the side edge portion 112. In an embodiment, a rounded transition is used between the first surface 1102 and the second surface 1103. It is understood that in other embodiments, a right angle transition between the first surface 1102 and the second surface 1103 can be used. The substrate 110 may be made of a composite plate, an aluminum magnesium alloy, or the like, which are integrally injection molded.

In step S220, as shown in fig. 5 and 6, the optical coating layer 120 is formed on the first surface 1102. The optical coating layer 120 may be formed by a chemical vapor deposition or physical deposition method, such as vacuum evaporation, magnetron sputtering, or the like. Therefore, the chemical vapor deposition process or the physical deposition process is mature, the optical coating layer 120 with the required thickness can be accurately formed, the industrial production is easy, and the prepared optical coating layer 120 can provide better texture with a grating effect for the substrate 110.

In one embodiment, forming the optical coating layer 120 on the first surface 1102 includes the following steps:

step S221, providing a coating fixture 20. The coating fixture 20 includes a body 21 and a shielding member 22. The shielding member 22 may be connected to the body 21, and the shielding member 22 may be a shielding film attached to the second surface 1103. In one embodiment, the shield 22 is removably attached to the body 21. The main body 21 defines a receiving groove 21a, the receiving groove 21a includes a groove bottom 21b and a groove wall 21c connected to the groove bottom 21b, and the shielding member 22 is disposed in the receiving groove 21a adjacent to the groove wall 21c of the receiving groove 21a and opposite to the groove wall 21c of the receiving groove 21 a.

In step S222, the injection molded base 110 is placed in the receiving groove 21a, the main body 111 is attached to the groove bottom 21b of the receiving groove 21a, and the shield 22 covers the second surface 1103. In one embodiment, the side edge 112 is located between the groove wall 21c of the receiving groove 21a and the shutter 22.

In step S223, an optical coating process is performed on the first surface 1102. The formed optical coating layer 120 is located on the first surface 1102 and abuts against one side of the shielding member 22 exposed from the body 21, the shielding member 22 blocks the side portion 112 of the substrate 110, and the optical coating layer 120 is only formed on the main body portion 111 and is not formed on the side portion 112. Therefore, the problem of color difference of the side portion 112 caused by uneven thickness distribution of the optical coating layer 120 of the side portion 112 during the optical coating process can be avoided, that is, the side portion 112 has non-uniform color depth after being transmitted by light.

In step S230, as shown in fig. 7 and 8, the spraying color layer 130 is formed on the second surface 1103.

In one embodiment, forming the sprayed color layer 130 on the second surface 1103 includes the following steps:

in step S231a, a spraying jig 30 is provided, the spraying jig 30 is provided with an accommodating groove 31, and the accommodating groove 31 includes a groove bottom 31a and a groove wall 31b connected to the groove bottom 31 a.

In step S232a, the substrate 110 with the optical coating layer 120 formed thereon is transferred from the receiving groove 21a to the receiving groove 31, and the body 111 is attached to the bottom 31a of the receiving groove 31. In one embodiment, the side portions 112 are attached to the groove walls 31b of the accommodating groove 31.

In step S233a, the second surface 1103 is painted to form the painted color layer 130 on the second surface 1103. In one embodiment, as shown in fig. 9, the side of the optical coating layer 120 away from the main body 111 is sprayed, so that the sprayed color layer 130 covers the side of the optical coating layer 120 away from the main body 111.

It will be appreciated that in other embodiments, when the shutter 22 is removably attached to the body 21, the step of forming the sprayed color layer 130 on the second surface 1103 includes:

in step S231b, the shielding member 22 is detached such that the second surface 1103 is exposed to the body 21.

In step S232b, the second surface 1103 is painted to form the painted color layer 130 on the second surface 1103. Thus, the optical coating process of the first surface 1102 and the spraying process of the second surface 1103 can be completed by using one spraying jig 20, thereby saving the manufacturing cost. In one embodiment, as shown in fig. 9, the sprayed color layer 130 extends from the side edge portion 112 to the main body portion 111 and covers the side of the optical coating layer 120 away from the main body portion 111.

