High-pressure-resistant titanium thin-wall shell, battery shell, battery and pressure-bearing equipment

Abstract

The utility model discloses a high-pressure-resistant titanium thin-wall shell, a battery shell, a battery and pressure-bearing equipment, and relates to the technical field of shells. The laminated area is formed at the opening end of the shell, the thickness of the opening end can be increased, the precision requirement for welding parameters is reduced, meanwhile, the area formed through welding is thick, the phenomenon that micro gaps are generated due to uneven welding is avoided, meanwhile, larger stress can be borne, and the situation that the shell loses efficacy in the using process is avoided. Furthermore, the second laminated surface is folded along the direction far away from the cavity, and the second laminated surface and the first surface are in the same plane, so that the thickness of the opening end of the shell is increased on the premise of not changing the size of the shell, the compression resistance of the shell is enhanced, and the service life of the shell is prolonged. The shell provided by the utility model can be directly applied to the fields of new energy batteries, aerospace, ocean engineering, medical instruments and the like, does not need to redesign structures of related products, and has better adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shells, in particular to a titanium thin-wall shell with high pressure resistance, a battery shell, a battery and a pressure-bearing equipment. BACKGROUND

[0002] Titanium and titanium alloy have become an ideal material for manufacturing protective shells due to their small density, high strength, strong corrosion resistance and other excellent properties. The shell made of titanium or titanium alloy can effectively protect the internal material while significantly reducing the overall weight of the structure. The typical application process includes: after the internal material is loaded into the shell, the cover plate is used for packaging, and then the cover plate and the open end of the shell are firmly connected through welding. Based on the above advantages, titanium and titanium alloy shells have been widely used in fields such as new energy batteries, aerospace, ocean engineering and medical devices, which have extremely high requirements for lightweight, reliability and corrosion resistance.

[0003] In order to ensure lightweight, the protective shell made of titanium and titanium alloy is usually thin, so the parameter precision requirement for welding of the protective shell and the cover plate is extremely high, and slight deviation of the parameter may cause welding defects, thereby affecting the protection of the internal material; and due to the thinness of the protective shell, uneven welds may occur during welding, resulting in micro cracks, or the structure strength of the welding joint is insufficient, and long-term internal stress may cause deformation or cracks and other defects. These defects may significantly reduce the service life and safety performance of the container in high pressure and high reliability application scenarios.

[0004] In addition, the connection part of the protective shell and the cover plate is also subjected to multiple stress actions, for example, the geometric shape mutation of the connection part of the protective shell and the cover plate may easily cause stress concentration; the protective shell and the cover plate as a sealing interface need to withstand internal pressure fluctuations and external loads, in addition to resisting additional stresses such as vibration and thermal expansion.

[0005] The existing protective shell structure design is difficult to effectively cope with these combined stress conditions and welding requirements, especially in extreme working conditions, the thin-wall opening is easy to become the starting point of structural failure. For example, when the pressure container is over-pressurized, the opening for connection may preferentially explode; in a high-temperature environment, the opening material is prone to creep deformation, resulting in sealing failure. These problems are particularly prominent in high-safety application scenarios, directly restricting the performance improvement and application expansion of titanium alloy containers.

[0006] In view of this, the present application is proposed. UTILITY MODEL CONTENT

[0007] The purpose of the present application is to provide a titanium thin-wall shell with high pressure resistance, a battery shell, a battery and a pressure-bearing equipment.

[0008] The present application is implemented as follows:

[0009] In a first aspect, the application provides a high-pressure-resistant titanium thin-wall shell, comprising at least one wall plate, the wall plate forming a shell with an internal cavity, and the shell comprising at least one open end.

[0010] The at least one wall plate forms a laminated area at the open end of the shell; the surface of the wall plate with the laminated area at a non-laminated area is a first surface; the surface of the laminated area comprises a first bending surface, a first laminated surface, and a second laminated surface, the second laminated surface being folded away from the cavity so that the first laminated surface and the second laminated surface are laminated, the two ends of the first bending surface extending in the bending direction are connected with the first surface and the first laminated surface respectively, and the second laminated surface is in the same plane as the first surface.

