Patent Publication Number: US-2022238953-A1

Title: Battery cover and method for manufacturing the battery cover

Description:
CROSS-REFERENCE 
     The present application is a continuation of International Patent Application No. PCT/CN2020/107929, filed Aug. 7, 2020, which claims priority to Chinese Patent Application No. 201910828515.3, filed Sep. 3, 2019, the entire disclosures of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to the field of manufacture technologies of electronic devices, and in particular to a battery cover, and a method for manufacturing the battery cover. 
     BACKGROUND 
     With the development of technology, mobile phones are updated more and more rapidly. Consumers tend to pursue more creative, newer and more attractive mobile phone products with stronger appearance expressiveness. Most of the mobile phones on the market currently have a sandwich structure with a glass battery cover, an aluminum alloy frame and a glass screen cover combined together. There is a seam between the aluminum alloy frame and the glass battery cover, the seam affects a user&#39;s grip feeling and destroys a feeling of an integration of an entire housing of a mobile phone. However, the market is currently subject to various technical constraints, a glass housing with a stable a reliable mass production is usually made in a form of hot press molding to make a curved shape with a curved surface connected to a flat surface, and there is a trend of homogenization. 
     With a high temperature softening, when a glass in the mold is squeezed and an irregular surface of the mold will be imprinted to the glass, i.e. a mold mark. In a severe situation, the mold mark is difficult to remove, and a roughness of an inner surface of the glass is 1-10 um. Therefore, for prior hot press molding technologies, a molding temperature is normally limited to below a temperature of a softening point of a glass. With a glass of an integral structure, a height of the glass itself and a blocking of a middle frame, during polishing, a polishing brush is hard to get in contact with an inner corner connecting the middle frame and the battery cover. 
     In addition, in prior arts, a CNC processing is further required for a glass to shape the glass as needed. Such solution has following downsides: 1. long processing time: a processing period required by the CNC processing is 3-5 hours, which means higher costs; 2. the glass is easy to break during the process: during double-side CNC processing on the glass, the glass is easy to break due to a presence of micro-cracks in the processing process; 3. a cutter pattern is hard to remove in concave-surface CNC process, 2-3 hours of polishing time is required, and a long polishing period may cause other defects, such as a collapsed edge, etc. 
     SUMMARY OF THE DISCLOSURE 
     According to an embodiment of the present disclosure, a battery cover for an electronic device is provided, wherein the battery cover includes a body and a flange connected to the body, and a thickness of the flange is greater than a thickness of the body. 
     According to an embodiment of the present disclosure, a method for manufacturing the battery cover is provided, a manufacturing mold used in the method includes a first mold and a second mold, the first mold includes a groove, the second mold includes a bump, wherein the method includes: selecting a glass sheet; positioning the glass sheet at the first mold to define a sealing chamber with a wall of the groove; placing the second mold over and to cover the glass sheet, wherein the bump faces towards the groove, and the bump is in contact with the glass sheet; heating the first mold, the second mold, and the glass sheet; vacuumizing the sealing chamber to deform the glass sheet to a predetermined shape; deforming the glass sheet to the predetermined shape, wherein the deformed the glass sheet comprises a body and a flange connected to the body to define a battery chamber; cooling the first mold, the second mold, and the glass sheet; and processing the body to make a thickness of the body be less than a thickness of the flange. 
     According to an embodiment of the present disclosure, a method for manufacturing the battery cover of an electronic device is provided, includes: positioning a glass sheet at a first mold, wherein the first mold defines a groove, the glass sheet covers the groove and defines a sealing chamber with a wall of the sealing chamber; placing a second mold on the glass sheet, wherein the second mold comprises a bump, the bump is in contact with the glass sheet; wherein at least one of the first mold and the second mold is a heat absorption mold; heating the glass sheet, vacuumizing the sealing chamber, such that the glass sheet is deformed to a predetermined shape; cooling the first mold, the second mold and the glass sheet with a first cooling speed, and subsequently with a second cooling speed, wherein the first cooling speed is less than the second cooling speed; and processing the body to make a thickness of the body be less than a thickness of the flange. 
     The further aspects and advantages of the present disclosure will be given in the following description, some aspects will become clear from the following description, or will be understood through an implementation of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above described and/or further aspects of the present disclosure will become clear and easy to understand by referring to the accompanying drawings of the embodiments. 
         FIG. 1  is a structural schematic diagram of an electronic device according to an embodiment of the present disclosure. 
         FIG. 2  is a structural schematic diagram of a manufacturing mold according to an embodiment of the present disclosure, showing a glass sheet is not deformed. 
         FIG. 3  is a structural schematic diagram of a manufacturing mold according to an embodiment of the present disclosure, showing the glass sheet is deformed. 
