Battery compartment and preparation method thereof, middle frame and electronic equipment

Abstract

The invention provides a battery compartment and a preparation method thereof, a middle frame and electronic equipment. The battery compartment provided by the embodiment of the invention comprises a supporting part; the connecting part is connected with the supporting part and arranged around the periphery of the supporting part, the elastic modulus of the supporting part is larger than that of the connecting part, and the ductility of the supporting part is smaller than that of the connecting part. The supporting part of the battery compartment provided by the embodiment of the invention has relatively high mechanical strength and can be thinner, and the connecting part has relatively good machining performance.

Description

Technical Field

[0001] The present application relates to the field of electronics, and in particular to a battery compartment and a preparation method thereof, a middle frame and an electronic device. Background Art

[0002] As electronic devices (such as mobile phones, tablets, etc.) continue to pursue thinness and large battery capacity, better requirements are put forward for battery compartments. The battery compartments are required to be thinner while ensuring strength to provide more space for the battery. In addition, the battery compartments are required to have good mechanical processing performance and can be processed into complex structures. However, it is difficult for the battery compartments of electronic devices in the related art to take into account both performances. Summary of the invention

[0003] The embodiment of the present application provides a battery compartment, the support portion of which has high mechanical strength and can be made thinner, and the connection portion has good mechanical processing performance.

[0004] A first aspect of the present application provides a battery compartment, the battery compartment comprising:

[0005] a support portion; and

[0006] A connecting portion is connected to the supporting portion and is arranged around the outer circumference of the supporting portion, the elastic modulus of the supporting portion is greater than the elastic modulus of the connecting portion, and the elongation of the supporting portion is less than the elongation of the connecting portion.

[0007] A second aspect of the present application provides a method for preparing a battery compartment, the method comprising:

[0008] Providing a first metal material, a second metal material and a first reinforcing material;

[0009] Laying a first metal material, a second metal material and a first reinforcing material to form a stacked body, wherein the stacked body includes a first portion and a second portion, wherein the second portion surrounds the periphery of the first portion, the first portion includes the first metal material and the first reinforcing material, and the second portion includes the second metal material; and

[0010] The stacked body is hot-pressed to form the first part so that the first part forms a supporting part and the second part forms a connecting part, thereby obtaining a battery compartment, wherein the battery compartment includes a supporting part and a connecting part, the connecting part is connected to the supporting part and is arranged around the periphery of the supporting part, the elastic modulus of the supporting part is greater than the elastic modulus of the connecting part, and the elongation of the supporting part is less than the elongation of the connecting part.

[0011] A third aspect of the present application provides a middle frame, the middle frame comprising:

[0012] The battery compartment described in the first aspect of the present application;

[0013] A middle plate, which is disposed around the periphery of the battery compartment and is connected to the connecting portion of the battery compartment; and

[0014] A frame is connected to the middle plate by bending, and the frame is arranged around the periphery of the middle plate.

[0015] A fourth aspect of the present application provides an electronic device, comprising:

[0016] A display screen, wherein the display screen has a display surface;

[0017] The middle frame described in the third aspect of the present application is arranged on a side of the display screen away from the display surface, and is used to support the display screen; and

[0018] A processor is located on a side of the middle frame away from the display screen, and the processor is electrically connected to the display screen to control the display screen to display.

[0019] In this embodiment, the battery compartment includes a support portion and a connecting portion, wherein the connecting portion is connected to the support portion and is arranged around the periphery of the support portion, the elastic modulus of the support portion is greater than the elastic modulus of the connecting portion, and the elongation of the support portion is less than the elongation of the connecting portion. The support portion has a better elastic modulus and a lower elongation, thereby having a higher mechanical strength and can be made thinner, thereby providing a larger space for the battery and accommodating a battery with a larger capacity; in addition, the connecting portion has a smaller elastic modulus and a larger elongation, thereby having a better processing performance, and can be processed into a more complex structure, which can better meet the design requirements of the complex structure of the battery compartment. As a result, the battery compartment of the embodiment of the present application has a higher mechanical strength and better mechanical processing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the planar structure of a battery compartment according to an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of a battery compartment according to an embodiment of the present application.

[0023] Figure 3The battery compartment edge of an embodiment of the present application Figure 1 Schematic diagram of the cross-sectional structure at the AA position.

[0024] Figure 4 The battery compartment edge of another embodiment of the present application Figure 1 Schematic diagram of the cross-sectional structure at the AA position.

[0025] Figure 5 It is a schematic structural diagram of the first reinforcing material of an embodiment of the present application.

[0026] Figure 6 It is a schematic structural diagram of the second reinforcing material of an embodiment of the present application.

[0027] Figure 7 It is a schematic structural diagram of a second reinforcing material according to another embodiment of the present application.

[0028] Figure 8 It is a schematic flow chart of a method for preparing a battery compartment according to an embodiment of the present application.

[0029] Fig. 9 It is a schematic flow chart of a method for preparing a battery compartment according to another embodiment of the present application.

[0030] Fig.10 It is a schematic flow chart of a method for preparing a first reinforcing material according to an embodiment of the present application.

[0031] Fig.11 It is a schematic flow chart of a method for preparing a second reinforcing material according to an embodiment of the present application.

[0032] Fig.12 It is a schematic flow chart of a method for preparing a battery compartment according to another embodiment of the present application.

[0033] Fig.13 It is a schematic diagram of the heat treatment process of one embodiment of the present application.

[0034] Fig.14 These are microscope images of the battery compartment of Example 1 of the present application, wherein (a) is a microscope image of the connection portion, and (b) is a microscope image of the support portion.

[0035] Fig.15 These are microscope images of the battery compartment of Example 5 of the present application, wherein (a) is a microscope image of the connection portion, and (b) is a microscope image of the support portion.

[0036] Fig.16 It is a schematic structural diagram of a middle frame of an embodiment of the present application.

[0037] Fig.17 It is a schematic diagram of a partial exploded structure of a middle frame of an embodiment of the present application.

[0038] Fig.18 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present application.

[0039] Fig.19 It is a schematic diagram of a partial exploded structure of an electronic device according to an embodiment of the present application.

[0040] Fig. 20 It is a circuit block diagram of an electronic device according to an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 100-battery compartment, 10-support part, 11-first metal layer, 12-first reinforcement layer, 12'-first reinforcement material, 121-first reinforcement body, 122-first modified metal layer, 20-connecting part, 21-second metal layer, 22-second reinforcement layer, 22'-second reinforcement material, 221-second reinforcement body, 222-second modified metal layer, 23-first connecting sub-part, 24-second connecting sub-part, 400-middle frame, 410-middle plate, 420-frame, 500-electronic device, 510-display screen, 511-display surface, 530-processor, 540-housing, 541-light-transmitting part, 550-memory, 570-camera module. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0044] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0045] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0046] It should be noted that, for the convenience of explanation, in the embodiments of the present application, the same figure marks represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0047] As electronic devices (such as mobile phones, tablets, etc.) continue to pursue thinness and large battery capacity, better requirements are put forward for battery compartments. The battery compartments are required to be thinner while ensuring strength to provide more space for the battery. In addition, the battery compartments are required to have good mechanical processing performance and can be processed into complex structures. However, the battery compartments of electronic devices in the related art are difficult to achieve the performance of both.

[0048] See also Figure 1 and Figure 2 An embodiment of the present application provides a battery compartment 100, which includes a support portion 10 and a connecting portion 20, wherein the connecting portion 20 is connected to the support portion 10 and is arranged around the periphery of the support portion 10, the elastic modulus of the support portion 10 is greater than the elastic modulus of the connecting portion 20, and the elongation of the support portion 10 is less than the elongation of the connecting portion 20.

[0049] The battery compartment 100 of the embodiment of the present application can be applied to the middle frame of an electronic device to support and accommodate the battery of the electronic device. Optionally, the middle frame can be, but is not limited to, a mobile phone middle frame, a tablet computer middle frame, a laptop middle frame, a desktop computer middle frame, a smart bracelet middle frame, a smart watch middle frame, an e-reader middle frame, a game console middle frame, and other portable electronic device middle frames.

[0050] It can be understood that the support portion 10 and the connection portion 20 are a structure together. The support portion 10 is used to support the battery, and the connection portion 20 is used to install the battery compartment 100 on the middle frame.

[0051] In this embodiment, the battery compartment 100 includes a support portion 10 and a connection portion 20, wherein the connection portion 20 is connected to the support portion 10 and is arranged around the outer periphery of the support portion 10, wherein the elastic modulus of the support portion 10 is greater than the elastic modulus of the connection portion 20, and the elongation of the support portion 10 is less than the elongation of the connection portion 20. The support portion 10 has a better elastic modulus and a lower elongation, thereby having a higher mechanical strength and can be made thinner, thereby providing a larger space for the battery and accommodating a battery with a larger capacity; in addition, the connection portion 20 has a smaller elastic modulus and a larger elongation, thereby having a better processing performance, and can be processed into a more complex structure, which can better meet the design requirements of the complex structure of the battery compartment 100. As a result, the battery compartment 100 of the embodiment of the present application has a higher mechanical strength and better mechanical processing performance.

[0052] In some embodiments, the thermal conductivity of the support portion 10 is greater than the thermal conductivity of the connection portion 20 , and the tensile strength of the support portion 10 is greater than the tensile strength of the connection portion 20 .

[0053] In this embodiment, the thermal conductivity of the support portion 10 is greater than the thermal conductivity of the connecting portion 20, so that the support portion 10 has higher thermal conductivity. When applied to electronic devices, it can better dissipate heat for the battery of the electronic device; the support portion 10 has better tensile strength and can provide better support for the battery, so that the support portion 10 can be made thinner while meeting the supporting performance for the battery, thereby providing a larger space for the battery and accommodating a battery with a larger capacity.

[0054] In some embodiments, the support portion 10 satisfies at least one of the following conditions:

[0055] The elastic modulus E1 of the support portion 10 is in the range of 110 GPa ≤ E1 ≤ 300 GPa;

[0056] The tensile strength σ1 of the support portion 10 is in the range of 300MPa≤σ1≤800MPa;

[0057] The elongation δ1 of the support portion 10 is in the range of 0.1%≤δ1≤2%;

[0058] The thermal conductivity coefficient λ1 (also called thermal conductivity) of the support portion 10 is in the range of 150 W / m·k≤λ1≤300 W / m·k; and

[0059] The density ρ1 of the support portion 10 is in the range of 2.5 g / cm 3 ≤ρ1≤2.9g / cm 3 .

[0060] Specifically, the elastic modulus E1 of the support portion 10 may be, but is not limited to, 110 GPa, 120 GPa, 140 GPa, 160 GPa, 180 GPa, 200 GPa, 220 GPa, 240 GPa, 260 GPa, 280 GPa, 300 GPa, etc. If the elastic modulus E1 of the support portion 10 is too low, the mechanical strength of the support portion 10 is reduced, which is not conducive to making the support portion 10 thinner; if the elastic modulus E1 of the support portion 10 is too high, the cost of the support portion 10 is increased, and it may even be difficult to achieve.

[0061] Specifically, the tensile strength σ1 of the support portion 10 may be, but is not limited to, 300 MPa, 350 MPa, 400 MPa, 450 MPa, 500 MPa, 550 MPa, 600 MPa, 650 MPa, 700 MPa, 750 MPa, 800 MPa, etc. If the tensile strength σ1 of the support portion 10 is too low, it is not conducive to making the support portion 10 thinner; if the tensile strength σ1 of the support portion 10 is too high, the brittleness of the support portion 10 is increased, and brittle fracture is likely to occur when subjected to external force.

[0062] Specifically, the elongation δ1 of the support portion 10 may be, but is not limited to, 0.1%, 0.3%, 0.5%, 0.8%, 1%, 1.3%, 1.5%, 1.8%, 2%, etc. If the elongation δ1 of the support portion 10 is too low, the brittleness of the support portion 10 is increased, and it is easy to break when subjected to external force; if the elongation δ1 of the support portion 10 is too high, the strength and rigidity of the support portion 10 are reduced, which is not conducive to making the support portion 10 thinner.

[0063] Specifically, the thermal conductivity λ1 of the support portion 10 may be, but is not limited to, 150 W / m·k, 160 W / m·k, 180 W / m·k, 200 W / m·k, 220 W / m·k, 240 W / m·k, 260 W / m·k, 280 W / m·k, 300 W / m·k, etc. If the thermal conductivity λ1 of the support portion 10 is too small, the heat dissipation performance of the support portion 10 is reduced; if the thermal conductivity λ1 of the support portion 10 is too high, the cost of the support portion 10 is increased, and it may even be difficult to achieve.