[0011] In an optional embodiment, the first bending surface is bent in a direction close to the cavity, and the included angle between the first bending surface and the first surface is a bending angle, the bending angle being a right angle or an obtuse angle.

[0012] In an optional embodiment, the first bending surface is an arc surface.

[0013] In an optional embodiment, each wall plate is provided with a laminated area at the region of the open end.

[0014] In an optional embodiment, the number of open ends is one or two, and when the number of open ends is two, the two open ends are oppositely arranged.

[0015] In an optional embodiment, the shape of the shell comprises any one of a prism or a cylinder; the prism comprises any one of a cuboid, a cube, a pentagonal prism, or a hexagonal prism.

[0016] In an optional embodiment, the number of layers of the first laminated surface is at least one, and when the number of layers of the first laminated surface is multiple, the multiple first laminated surfaces are laminated with the second laminated surface.

[0017] In a second aspect, the application provides a battery shell, comprising a cover and the shell according to any one of the preceding embodiments, the cover being in contact with the open end of the shell and closing the open end.

[0018] In a third aspect, the application provides a battery, comprising the battery shell according to the preceding embodiments.

[0019] In a fourth aspect, the application provides a pressure-bearing device, comprising the shell according to any one of the preceding embodiments; the pressure-bearing device comprises any one of a chemical pressure vessel or a space pressure vessel.

[0020] The application has the following beneficial effects:

[0021] The application provides a high-pressure-resistant titanium material thin-wall shell, a battery shell, a battery and a pressure-bearing equipment, a lamination area is formed at an opening end of the shell, the thickness of the opening end is increased, the precision requirement of welding parameters is reduced, the area formed by welding is thick, the phenomenon of micro-cracks caused by uneven welding is avoided, and greater stress can be borne, and shell failure in use is avoided. Further, the second lamination surface is folded in a direction away from the cavity, and the second lamination surface is in the same plane as the first surface, the thickness of the opening end of the shell is increased without changing the size of the shell, and the pressure resistance of the shell is improved, therefore, the shell can be directly applied to the fields of new energy batteries, aerospace, marine engineering and medical devices, and the structure of the related products does not need to be redesigned, and has good adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 A structural schematic diagram of the high-pressure-resistant titanium material thin-wall shell provided by the first embodiment of the application is shown in the figure.

[0024] Figure 2 A structure of the first embodiment of the application is shown in the figure. Figure 1 An enlarged view of the structure A in the figure.

[0025] Figure 3 A sectional view of the lamination area structure provided by the first embodiment of the application is shown in the figure.

[0026] Figure 4 A partial structure diagram of the battery shell provided by the first embodiment of the application is shown in the figure.

[0027] Figure 5 A structural schematic diagram of the high-pressure-resistant titanium material thin-wall shell provided by the second embodiment of the application is shown in the figure.

[0028] Figure 6 A structural schematic diagram of the high-pressure-resistant titanium material thin-wall shell provided by the third embodiment of the application is shown in the figure.

[0029] Figure 7 A structural schematic diagram of the high-pressure-resistant titanium material thin-wall shell provided by the fourth embodiment of the application is shown in the figure.

[0030] Main component symbol explanation: 100 - shell; 110 - wall plate; 111 - first surface; 112 - first bending surface; 113 - first laminated surface; 114 - second laminated surface; 120 - cavity; 130 - open end; 140 - laminated area; 200 - battery shell; 210 - cover. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] First embodiment

[0033] Please see Figure 1 The present embodiment provides a high-pressure-resistant titanium thin-wall shell 100, which includes four wall plates 110. The shape of the shell 100 surrounded by the four wall plates 110 is a cuboid, and the shell 100 has a cavity 120 inside for accommodating materials that need to be protected. For example, the shell 100 provided in the present embodiment is used to make a battery shell 200 (as shown in Figure 4 The cavity 120 is used to accommodate battery materials such as electrodes.