         FIG. 4  is an explosive diagram of a manufacturing mold according to an embodiment of the present disclosure, showing the glass sheet is deformed. 
         FIG. 5  is a structural schematic diagram of a battery cover of an electronic device according to an embodiment of the present disclosure. 
         FIG. 6  is a structural schematic diagram of a part of the glass sheet of the electronic device according to an embodiment of the present disclosure, showing a texture of the glass sheet is not trimmed. 
         FIG. 7  is a structural schematic diagram of a part of a glass sheet of an electronic device according to an embodiment of the present disclosure, showing the texture of the glass sheet is trimmed. 
         FIG. 8  is a flow chart of a method for manufacturing a battery cover according to an embodiment of the present disclosure. 
         FIG. 9  is a flow chart of a method for manufacturing a battery cover according to another embodiment of the present disclosure. 
         FIG. 10  is a flow chart of a method for manufacturing a battery cover according to another embodiment of the present disclosure. 
         FIG. 11  is a flow chart of a method for manufacturing a battery cover according to another embodiment of the present disclosure. 
     
    
    
     Numerals of accompanying drawings: electronic device  100 , battery cover  110 , body  111 , flange  112 , corner  113 , manufacturing mold  200 , sealing chamber  201 , first mold  210 , groove  211 , second mold  220 , bump  221 , glass sheet  300 , texture  301 . 
     DETAILED DESCRIPTION 
     Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. From beginning to end, the same or similar numerals indicate the same or similar components or components having the same or similar functions. The embodiments described below by reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and not to be construed as limiting the present disclosure. 
     A battery cover for an electronic device, includes a body and a flange connected to the body, and a thickness of the flange is greater than a thickness of the body. 
     In some embodiments, the body is integrated with the flange, and defines a battery chamber with the flange. 
     In some embodiments, a rounded corner is formed between the body and the flange, and a corner radius between the body and the flange is 0.5-3 mm. 
     In some embodiments, the thickness of the body is 0.5-0.8 mm, and the thickness of the flange is 1.0-1.5 mm. 
     In some embodiments, an inner surface of the body includes a coating layer or a spray layer. 
     In some embodiments, the flange is a middle frame of the electronic device. 
     In some embodiments, a material of the battery cover is at least one of glass, plastic, and composite. 
     A method for manufacturing a battery cover of an electronic device, a manufacturing mold used in the method includes a first mold and a second mold, the first mold includes a groove, the second mold includes a bump, and the method includes: selecting a glass sheet; positioning the glass sheet at the first mold to define a sealing chamber with a wall of the groove; placing the second mold over and to cover the glass sheet, wherein the bump faces towards the groove, and the bump is in contact with the glass sheet; heating the first mold, the second mold, and the glass sheet; vacuumizing the sealing chamber to deform the glass sheet to a predetermined shape; deforming the glass sheet to the predetermined shape, wherein the deformed glass sheet comprises a body and a flange connected to the body to define a battery chamber; cooling the first mold, the second mold, and the glass sheet; and processing the body to make a thickness of the body be less than a thickness of the flange. 
     In some embodiments, in the heating the first mold, the second mold, and the glass sheet, a heating temperature is 800° C.-850° C. 
     In some embodiments, in the vacuumizing the sealing chamber, a time for vacuumizing is 60-90s. 
     In some embodiments, a vacuum degree in the sealing chamber is 0.1-1×10-8 MPa after the sealing chamber is vacuumized. 
     In some embodiments, at least one of the first mold and the second mold is a heat absorption mold. 
     In some embodiments, in the cooling the first mold, the second mold, and the glass sheet, the first mold, the second mold and the glass sheet experience slow cooling phase and then fast cooling phase. 
     In some embodiments, a corner exists between the body and the flange. 
     In some embodiments, the corner is a rounded corner, and a corner radius of the rounded corner is 0.5-3 mm. 
     In some embodiments, in the processing the body to make a thickness of the body be less than a thickness of the flange, a thickness of the body is 0.5-0.8 mm. 
     In some embodiments, a texture exists in an outer surface of the bump and an inner surface of the groove, in the vacuumizing the sealing chamber, the texture is formed on surfaces of the glass sheet in contact with the outer surface of the bump and the inner surface of the groove; the method further includes: trimming the texture after cooling the first mold, the second mold and the glass sheet. 
     In some embodiments, after the cooling the first mold, the second mold, and the glass sheet, the glass sheet is grinded, polished, chemically strengthened, coated, printed with graphic information, and sprayed with ink. 
     In some embodiments, in the heating the first mold, the second mold, and the glass sheet, the first mold or the second mold is heated by non-contact heating. 
