Battery shell, battery and electric equipment

Abstract

The invention provides a battery shell, a battery and electric equipment, and relates to the technical field of batteries. The battery shell comprises a shell body, a first cover plate and a second cover plate, the shell body is provided with a first opening and a second opening which are oppositely arranged, the shell body comprises an extension part, and the extension part is suitable for being connected with an electric device; the first cover plate is connected with the shell and covers the first opening; the second cover plate is connected with the shell and covers the second opening. According to the invention, the internal space of the shell can be effectively utilized, so that the energy density of the battery is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a battery case, a battery, and an electrical device. Background Art

[0002] A battery is a device that converts chemical energy into electrical energy and is widely used in new energy vehicles, energy storage power stations, 3C products and other fields.

[0003] Batteries are often fixed in the battery compartment of electronic devices through fixed connectors, but it is difficult for fixed connectors to strike a balance between space occupation and connection stability. Summary of the Invention

[0004] In view of the above problems, the embodiments of the present application provide a battery case, a battery, and an electrical device, which can effectively utilize the internal space of the case and thereby improve the energy density of the battery.

[0005] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0006] A first aspect of an embodiment of the present application provides a battery case, comprising:

[0007] a housing having a first opening and a second opening oppositely disposed;

[0008] a first cover plate connected to the housing and covering the first opening;

[0009] a second cover plate connected to the housing and covering the second opening;

[0010] Wherein, the shell includes an extension portion, and the extension portion is suitable for connecting to an electrical device.

[0011] In a possible implementation, the shell includes a frame having the first opening and the second opening opposite to each other, and the extension portion is located at the first opening end and / or the second opening end of the frame.

[0012] In a possible implementation, the frame and the extension portion are integrally formed.

[0013] In a possible implementation, the extension portion is disposed around the circumference of the first opening end, and / or the extension portion is disposed around the circumference of the second opening end.

[0014] In a possible implementation, the extension portion is located at the second open end of the frame body, and the extension portion is suitable for connecting with the second cover plate.

[0015] In a possible implementation manner, the extension portion and the second cover plate are parallel to each other.

[0016] In a possible implementation, in the thickness direction of the second cover plate, the orthographic projection of the extension portion at least partially overlaps with the orthographic projection of the second cover plate.

[0017] In a possible implementation, the extension portion is provided with a first connection hole, the first connection hole is arranged on the extension portion, and the second cover plate is provided with a second connection hole, the second connection hole is arranged corresponding to and connected to the first connection hole.

[0018] In a possible implementation, in the thickness direction of the second cover plate, an edge of an orthographic projection of the second cover plate is located inside the orthographic projection of the extension portion.

[0019] In a possible implementation, the extension portion is provided with a first connection hole.

[0020] In a possible implementation, the extension portion further includes an accommodating space, the accommodating space extends toward the first cover plate and communicates with the second opening;

[0021] The second cover plate is disposed in the accommodating space and is fixedly connected to the extension portion.

[0022] In a possible implementation, a dimension of the accommodating space along a thickness direction of the second cover plate is greater than or equal to the thickness of the second cover plate.

[0023] In a possible implementation, the thickness of the extension portion is greater than or equal to 0.1 mm.

[0024] In a possible implementation, the thickness of the first cover plate is less than or equal to the thickness of the housing;

[0025] And / or, the ratio of the thickness of the shell to the thickness of the first cover plate is (1.1-4):1.

[0026] In a possible implementation, a circular arc transition is formed between the extension portion and the frame, and the radius of the circular arc is 0.05 mm to 0.5 mm.

[0027] In a possible implementation, an angle is defined between the first cover plate and the housing, and the angle is a right angle.

[0028] In a possible implementation, the thickness of the second cover plate is less than or equal to the thickness of the housing;

[0029] And / or, the ratio of the thickness of the shell to the thickness of the second cover plate is (1-4):1.

[0030] In a possible implementation, the thickness of the second cover plate is equal to the thickness of the first cover plate.

[0031] In a possible implementation, an orthographic projection of the second cover plate on the first cover plate covers the first cover plate and extends beyond an edge of the first cover plate.

[0032] In a possible implementation, a material of at least one of the housing, the first cover plate, and the second cover plate includes a titanium alloy.

[0033] A second aspect of an embodiment of the present application provides a battery, comprising a battery cell and the battery shell described in the first aspect; the battery cell is arranged in a shell of the battery shell.

[0034] A third aspect of an embodiment of the present application provides an electrical device, comprising an electrical device and the battery described in the second aspect, wherein the battery is fixed to the electrical device via an extension portion and is used to provide electrical energy to the electrical device.

[0035] In a possible implementation, the electrical device further includes a fastener, and the extension portion includes a first connection hole;

[0036] The fastener passes through the first connection hole to connect the battery to the electrical device.

[0037] In a possible implementation, the electrical device further includes a fastener, the extension portion includes a first connection hole, the second cover plate is provided with a second connection hole, and the second connection hole is provided corresponding to and connected to the first connection hole;

[0038] The fastener passes through the first connection hole and the second connection hole to connect the battery to the electrical device.