In step S240, referring to fig. 3, a hardened layer 140 is formed on the outer surface 110b, so as to obtain a preform. The hardened layer 140 may be obtained by subjecting the outer surface 110b of the substrate 110 to a surface hardening treatment, including but not limited to carburizing, nitriding, chrome plating, and the like.

When the functional hole is not formed in the substrate 110 by the integral injection molding, the method of manufacturing the battery cover 10 further includes the steps of, after the step of forming the hardened layer 140 on the outer surface 110 b:

and S250, performing numerical control lathe machining on the prefabricated member to form a functional hole on the prefabricated member, thereby obtaining a formed member.

In the present application, the optical coating layer 120 can provide a better color and metal texture for the substrate 110, the spraying color layer 130 can provide a colorful effect with uniform color for the substrate 110, and the hardened layer 140 can provide sufficient toughness and strength for the substrate 110. The optical coating layer 120 is only formed on the main body 111 and not formed on the side portion 112, so that the problem of color difference of the side portion 112 (i.e. the color shade of the side portion 112 is not uniform after the side portion 112 is transparent) caused by uneven thickness distribution of the optical coating layer 120 on the side portion 112 during the optical coating process can be avoided. Because the thickness of the sprayed color layer in the spraying process is convenient to control, the sprayed color layer 130 is arranged on the side edge part 112, so that the thickness of the sprayed color layer on the side edge part 112 can be approximately and uniformly distributed, the color presented after the side edge part 112 is transparent can be kept consistent, and the requirement of a user on the use of the appearance effect of the battery cover 10 is met.

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 battery cover, comprising:

the base material comprises a main body part and side parts extending from the edges of the main body part, wherein the main body part and the side parts form an accommodating groove; the side edge portion has light transmittance;

the optical coating layer is arranged on the first surface; and

and the spraying color layer is arranged on the second surface.

2. The battery cover of claim 1, wherein the sprayed color layer extends from the side edge portion toward the body portion and covers a side of the optical coating layer away from the body portion.

3. The battery cover of claim 1, wherein the battery cover includes a transparent hardened layer disposed on the outer surface.

4. The cell cover according to any of claims 1 to 3, wherein the thickness of said optical coating layer has a value of 0.02mm to 0.05 mm.

5. The battery cover according to any one of claims 1 to 3, wherein the thickness of the sprayed color layer has a value of 0.02mm to 0.04 mm.

6. A mobile terminal, comprising:

the battery cover of any of claims 1 to 5.

7. The preparation method of the battery cover is characterized by comprising the following steps of:

providing a base material, wherein the base material comprises a main body part and a side part extending from the edge of the main body part, the main body part and the side part form a containing groove, the base material comprises an inner surface, an outer surface and a side peripheral surface connecting the inner surface and the outer surface, and the inner surface comprises a first surface formed on the main body part and a second surface formed on the side part; the side edge portion has light transmittance; forming an optical coating layer on the first surface; and

and forming a spraying color layer on the second surface.

8. The method for preparing a battery cover according to claim 7, wherein the step of forming an optical coating layer on the first surface comprises the steps of:

and carrying out optical coating treatment on the first surface.

9. The method for manufacturing a battery cover according to claim 8, wherein the step of forming a sprayed color layer on the second surface comprises the steps of:

10. The method for manufacturing a battery cover according to claim 8, wherein the step of forming a sprayed color layer on the second surface comprises the steps of:

detaching the shielding piece to expose the second surface;

11. The method for manufacturing a battery cover according to claim 9 or 10, comprising, in the step of spraying the second surface, the steps of:

12. The method for manufacturing a battery cover according to claim 7, wherein the method for manufacturing a battery cover further comprises, after the step of forming a sprayed color layer on the second surface, the steps of:

and forming a transparent hardened layer on the outer surface to obtain the prefabricated member.

13. The method of manufacturing a battery cover according to claim 12, wherein the method of manufacturing a battery cover further comprises, after the step of forming a hardened layer on the outer surface, the steps of:

14. The method of manufacturing a battery cover according to claim 7, wherein the base material is manufactured by integral injection molding, and the base material is formed with a functional hole.