     A method for manufacturing a battery cover of an electronic device, includes: positioning a glass sheet at a first mold, wherein the first mold defines a groove, the glass sheet covers the groove and defines a sealing chamber with a wall of the sealing chamber; placing a second mold on the glass sheet; wherein the second mold comprises a bump, the bump is in contact with the glass sheet; wherein at least one of the first mold and the second mold is a heat absorption mold; heating the glass sheet, vacuumizing the sealing chamber, such that the glass sheet is deformed to a predetermined shape; cooling the first mold, the second mold and the glass sheet with a first cooling speed, and subsequently with a second cooling speed, wherein the first cooling speed is less than the second cooling speed; and processing the body to make a thickness of the body be less than a thickness of the flange. 
     An electronic device including a battery cover is provided. The battery cover is manufactured by the method as described above. 
     A battery cover  110  according to an embodiment of the present disclosure is described in detail by referring to  FIG. 5 . It should be noted that, the battery cover  110  is applied to an electronic device  100  (as shown in  FIG. 1 ). The electronic device  100  may be a mobile phone, a pad, a lap top computer, or a wearable device. Specifically, the battery cover  110  of the electronic device  100  defines a battery chamber configured to accommodate components like batteries or circuit boards. 
     As shown in  FIG. 1  and  FIG. 5 , the battery cover  110  according to an embodiment of the present disclosure is applied for the electronic device  100 . The battery cover  110  includes a body  111  and a flange  112 , the flange  112  is connected to the body  111 . A thickness of the flange  112  is greater than a thickness of the body  111 . The body and the flange are made of a single piece. 
     The battery cover  110  according to an embodiment of the present disclosure includes the body  111  and the flange  112 , and the thickness of the flange  112  is greater than the thickness of the body  111 , on the one hand, the flange  112  with a greater thickness could improve a strength of the structure of the battery cover  110 ; on the other hand, the body being thinner could reduce an overall weight of the battery cover  110 . 
     To simplify a process of the battery cover  110 , the body  111  and the flange  112  are integrally formed. A material of the battery cover  110  is at least one of glass, plastic, and composite. The flange  112  is a middle frame of the electronic device  100 . 
     A corner is formed in a joint of the body  111  and the flange  112 . The corner may be a rounded corner. A shown in  FIG. 5 , a corner radius between the body  111  and the flange  112  may be 0.5-3 mm. Therefore, a stress concentration between the body  111  and the flange  112  may be reduced, and a fatigue resistance of the battery cover  110  could be improved. Furthermore, the thickness of body  111  may be 0.5-0.8 mm and the thickness of the flange  112  may be 1.0-1.5 mm. To further improve a structural strength of the battery cover  110 , an inner surface of the body  111  includes a coating layer or a spray layer. 
     A method for manufacturing the battery cover  110  of the electronic device  100  and the electronic device  100  according to an embodiment of the present disclosure is described below by referring to  FIGS. 1 to 9 . It should be noted that, the electronic device  100  may be a mobile phone, a pad, a lap top computer, or a wearable device. Specifically, the battery cover  110  of the electronic device  100  defines a battery chamber configured to accommodate components like batteries or circuit boards. 
     When manufacturing and processing the battery cover  110 , a manufacturing mold  200  is used. The manufacturing mold  200  includes a first mold  210  and a second mold  220 . The first mold  210  defines a groove  211  and the second mold  220  includes a bump  221 . It should be noted that, the first mold  210  may perform clamping with the second mold  220 . When the first mold  210  and the second mold  220  are clamped, the bump  221  may be received inside the groove  211 , and the bump  221  and a wall of the groove  211  define a space configured to receive a glass sheet  300 , which is configured to form the battery cover  110 . 
     It should be noted that, a porosity of at least one of the first mold  210  and the second mold  220  may be 12%-18%. In order to facilitate heat absorption of the first mold  210  and the second mold  220 , at least one of the first mold  210  and the second mold  220  is a heat absorption mold. Understandably, at least one of the first mold  210  and the second mold  220  may be made of heat absorption materials. 
     As shown in  FIG. 8 , the method for manufacturing the battery cover  110  of the electronic device according to an embodiment of the present disclosure includes the following operations. 
     A glass sheet  300  is selected (as shown in block  81  in  FIG. 8 ). 
     As shown in  FIG. 2  and block  82  in  FIG. 8 , the glass sheet  300  is placed over and covers the first mold  210 , the glass sheet  300  and the wall of the groove  211  define a sealing chamber  201 . 
     As shown in block  83  in  FIG. 8 , the second mold  220  is placed over and covers the glass sheet  300 , the bump  221  faces towards the groove  211 , and the bump  221  is in contact with the glass sheet  300 . At this point, the glass sheet  300  is positioned between the first mold  210  and the second mold  220 . 