[0064] Specifically, the density ρ1 of the support portion 10 may be, but is not limited to, 2.5 g / cm 3 , 2.55g / cm 3 , 2.6g / cm 3 , 2.65g / cm 3 , 2.7g / cm 3 , 2.75g / cm 3 , 2.8g / cm 3 , 2.85g / cm 3 , 2.9g / cm 3 If the density ρ1 of the support portion 10 is too low, the cost of the support portion 10 will be increased, and it may even be difficult to achieve in terms of materials; if the density ρ1 of the support portion 10 is too high, the weight of the support portion 10 will be increased, which is not conducive to reducing the weight of the battery compartment 100. The support portion 10 of the embodiment of the present application has a lower density, so that the battery compartment 100 has a lower weight.

[0065] In some embodiments, the connecting portion 20 satisfies at least one of the following conditions:

[0066] The elastic modulus E2 of the connecting portion 20 is in the range of 65 GPa≤E2≤110 GPa;

[0067] The tensile strength σ2 of the connecting portion 20 is in the range of 200MPa≤σ2≤600MPa;

[0068] The elongation δ2 of the connecting portion 20 is in the range of 5%≤δ2≤20%;

[0069] The thermal conductivity λ2 of the connecting portion 20 is in the range of 100 W / m·k≤λ2≤250 W / m·k; and

[0070] The density ρ2 of the connecting portion 20 is in the range of 2.5 g / cm 3 ≤ρ2≤2.9g / cm 3 .

[0071] Specifically, the elastic modulus E2 of the connecting portion 20 may be, but is not limited to, 65 GPa, 70 GPa, 75 GPa, 80 GPa, 85 GPa, 90 GPa, 95 GPa, 100 GPa, 105 GPa, 110 GPa, etc. If the elastic modulus E2 of the connecting portion 20 is too low, the mechanical strength of the connecting portion 20 is reduced, and the service life of the battery compartment 100 is reduced; if the elastic modulus E2 of the connecting portion 20 is too high, the mechanical processing performance of the connecting portion 20 is reduced, which is not conducive to the design of the complex structure of the battery compartment 100.

[0072] Specifically, the tensile strength σ2 of the connection portion 20 may be, but is not limited to, 200 MPa, 250 MPa, 300 MPa, 350 MPa, 400 MPa, 450 MPa, 500 MPa, 550 MPa, 600 MPa, etc. If the tensile strength σ2 of the connection portion 20 is too low, the mechanical strength of the connection portion 20 is reduced, and the service life of the battery compartment 100 is reduced; if the tensile strength σ2 of the connection portion 20 is too high, the mechanical processing performance of the connection portion 20 is reduced, which is not conducive to the design of the complex structure of the battery compartment 100.

[0073] Specifically, the elongation δ2 of the connection portion 20 may be, but is not limited to, 5%, 6%, 8%, 10%, 12%, 14%, 16%, 18%, 20%, etc. If the elongation δ2 of the connection portion 20 is too low, the machining performance of the connection portion 20 is reduced, which is not conducive to the design of the complex structure of the battery compartment 100; if the elongation δ2 of the connection portion 20 is too high, the strength and rigidity of the connection portion 20 are reduced, the service life of the connection portion 20 is reduced, and thus the service life of the battery is reduced.

[0074] Specifically, the thermal conductivity λ2 of the connection part 20 may be, but is not limited to, 100W / m·k, 120W / m·k, 140W / m·k, 150W / m·k, 160W / m·k, 180W / m·k, 200W / m·k, 220W / m·k, 240W / m·k, 250W / m·k, etc. If the thermal conductivity λ2 of the connection part 20 is too small, the heat dissipation performance of the connection part 20 is reduced; if the thermal conductivity λ2 of the connection part 20 is too high, the cost of the connection part 20 is increased, or the elongation of the connection part 20 is reduced, which is not conducive to the design of the complex structure of the connection part 20.

[0075] Specifically, the density ρ2 of the connecting portion 20 may be, but is not limited to, 2.5 g / cm 3 , 2.55g / cm 3 , 2.6g / cm 3 , 2.65g / cm 3 , 2.7g / cm 3 , 2.75g / cm 3 , 2.8g / cm 3 , 2.85g / cm 3 , 2.9g / cm 3 If the density ρ2 of the connection part 20 is too low, the cost of the connection part 20 will be increased, and it may even be difficult to achieve in terms of materials; if the density ρ2 of the connection part 20 is too high, the weight of the connection part 20 will be increased, which is not conducive to reducing the weight of the battery compartment 100. The connection of the embodiment of the present application has a lower density, so that the battery compartment 100 has a lower weight.

[0076] In some embodiments, the supporting portion 10 includes a first metal material and a first reinforcing material, and the connecting portion 20 includes a second metal material.

[0077] Optionally, the volume fraction of the first metal material in the support portion 10 is smaller than the volume fraction of the second metal material in the connection portion 20 .

[0078] It can be understood that in some embodiments, the connecting portion 20 only includes the second metal material.

[0079] In this embodiment, the support portion 10 includes a first metal material and a first reinforcing material. By adding the first reinforcing material, the tensile strength and elastic modulus of the support portion 10 can be improved, so that the support portion 10 can be made thinner while meeting the supporting performance, thereby providing a larger space for the battery; in addition, the support portion 10 includes the first metal material, and the connecting portion 20 includes the second metal material, so that the support portion 10 and the connecting portion 20 both have good elongation and thermal conductivity, thereby having a better heat dissipation effect.

[0080] In some other embodiments, the connection portion 20 further includes a second reinforcing material, and the volume fraction of the first reinforcing material in the support portion 10 is greater than the volume fraction of the second reinforcing material in the connection portion 20 .

[0081] It can be understood that in this embodiment, the support portion 10 includes a first metal material and a first reinforcing material, and the connection portion 20 includes a second metal material and a second reinforcing material.

[0082] In this embodiment, a first reinforcing material is added to the supporting portion 10, and a second reinforcing material is added to the connecting portion 20, so that the mechanical strengths of the supporting portion 10 and the connecting portion 20 can be respectively improved; in addition, the volume fraction of the first reinforcing material in the supporting portion 10 is greater than the volume fraction of the second reinforcing material in the connecting portion 20, so that the volume fraction of the first reinforcing material in the supporting portion 10 is larger, which can make the supporting portion 10 have a higher elastic modulus and tensile strength, so that the supporting portion 10 can be made thinner to provide a larger space for the battery, and the volume fraction of the second reinforcing material in the connecting portion 20 is smaller, so that the connecting portion 20 has better mechanical processing performance, which is beneficial to the processing and design of the complex structure of the connecting portion 20.

[0083] In some embodiments, the volume fraction V11 of the first metal material in the support portion 10 is in the range of 40 vol%≤V11≤90 vol%, and the volume fraction V12 of the first reinforcement material in the support portion 10 is in the range of 10 vol%≤V12≤60 vol%.

[0084] Specifically, the volume fraction V11 of the first metal material in the support portion 10 may be, but is not limited to, 40 vol%, 45 vol%, 50 vol%, 55 vol%, 60 vol%, 65 vol%, 70 vol%, 75 vol%, 80 vol%, 85 vol%, 90 vol%, etc. If the volume fraction V11 of the first metal material in the support portion 10 is too low, the pores between the first reinforcing materials increase, the first metal material is insufficient to fill the pores between the first reinforcing materials, the bonding force between the first metal material and the first reinforcing material in the support portion 10 is insufficient, and more pores remain in the support portion 10, which reduces the mechanical properties of the support portion 10; if the volume fraction V11 of the first metal material in the support portion 10 is too high, the elastic modulus and strength of the support portion 10 are too low and cannot meet the requirements.

[0085] Specifically, the volume fraction V12 of the first reinforcing material in the support portion 10 may be, but is not limited to, 10 vol%, 15 vol%, 20 vol%, 25 vol%, 30 vol%, 35 vol%, 40 vol%, 45 vol%, 50 vol%, 55 vol%, 60 vol%, etc. If the volume fraction V12 of the first reinforcing material in the support portion 10 is too low, the elastic modulus and strength of the support portion 10 are too low to meet the requirements; if the volume fraction V12 of the first reinforcing material in the support portion 10 is too high, the pores between the first reinforcing materials increase, the first metal material is insufficient to fill the pores between the first reinforcing materials, the bonding force between the first metal material and the first reinforcing material in the support portion 10 is insufficient, and a large number of pores remain in the support portion 10, which reduces the mechanical properties of the support portion 10.

[0086] Furthermore, the volume fraction V11 of the first metal material in the support portion 10 is in the range of 60 vol%≤V11≤70 vol%, and the volume fraction V12 of the first reinforcing material in the support portion 10 is in the range of 30 vol%≤V12≤40 vol%. In this way, the support portion 10 can have a better elastic modulus and tensile strength, and the first metal material can be more fully connected to the first reinforcing material to avoid a large number of pores in the reinforcing material, so that the support portion 10 has higher mechanical properties.

[0087] In some embodiments, the volume fraction V21 of the second metal material in the connection portion 20 is in the range of 90 vol%≤V21≤99.9 vol%, and the volume fraction V22 of the second reinforcement material in the connection portion 20 is in the range of 0.1 vol%≤V22≤10 vol%.

[0088] Specifically, the volume fraction V21 of the second metal material in the connecting portion 20 may be, but is not limited to, 90 vol%, 91 vol%, 92 vol%, 93 vol%, 94 vol%, 95 vol%, 96 vol%, 97 vol%, 98 vol%, 99 vol%, 99.5 vol%, 99.9 vol%, etc. If the volume fraction V21 of the second metal material in the connecting portion 20 is too low, the elongation of the connecting portion 20 is significantly reduced, and it is difficult to meet the processing requirements of complex structures; if the volume fraction V21 of the second metal material in the connecting portion 20 is too high, the elastic modulus and tensile strength of the connecting portion 20 are too low, and the service life of the connecting portion 20 is reduced.

[0089] Specifically, the volume fraction V22 of the second reinforcing material in the connecting portion 20 may be, but is not limited to, 0.1 vol%, 0.5 vol%, 1 vol%, 2 vol%, 3 vol%, 4 vol%, 5 vol%, 6 vol%, 7 vol%, 8 vol%, 9 vol%, 10 vol%, etc. If the volume fraction V22 of the second reinforcing material in the connecting portion 20 is too low, the elastic modulus and tensile strength of the connecting portion 20 are too low, which reduces the service life of the connecting portion 20; if the volume fraction V22 of the second reinforcing material in the connecting portion 20 is too high, the elongation of the connecting portion 20 is significantly reduced, which makes it difficult to meet the processing requirements of complex structures.

[0090] Furthermore, the volume fraction V21 of the second metal material in the connecting portion 20 is in the range of 91 vol%≤V21≤94 vol%, and the volume fraction V22 of the second reinforcing material in the connecting portion 20 is in the range of 6 vol%≤V22≤9 vol%. In this way, the connecting portion 20 can have a higher elongation, better complex structure processing performance, and higher elastic modulus and tensile strength.

[0091] See also Figure 3 In some embodiments, the support portion 10 includes at least two first metal layers 11 and at least one first reinforcement layer 12, the first metal layers 11 and the first reinforcement layers 12 are alternately stacked in sequence, the first metal layer 11 includes a first metal material, and the first reinforcement layer 12 includes a first reinforcement material.

[0092] It should be noted that the first metal layer 11 and the first reinforcement layer 12 are alternately stacked in sequence along the thickness direction of the support portion 10. The stacking direction of the first metal layer 11 and the first reinforcement layer 12 intersects with the arrangement direction of the support portion 10 and the connection portion 20. In a specific example, the stacking direction of the first metal layer 11 and the first reinforcement layer 12 is perpendicular to the arrangement direction of the support portion 10 and the connection portion 20.

[0093] It should be noted that the number of first metal layers 11 is greater than the number of first reinforcement layers 12, and the outermost layers on opposite sides of the support portion 10 are both first metal layers 11. It can be understood that each first reinforcement layer 12 is located between two first metal layers 11.

[0094] Optionally, the number of the first metal layers 11 may be, but is not limited to, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, etc.

[0095] Optionally, the number of the first reinforcement layers 12 may be, but is not limited to, 1 layer, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, etc.

[0096] In this embodiment, the first metal layer 11 and the first reinforcement layer 12 of the support portion 10 are alternately stacked, so that the preparation process of the support portion 10 can be simplified and the preparation cost of the battery compartment 100 can be reduced.

[0097] In some embodiments, the first metal material includes at least one of aluminum, aluminum alloy, magnesium, and magnesium alloy. Using these metal materials can make the support part 10 have a lower density, so that the support part 10 can have a lighter weight.

[0098] Optionally, the aluminum alloy may be but is not limited to at least one of 1 series aluminum alloy (also known as pure aluminum), 2 series aluminum alloy, 3 series aluminum alloy, 4 series aluminum alloy, 5 series aluminum alloy, 6 series aluminum alloy, 7 series aluminum alloy and the like.

[0099] Optionally, the first metal layer 11 may be formed of a first metal foil or a first metal powder.