[0034] In other embodiments, when the shell 100 is used as a chemical storage tank or other structure, the cavity 120 inside the shell 100 is used to accommodate corresponding chemical materials.

[0035] In the present embodiment, the shell 100 has two open ends 130. In the structure as shown in Figure 1 The two open ends 130 are located at the upper and lower parts of the shell 100, respectively. The open ends 130 are beneficial for loading the materials that need to be protected into the shell 100. After loading, the open ends 130 are sealed by using a cover plate.

[0036] In the present embodiment, the four wall plates 110 form laminated areas 140 at the upper and lower open ends 130 of the shell 100. That is, as shown in Figure 1 Each wall plate 110 has laminated areas 140 at the upper and lower ends.

[0037] The four wall plates 110 in the present embodiment have the same structure, only different positions and / or sizes. Therefore, the structure of a single wall plate 110 is taken as an example for description.

[0038] Each wall plate 110 in the present embodiment has a laminated area 140 at the upper end and a laminated area 140 at the lower end. Figure 1The wall plate 110 is provided with a first surface 111, a first bending surface 112, a first laminated surface 113 and a second laminated surface 114 in sequence from top to bottom (or from left to right) in the direction of the arrow. The first laminated surface 113 and the second laminated surface 114 are laminated, the first bending surface 112 extends in the direction of the arrow, and the second laminated surface 114 is in the same plane as the first surface 111. Figure 1 The wall plate 110 is provided with a first surface 111, a first bending surface 112, a first laminated surface 113 and a second laminated surface 114 in sequence from top to bottom (or from left to right) in the direction of the arrow. The first laminated surface 113 and the second laminated surface 114 are laminated, the first bending surface 112 extends in the direction of the arrow, and the second laminated surface 114 is in the same plane as the first surface 111.

[0039] As shown in FIG. 1, FIG. 2 and FIG. 3, the first surface 111, the first bending surface 112, the first laminated surface 113 and the second laminated surface 114 are arranged in sequence from top to bottom (or from left to right) in the direction of the arrow. Figure 2 The first laminated surface 113 and the second laminated surface 114 are laminated, the first bending surface 112 extends in the direction of the arrow, and the second laminated surface 114 is in the same plane as the first surface 111. Figure 3 The first laminated surface 113 and the second laminated surface 114 are laminated, the first bending surface 112 extends in the direction of the arrow, and the second laminated surface 114 is in the same plane as the first surface 111.

[0040] By forming the laminated area 140 at the opening end 130 of the shell 100, the thickness of the opening end 130 can be increased, the precision requirement of the welding parameters can be reduced, the area formed by welding is relatively thick, and the phenomenon of micro-cracks caused by uneven welding can be avoided. At the same time, the shell 100 can withstand greater stress and avoid failure during use. Further, by folding the second laminated surface 114 in the direction away from the cavity 120 and making the second laminated surface 114 in the same plane as the first surface 111, the thickness of the opening end 130 of the shell 100 is increased without changing the size of the shell 100, thereby enhancing the pressure resistance of the shell 100. Therefore, the shell 100 provided by the present application can be directly applied to the fields of new energy batteries, aerospace, marine engineering and medical devices, without the need to redesign the structure of related products, and has good adaptability.

[0041] It can be understood that the laminated area 140 of the present embodiment has two surfaces, the first laminated surface 113 and the second laminated surface 114, in the thickness direction. Therefore, the thickness of the laminated area 140 of the present embodiment is twice the thickness of the non-laminated area. Assuming that the thickness of the non-laminated area is 0.2 mm, the thickness of the laminated area 140 is 0.4 mm, which significantly improves the welding strength of the opening end 130 of the shell 100.