     As shown in block  84  in  FIG. 8 , the first mold  210 , the second mold  220 , and the glass sheet  300  are heated. Since the glass sheet  300  has a characteristic of softening when being heated, during the heating process, the glass sheet  300  gradually deforms and attaches towards an inner surface of the groove  211 . Since the bump  221  of the second mold  220  is abutted against the glass sheet  300 , the manufacturing mold  200  may accelerate a deformation of the glass sheet  300 . 
     As shown in block  85  in  FIG. 8 , to further accelerate the deformation of the glass sheet  300 , the sealing chamber  201  is vacuumized. With a decrease of air pressure inside the sealing chamber  201 , the glass sheet  300  is further deformed. The bump  221  is gradually moved into the groove  211 . 
     As shown in block  86  in  FIG. 8 , the glass sheet  300  is deformed to a predetermined shape. At this point, the bump  221  and the groove  211  define a space configured to receive the glass sheet  300 . An outer surface of the bump  221  is attached against one side surface of the glass sheet  300 , and the inner surface of the groove  211  is attached against another side surface of the glass sheet  300 . Therefore, the glass sheet  300  is processed to become the battery cover  110 . 
     The method for manufacturing the battery cover  110  of the electronic device according to an embodiment of the present disclosure, by using the characteristic of a glass softens when being heated, the glass sheet  300  is processed, by heating and vacuumizing processes, to be in a predetermined shape, thereby simplifying the process of the battery cover  110 , improving a quality rate, reducing a production cycle, and saving production costs. 
     As shown in  FIG. 9 , to facilitate explaining operations of the method for manufacturing the battery cover  110 , each operation is numbered. It should be noted that, the numbers are not to limit an order of the manufacturing method. The method for manufacturing the battery cover  110  of an electronic device according to an embodiment of the present disclosure includes the following operations. 
     First operation (as shown in block  91  in  FIG. 9 ): the glass sheet  300  is selected. A thickness of the glass sheet  300  may be 1.0-1.5 mm and a temperature of a softening point of the glass sheet  300  may be 700° C.-850° C. 
     Second operation (as shown in block  92  in  FIG. 9 ): the glass sheet  300  is placed over and covers the first mold  210 . The glass sheet  300  and a wall of the groove  211  define the sealing chamber  201 . 
     Third operation (as shown in block  93  in  FIG. 9 ): the second mold  220  is placed over and covers the glass sheet  300 . The bump  221  faces towards the groove  211  and the bump  221  is in contact with the glass sheet  300 . At this point, the glass sheet  300  is positioned between the first mold  210  and the second mold  220 . 
     Fourth operation (as shown in block  94  in  FIG. 9 ): the first mold  210 , the second mold  220 , and the glass sheet  300  are heated, and a heating temperature is 800° C.-850° C. Since the glass sheet  300  has a characteristic of softening when being heated, during the heating process, the glass sheet  300  gradually deforms and attaches towards an inner surface of the groove  211 . Since the bump  221  of the second mold  220  is abutted against the glass sheet  300 , the manufacturing mold  200  may accelerate the deformation of the glass sheet  300 . To facilitate a flow of work and improve a heating efficiency, the first mold  210 , the second mold  220 , and the glass sheet  300  overall move three to four stations. 
     It should be noted that, when the first mold  210 , the second mold  220 , and the glass sheet  300  are heated, a non-contact heating method is adopted. The “non-contact heating method” herein may be understood as a heat source is not in direct contact with the glass sheet  300 , which is also called as thermo-vacuum-forming; i.e. the first mold  210  or the second mold  220  is heated by heat absorption, and the heat is transferred to the glass sheet  300  or the corresponding second mold  220  or first mold  210  by heat transfer. For example, when the first mold  210  is heated by the non-contact heating method, heat is transferred to the glass sheet  300  and the second mold  220  through the first mold  210 . 
     Since an outer surface of a glass is vacuum-formed, mold marks are mainly on an outer surface of a product. A roughness of an inner surface of the formed glass is 0.1-1 um, and a mirror effect on the inner surface may be acquired by only lightly polishing. Therefore, a problem of an inner corner in a bending of the glass having mold marks in prior technology of hot press forming is solved. Since the glass is preprocessed to be a needed shape, only a CNC processing on a surface of the glass is required, as a result, a processing time could be reduced and the glass is not fragile, and a cutter texture on the surface of the glass is easy to remove. 
     Fifth operation (as shown in block  95  in  FIG. 9 ): as shown in  FIG. 3 , to further accelerate the deformation of the glass sheet  300 , the sealing chamber  201  is vacuumized. The vacuumizing time may be 60-90s and the vacuum degree is 0.1-1×10 −8  MPa. With a decrease of the air pressure in the sealing chamber  201 , the glass sheet  300  is further deformed and the bump  221  is gradually moved to the groove  211 . To facilitate a flow of work and improve a heating efficiency, the first mold  210 , the second mold  220 , and the glass sheet  300  overall move two to three stations. 