[0100] Optionally, the first metal layer 11 may be, but is not limited to, at least one of an aluminum layer, an aluminum alloy layer, a magnesium layer, and a magnesium alloy layer.

[0101] Optionally, the thickness of the first metal layer 11 ranges from 0.02 mm to 0.2 mm. Specifically, the thickness of the first metal layer 11 may be, but is not limited to, 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, 0.2 mm, etc. If the thickness of the first metal layer 11 is too thin, the preparation cost of the battery compartment 100 is increased; if the thickness of the first metal layer 11 is too thick, it is not conducive to the design of the laminated structure of the support portion 10.

[0102] Optionally, the first metal powder may be, but is not limited to, at least one of aluminum powder, aluminum alloy powder, magnesium powder, and magnesium alloy powder.

[0103] Optionally, the first metal powder is nearly spherical, and the median particle size D50 of the first metal powder ranges from 5 μm to 15 μm. Specifically, the median particle size D50 of the first metal powder may be, but is not limited to, 5 μm, 6 μm, 8 μm, 10 μm, 12 μm, 14 μm, 15 μm, etc. If the median particle size D50 of the first metal powder is too small, the fluidity of the first metal powder is poor, which is not conducive to the preparation of the support part 10; if the median particle size D50 of the first metal powder is too large, the surface adhesion between the first metal powder and the first fiber cloth is poor, and the material mechanical properties of the support part 10 are reduced.

[0104] In one specific example, when the first metal layer 11 is formed of an aluminum alloy foil (i.e., the first metal foil is an aluminum alloy foil), the aluminum alloy is a 1-series aluminum alloy. In another specific example, the first metal layer 11 is formed of an aluminum alloy powder (i.e., the first metal powder is an aluminum alloy powder), and the aluminum alloy is at least one of a 2-series aluminum alloy, a 5-series aluminum alloy, a 6-series aluminum alloy, a 7-series aluminum alloy, and the like.

[0105] Optionally, the first reinforcement layer 12 is a first fiber cloth. In other words, the first reinforcement material is a first fiber cloth.

[0106] Optionally, the first reinforcing material includes at least one of carbon fiber and glass fiber. Compared with glass fiber, when the first reinforcing material is carbon fiber, the support portion 10 can have a higher elastic modulus and tensile strength, and can have a higher thermal conductivity, so that when applied to electronic equipment, it has a better thermal conductivity effect.

[0107] Optionally, the carbon fiber may be at least one of, but not limited to, polyacrylonitrile-based carbon fiber, asphalt-based carbon fiber, viscose-based carbon fiber, lignin fiber-based carbon fiber, and the like.

[0108] In a specific example, the carbon fiber is a polyacrylonitrile-based carbon fiber. Optionally, the polyacrylonitrile-based carbon fiber can be at least one of an M-type polyacrylonitrile-based carbon fiber and a T-type polyacrylonitrile-based carbon fiber.

[0109] Optionally, the first fiber cloth may be, but is not limited to, at least one of carbon fiber cloth, glass fiber cloth and the like.

[0110] Optionally, the first fiber cloth may be, but is not limited to, at least one of a unidirectional continuous fiber cloth and a bidirectional continuous fiber cloth.

[0111] Optionally, when the first fiber cloth is a unidirectional continuous fiber cloth, the first reinforcing layer 12 is at least two layers, that is, the first fiber cloth is at least two layers, and the orientation directions of the fiber bundles of the two adjacent layers of the first fiber cloth are set at an angle. Optionally, the angle between the orientation directions of the fiber bundles of the two adjacent layers of the first fiber cloth is 45° or 90°. The unidirectional continuous fiber cloth is woven from fiber bundles in the same direction. The unidirectional continuous fiber cloth has high strength in the parallel fiber direction (longitudinal), but weak strength in the perpendicular fiber direction (transverse). By making the orientation directions of the fiber bundles of the two adjacent layers of the first fiber cloth be set at an angle, the anisotropy problem of the strength of the first fiber cloth in the longitudinal and transverse directions can be overcome. Bidirectional continuous carbon fiber cloth is woven from fiber bundles in different directions. Common satin, plain and twill weaves can meet the requirements; its characteristics are relatively balanced strength in all directions and small anisotropy, and the disadvantage is that the thickness cannot be made very thin.

[0112] Optionally, the carbon fiber cloth may be, but is not limited to, at least one of a unidirectional continuous carbon fiber cloth and a bidirectional continuous carbon fiber cloth.

[0113] Optionally, the glass fiber cloth may be, but is not limited to, at least one of a unidirectional continuous glass fiber cloth and a bidirectional continuous glass fiber cloth.

[0114] Optionally, the thickness of the first fiber cloth ranges from 0.02 mm to 0.3 mm. Specifically, the thickness of the first fiber cloth may be, but is not limited to, 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, 0.2 mm, 0.22 mm, 0.24 mm, 0.26 mm, 0.28 mm, 0.3 mm, etc. If the thickness of the first fiber cloth is too thin, the requirements for the yarn spreading of the first fiber cloth will increase, the difficulty of the preparation process of the first fiber cloth will increase, and the cost of the first fiber cloth will increase; if the thickness of the first fiber cloth is too thick, it will be unfavorable for the design of the laminated structure of the first metal layer 11 and the first reinforcement layer 12 of the support part 10.

[0115] In the embodiments of the present application, when a numerical value range from a to b is involved, unless otherwise specified, it means that the numerical value can be any numerical value between a and b, including the endpoint numerical value a and the endpoint numerical value b.

[0116] In a specific example, when the first fiber cloth is a unidirectional continuous fiber cloth, the thickness of the first fiber cloth is 0.02 mm to 0.11 mm, and the surface density of the first fiber cloth is in the range of 20 g / m 2 Up to 100g / m 2 Specifically, the surface density of the first fiber cloth may be, but is not limited to, 20 g / m 2 , 40g / m 2 , 60g / m 2 , 80g / m 2 , 100g / m 2 wait.

[0117] In another specific example, when the first fiber cloth is a bidirectional continuous fiber cloth, the thickness of the first fiber cloth is 0.1 mm to 0.3 mm, and the surface density of the first fiber cloth is in the range of 100 g / m 2 Up to 300g / m 2 Specifically, the surface density of the first fiber cloth may be, but is not limited to, 100 g / m 2 , 130g / m 2 , 150g / m 2 , 180g / m 2 , 200g / m 2 , 230g / m 2 , 250g / m2 , 280g / m 2 , 300g / m 2 wait.

[0118] Optionally, the first fiber cloth comprises a plurality of fiber bundles, which are woven or braided to form the first fiber cloth, each fiber bundle comprises a fiber filament of 1K to 24K, and a diameter of each fiber filament is 5 μm to 15 μm.

[0119] Specifically, the number of fiber filaments per fiber bundle may be, but is not limited to, 1K, 3K, 6K, 8K, 10K, 12K, 15K, 18K, 20K, 22K, 24K, etc. The smaller the number of fiber filaments per fiber bundle, the easier it is to make the first fiber cloth thinner, but the yarn spreading requirement is higher, which increases the cost of the first fiber cloth.

[0120] Specifically, the diameter of each fiber filament may be, but is not limited to, 5 μm, 7 μm, 8 μm, 10 μm, 12 μm, 14 μm, 15 μm, etc. Further, the diameter of the fiber filament is selected to be 7 μm to 10 μm. The first fiber cloth of these specifications has a large market usage and a lower cost, which can better reduce the cost of the battery compartment 100.

[0121] Optionally, the tensile strength of the fiber filaments ranges from 2 GPa to 8 GPa. Specifically, the tensile strength of the fiber filaments may be, but is not limited to, 2 GPa, 3 GPa, 4 GPa, 5 GPa, 6 GPa, 7 GPa, 8 GPa, and the like.

[0122] Optionally, the tensile modulus of the fiber filaments ranges from 200 GPa to 800 GPa. Specifically, the tensile modulus of the fiber filaments may be, but is not limited to, 200 GPa, 300 GPa, 400 GPa, 500 GPa, 600 GPa, 700 GPa, 800 GPa, and the like.

[0123] Please see again Figure 3 In some embodiments, the connecting portion 20 includes at least two second metal layers 21 and at least one second reinforcement layer 22, the second metal layers 21 and the second reinforcement layers 22 are alternately stacked in sequence, the second metal layers 21 include a second metal material, and the second reinforcement layer 22 includes a second reinforcement material.

[0124] It should be noted that the second metal layer 21 and the second reinforcement layer 22 are alternately stacked in sequence along the thickness direction of the connecting portion 20. The stacking direction of the second metal layer 21 and the second reinforcement layer 22 intersects with the arrangement direction of the support portion 10 and the connecting portion 20. In a specific example, the stacking direction of the second metal layer 21 and the second reinforcement layer 22 is perpendicular to the arrangement direction of the support portion 10 and the connecting portion 20.

[0125] It should be noted that the number of second metal layers 21 is greater than the number of second reinforcement layers 22, and the outermost layers on opposite sides of the connecting portion 20 are both second metal layers 21. It can be understood that each second reinforcement layer 22 is located between two second metal layers 21.

[0126] Optionally, the number of the second metal layers 21 may be, but is not limited to, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, etc.

[0127] Optionally, the number of the second reinforcement layers 22 may be, but is not limited to, 1 layer, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, etc.

[0128] In this embodiment, the second metal layers 21 and the second metal layers 21 of the connecting portion 20 are alternately stacked, so that the preparation process of the connecting portion 20 can be simplified and the preparation cost of the battery compartment 100 can be reduced.

[0129] See also Figure 4 In other embodiments, the second reinforcing material is dispersed in the second metal material. Compared with the solution in which the second metal layer 21 and the second reinforcing layer 22 are alternately stacked, in this embodiment, the second reinforcing material is dispersed in the second metal material, so that the second reinforcing material and the second metal material can be more fully in contact, increasing the bonding performance of the second metal material and the second reinforcing material, thereby improving the mechanical properties of the connecting portion 20.

[0130] In some embodiments, the second metal material includes at least one of aluminum, aluminum alloy, magnesium, and magnesium alloy. Using these metal materials can make the connection part 20 have a lower density, so that the connection part 20 can have a lighter weight.

[0131] Optionally, the aluminum alloy may be but is not limited to at least one of 1 series aluminum alloy (also known as pure aluminum), 2 series aluminum alloy, 3 series aluminum alloy, 4 series aluminum alloy, 5 series aluminum alloy, 6 series aluminum alloy, 7 series aluminum alloy and the like.

[0132] Optionally, the second metal layer 21 may be formed of a second metal foil or a second metal powder.

[0133] Optionally, the second metal layer 21 may be, but is not limited to, at least one of an aluminum layer, an aluminum alloy layer, a magnesium layer, and a magnesium alloy layer.

[0134] Optionally, the thickness of the second metal layer 21 ranges from 0.02 mm to 0.2 mm. Specifically, the thickness of the second metal layer 21 may be, but is not limited to, 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, 0.2 mm, etc. If the thickness of the second metal layer 21 is too thin, the preparation cost of the battery compartment 100 is increased; if the thickness of the second metal layer 21 is too thick, it is not conducive to the design of the laminated structure of the connecting portion 20.

[0135] Optionally, the second metal powder may be, but is not limited to, at least one of aluminum powder, aluminum alloy powder, magnesium powder, and magnesium alloy powder.

[0136] Optionally, the second metal powder is nearly spherical, and the median particle size D'50 of the second metal powder ranges from 5 μm to 15 μm. Specifically, the median particle size D'50 of the second metal powder may be, but is not limited to, 5 μm, 6 μm, 8 μm, 10 μm, 12 μm, 14 μm, 15 μm, etc. If the median particle size D'50 of the second metal powder is too small, the fluidity of the second metal powder is poor, which is not conducive to the preparation of the connecting portion 20; if the median particle size D'50 of the second metal powder is too large, the surface adhesion of the second metal powder to the second fiber cloth or short fibers is poor, and the material mechanical properties of the connecting portion 20 are reduced.

[0137] In one specific example, when the second metal layer 21 is formed of an aluminum alloy foil (i.e., the second metal foil is an aluminum alloy foil), the aluminum alloy is a 1-series aluminum alloy. In another specific example, the second metal layer 21 is formed of an aluminum alloy powder (i.e., the second metal powder is an aluminum alloy powder), and the aluminum alloy is at least one of a 2-series aluminum alloy, a 5-series aluminum alloy, a 6-series aluminum alloy, a 7-series aluminum alloy, and the like.

[0138] Optionally, the second reinforcement layer 22 is a second fiber cloth. In other words, the second reinforcement material is a second fiber cloth.

[0139] Optionally, the second reinforcement material includes at least one of carbon fiber and glass fiber. Compared with glass fiber, when the second reinforcement material is carbon fiber, the support portion 10 can have a higher elastic modulus and tensile strength, and can have a higher thermal conductivity, so that when applied to electronic equipment, it has a better thermal conductivity effect.