[0042] Since the laminated area 140 is formed by folding the second laminated surface 114, it can be understood that the thickness of the wall plate 110 corresponding to the first surface 111, the first bending surface 112, the first laminated surface 113 and the second laminated surface 114 is the same.

[0043] In other embodiments, the thickness of the wall plate 110 can be thinned at the second laminated surface 114 and / or the first laminated surface 113 to satisfy the condition that the first laminated surface 113 is laminated and bent.

[0044] Further, in the embodiment, the first bending surface 112 is arranged in a direction close to the cavity 120, and the first bending surface 112 and the first surface 111 form an obtuse angle α. In other embodiments, the angle α can also be a right angle, and / or the first bending surface 112 is an arc surface, so as to reduce the stress concentration of the shell 100 and improve the fatigue life of the material.

[0045] By controlling the thickness of the wall plate 110 and the angle of the bending angle α, it can be ensured that the second folding surface can be located in the same plane as the first surface 111 after folding, so that the size of the shell 100 provided in the embodiment is consistent with the original size (the structure of the single-layer wall plate 110 of the opening end 130).

[0046] If the size of the shell 100 is changed in order to improve the welding performance of the shell 100, the application range will be smaller. For example, the shell 100 of the embodiment is used to prepare a battery shell 200. If the thickness of the wall plate 110 of the opening end 130 is increased in the embodiment, the second layer 114 is directly folded outward, and the first bending surface 112 is not arranged, which will cause the size of the shell 100 at the opening end 130 to increase. The battery shell 200 prepared by the shell 100 with the changed size is difficult to be applied to the electronic product to which it is originally applicable.

[0047] The design of the first bending surface 112 and the outward folding of the second layer 114 can improve the welding performance of the battery shell 200 without changing the size of the battery shell 200, thereby improving the use safety of the battery shell 200.

[0048] Further, the second layer 114 of the embodiment enhances the strength of the opening end 130 of the shell 100 by means of outward folding. Compared with the inward folding mode, the end surface of the second layer 114, i.e., the end not connected with the first layer 113, is avoided from contacting the material to be protected in the inner cavity of the shell 100, so as to avoid the material to be protected from being damaged by the end surface of the second layer 114, which is beneficial to ensure the long-term stable use of the material to be protected.

[0049] Please refer to Figure 4 The embodiment also provides a battery shell 200, which comprises a cover 210 and the shell 100 described above. The cover 210 is in contact with the opening end 130 of the shell 100 and closes the opening end 130.

[0050] The processing mode of the high-pressure-resistant titanium material thin-wall shell 100 provided in the embodiment comprises the following steps:

[0051] First, a Z-shaped fold is processed at the open end 130 of the shell 100, and the Z-shaped fold is folded toward the inside of the shell 100, then a V-shaped fold is processed at the open end 130 of the shell 100, the V-shaped fold is folded toward the outside of the shell 100, and the V-shaped fold is closer to the end surface of the open end 130 of the shell 100 than the Z-shaped fold.

[0052] Second embodiment

[0053] Please refer to Figure 5 , the embodiment provides a high-pressure-resistant titanium material thin-wall shell 100, comprising five wall plates 110, which are Figure 5 the bottom plate at the bottom and the four side plates around the bottom plate, and the five wall plates 110 are integrally formed.

[0054] The shell 100 surrounded by the five wall plates 110 is a cuboid, and has a cavity 120 inside for accommodating materials to be protected.

[0055] In the embodiment, the shell 100 has an open end 130, and in the structure as Figure 5 shown, the open end 130 is located at the upper part of the shell 100. By providing the open end 130, it is beneficial to load the materials to be protected into the shell 100, and after loading, the open end 130 is sealed by a cover plate.

[0056] In the embodiment, the four side plates around the shell 100 form a stacking area 140 at the open end 130 of the upper part of the shell 100.

[0057] The structures of the four side plates around the embodiment are the same, only the positions and / or sizes are different, so the structure of a single side plate is taken as an example for description.