     Sixth operation (as shown in block  96  in  FIG. 9 ): as shown in  FIG. 3 , the glass sheet  300  is deformed to a predetermined shape. At this point, the bump  221  and the wall of the groove  211  define a space configured to receive the glass sheet  300 . An outer surface of the bump  221  is attached against one side surface of the glass sheet  300  and an inner surface of the groove  211  is attached against another side surface of the glass sheet  300 . Therefore, the glass sheet  300  is processed to become the battery cover  110 . 
     Seventh operation (as shown in block  97  in  FIG. 9 ): the first mold  210 , the second mold  220 , and the glass sheet  300  are cooled. During the cooling process, the first mold  210 , the second mold  220  and the glass sheet  300  overall may first experience a slow cooling phase, and then a fast cooling phase. It should be noted that, during the cooling process, a cooling speed of an overall structure formed by the first mold  210 , the second mold  220 , and the glass sheet  300  in fast cooling phase is V 1  (i.e. a value of temperature decrease in a unit time), a cooling speed of the overall structure formed by the first mold  210 , the second mold  220 , and the glass sheet  300  in slow cooling phase is V 2  (i.e. a value of temperature decrease in a unit time), the V 1 &gt;V 2 . 
     Furthermore, in the fast cooling phase, the first mold  210 , the second mold  220 , and the glass sheet  300  overall move one to two stations. A deformed glass is taken out from the first mold. Since the second mold  220  is not pressurized during the forming process, the mold marks caused by pressing of the first mold  210  and the second mold  220  during the forming process may be relatively light. Therefore, a problem of serious mold marks being difficult to polish and remove during a hot press forming process due to an excessive temperature of a glass is solved. 
     Eighth operation (as shown in block  99  in  FIG. 9 ): the glass sheet  300  is grinded, polished, and chemically strengthened. 
     Ninth operation (as shown in block  911  in  FIG. 9 ): the glass sheet  300  is coated. 
     Tenth operation (as shown in block  910  in  FIG. 9 ): graphic information is printed to the glass sheet  300 . 
     Eleventh operation (as shown in block  912  in  FIG. 9 ): the glass sheet  300  is sprayed with ink. At this point, the glass sheet  300  is processed to become the battery cover  110 . 
     In addition, to fulfill a requirement of a texture  301  of the battery cover  110 , the texture  301  may be processed on the glass sheet  300  by at least one of the first mold  210  and the second mold  220 . For example, the outer surface of the bump  221  and the inner surface of the groove  211  includes the texture  301 . When the sealing chamber  201  is vacuumized, the texture  301  is formed on surfaces of the glass sheet  300  attached against the outer surface of the bump  221  and the inner surface of the groove  211 . Since the glass sheet  300  is being heated at this point, it has a certain liquidity. The texture  301  of the bump  221  and the inner surface of the groove  211  may be printed to the surfaces of the glass sheet  300 . Thus, while a heat forming process is performed on the glass sheet  300 , the texture  301  is formed; thereby not only omitting a processing operation of processing texture  301 , but also avoiding a damage of the glass sheet  300  caused by a process of turning the texture  301 ; and improving a process efficiency and a quality rate. 
     To enhance an effect of the texture  301 , after the first mold  210 , the second mold  220 , and the glass sheet  300  are cooled, the texture  301  may be trimmed, and thereby enhancing the aesthetic appearance of the texture  301 . Furthermore, as shown in block  98  in  FIG. 9 , when the texture  301  is trimmed, a thickness of a trimmed glass may be 0.01-0.02 mm greater than a depth of the texture  301 . As shown in  FIG. 6 , at this point, the texture  301  of the glass sheet  300  is not trimmed. As shown in  FIG. 7 , at this point, the texture  301  of the glass sheet  300  is trimmed. 
     The electronic device  100  according to an embodiment of the present disclosure includes a battery cover  110 . The battery cover  110  may be manufactured according to the above described manufacturing method. 
     The electronic device  100  according to an embodiment of the present disclosure, by using the characteristic of a glass softens when heated, the glass sheet is processed, by heating and vacuumizing processes, to be in a predetermined shape, thereby simplifying the process of the battery cover  110 , improving a quality rate, reducing a production cycle of the electronic device  100 , and saving production costs of the electronic device  100 . 
     A method for manufacturing the battery cover  110  of the electronic device and the electronic device  100  according to an embodiment of the present disclosure is described below by referring to  FIGS. 1 to 10 . It should be noted that, the electronic device  100  may be a mobile phone, a pad, a lap top computer, or a wearable device. Specifically, the battery cover  110  of the electronic device defines a battery chamber which is configured to place components like batteries or circuit boards. 