[0140] Optionally, the carbon fiber may be at least one of, but not limited to, polyacrylonitrile-based carbon fiber, asphalt-based carbon fiber, viscose-based carbon fiber, lignin fiber-based carbon fiber, and the like.

[0141] In a specific example, the carbon fiber is a polyacrylonitrile-based carbon fiber. Optionally, the polyacrylonitrile-based carbon fiber can be at least one of an M-type polyacrylonitrile-based carbon fiber and a T-type polyacrylonitrile-based carbon fiber.

[0142] Optionally, the second fiber cloth may be, but is not limited to, at least one of carbon fiber cloth, glass fiber cloth, etc. Optionally, the second fiber cloth may be, but is not limited to, a discontinuous fiber cloth, such as a discontinuous carbon fiber cloth (i.e., ordinary carbon fiber cloth or a discontinuous carbon fiber mat stack) or a discontinuous glass fiber cloth.

[0143] In another specific embodiment, when the second reinforcement material is dispersed in the second metal material, the second reinforcement material reinforces powder, the reinforcement powder is short fibers, and the second metal material is formed by the second metal powder.

[0144] Optionally, the short fibers may be at least one of short carbon fibers, short glass fibers, and the like.

[0145] Short carbon fiber is also called ground carbon fiber, which is a carbon fiber powder obtained by surface treatment, grinding, screening and drying of carbon fiber filaments. The type of short carbon fiber is at least one of polyacrylonitrile-based carbon fiber, asphalt-based carbon fiber, viscose-based carbon fiber and lignin fiber-based carbon fiber. Furthermore, the short carbon fiber is polyacrylonitrile-based carbon fiber.

[0146] Optionally, the length of the short fibers is in the range of 10 μm to 1000 μm. Specifically, the length of the short fibers may be, but is not limited to, 10 μm, 20 μm, 30 μm, 50 μm, 80 μm, 100 μm, 150 μm, 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm, 1000 μm, etc. Too long or too short a length of the short fibers is not conducive to the dispersion of the short fibers, making the short fibers easy to agglomerate, thereby reducing the strength of the connecting portion 20.

[0147] Furthermore, the length of the short fibers is in the range of 20 μm to 200 μm, which is more conducive to the dispersion of the short fibers in the second metal material and improves the strength of the connecting portion 20 .

[0148] Optionally, the diameter of the short fiber ranges from 5 μm to 15 μm. Specifically, the diameter of the short fiber can be, but is not limited to, 5 μm, 7 μm, 8 μm, 10 μm, 12 μm, 14 μm, 15 μm, etc. Further, the diameter of the short fiber is selected to be 7 μm to 10 μm. The market usage of short fibers of these specifications is large and the cost is lower, which can better reduce the cost of the battery compartment 100.

[0149] See also Figure 5In some embodiments, the first reinforcing material 12 ′ includes a first reinforcing body 121 and a first modified metal layer 122 , and the first modified metal layer 122 is wrapped around the periphery of the first reinforcing body 121 .

[0150] See also Figure 6 and Figure 7 The second reinforcing material 22 ′ includes a second reinforcing body 221 and a second modified metal layer 222 , and the second modified metal layer 222 is wrapped around the outer periphery of the second reinforcing body 221 .

[0151] Optionally, the first reinforcing body 121 is a first fiber cloth. For detailed description of other aspects of the first fiber cloth, please refer to the description of the corresponding part of the above embodiment, which will not be repeated here.

[0152] Optionally, the second reinforcing body 221 may be, but is not limited to, at least one of a second fiber cloth and short fibers. For detailed descriptions of other aspects of the second fiber cloth and short fibers, please refer to the descriptions of the corresponding parts of the above embodiments, which will not be repeated here.

[0153] Optionally, the first modified metal layer 122 includes at least one of copper, nickel, etc. When the first metal material is an aluminum alloy and the first fiber cloth is a carbon fiber cloth, since the wettability of carbon fiber to aluminum is poor, plating nickel or copper on the surface of the carbon fiber can improve the wettability of carbon fiber to aluminum; in addition, when the first metal material is compounded with the first reinforcing material 12', the carbon fiber is easy to react with aluminum to generate a hard and brittle phase Al 4 C 3 , resulting in a decrease in bonding strength; Ni can react with aluminum to form Al 3 N 4 Wrapped on the surface of carbon fiber, Cu can react with aluminum to form CuAl 2 and Cu 9 Al 4 phase, thereby suppressing the Al 4 C 3 Phase generation.

[0154] Optionally, the second modified metal layer 222 includes at least one of copper, nickel, etc. When the second metal material is aluminum alloy and the second fiber cloth is carbon fiber cloth or short carbon fiber, since the wettability of carbon fiber to aluminum is poor, plating nickel or copper on the surface of carbon fiber can improve the wettability of carbon fiber to aluminum; in addition, when the second metal material is compounded with the second reinforcing material 22', the carbon fiber is easy to react with aluminum to generate a hard and brittle phase Al 4 C 3 , resulting in a decrease in bonding strength; Ni can react with aluminum to form Al 3 N 4 Wrapped on the surface of carbon fiber, Cu can react with aluminum to form CuAl 2 and Cu9 Al 4 phase, thereby suppressing the Al 4 C 3 Phase generation.

[0155] In this embodiment, by setting a first modified metal layer 122 on the periphery of the first reinforcing body 121, the wettability of the first reinforcing body 121 and the first metal material can be improved, and the generation of hard and brittle phases can be suppressed, thereby improving the bonding force between the first reinforcing body 121 and the first metal material, thereby improving the mechanical properties of the support portion 10; a second modified metal layer 222 is set on the periphery of the second reinforcing body 221, so that the wettability of the second reinforcing body 221 and the second metal material can be improved, and the generation of hard and brittle phases can be suppressed, thereby improving the bonding force between the second reinforcing body 221 and the second metal material, thereby improving the mechanical properties of the connecting portion 20.

[0156] Optionally, the thickness of the first modified metal layer 122 ranges from 50nm to 200nm. Specifically, the thickness of the first modified metal layer 122 may be, but is not limited to, 50nm, 80nm, 100nm, 120nm, 140nm, 160nm, 180nm, 200nm, etc. If the thickness of the first modified metal layer 122 is too thin, it is insufficient to wrap the first reinforcing body 121, which is not conducive to improving the bonding force between the first reinforcing body 121 and the first modified metal layer 122; when the thickness of the first modified metal layer 122 is too thick, it is easy to generate a large internal stress, resulting in the support portion 10 being easily weak, and the first modified metal layer 122 requires a longer coating time, increasing the cost of the support portion 10.

[0157] Optionally, the thickness of the second modified metal layer 222 ranges from 50nm to 200nm. Specifically, the thickness of the second modified metal layer 222 may be, but is not limited to, 50nm, 80nm, 100nm, 120nm, 140nm, 160nm, 180nm, 200nm, etc. If the thickness of the second modified metal layer 222 is too thin, it is insufficient to wrap the second reinforcing body 221, which is not conducive to improving the bonding force between the second reinforcing body 221 and the second modified metal layer 222; when the thickness of the second modified metal layer 222 is too thick, it is easy to generate a large internal stress, resulting in the connection portion 20 being easy to be weak, and the second modified metal layer 222 needs to be plated for a longer time, increasing the cost of the connection portion 20.

[0158] Optionally, the thickness of the support portion 10 ranges from 0.1 mm to 0.5 mm. Specifically, the thickness of the support portion 10 may be, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc. If the thickness of the support portion 10 is too thin, the support performance and service life of the support portion 10 are reduced; if the thickness of the support portion 10 is too thick, the space provided for the battery is reduced, which is not conducive to increasing the battery capacity.

[0159] Optionally, the thickness of the connecting portion 20 ranges from 0.1 mm to 0.5 mm. Specifically, the thickness of the connecting portion 20 may be, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc. If the thickness of the connecting portion 20 is too thin, the strength of the connecting portion 20 is reduced; if the thickness of the connecting portion 20 is too thick, the cost of the battery compartment 100 is increased.

[0160] See also Figure 2 Optionally, the connecting portion 20 includes a first connecting sub-portion 23 and a plurality of second connecting sub-portions 24, the first connecting sub-portion 23 is arranged on the periphery of the supporting portion 10 and connected to the supporting portion 10, the plurality of second connecting sub-portions 24 are arranged at intervals at one end of the first connecting sub-portion 23 away from the supporting portion 10, and the plurality of second connecting sub-portions 24 are respectively bent and connected to the first connecting sub-portion 23, and the plurality of second connecting sub-portions 24 are used to connect the middle plate of the middle frame.

[0161] It can be understood that the connecting portion 20 and the first connecting sub-portion 23 are both annular structures.

[0162] Optionally, the line width of the first connecting sub-portion 23 ranges from 1 mm to 3 mm. Specifically, the line width of the first connecting sub-portion 23 may be, but is not limited to, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. If the line width of the first connecting sub-portion 23 is too narrow, it is not conducive to the connection between the second connecting sub-portion 24 and the supporting portion 10, and is not conducive to the processing of the second connecting sub-portion 24; if the line width of the first connecting sub-portion 23 is too wide, the connection portion 20 occupies too large a proportion, reducing the mechanical strength of the battery compartment 100.

[0163] Optionally, the second connecting sub-portion 24 includes at least one of a buckle, a screw hole, a groove, etc., so as to be assembled and connected with the middle plate.

[0164] The battery compartment 100 of the embodiment of the present application can be prepared by the method described in the following embodiments of the present application. In addition, it can also be prepared by other methods. The preparation method of the embodiment of the present application is merely one or more preparation methods of the battery compartment 100 of the present application and should not be understood as a limitation on the battery compartment 100 provided in the embodiment of the present application.

[0165] See also Figure 8The present application also provides a method for preparing a battery compartment 100, the method comprising:

[0166] S201, providing a first metal material, a second metal material and a first reinforcing material 12';

[0167] For detailed description of other aspects of the first metal material, the second metal material and the first reinforcing material 12 ′, please refer to the description of the corresponding parts of the above embodiment, which will not be repeated here.

[0168] S202, laying a first metal material, a second metal material and a first reinforcing material 12' to form a stacked body, wherein the stacked body includes a first portion and a second portion, wherein the second portion surrounds the periphery of the first portion, the first portion includes the first metal material and the first reinforcing material 12', and the second portion includes the second metal material; and

[0169] S203, hot-pressing the stacked body so that the first part forms a supporting part 10 and the second part forms a connecting part 20, thereby obtaining a battery compartment 100, wherein the battery compartment 100 includes a supporting part 10 and a connecting part 20, the connecting part 20 is connected to the supporting part 10 and is arranged around the periphery of the supporting part 10, the elastic modulus of the supporting part 10 is greater than the elastic modulus of the connecting part 20, and the elongation of the supporting part 10 is less than the elongation of the connecting part 20.

[0170] For detailed description of other aspects of the battery compartment 100 , the support portion 10 , and the connecting portion 20 , please refer to the description of the corresponding parts of the above embodiments, which will not be repeated here.

[0171] For detailed description of other aspects of the first metal material, the second metal material and the first reinforcing material 12 ′, please refer to the description of the corresponding parts of the above embodiment, which will not be repeated here.

[0172] The preparation method of the battery compartment 100 of the present application adopts a first metal material, a second metal material and a first reinforcing material 12' to be laid and stacked, and then hot-pressed to form the battery compartment 100. The method is simple and the preparation cost is low. In addition, the battery compartment 100 prepared by the preparation method of the battery compartment 100 of the present application includes a support portion 10 and a connecting portion 20, wherein the connecting portion 20 is connected to the support portion 10 and is arranged around the periphery of the support portion 10, and the elastic modulus of the support portion 10 is greater than the elastic modulus of the connecting portion 20, and the elongation of the support portion 10 is less than the elongation of the connecting portion 20. The support portion 10 has a better elastic modulus and a lower elongation, thereby having a higher mechanical strength and can be made thinner, thereby providing a larger space for the battery and accommodating a battery with a larger capacity; in addition, the connecting portion 20 has a smaller elastic modulus and a larger elongation, thereby having a better processing performance, and can be processed into a more complex structure, which can better meet the design requirements of the complex structure of the battery compartment 100. As a result, the battery compartment 100 of the embodiment of the present application has both high mechanical strength and good machining performance.

[0173] In some embodiments, S201 also includes providing a second reinforcing material 22', then in S202, the first metal material, the second metal material and the first reinforcing material 12' are laid to form a stack, including: laying the first metal material, the second metal material, the first reinforcing material 12' and the second reinforcing material 22' to form a stack, and the second part also includes the second reinforcing material 22'.

[0174] It can be understood that in this embodiment, the second portion includes a second metal material and a second reinforcing material 22 ′.