[0058] Each side plate of the embodiment is sequentially provided with a stacking area 140 and a non-stacking area from top to bottom (in the Figure 5 direction). Since the surface of the wall plate 110 at the non-stacking area is the first surface 111, each wall plate 110 of the embodiment is sequentially provided with the stacking area 140 and the first surface 111 from top to bottom (in the Figure 5 direction).

[0059] The structure of each stacking area 140 is the same as that of the first embodiment, and can be referred to the description of the first embodiment. Figures 2-3 As shown in the first embodiment, the surface of each stacking area 140 comprises a first bending surface 112, a first stacking surface 113 and a second stacking surface 114, the second stacking surface 114 is folded away from the cavity 120, so that the first stacking surface 113 and the second stacking surface 114 are stacked, the two sides of the first bending surface 112 extending along the bending direction are connected with the first surface 111 and the first stacking surface 113 respectively, and the second stacking surface 114 is in the same plane as the first surface 111.

[0060] The shell 100 provided by the embodiment has only one side opening which needs to be connected with the cover plate, and thus can be applied to the field of aerospace or medical devices for packaging materials which need to be protected.

[0061] Since the laminated area 140 is formed by folding the second laminated surface 114, it can be understood that the thicknesses of the wall plate 110 corresponding to the first surface 111, the first folding surface 112, the first laminated surface 113 and the second laminated surface 114 are the same.

[0062] Further, in the embodiment, the first folding surface 112 is arranged to be inclined in the direction close to the cavity 120, and the included angle between the first folding surface 112 and the first surface 111 is the folding angle α, which is an obtuse angle.

[0063] Third Embodiment

[0064] Please refer to Figure 6 The embodiment provides a high-pressure-resistant titanium thin-wall shell 100, which includes four wall plates 110, the shape of the shell 100 surrounded by the four wall plates 110 is a cuboid, and the shell 100 has a cavity 120 inside for accommodating materials which need to be protected.

[0065] In the embodiment, the shell 100 has two opening ends 130, and in the structure as shown in Figure 6 The two opening ends 130 are respectively located at the upper and lower parts of the shell 100. The opening ends 130 are beneficial to loading the materials which need to be protected into the shell 100, and after loading, the opening ends 130 are sealed by the cover plate.

[0066] In the embodiment, the four wall plates 110 all have laminated areas 140 at the upper and lower opening ends 130 of the shell 100. That is, as shown in Figure 6 Each of the wall plates 110 has laminated areas 140 at the upper and lower ends.

[0067] Figure 6 In the embodiment, the two wall plates 110 of the short side are only provided with laminated areas 140 at the lower part, and the two wall plates 110 of the long side are provided with laminated areas 140 at the upper and lower ends.

[0068] The structure of each laminated area 140 is the same as that of the first embodiment, and the description of the first embodiment can be referred to. Figures 2-3As shown in the figure, the surface of each layering area 140 comprises a first bending surface 112, a first layering surface 113 and a second layering surface 114, the second layering surface 114 is folded in a direction away from the cavity 120, so that the first layering surface 113 and the second layering surface 114 are arranged in a layering manner, the two sides of the first bending surface 112 extending in the bending direction are connected with the first surface 111 and the first layering surface 113 respectively, and the second layering surface 114 is in the same plane with the first surface 111.

[0069] Since the layering area 140 is formed by folding the second layering surface 114, it can be understood that the thicknesses of the wall plate 110 corresponding to the first surface 111, the first bending surface 112, the first layering surface 113 and the second layering surface 114 are all the same.

[0070] Further, in the embodiment, the first bending surface 112 is arranged in a direction close to the cavity 120, and the included angle between the first bending surface 112 and the first surface 111 is a bending angle α, which is an obtuse angle.

[0071] Fourth embodiment

[0072] Please refer to Figure 7 The embodiment provides a high-pressure-resistant titanium thin-wall shell 100, which comprises a wall plate 110, the shape of the shell 100 surrounded by the wall plate 110 is cylindrical, and the shell 100 has a cavity 120 inside for accommodating materials to be protected.