     When processing and manufacturing the battery cover  110 , a manufacturing mold  200  is used. The manufacturing mold  200  includes a first mold  210  and a second mold  220 . The first mold  210  defines a groove  211  and the second mold  220  includes a bump  221 . It should be noted that, the first mold  210  may perform clamping with the second mold  220 . When the first mold  210  and the second mold  220  are clamped, the bump  221  may be received inside the groove  211 , and the bump  221  and a wall of the groove  211  define a space configured to receive a glass sheet  300 , which is configured to form the battery cover  110 . 
     It should be noted that, a porosity of at least one of the first mold  210  and the second mold  220  may be 12%-18%. In order to facilitate heat absorption of the first mold  210  and the second mold  220 , at least one of the first mold  210  and the second mold  220  is a heat absorption mold. Understandably, at least one of the first mold  210  and the second mold  220  may be made of heat absorption materials. 
     As shown in  FIG. 9 , the method for manufacturing the battery cover  110  of the electronic device according to an embodiment of the present disclosure includes the following operations. 
     A glass sheet  300  is selected (as shown in block  91  in  FIG. 9 ). 
     As shown in block  92  in  FIG. 9 , the glass sheet  300  is placed over and covers the first mold  210 , the glass sheet  300  and the wall of the groove  211  define a sealing chamber  201 . 
     As shown in block  93  in  FIG. 9 , the second mold  220  is placed over and covers the glass sheet  300 , the bump  221  faces towards the groove  211 , and the bump  221  is in contact with the glass sheet  300 . At this point, the glass sheet  300  is positioned between the first mold  210  and the second mold  220 . 
     As shown in block  94  in  FIG. 9 , the first mold  210 , the second mold  220 , and the glass sheet  300  are heated. Since the glass sheet  300  has a characteristic of softening when being heated, during the heating process, the glass sheet  300  gradually deforms and attaches towards an inner surface of the groove  211 . Since the bump  221  of the second mold  220  is abutted against the glass sheet  300 , the manufacturing mold  200  may accelerate a deformation of the glass sheet  300 . 
     As shown in block  95  in  FIG. 9 , to further accelerate the deformation of the glass sheet  300 , a sealing chamber  201  is vacuumized. With a decrease of air pressure inside the sealing chamber  201 , the glass sheet  300  is further deformed. The bump  221  is gradually moved into the groove  211 . 
     As shown in block  96  in  FIG. 9 , the glass sheet  300  is deformed to a predetermined shape. The glass sheet  300  includes a body  111  and a flange  112 , and the flange  112  is connected to the body  111  to define a battery chamber. At this point, the battery chamber may be configured to accommodate a battery or a circuit board, the bump  221  and a wall of the groove  211  define a space configured to receive the glass sheet  300 . An outer surface of the bump  221  is attached against one side surface of the glass sheet  300 , and an inner surface of the groove  211  is attached against another side surface of the glass sheet  300 . 
     As shown in block  97  in  FIG. 9 , the first mold  210 , the second mold  220 , and the glass sheet  300  are cooled. 
     A body  111  is processed to make a thickness of the body  111  be less than a thickness of the flange  112 . The battery cover  110  acquired from such process has different thicknesses, thereby fulfilling a usage need of an electronic device. 
     The method for manufacturing the battery cover  110  of the electronic device according to an embodiment of the present disclosure, by using the characteristic of a glass softens when being heated, the glass sheet is processed, by heating and vacuumizing processes, to be in a predetermined shape. The battery cover  110  my have different thicknesses through further processing. Thus, the process of the battery cover  110  is simplified, different usage needs is fulfilled, a quality rate is improved, a production cycle reduced, and production costs are saved. 
     As shown in  FIG. 10 , to facilitate explaining operations of the method for manufacturing the battery cover  110 , each operation is numbered. It should be noted that, the numbers are not to limit an order of the manufacturing method. The method for manufacturing the battery cover  110  of the electronic device according to an embodiment of the present disclosure includes the following. 
     First operation (as shown in block  101  in  FIG. 10 ): the glass sheet  300  is selected. A thickness of the glass sheet  300  may be 1.0-1.5 mm and a temperature of a softening point of the glass sheet  300  may be 700° C.-850° C. 
     Second operation (as shown in block  102  in  FIG. 10 ): the glass sheet  300  is placed over and covers the first mold  210 . The glass sheet  300  and the wall of the groove  211  define a sealing chamber  201 . 
     Third operation (as shown in block  103  in  FIG. 10 ): the second mold  220  is placed over and covers the glass sheet  300 . The bump  221  faces towards the groove  211  and the bump  221  is in contact with the glass sheet  300 . At this point, the glass sheet  300  is positioned between the first mold  210  and the second mold  220 . 