[0175] Understandably, see Fig. 9 The preparation method of the battery compartment 100 of this embodiment includes:

[0176] S201', providing a first metal material, a second metal material, a first reinforcing material 12' and a second reinforcing material 22';

[0177] S202', laying the first metal material, the second metal material, the first reinforcing material 12' and the second reinforcing material 22' to form a stacked body, wherein the stacked body includes a first portion and a second portion, wherein the second portion surrounds the periphery of the first portion, the first portion includes the first metal material and the first reinforcing material 12', and the second portion includes the second metal material and the second reinforcing material 22'; and

[0178] S203', hot-pressing the stacked body so that the first part forms a supporting part 10 and the second part forms a connecting part 20, thereby obtaining a battery compartment 100, wherein the battery compartment 100 includes a supporting part 10 and a connecting part 20, the connecting part 20 is connected to the supporting part 10 and is arranged around the periphery of the supporting part 10, the elastic modulus of the supporting part 10 is greater than the elastic modulus of the connecting part 20, and the elongation of the supporting part 10 is less than the elongation of the connecting part 20.

[0179] For detailed description of S201 ′ to S203 ′, please refer to the description of the corresponding part of the above embodiment, which will not be repeated here.

[0180] In this embodiment, the support portion 10 of the manufactured battery compartment 100 includes a first reinforcing material 12 ′, and the connecting portion 20 includes a second reinforcing material 22 ′, so that the mechanical strengths of the support portion 10 and the connecting portion 20 can be improved respectively.

[0181] Optionally, the volume fraction of the first reinforcing material 12' in the first part is greater than the volume fraction of the second reinforcing material 22' in the second part. In this way, the volume fraction of the first reinforcing material 12' in the support part 10 of the manufactured battery compartment 100 is greater than the volume fraction of the second reinforcing material 22' in the connecting part 20, so that the volume fraction of the first reinforcing material 12' in the support part 10 is larger, which can make the support part 10 have a higher elastic modulus and tensile strength, and the support part 10 can be made thinner to provide more space for the battery. The volume fraction of the second reinforcing material 22' in the connecting part 20 is smaller, so that the connecting part 20 has better mechanical processing performance, which is conducive to the processing and design of the complex structure of the connecting part 20.

[0182] See also Fig.10 In some embodiments, in S201, providing the first reinforcing material 12' includes:

[0183] S2011, providing a first enhanced body 121; and

[0184] Optionally, the first reinforcing body 121 is a first fiber cloth. For detailed description of other aspects of the first fiber cloth, please refer to the description of the corresponding part of the above embodiment, which will not be repeated here.

[0185] Optionally, providing the first reinforcing body 121 further includes: ultrasonically cleaning the first reinforcing body 121 (such as the first fiber cloth) with an organic solvent (acetone, ethanol, etc.) to remove impurities such as polymerized resin and oil stains on the surface of the first reinforcing body 121, and then drying.

[0186] S2012 , plating a first modified metal layer 122 on the surface of the first reinforcing body 121 .

[0187] Optionally, a layer of nickel or copper is plated on the surface of the first reinforcement body 121 by electroplating, chemical plating, chemical vapor deposition, physical vapor deposition, plasma spraying, etc. to form a first modified metal layer 122. This can improve the bonding force between the first reinforcement body 121 and the first metal material, thereby improving the mechanical properties of the support portion 10.

[0188] Optionally, the first modified metal layer 122 is formed by electroplating or chemical plating, which can better reduce the cost of the first modified metal layer 122 and make the first modified metal layer 122 have higher quality. The electroplating method is to use the principle of electrolysis to oxidize the anode metal into ions and enter the plating solution under the action of external direct current, and then reduce it at the cathode and precipitate it into a coating. Chemical plating is a method of reducing metal ions in the plating solution into a metal coating with the help of a suitable reducing agent using an oxidation-reduction reaction in the absence of an external current. The nickel or copper coating is tightly bonded to the carbon fiber through a Ni-CO bond or a Cu-CO bond.

[0189] It can be understood that the first modified metal layer 122 may include but is not limited to at least one of nickel and copper.

[0190] For detailed description of other aspects of the first modified metal layer 122 , please refer to the description of the corresponding parts of the above embodiment, which will not be repeated here.

[0191] When the first metal material is aluminum alloy and the first fiber cloth is carbon fiber cloth, since the wettability of carbon fiber and aluminum is poor, nickel or copper plating on the surface of carbon fiber can improve the wettability of carbon fiber and aluminum; in addition, when the first metal material is compounded with the first reinforcing material 12', the carbon fiber is easy to react with aluminum to generate a hard and brittle phase Al 4 C 3 , resulting in a decrease in bonding strength; Ni can react with aluminum to form Al 3 N 4 Wrapped on the surface of carbon fiber, Cu can react with aluminum to form CuAl 2 and Cu 9 Al 4 phase, thereby suppressing the Al 4 C 3 Phase generation.

[0192] See also Fig.11 In some embodiments, in S201, providing the second reinforcing material 22' includes:

[0193] S2011', providing a second enhanced body 221; and

[0194] Optionally, the second reinforcement body 221 is a second fiber cloth or short fibers (ie, reinforcement powder). For detailed description of other aspects of the second fiber cloth, please refer to the description of the corresponding part of the above embodiment, which will not be repeated here.

[0195] Optionally, providing the second reinforcing body 221 further includes: ultrasonically cleaning the second reinforcing body 221 (such as the second fiber cloth) with an organic solvent (acetone, ethanol, etc.) to remove impurities such as polymer resin and oil stains on the surface of the second reinforcing body 221, and then drying.

[0196] S2012 ′, plating a second modified metal layer 222 on the surface of the second reinforcing body 221 .

[0197] Optionally, a layer of nickel or copper is plated on the surface of the second reinforcement body 221 by electroplating, chemical plating, chemical vapor deposition, physical vapor deposition, plasma spraying, sputtering, etc. to form a second modified metal layer 222. This can improve the bonding force between the second reinforcement body 221 and the second metal material, thereby improving the mechanical properties of the connecting portion 20.

[0198] Optionally, the second modified metal layer 222 is formed by electroplating or chemical plating, which can better reduce the cost of the second modified metal layer 222 and make the second modified metal layer 222 have higher quality. The electroplating method is to use the principle of electrolysis to oxidize the anode metal into ions and enter the plating solution under the action of external direct current, and then reduce it at the cathode and precipitate it into a coating. Chemical plating is a method of reducing metal ions in the plating solution into a metal coating with the help of a suitable reducing agent using an oxidation-reduction reaction in the absence of an external current. The nickel or copper coating is tightly bonded to the carbon fiber through a Ni-CO bond or a Cu-CO bond.

[0199] It can be understood that the second modified metal layer 222 may include but is not limited to at least one of nickel and copper.

[0200] For detailed description of other aspects of the second modified metal layer 222 , please refer to the description of the corresponding parts of the above embodiment, which will not be repeated here.

[0201] When the second metal material is aluminum alloy, the second fiber cloth is carbon fiber cloth, and the short fiber is short carbon fiber, since the wettability of carbon fiber and aluminum is poor, nickel or copper plating on the surface of the carbon fiber can improve the wettability of carbon fiber and aluminum; in addition, when the second metal material is composited with the second reinforcing material 22', the carbon fiber is easy to react with aluminum to generate a hard and brittle phase Al 4 C 3 , resulting in a decrease in bonding strength; Ni can react with aluminum to form Al 3 N 4 Wrapped on the surface of carbon fiber, Cu can react with aluminum to form CuAl2 and Cu 9 Al 4 phase, thereby suppressing the Al 4 C 3 Phase generation.

[0202] In some embodiments, the first metal material is a first metal foil, the second metal material is a second metal foil, the first reinforcement material 12' is a first reinforcement layer 12, and the second reinforcement material 22' is a second reinforcement layer 22; in S202, the first metal material, the second metal material, the first reinforcement material 12' and the second reinforcement material 22' are laid to form a stack, including:

[0203] The first metal foil and the first reinforcement layer 12 are alternately stacked in sequence to form the first part, and the second metal foil and the second reinforcement layer 22 are alternately stacked in sequence to form the second part, to obtain a stacked body, wherein the volume fraction of the first reinforcement material 12' in the first part ranges from 10 vol% to 60 vol%; and the volume fraction of the second reinforcement material 22' in the second part ranges from 0 to 10 vol%. In this embodiment, the first metal foil, the second metal foil, the first reinforcement layer 12 and the second reinforcement layer 22 are stacked, so that the preparation process of the battery compartment 100 can be simplified, the preparation time of the battery compartment 100 can be shortened, and the cost of the battery compartment 100 can be reduced.

[0204] Optionally, a hot pressing mold is provided, and a layer of a first metal foil and a second metal foil are first arranged at the bottom of the hot pressing mold (the second metal foil is a hollow structure, and the second metal foil is arranged around the periphery of the first metal foil), and then a first reinforcement layer 12 is arranged on the first metal foil, and a second reinforcement layer 22 is arranged on the second metal foil, and then another layer of the first metal foil is arranged on the first reinforcement layer 12, and another layer of the second metal foil is arranged on the second reinforcement layer 22. Repeat the above steps as needed, and continue to place more layers of the first reinforcement layer 12 and the second reinforcement layer 22, and the first metal foil and the second metal foil. It is required that the upper and lower outer surfaces are the first metal foil or the second metal foil, and the first reinforcement layer 12 and the second reinforcement layer 22 are located in the middle.

[0205] In a specific example, the first metal foil and the second metal foil are both aluminum layers, the first reinforcement layer 12 is a continuous carbon fiber cloth, and the second reinforcement layer 22 is a discontinuous carbon fiber cloth, then a hot pressing mold is provided, and aluminum layers and continuous carbon fiber cloths are alternately arranged at the bottom of the hot pressing mold to form the first part, and aluminum layers and discontinuous carbon fiber cloths are alternately arranged to form the second layer. Repeat the alternating arrangement until a preset stacking structure is reached, requiring the upper and lower outer surfaces to be aluminum layers, and the continuous carbon fiber cloth and the discontinuous carbon fiber cloth are both located in the middle.

[0206] For detailed description of other aspects such as the first metal foil, the second metal foil, the first reinforcement layer 12, the second reinforcement layer 22, etc., please refer to the description of the corresponding parts of the above embodiments, which will not be repeated here.

[0207] It should be noted that the second metal foil is disposed around the outer periphery of the first metal foil, and the second reinforcement layer 22 is disposed around the outer periphery of the first reinforcement layer 12 .

[0208] Optionally, the volume fraction of the first reinforcing material 12' in the first part may be, but is not limited to, 10vol%, 15vol%, 20vol%, 25vol%, 30vol%, 35vol%, 40vol%, 45vol%, 50vol%, 55vol%, 60vol%, etc. If the volume fraction of the first reinforcing material 12' in the first part is too low, the elastic modulus and strength of the prepared support part 10 are too low and cannot meet the requirements; if the volume fraction of the first reinforcing material 12' in the first part is too high, the pores between the first reinforcing materials 12' increase, the first metal material is insufficient to fill the pores between the first reinforcing materials 12', the bonding force between the first metal material and the first reinforcing material 12' in the support part 10 is insufficient, and more pores remain in the support part 10, which reduces the mechanical properties of the prepared support part 10.

[0209] Optionally, the volume fraction of the second reinforcing material 22' in the second part may be, but is not limited to, 90vol%, 91vol%, 92vol%, 93vol%, 94vol%, 95vol%, 96vol%, 97vol%, 98vol%, 99vol%, 99.5vol%, 99.9vol%, etc. If the volume fraction of the second reinforcing material 22' in the second part is too low, the elongation of the obtained connecting part 20 will be significantly reduced, and it will be difficult to meet the processing requirements of complex structures; if the volume fraction of the second reinforcing material 22' in the second part is too high, the elastic modulus and tensile strength of the obtained connecting part 20 will be too low, which will reduce the service life of the connecting part 20.

[0210] In some other embodiments, the first metal material is a first metal powder, the second metal material is a second metal powder, the first reinforcing material 12' is a first reinforcing layer 12, and the second reinforcing material 22' is a reinforcing powder; the first metal material, the second metal material, the first reinforcing material 12' and the second reinforcing material 22' are laid to form a stack, including:

[0211] S2021, mixing a first metal powder with the first reinforcement layer 12, and mixing a second metal powder with the reinforcement powder;

[0212] Optionally, the first metal powder (such as aluminum alloy powder) and the first reinforcement layer 12 (such as carbon fiber cloth) are ball-milled in a ball mill so that the first metal powder enters the gaps in the first reinforcement layer 12 and a layer of the first metal powder adheres to the surface of the first reinforcement layer 12 (for example, the gaps in the first fiber cloth and a layer of aluminum alloy powder adheres to the surface of the first fiber cloth). The second metal powder (such as aluminum alloy powder) and the reinforcement powder (short carbon fiber) are ball-milled in a ball mill so that the second metal powder and the reinforcement powder are evenly mixed.