[0073] In the embodiment, the shell 100 has two open ends 130, as shown in the structure Figure 7 As shown in the structure, the two open ends 130 are located at the upper and lower parts of the shell 100. By arranging the open ends 130, it is beneficial to load the materials to be protected into the shell 100, and after loading, the open ends 130 are sealed by using a cover plate.

[0074] In the embodiment, the wall plate 110 forms a layering area 140 at both the upper and lower open ends 130 of the shell 100.

[0075] The structure of each layering area 140 is the same as that of the first embodiment, and the structure of the layering area 140 can be referred to the description of the first embodiment. Figures 2-3 As shown in the figure, the surface of each layering area 140 comprises a first bending surface 112, a first layering surface 113 and a second layering surface 114, the second layering surface 114 is folded in a direction away from the cavity 120, so that the first layering surface 113 and the second layering surface 114 are arranged in a layering manner, the two sides of the first bending surface 112 extending in the bending direction are connected with the first surface 111 and the first layering surface 113 respectively, and the second layering surface 114 is in the same plane with the first surface 111.

[0076] Since the layering area 140 is formed by folding the second layering surface 114, it can be understood that the thickness of the wall plate 110 corresponding to the first surface 111, the first folding surface 112, the first layering surface 113 and the second layering surface 114 are all the same.

[0077] Further, in the present embodiment, the first folding surface 112 is arranged to be inclined in the direction close to the cavity 120, and the included angle between the first folding surface 112 and the first surface 111 is the folding angle α, which is an obtuse angle.

[0078] The cylindrical high-pressure-resistant titanium thin-wall shell 100 provided by the present embodiment is particularly suitable for use as a chemical pressure vessel, and can avoid defects such as cracks in the welded open end 130.

[0079] The high-pressure-resistant titanium thin-wall shell 100 provided by the above embodiments can be made of pure titanium or titanium alloy.

[0080] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A thin-walled titanium shell resistant to high pressure, characterized in that, The battery shell comprises at least one wall plate, the wall plate encloses the shell, the shell has a cavity inside, and the shell comprises at least one open end; At least one wall plate forms a laminated area at the open end of the shell; the surface of the wall plate with the laminated area at a non-laminated area is a first surface; the surface of the laminated area comprises a first bending surface, a first laminated surface and a second laminated surface, the second laminated surface is folded away from the cavity to make the first laminated surface and the second laminated surface laminated, the two ends of the first bending surface extending in the bending direction are connected with the first surface and the first laminated surface respectively, and the second laminated surface is in the same plane as the first surface.

2. The housing of claim 1, wherein The first bending surface is bent in the direction close to the cavity, and the included angle between the first bending surface and the first surface is a bending angle, the bending angle is a right angle or an obtuse angle.

3. The housing of claim 1, wherein The first bending surface is an arc surface.

4. The housing of claim 1, wherein Each wall plate is provided with the laminated area at the area of the open end.

5. The enclosure of claim 1, wherein, The number of the open ends is one or two, when the number of the open ends is two, the two open ends are oppositely arranged.

6. The enclosure of claim 1, wherein, The shape of the shell comprises any one of a prism or a cylinder; the prism comprises any one of a cuboid, a cube, a five-prism or a six-prism.

7. The housing according to any one of claims 2 to 5, wherein The number of layers of the first laminated surface is at least one, when the number of layers of the first laminated surface is multiple, the multiple first laminated surfaces are laminated with the second laminated surface.

8. A battery case characterized by comprising: The battery shell comprises a cover and the shell according to any one of claims 1-7, the cover is in contact with the open end of the shell and closes the open end.

9. A battery, characterized by The battery shell comprises the battery shell according to claim 8.

10. A pressure containing device, characterized by The battery shell comprises the shell according to any one of claims 1-7; the pressure-bearing equipment comprises any one of a chemical pressure vessel or a space pressure vessel.

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