     Fourth operation (as shown in block  104  in  FIG. 10 ): the first mold  210 , the second mold  220 , and the glass sheet  300  are heated, and a heating temperature is 800° C.-850° C. Since the glass sheet  300  has a characteristic of softening when being heated, during the heating process, the glass sheet  300  gradually deforms and attaches towards an inner surface of the groove  211 . Since the bump  221  of the second mold  220  is abutted against the glass sheet  300 , the manufacturing mold  200  may accelerate the deformation of the glass sheet  300 . To facilitate a flow of work and improve a heating efficiency, the first mold  210 , the second mold  220 , and the glass sheet  300  overall move three to four stations. 
     It should be noted that, when the first mold  210 , the second mold  220 , and the glass sheet  300  are heated, a non-contact heating method is adopted. The “non-contact heating method” herein may be understood as a heat source is not in direct contact with the glass sheet  300 ; i.e. the first mold  210  or the second mold  220  is heated by heat absorption and the heat is transferred to the glass sheet  300  or the corresponding second mold  220  or first mold  210  by heat transfer. For example, when the first mold  210  is heated by the non-contact heating method, heat is transferred to the glass sheet  300  and the  210  through the  220 . 
     Since an outer surface of a glass is vacuum-formed, mold marks are mainly on an outer surface of a product. A roughness of an inner surface of the formed glass is 0.1-1 um and a mirror effect on the inner surface may be acquired by only lightly polishing. Therefore, a problem of an inner corner in a bending of the glass having mold marks in prior technology of hot press forming is solved. Since the glass is preprocessed to be a needed shape only a CNC processing on a surface of the glass is required, a processing time could be reduced and the glass is not fragile, and a cutter texture on the surface of the glass is easy to remove. 
     Fifth operation (as shown in block  105  in  FIG. 10 ): to further accelerate a deformation of the glass sheet  300 , the sealing chamber  201  is vacuumized. The vacuumizing time may be 60-90s and the vacuum degree is 0.1-1×10 −8  MPa. With a decrease of the air pressure in the sealing chamber  201 , the glass sheet  300  is further deformed and the bump  221  is gradually moved to the groove  211 . To facilitate a flow of work and improve a heating efficiency, the first mold  210 , the second mold  220 , and the glass sheet  300  overall move two to three stations. 
     Sixth operation (as shown in block  106  in  FIG. 10 ): the glass sheet  300  is deformed to a predetermined shape. The glass sheet  300  includes a body  111  and a flange  112 . The flange  112  is connected to the body  111  to define a battery chamber. At this point, the battery chamber may be configured to accommodate a battery or a circuit board. The bump  221  and the wall of the groove  211  define a space configured to receive the glass sheet  300 . An outer surface of the bump  221  is attached against one side surface of the glass sheet  300  and an inner surface of the groove  211  is attached against another side surface of the glass sheet  300 . Thus, the glass sheet  300  is processed to become the battery cover  110 . To enhance an aesthetic appearance of the battery cover  110 , a rounded corner  113  exists between the body  111  and the flange  112 . The corner radius of the rounded corner is 0.5-3 mm. 
     Since a liquidity of the glass is not enough in a low temperature, and a hot press forming only pressurize a part of the glass, it is difficult to fit the glass into a shape of a mold. Thus, it is hard for the hot press forming to form a curved surface of a rounded corner with a corner radius less than 3 mm. By using heat absorption to form the glass sheet, a corner radius may be reduced. 
     Seventh operation (as shown in block  107  in  FIG. 10 ): the first mold  210 , the second mold  220 , and the glass sheet  300  are cooled. During the cooling process, the first mold  210 , the second mold  220  and the glass sheet  300  overall may first experience a slow cooling phase, and then a fast cooling phase. It should be noted that, during the cooling process, a cooling speed of an overall structure formed by the first mold  210 , the second mold  220 , and the glass sheet  300  in fast cooling phase is V 1  (i.e. a value of temperature decrease in a unit time), a cooling speed of the overall structure formed by the first mold  210 , the second mold  220 , and the glass sheet  300  in slow cooling phase is V 2  (i.e. a value of temperature decrease in a unit time), the V 1 &gt;V 2 . 
     Furthermore, in the fast cooling phase, the first mold  210 , the second mold  220 , and the glass sheet  300  overall move one to two stations. A deformed glass is taken out from the first mold. Since the second mold  220  is not pressurized during the forming process, the mold marks caused by pressing of the first mold  210  and the second mold  220  during the forming process may be relatively light. Therefore, a problem of serious mold marks being difficult to polish and remove during a hot press forming process due to an excessive temperature of a glass is solved. 