[0213] Optionally, the rotation speed of the ball mill is in the range of 10 rpm to 30 rpm. Specifically, the rotation speed of the ball mill can be, but is not limited to, 10 rpm, 12 rpm, 14 rpm, 16 rpm, 18 rpm, 20 rpm, 22 rpm, 24 rpm, 26 rpm, 28 rpm, 30 rpm, etc. If the rotation speed of the ball mill is too low, the mixing is uneven; if the rotation speed of the ball mill is too high, the first reinforcement layer 12 is broken, affecting the reinforcement effect.

[0214] Optionally, the ball milling time ranges from 30 min to 120 min. Specifically, the ball milling time may be, but is not limited to, 30 min, 45 min, 60 min, 75 min, 90 min, 105 min, 120 min, etc. If the ball milling time is too low, the mixing is uneven; if the ball milling time is too high, the first reinforcement layer 12 is broken, affecting the reinforcement effect.

[0215] In some embodiments, the first metal powder is the same as the second metal powder. In other embodiments, the first metal powder is different from the second metal powder. When the first metal powder is the same as the second metal powder, the first reinforcing material 12' is the first fiber cloth, and the second reinforcing material 22' is the second fiber cloth, ball milling can be performed together to shorten the preparation process and preparation time of the battery compartment 100.

[0216] S2022, alternately stacking the first metal powder and the first reinforcement layer 12 in sequence to form a first part, and arranging a mixture of the second metal powder and the reinforcement powder to form a second part, to obtain a stacked body, wherein the volume fraction of the first reinforcement material 12' in the first part ranges from 10 vol% to 60 vol%; the volume fraction of the reinforcement powder in the second part ranges from 0 to 10 vol%.

[0217] Optionally, in a hot pressing mold, a layer of the first metal powder and the first reinforcement layer 12 are alternately laid in sequence to form a first part, and a mixture of the second metal powder and the reinforcement powder is laid to form a second part to obtain a stacked body.

[0218] For detailed descriptions of other aspects of the first metal powder, the first reinforcement layer 12, the second metal powder, and the reinforcement powder, please refer to the descriptions of the corresponding parts of the above embodiments, which will not be repeated here.

[0219] In this embodiment, the battery compartment 100 is prepared using a first metal powder, a second metal powder, a first reinforcement layer 12 and a reinforcement powder. Before stacking, the first metal powder and the first reinforcement layer 12 are first ball-milled and mixed, and the second metal powder and the reinforcement powder are ball-milled and mixed. This allows the first metal material and the first reinforcement material 12', as well as the second metal material and the second reinforcement material 22' in the prepared battery compartment 100 to have better bonding strength, thereby allowing the battery compartment 100 to have better mechanical properties.

[0220] In some embodiments, in S203, the stacked body is hot-pressed to form the first portion to form a support portion 10 and the second portion to form a connection portion 20, thereby obtaining a battery compartment 100, including:

[0221] The battery compartment 100 is obtained by hot pressing at a temperature of 600° C. to 700° C. and a pressure of 10 MPa to 60 MPa, so that the first portion forms a supporting portion 10 and the second portion forms a connecting portion 20 .

[0222] Optionally, the stacked body is connected to the hot pressing mold and placed together in a hot pressing furnace for hot pressing. When the first metal material and the second metal material are both aluminum alloys, the first reinforcing material 12' is carbon fiber cloth, and the second reinforcing material 22' is carbon fiber cloth or short carbon fiber, aluminum melts into aluminum liquid at high temperature, and then under the action of pressure and capillary force, the aluminum liquid penetrates into the pores of the carbon fiber and reacts with the carbon fiber to form a bond.

[0223] Specifically, the temperature of hot pressing can be, but is not limited to, 600°C, 620°C, 640°C, 660°C, 680°C, 700°C, etc. If the temperature of hot pressing is too low, it is difficult for the first metal material to fully form the first metal melt, and the first metal melt and the first reinforcing material 12' cannot fully diffuse, which reduces the bonding strength between the first metal material and the first reinforcing material 12', making it easy for the first metal material and the first reinforcing material 12' to be delaminated (that is, the first metal layer 11 of the support part 10 and the first reinforcing layer 12 are easily delaminated); similarly, the second metal material cannot form sufficient second metal melt, and the second metal melt and the second reinforcing material 22' cannot fully diffuse, which reduces the bonding strength between the second metal material and the second reinforcing material 22', reducing the mechanical properties of the connecting part 20 (in the case of uniform powder dispersion) or the connecting part 20 is prone to delamination (in the case of a stacked structure). If the temperature of hot pressing is too high, it is easy to generate a brittle phase (such as Al 4 C 3), which reduces the bonding force between the first metal material and the first reinforcing material 12' and the bonding force between the second metal material and the second reinforcing material 22', thereby reducing the strength of the supporting portion 10 and the connecting portion 20 of the battery compartment 100; in addition, the first molten metal (such as molten aluminum) and the second molten metal (such as molten aluminum) are easily squeezed into the gap of the mold under pressure, causing aluminum deficiency and other phenomena.

[0224] Further, the temperature of hot pressing ranges from 640° C. to 660° C. Specifically, the temperature of hot pressing may be, but is not limited to, 640° C., 645° C., 650° C., 655° C., 660° C., etc. When the temperature of hot pressing is within this range, the battery compartment 100 that can be manufactured is less likely to be delaminated and less likely to generate a brittle phase, and has better mechanical properties.

[0225] Specifically, the hot pressing pressure may be, but is not limited to, 10MPa, 20MPa, 30MPa, 40MPa, 50MPa, 60MPa, etc. If the hot pressing pressure is too low, it is difficult for the first molten metal to penetrate into the first reinforcing material 12', and it is difficult for the second molten metal to penetrate into the second reinforcing material 22', so that the density of the manufactured battery compartment 100 is reduced, and the mechanical properties of the battery compartment 100 are reduced; if the hot pressing pressure is too high, the requirements for the hot pressing equipment and the hot pressing mold are increased, the service life of the hot pressing mold is reduced, and the preparation cost of the battery compartment 100 is increased.

[0226] Furthermore, the hot pressing pressure ranges from 20 MPa to 40 MPa. When the hot pressing pressure is within this range, the manufactured battery compartment 100 can be made denser and have better mechanical properties, so that the hot pressing mold has a longer service life.

[0227] Optionally, the hot pressing time ranges from 60 min to 180 min. Specifically, the hot pressing time can be, but is not limited to, 60 min, 80 min, 10 min, 120 min, 140 min, 160 min, 180 min, etc. If the hot pressing time is too short, the first metal material and the first reinforcing material 12', and the second metal material and the second reinforcing material 22' have not fully diffused with each other, so that the bonding force between the first metal material and the first reinforcing material 12' and the bonding force between the second metal material and the second reinforcing material 22' of the prepared battery compartment 100 are insufficient, and stratification is likely to occur, thereby reducing the mechanical strength of the battery compartment 100; if the hot pressing time is too long, the preparation cost of the battery compartment 100 is increased. In addition, it is easy to produce brittle phases (such as Al 4 C 3 ), which reduces the strength and elongation of the battery compartment 100.

[0228] Furthermore, the hot pressing time is 90 minutes to 120 minutes. When the hot pressing time is within this range, the density of the battery compartment 100 can be higher, the first metal material and the first reinforcing material 12' of the battery compartment 100 and the second metal material and the second reinforcing material 22' have better bonding force, and the battery compartment 100 has higher mechanical strength.

[0229] Optionally, the air pressure (also known as vacuum pressure) in the hot pressing device ranges from 10 -4 Pa to 10 -2 Pa. Specifically, the air pressure in the hot pressing device may be, but is not limited to, 0.0001Pa, 0.0003Pa, 0.0005Pa, 0.001Pa, 0.003Pa, 0.005Pa, 0.008Pa, 0.01Pa, etc. If the air pressure in the hot pressing device is too low, the requirements for the hot pressing device will increase, and the preparation cost of the battery compartment 100 will increase; if the air pressure in the hot pressing device is too high, the first metal material, the second metal material, the first reinforcing material 12' and the second reinforcing material 22' will be easily oxidized, and the performance of the manufactured battery compartment 100 will be reduced.

[0230] Furthermore, the air pressure (also known as vacuum pressure) in the hot pressing equipment ranges from 10 -3 Pa to 10 -2 This can better reduce the requirements for hot pressing equipment and the preparation cost of the battery compartment 100 ; at the same time, it can better prevent the first metal material, the second metal material, the first reinforcing material 12 ′ and the second reinforcing material 22 ′ from oxidation, thereby improving the mechanical strength and elongation of the battery compartment 100 .

[0231] See also Fig.12 In some embodiments, when at least one of the first metal material and the second metal material is at least one of a 2-series aluminum alloy, a 6-series aluminum alloy, and a 7-series aluminum alloy, the preparation method of the battery compartment 100 of the present application includes:

[0232] S301, providing a first metal material, a second metal material and a first reinforcing material 12';

[0233] S302, laying a first metal material, a second metal material and a first reinforcing material 12' to form a stacked body, wherein the stacked body includes a first portion and a second portion, wherein the second portion surrounds the periphery of the first portion, the first portion includes the first metal material and the first reinforcing material 12', and the second portion includes the second metal material;

[0234] S303, performing hot pressing molding on the stacked body, so that the first portion forms a supporting portion 10 and the second portion forms a connecting portion 20; and

[0235] For a detailed description of S301 to S303 , please refer to the description of the corresponding parts of the above embodiment, which will not be repeated here.

[0236] S304, performing heat treatment to obtain a battery compartment 100, wherein the battery compartment 100 includes a support portion 10 and a connecting portion 20, the connecting portion 20 is connected to the support portion 10 and is arranged around the periphery of the support portion 10, the elastic modulus of the support portion 10 is greater than the elastic modulus of the connecting portion 20, and the elongation of the support portion 10 is less than the elongation of the connecting portion 20.

[0237] In this embodiment, when at least one of the first metal material and the second metal material is at least one of 2 series aluminum alloy, 6 series aluminum alloy, and 7 series aluminum alloy, the mechanical strength and elongation of the battery compartment 100 can be better improved by heat treating the product after hot pressing.

[0238] See also Fig.13 Optionally, the heat treatment comprises:

[0239] S3041, solution treatment is carried out at a temperature of 450°C to 550°C under inert gas protection;

[0240] Optionally, the inert atmosphere may be, but is not limited to, at least one of a nitrogen atmosphere, an argon atmosphere, and the like.

[0241] Specifically, the temperature of the solution treatment may be, but is not limited to, 450°C, 460°C, 470°C, 480°C, 490°C, 500°C, 510°C, 520°C, 530°C, 540°C, 550°C, etc. If the temperature of the solution treatment is too low, the improvement of the strength of the battery compartment 100 is limited; if the temperature of the solution treatment is too high, the grains and precipitated phases in the battery compartment 100 are likely to be too large, which reduces the mechanical strength of the battery compartment 100, increases the brittleness of the battery compartment 100, and reduces the elongation.

[0242] Optionally, the time of the solution treatment ranges from 30 min to 60 min. Specifically, the time of the solution treatment can be, but is not limited to, 30 min, 35 min, 40 min, 45 min, 50 min, 45 min, 60 min, etc.

[0243] S3042, quenching; and

[0244] Optionally, quenching is performed in water at room temperature.

[0245] S3043, aging treatment is performed at a temperature of 120°C to 190°C.

[0246] Specifically, the aging treatment temperature may be, but is not limited to, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, etc. If the aging treatment temperature is too low, under-aging will occur, and the improvement of the strength of the battery compartment 100 will not be obvious; if the aging treatment temperature is too high, over-aging will occur, and the mechanical strength of the battery compartment 100 will be reduced.

[0247] Optionally, the aging treatment time is 5 hours to 24 hours. Specifically, the aging treatment time can be, but is not limited to, 5 hours, 8 hours, 10 hours, 13 hours, 15 hours, 18 hours, 20 hours, 22 hours, 24 hours, etc.

[0248] In some embodiments, the preparation method further includes: leveling, surface grinding (to remove protrusions and pits on the surface), and machining the connection portion 20 .

[0249] The battery compartment 100 of the present application is further described below through specific embodiments.

[0250] Example 1

[0251] The battery compartment 100 of this embodiment is prepared by the following steps:

[0252] (1) providing T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth (i.e., first fiber cloth, first reinforcement body 121), T-type polyacrylonitrile-based discontinuous carbon fiber (i.e., T-type polyacrylonitrile-based short carbon fiber, second reinforcement body 221), and 6063 aluminum powder (the first metal powder and the second metal powder are both aluminum powder), wherein the diameter of the fiber filament of the T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth is 7 μm, and the number of fiber filaments in the fiber bundle is 6K; the diameter of the short carbon fiber is 7 μm, and the length is 100 μm; the median particle size of the aluminum powder is 12 μm, and it is nearly spherical;

[0253] (2) a copper layer (a first modified metal layer 122, with a thickness of 100 nm) is plated on the surface of a T-shaped polyacrylonitrile-based unidirectional continuous carbon fiber cloth, and a copper layer (a second modified metal layer 222, with a thickness of 100 nm) is plated on the surface of a T-shaped polyacrylonitrile-based discontinuous carbon fiber;

[0254] (3) T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth and part of aluminum powder, short carbon fiber and another part of aluminum powder were respectively ball-milled and mixed in a ball mill, the ball milling time was 60 min, and the ball milling speed was 20 rpm;

[0255] (4) Alternately stacking aluminum powder and T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth in a hot pressing mold to form a first part, and setting a mixture of aluminum powder and short carbon fibers to form a second part to obtain a stacked body, wherein the stacked body includes a first part and a second part, the second part is arranged around the periphery of the first part, the volume fraction of the T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth in the first part is in the range of 40 vol%, and the volume fraction of the aluminum powder is 60 vol%; the volume fraction of the short carbon fibers in the second part is in the range of 8 vol%, and the volume fraction of the aluminum powder is 92 vol%;

[0256] (5) The hot pressing mold with the stacked body was placed in a hot pressing device at a temperature of 650°C, a pressure of 30 MPa, and an air pressure of 10 -3 Pa, and the hot pressing time is 100 min, so that the first part forms the supporting part 10 and the second part forms the connecting part 20; and

[0257] (6) Solution treatment is performed at a temperature of 520° C. for 60 min, quenching is performed in water at room temperature, and aging treatment is performed at a temperature of 180° C. for 16 h to obtain a battery compartment 100.

[0258] The microscopic image of the battery compartment 100 prepared in this embodiment is as follows: Fig.14 shown. Fig.14 (a) is a microscope image of the connection portion 20, and (b) is a microscope image of the support portion 10.

[0259] Example 2

[0260] The battery compartment 100 of this embodiment is prepared by the following steps:

[0261] (1) providing two layers of asphalt-based unidirectional continuous carbon fiber cloth (i.e., first fiber cloth, first reinforcing body 121), one layer of asphalt-based discontinuous carbon fiber cloth (i.e., second fiber cloth, second reinforcing body 221), three layers of first metal foil (1020 aluminum foil), and two layers of second metal foil (1020 aluminum foil), wherein the diameter of the fiber filaments of the asphalt-based unidirectional continuous carbon fiber cloth is 12 μm, the number of fiber filaments in the fiber bundle is 6K, the thickness of each layer of the asphalt-based unidirectional continuous carbon fiber cloth is 0.05 mm, and the surface density is 40 g / m 2 ; The fiber filaments of the asphalt-based non-continuous carbon fiber cloth have a diameter of 12 μm and a length of 80 μm, and the thickness of each layer of the asphalt-based non-continuous carbon fiber cloth is 0.03 mm; the thickness of the first metal foil is 0.05 mm, and the thickness of the second metal foil is 0.12 mm;

[0262] (2) plating a nickel layer on the surface of the asphalt-based unidirectional continuous carbon fiber cloth (a first modified metal layer 122, with a thickness of 80 nm), and plating a nickel layer on the surface of the asphalt-based discontinuous carbon fiber cloth (a second modified metal layer 222, with a thickness of 80 nm);

[0263] (3) three layers of first metal foil and two layers of asphalt-based unidirectional continuous carbon fiber cloth (wherein the angle between the extension directions of the fiber bundles of the two layers of asphalt-based unidirectional continuous carbon fiber cloth is 90°) are alternately stacked in sequence to form a first part, and two layers of second metal foil and one layer of asphalt-based discontinuous carbon fiber cloth are alternately stacked in sequence to form a second part, to obtain a stacked body, wherein the stacked body includes a first part and a second part, and the second part is arranged around the periphery of the first part; the volume fraction of the asphalt-based unidirectional continuous carbon fiber cloth in the first part is in the range of 35 vol%, and the volume fraction of the first metal foil is 75 vol%; the volume fraction of the asphalt-based discontinuous carbon fiber cloth in the second part is in the range of 7 vol%, and the volume fraction of the second metal foil is 93 vol%;

[0264] (4) The hot pressing mold with the stacked body was placed in a hot pressing device at a temperature of 660°C, a pressure of 40 MPa, and an air pressure of 10 -3 The battery compartment 100 is formed by hot pressing under the temperature of 4000 nm and the hot pressing time is 120 min, so that the first part forms the supporting part 10 and the second part forms the connecting part 20 .

[0265] Example 3

[0266] The battery compartment 100 of this embodiment is prepared by the following steps:

[0267] (1) providing T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth (i.e., the first fiber cloth, the first reinforcement body 121), T-type polyacrylonitrile-based discontinuous carbon fiber (i.e., T-type polyacrylonitrile-based short carbon fiber, the second reinforcement body 221), and 7075 aluminum powder (the first metal powder and the second metal powder are both aluminum powder), wherein the diameter of the fiber filament of the T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth is 7 μm, and the number of fiber filaments in the fiber bundle is 6K; the diameter of the short carbon fiber is 7 μm, and the length is 100 μm; the median particle size of the aluminum powder is 14 μm, and it is nearly spherical;

[0268] (2) a copper layer (a first modified metal layer 122, with a thickness of 100 nm) is plated on the surface of a T-shaped polyacrylonitrile-based unidirectional continuous carbon fiber cloth, and a copper layer (a second modified metal layer 222, with a thickness of 100 nm) is plated on the surface of a T-shaped polyacrylonitrile-based discontinuous carbon fiber;

[0269] (3) T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth and part of aluminum powder, short carbon fiber and another part of aluminum powder were respectively ball-milled and mixed in a ball mill, the ball milling time was 60 min, and the ball milling speed was 20 rpm;

[0270] (4) Alternately stacking aluminum powder and T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth in a hot pressing mold to form a first part, and stacking a mixture of aluminum powder and short carbon fibers to form a second part to obtain a stacked body, wherein the stacked body includes a first part and a second part, the second part is arranged around the periphery of the first part, the volume fraction of the T-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth in the first part is in the range of 40 vol%, and the volume fraction of the aluminum powder is 60 vol%; the volume fraction of the short carbon fibers in the second part is in the range of 0.1 vol%, and the volume fraction of the aluminum powder is 99.9 vol%;

[0271] (5) The hot pressing mold with the stacked body was placed in a hot pressing device at a temperature of 640°C, a pressure of 35 MPa, and an air pressure of 10 -3 Pa, and the hot pressing time is 100 min, so that the first part forms the supporting part 10 and the second part forms the connecting part 20; and

[0272] (6) Solution treatment is performed at a temperature of 470° C. for 60 minutes, quenching is performed in water at room temperature, and aging treatment is performed at a temperature of 120° C. for 18 hours to obtain a battery compartment 100.

[0273] Example 4

[0274] The battery compartment 100 of this embodiment is prepared by the following steps:

[0275] (1) providing three layers of M-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth (i.e., first fiber cloth, first reinforcement body 121), four layers of first metal foil (1020 aluminum foil), and one layer of second metal foil (6061 aluminum foil), wherein the diameter of the fiber filaments of the M-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth is 7 μm, the number of fiber filaments in the fiber bundle is 3K, the thickness of each layer of the M-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth is 0.04 mm, and the surface density is 30 g / m 2 ; The fiber filaments of the asphalt-based non-continuous carbon fiber cloth have a diameter of 12 μm and a length of 80 μm, and the thickness of each layer of the asphalt-based non-continuous carbon fiber cloth is 0.03 mm; the thickness of the first metal foil is 0.04 mm, and the thickness of the second metal foil is 0.25 mm;

[0276] (2) plating a copper layer (first modified metal layer 122, thickness 100 nm) on the surface of the M-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth;

[0277] (3) four layers of the first metal foil and three layers of the M-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth are alternately stacked in sequence to form a first part, and the second metal foil is used as the second part to obtain a stacked body, wherein the stacked body includes the first part and the second part, and the second part is arranged around the periphery of the first part; the volume fraction of the M-type polyacrylonitrile-based unidirectional continuous carbon fiber cloth in the first part is in the range of 33 vol%, and the volume fraction of the first metal foil is 67 vol%;

[0278] (4) The hot pressing mold with the stacked body was placed in a hot pressing device at a temperature of 670°C, a pressure of 25 MPa, and an air pressure of 10 -3 Pa, and the hot pressing time is 80 minutes, so that the first part forms the supporting part 10 and the second part forms the connecting part 20;

[0279] (5) Solution treatment is performed at a temperature of 520° C. for 60 min, quenching is performed in room temperature water, and aging treatment is performed at a temperature of 180° C. for 16 h to obtain a battery compartment 100.

[0280] Example 5

[0281] The battery compartment 100 of this embodiment is prepared by the following steps:

[0282] (1) providing asphalt-based bidirectional continuous carbon fiber cloth (i.e., first fiber cloth, first reinforcement body 121) and 2024 aluminum powder (the first metal powder and the second metal powder are both aluminum powder), wherein the asphalt-based bidirectional continuous carbon fiber cloth is plain woven, the diameter of the fiber filaments of the asphalt-based bidirectional continuous carbon fiber cloth is 12 μm, and the number of fiber filaments in the fiber bundle is 6K; the median particle size of the aluminum powder is 10 μm, and the aluminum powder is nearly spherical;

[0283] (2) plating a nickel layer (first modified metal layer 122, thickness 100 nm) on the surface of the asphalt-based bidirectional continuous carbon fiber cloth;

[0284] (3) The asphalt-based bidirectional continuous carbon fiber cloth and part of the aluminum powder were ball-milled in a ball mill for 60 min at a ball mill speed of 20 rpm;

[0285] (4) Alternately stacking aluminum powder and asphalt-based bidirectional continuous carbon fiber cloth in a hot pressing mold to form a first part, and aluminum powder to form a second part, to obtain a stacked body, wherein the stacked body includes the first part and the second part, the second part is arranged around the periphery of the first part, and the volume fraction of the asphalt-based bidirectional continuous carbon fiber cloth in the first part is in the range of 15 vol%, and the volume fraction of the aluminum powder is 85 vol%;

[0286] (5) The hot pressing mold with the stacked body was placed in a hot pressing device at a temperature of 640°C, a pressure of 45 MPa, and an air pressure of 10 -3Pa, and the hot pressing time is 100 min, so that the first part forms the supporting part 10 and the second part forms the connecting part 20; and

[0287] (6) Solution treatment is performed at a temperature of 540° C. for 60 minutes, quenching is performed in water at room temperature, and aging treatment is performed at a temperature of 180° C. for 2 hours to obtain a battery compartment 100.

[0288] The microscopic image of the battery compartment 100 prepared in this embodiment is as follows: Fig.15 shown. Fig.15 (a) is a microscope image of the connection portion 20, and (b) is a microscope image of the support portion 10.

[0289] The battery compartment 100 prepared in each embodiment was subjected to various performance tests, and the test results are shown in Table 1 below.

[0290] (1) Density measurement: Measure according to the density determination method in Part 1 of GB / T 41079.1-2021 Method for determination of physical properties of liquid metal.

[0291] (2) Measurement of elastic modulus, tensile strength and elongation: Measure in accordance with GB / T228.1-2010 Tensile test for metallic materials Part 1: Room temperature test method.

[0292] (3) Thermal conductivity measurement: Measure thermal diffusivity or thermal conductivity using the flash method specified in GB / T 22588-2008.

[0293] Table 1 Performance parameters of the battery compartment 100 of each embodiment

[0294]

[0295]

[0296] From the test results of the battery compartment 100 of each embodiment from Example 1 to Example 5, it can be seen that the support portion 10 and the connecting portion 20 of the battery compartment 100 of the embodiment of the present application have a lower density; the support portion 10 and the connecting portion 20 have a higher elastic modulus and the elastic modulus of the support portion 10 is greater than the elastic modulus of the connecting portion 20; the support portion 10 and the connecting portion 20 have a higher tensile strength and the tensile strength of the support portion 10 is greater than the tensile strength of the connecting portion 20, which can well support the battery; the support portion 10 has a lower elongation and the connecting portion 20 has a higher elongation, which can better perform mechanical processing of complex structures; the support portion 10 and the connecting portion 20 have a higher thermal conductivity and the thermal conductivity of the support portion 10 is higher than the thermal conductivity of the connecting portion 20, which can better dissipate heat from the battery.

[0297] See also Fig.16 and Fig.17 The embodiment of the present application further provides a middle frame 400, which includes the battery compartment 100, the middle plate 410 and the frame 420 described in the embodiment of the present application, the middle plate 410 is arranged around the periphery of the battery compartment 100, and the middle plate 410 is connected to the connecting portion 20 of the battery compartment 100; the frame 420 is connected to the middle plate 410 by bending, and the frame 420 is arranged around the periphery of the middle plate 410.