     Eighth operation (as shown in block  108  in  FIG. 10 ): the body  111  is processed to make a thickness of the body  111  be less than a thickness of the flange  112 , the thickness of body  111  may be 0.5-0.8 mm. 
     Ninth operation (as shown in block  109  in  FIG. 10 ): the glass sheet  300  is grinded, polished, and chemically strengthened. 
     Tenth operation (as shown in block  1010  in  FIG. 10 ): the glass sheet  300  is coated. 
     Eleventh operation (as shown in block  1011  in  FIG. 10 ): graphic information is printed to the glass sheet  300 . 
     Twelfth operation (as shown in block  1012  in  FIG. 10 ): the glass sheet  300  is sprayed with ink. At this point, the glass sheet  300  is processed to become the battery cover  110 . The battery cover  110  acquired from such process has different thicknesses, thereby fulfilling a usage need of an electronic device. 
     In addition, to fulfill a requirement of a texture  301  of the battery cover  110 , the texture  301  may be processed on the glass sheet  300  by at least one of the first mold  210  and the second mold  220 . For example, the outer surface of the bump  221  and the inner surface of the groove  211  includes the texture  301 . When the sealing chamber  201  is vacuumized, the texture  301  is formed on surfaces of the glass sheet  300  attached against the outer surface of the bump  221  and the inner surface of the groove  211 . Since the glass sheet  300  is being heated at this point, it has a certain liquidity. The texture  301  of the bump  221  and the inner surface of the groove  211  may be printed to the surfaces of the glass sheet  300 . Thus, while a heat forming process is performed on the glass sheet  300 , the texture  301  is formed; thereby not only omitting a processing operation of processing texture  301 , but also avoiding a damage of the glass sheet  300  caused by a process of turning the texture  301 ; and improving a process efficiency and a quality rate. 
     To enhance an effect of the texture  301 , after the first mold  210 , the second mold  220 , and the glass sheet  300  are cooled, the texture  301  may be trimmed, and thereby enhancing the aesthetic appearance of the texture  301 . Furthermore, when the texture  301  is trimmed, a thickness of a trimmed glass may be 0.01-0.02 mm greater than a depth of the texture  301 . As shown in  FIG. 6 , at this point, the texture  301  of the glass sheet  300  is not trimmed. As shown in  FIG. 7 , at this point, the texture  301  of the glass sheet  300  is trimmed. 
     The electronic device  100  according to an embodiment of the present disclosure includes a battery cover  110 . The battery cover  110  may be manufactured according to the above described manufacturing method. 
     The electronic device  100  according to an embodiment of the present disclosure, by using the characteristic of a glass softens when being heated, the glass sheet is processed, by heating and vacuumizing processes to be in a predetermined shape, thereby, simplifying the process of the battery cover  110 , improving a quality rate, reducing a production cycle of the electronic device  100 , and saving production costs of the electronic device  100 . 
     As shown in  FIG. 11 , to facilitate explaining operations of the method for manufacturing the battery cover  110 , each operation is numbered. It should be noted that, the numbers are not to limit an order of the manufacturing method. The method for manufacturing the battery cover  110  of the electronic device according to an embodiment of the present disclosure includes the following. 
     First operation (as shown in block  1101  in  FIG. 11 ): a glass is positioned at a first mold, and the first model defines a groove, the glass sheet covers the groove and defines a sealing chamber with a wall of the sealing chamber. 
     Second operation (as shown in block  1102  in  FIG. 11 ): a second mold is placed on the glass sheet, and the second mold includes a bump, the bump is in contact with the glass sheet, wherein at least one of the first mold and the second mold is a heat absorption mold. 
     Third operation (as shown in block  1103  in  FIG. 11 ): the glass sheet is heated, the sealing chamber is vacuumized, such that the glass sheet is deformed to a predetermined shape. 
     Fourth operation (as shown in block  1104  in  FIG. 11 ): the first mold, the second mold, and the glass sheet are cooled with a first cooling speed, and subsequently with a second cooling speed, and the first cooling speed is less than the second cooling speed. 
     Fifth operation (as shown in block  1105  in  FIG. 11 ): the body is processed to make a thickness of the body be less than a thickness of the flange. 
     In the descriptions of the present specification, terminologies like “one embodiment”, “some embodiments”, “an exemplary embodiment”, “an example”, “specific example”, or “some examples” means that specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In the present specification, a schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics may be combined in any one or more embodiments or examples in a suitable manner. 
     Although embodiments of the present disclosure have been shown and described, one skilled in the art may understand that without departing from the principles and purposes of the present disclosure, a variety of variations, modifications, replacements and variants of embodiments may be made; the scope of the present disclosure is defined by the claims and their equivalents.