[0298] The middle frame 400 of the embodiment of the present application can be applied to electronic devices to support display screens and components of the electronic devices. Optionally, the electronic devices can be, but are not limited to, portable electronic devices such as mobile phones, tablet computers, laptop computers, desktop computers, smart bracelets, smart watches, e-readers, and game consoles.

[0299] It can be understood that the middle plate 410 and the battery compartment 100 enclose a receiving cavity (not shown) to accommodate the battery.

[0300] For detailed description of other aspects of the battery compartment 100, please refer to the description of the corresponding parts of the above embodiment, which will not be repeated here.

[0301] See also Figures 18 to 20 The embodiment of the present application also provides an electronic device 500, which includes a display screen 510, a middle frame 400 described in the embodiment of the present application, and a processor 530, wherein the display screen 510 has a display surface 511; the middle frame 400 is arranged on a side of the display screen 510 away from the display surface 511, and is used to support the display screen 510; the processor 530, the processor 530 is located on a side of the middle frame 400 away from the display screen 510, and the processor 530 is electrically connected to the display screen 510, and is used to control the display screen 510 to display.

[0302] The electronic device 500 of the embodiment of the present application may be, but is not limited to, a portable electronic device 500 such as a mobile phone, a tablet computer, a laptop computer, a desktop computer, a smart bracelet, a smart watch, an e-reader, a game console, etc.

[0303] For a detailed description of the middle frame 400 , please refer to the description of the corresponding part of the above embodiment, which will not be repeated here.

[0304] Optionally, the display screen 510 may be, but is not limited to, one or more of a liquid crystal display screen, a light emitting diode display screen (LED display screen), a micro light emitting diode display screen (Micro LED display screen), a sub-millimeter light emitting diode display screen (Mini LED display screen), an organic light emitting diode display screen (OLED display screen), etc.

[0305] Optionally, the processor 530 includes one or more general-purpose processors, wherein the general-purpose processor can be any type of device capable of processing electronic instructions, including a central processing unit (CPU), a microprocessor, a microcontroller, a main processor, a controller, and an ASIC, etc. The processor 530 is used to execute various types of digital storage instructions, such as software or firmware programs stored in a memory, which enables the computing device to provide a wide variety of services.

[0306] Optionally, the electronic device 500 of the present application further includes a memory 550. The memory 550 is electrically connected to the processor 530 and is used to store program codes required for the processor 530 to run, program codes required for controlling the display screen 510, display content of the display screen 510, and the like.

[0307] Optionally, the memory 550 may include a volatile memory (Volatile Memory), such as a random access memory (Random Access Memory, RAM); the memory 550 may also include a non-volatile memory (NVM), such as a read-only memory (Read-Only Memory, ROM), a flash memory (Flash Memory, FM), a hard disk drive (Hard Disk Drive, HDD) or a solid-state drive (SSD). The memory 550 may also include a combination of the above-mentioned types of memory.

[0308] In some embodiments, the electronic device 500 of the embodiment of the present application further includes a housing 540 and a camera module 570, wherein the housing 540 is disposed on a side of the middle frame 400 away from the display screen 510, and the side of the middle frame 400 is exposed to the housing 540 and the display screen 510. The middle frame 400 and the housing 540 enclose a housing space (not shown), and the housing space is used to accommodate the processor 530, the memory 550 and the camera module 570. The camera module 570 is electrically connected to the processor 530, and is used to shoot under the control of the processor 530.

[0309] Optionally, the housing 540 has a light-transmitting portion 541, and the camera module 570 can shoot through the light-transmitting portion 541 on the housing 540, that is, the camera module 570 in this embodiment is a rear camera module 570. It can be understood that in other embodiments, the light-transmitting portion 541 can be set on the display screen 510, that is, the camera module 570 is a front camera module 570. In the schematic diagram of this embodiment, the light-transmitting portion 541 is illustrated as an opening. In other embodiments, the light-transmitting portion 541 may not be an opening, but a light-transmitting material, such as plastic, glass, etc.

[0310] It can be understood that the electronic device 500 described in this embodiment is merely a form of electronic device 500 used by the middle frame 400, and should not be understood as a limitation on the electronic device 500 provided in this application, nor should it be understood as a limitation on the middle frame 400 provided in each embodiment of this application.

[0311] Mentioning "embodiment" and "implementation method" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrases in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in the various embodiments of the present application can be arbitrarily combined to form another embodiment that does not deviate from the spirit and scope of the technical solution of the present application, if there is no contradiction between them.

[0312] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the above preferred implementation modes, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A battery compartment, characterized in that: The battery compartment comprises: a support portion; and A connecting portion is connected to the supporting portion and is arranged around the outer circumference of the supporting portion, the elastic modulus of the supporting portion is greater than the elastic modulus of the connecting portion, and the elongation of the supporting portion is less than the elongation of the connecting portion.

2. The battery compartment according to claim 1, characterized in that: The thermal conductivity of the support portion is greater than the thermal conductivity of the connection portion, and the tensile strength of the support portion is greater than the tensile strength of the connection portion.

3. The battery compartment according to claim 1, characterized in that: The supporting portion includes a first metal material and a first reinforcing material, and the connecting portion includes a second metal material.

4. The battery compartment according to claim 3, characterized in that: The connecting portion further includes a second reinforcing material, and a volume fraction of the first reinforcing material in the supporting portion is greater than a volume fraction of the second reinforcing material in the connecting portion.

5. The battery compartment according to claim 3, characterized in that: The range of the volume fraction V11 of the first metal material in the support portion is 40 vol%≤V11≤90 vol%, and the range of the volume fraction V12 of the first reinforcement material in the support portion is 10 vol%≤V12≤60 vol%.

6. The battery compartment according to claim 4, characterized in that: The volume fraction V21 of the second metal material in the connection portion is in the range of 90 vol%≤V21≤99.9 vol%, and the volume fraction V22 of the second reinforcement material in the connection portion is in the range of 0.1 vol%≤V22≤10 vol%.

7. The battery compartment according to claim 3, characterized in that: The support portion includes at least two first metal layers and at least one first reinforcement layer, the first metal layers and the first reinforcement layers are alternately stacked in sequence, the first metal layers include a first metal material, and the first reinforcement layer includes a first reinforcement material.

8. The battery compartment according to claim 4, characterized in that: The connecting portion includes at least two second metal layers and at least one second reinforcement layer, the second metal layers and the second reinforcement layers are alternately stacked in sequence, the second metal layers include a second metal material, and the second reinforcement layers include a second reinforcement material; or, The second reinforcement material is dispersed in the second metal material.

9. The battery compartment according to claim 4, characterized in that: The first metal material includes at least one of aluminum, aluminum alloy, magnesium, and magnesium alloy; the first reinforcing material includes at least one of carbon fiber and glass fiber; the second metal material includes at least one of aluminum, aluminum alloy, magnesium, and magnesium alloy; the second reinforcing material includes at least one of carbon fiber and glass fiber.

10. The battery compartment according to claim 4, characterized in that: The first reinforcing material includes a first reinforcing body and a first modified metal layer, and the first modified metal layer is wrapped around the periphery of the first reinforcing body; the second reinforcing material includes a second reinforcing body and a second modified metal layer, and the second modified metal layer is wrapped around the periphery of the second reinforcing body.

11. The battery compartment according to claim 1, characterized in that: The support portion satisfies at least one of the following conditions: The elastic modulus E1 of the support portion is in the range of 110 GPa≤E1≤300 GPa; The tensile strength σ1 of the support portion is in the range of 300MPa≤σ1≤800MPa; The elongation δ1 of the support portion is in the range of 0.1%≤δ1≤2%; The thermal conductivity λ1 of the support portion is in the range of 150 W / m·k≤λ1≤300 W / m·k; and The density ρ1 of the support portion is in the range of 2.5 g / cm 3 ≤ρ1≤2.9g / cm 3 .

12. The battery compartment according to claim 1, characterized in that: The connection portion satisfies at least one of the following conditions: The elastic modulus E2 of the connecting portion is in the range of 65 GPa≤E2≤110 GPa; The tensile strength σ2 of the connecting portion is in the range of 200MPa≤σ2≤600MPa; The elongation δ2 of the connecting portion is in the range of 5%≤δ2≤20%; The thermal conductivity λ2 of the connecting portion is in the range of 100 W / m·k≤λ2≤250 W / m·k; and The density ρ2 of the connecting part is in the range of 2.5 g / cm 3 ≤ρ2≤2.9g / cm 3 .

13. A method for preparing a battery compartment, characterized in that: The preparation method comprises: Providing a first metal material, a second metal material and a first reinforcing material; Laying a first metal material, a second metal material and a first reinforcing material to form a stacked body, wherein the stacked body includes a first portion and a second portion, wherein the second portion surrounds the periphery of the first portion, the first portion includes the first metal material and the first reinforcing material, and the second portion includes the second metal material; and The stacked body is hot-pressed to form the first part so that the first part forms a supporting part and the second part forms a connecting part, thereby obtaining a battery compartment, wherein the battery compartment includes a supporting part and a connecting part, the connecting part is connected to the supporting part and is arranged around the periphery of the supporting part, the elastic modulus of the supporting part is greater than the elastic modulus of the connecting part, and the elongation of the supporting part is less than the elongation of the connecting part.

14. The method for preparing a battery compartment according to claim 13, characterized in that: The preparation method also includes providing a second reinforcing material. The laying of the first metal material, the second metal material and the first reinforcing material to form a stack includes: laying the first metal material, the second metal material, the first reinforcing material and the second reinforcing material to form a stack, and the second part also includes a second reinforcing material.

15. The method for preparing a battery compartment according to claim 14, characterized in that: Providing the first reinforcing material comprises: providing a first enhancement entity; and Plating a first modified metal layer on the surface of the first reinforcement body; Providing the second reinforcement material comprises: providing a second enhancement body; and A second modified metal layer is plated on the surface of the second reinforcement body.

16. The method for preparing a battery compartment according to claim 14, characterized in that: The first metal material is a first metal foil, the second metal material is a second metal foil, the first reinforcement material is a first reinforcement layer, and the second reinforcement material is a second reinforcement layer; The first metal material, the second metal material, the first reinforcing material and the second reinforcing material are laid to form a stack, comprising: The first metal foil and the first reinforcement layer are alternately stacked in sequence to form a first part, and the second metal foil and the second reinforcement layer are alternately stacked in sequence to form a second part, to obtain a stacked body, wherein the volume fraction of the first reinforcement material in the first part ranges from 10 vol% to 60 vol%; the volume fraction of the second reinforcement material in the second part ranges from 0 to 10 vol%.

17. The method for preparing a battery compartment according to claim 14, characterized in that: The first metal material is a first metal powder, the second metal material is a second metal powder, the first reinforcement material is a first reinforcement layer, and the second reinforcement material is a reinforcement powder; the first metal material, the second metal material, the first reinforcement material and the second reinforcement material are laid to form a stacked body, including: mixing a first metal powder with the first reinforcement layer, and mixing a second metal powder with the reinforcement powder; The first metal powder and the first reinforcement layer are alternately stacked in sequence to form a first part, and a mixture of a second metal powder and a reinforcement powder is arranged to form a second part to obtain a stacked body, wherein the volume fraction of the first reinforcement material in the first part ranges from 10 vol% to 60 vol%; the volume fraction of the reinforcement powder in the second part ranges from 0 to 10 vol%.

18. The method for preparing a battery compartment according to claim 13, characterized in that: The stacked body is subjected to hot pressing to form the first part so that the first part forms a supporting part and the second part forms a connecting part, thereby obtaining a battery compartment, comprising: Hot pressing is performed at a temperature of 600° C. to 700° C. and a pressure of 10 MPa to 60 MPa, so that the first part forms a supporting part and the second part forms a connecting part, thereby obtaining a battery compartment.

19. The method for preparing a battery compartment according to any one of claims 13 to 18, characterized in that: After the stack is hot-pressed, the preparation method further comprises: performing heat treatment; The heat treatment comprises: Under the protection of inert gas, solution treatment is performed at a temperature of 450° C. to 550° C.; quenching; and The aging treatment is carried out at a temperature of 120°C to 190°C.

20. A middle frame, characterized in that: The middle frame includes: The battery compartment according to any one of claims 1 to 12; A middle plate, which is disposed around the periphery of the battery compartment and is connected to the connecting portion of the battery compartment; and A frame is connected to the middle plate by bending, and the frame is arranged around the periphery of the middle plate.

21. An electronic device, characterized in that: include: A display screen, wherein the display screen has a display surface; The middle frame of claim 20, wherein the middle frame is arranged on a side of the display screen away from the display surface, and is used to support the display screen; as well as A processor is located on a side of the middle frame away from the display screen, and the processor is electrically connected to the display screen to control the display screen to display.

Images