[0039] In a possible implementation, the battery and the electrical device are connected via the extension portion.

[0040] In the battery case, battery, and electrical device provided in the embodiments of the present application, the battery case includes a housing, a first cover plate, and a second cover plate. The first cover plate, the second cover plate, and the housing are separate structures. As such, the thickness of the housing, the first cover plate, and the second cover plate can be reasonably set to optimize the utilization of the internal space of the battery case and the weight of the battery case, thereby accommodating more cells or cells of larger capacity within the same external dimensions, reducing space waste and thereby increasing the energy density of the battery. An extension portion is provided on the housing, and the battery is fixed to the electrical device via the extension portion, simplifying the processing and molding process.

[0041] In addition, the first cover plate, the second cover plate and the shell are split structures, which can make the size and shape design of the extension more flexible, without having to rely too much on the first cover plate and the second cover plate, so that the extension part can adapt to the installation space of different electrical devices, thereby improving the applicability of the battery shell, and can further improve the energy density of the battery while ensuring the connection stability.

[0042] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the battery case, battery and electrical equipment provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 A three-dimensional diagram of a battery case provided in an embodiment of the present application;

[0045] Figure 2 Schematic diagram of the explosion of the battery shell provided in the embodiment of the present application Figure 1 ;

[0046] Figure 3 A top view of a battery case provided in an embodiment of the present application;

[0047] Figure 4 For the Figure 3 Cross-sectional view in the AA direction;

[0048] Figure 5 Schematic diagram of the interior of the battery case provided in the embodiment of the present application Figure 1 ;

[0049] Figure 6 for Figure 5 A magnified schematic diagram of area B in the middle;

[0050] Figure 7 Schematic diagram of the interior of the battery case provided in the embodiment of the present application Figure 2 ;

[0051] Figure 8 for Figure 7 Enlarged schematic diagram of the middle C area;

[0052] Figure 9 Schematic diagram of the explosion of the battery shell provided in the embodiment of the present application Figure 2 ;

[0053] Figure 10 Schematic diagram of the interior of the battery case provided in the embodiment of the present application Figure 2 ;

[0054] Figure 11 for Figure 10 Enlarged schematic diagram of region D in the middle;

[0055] Figure 12 A schematic diagram of a battery provided in an embodiment of the present application;

[0056] Figure 13 A schematic diagram of an electrical device provided in an embodiment of the present application.

[0057] Description of reference numerals:

[0058] 1000: electrical equipment;

[0059] 100: battery;

[0060] 110: battery case; 111: housing; 112: first cover; 113: second cover; 114: extension; 1141: first connection hole; 1142: accommodating space;

[0061] 120: battery cell;

[0062] 130: injection hole;

[0063] 140: Pole;

[0064] 150: explosion-proof notch;

[0065] 160: seal;

[0066] 200: Electrical devices. DETAILED DESCRIPTION

[0067] As mentioned in the background, the low energy density of batteries in related technologies is a technical problem. The inventors have discovered that this problem arises because the connector and housing are separate components, and the connector is relatively large, resulting in a heavy housing. Furthermore, the housing is typically formed using a stamping process, which results in the sidewalls and bottom walls being of uniform thickness. This increases the overall weight of the housing. Furthermore, the internal dimensions of the housing are typically fixed and cannot be flexibly adjusted to the actual size and layout requirements of the battery cells, resulting in wasted space. Consequently, this reduces the energy density of the battery.

[0068] In response to the above technical problems, the embodiments of the present application provide a battery case, a battery, and an electrical device, wherein the battery case includes a housing, a first cover plate, and a second cover plate. The first cover plate, the second cover plate, and the housing are separate structures. In this way, the thickness of the housing, the first cover plate, and the second cover plate can be reasonably set to optimize the utilization of the internal space of the battery case and the weight of the battery case, thereby accommodating more battery cells or larger capacity battery cells within the same external dimensions, reducing space waste and thereby improving the energy density of the battery. An extension portion is provided on the housing, and the battery is fixed to the electrical device through the extension portion, simplifying the processing and molding process.

[0069] In addition, the first cover plate, the second cover plate and the shell are split structures, which can make the size and shape design of the extension more flexible, without having to rely too much on the first cover plate and the second cover plate, so that the extension part can adapt to the installation space of different electrical devices, thereby increasing the applicability of the battery shell and further improving the energy density of the battery.

[0070] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions 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 making creative work are within the scope of protection of this application.

[0071] Please refer to the attached Figure 1 and attached Figure 2 The present invention provides a battery case as a supporting member for supporting a battery cell. The battery case may be square, cylindrical, or in other polygonal or irregular shapes. The following describes the structure of a square battery case in detail, taking it as an example.

[0072] The battery case 110 includes a housing 111, wherein the housing 111 includes a first opening and a second opening that are oppositely arranged. That is, along the height direction of the housing 111, the first opening and the second opening are oppositely arranged. Figure 2 Taking the shown orientation as an example, the first opening is the bottom opening of the shell 111 , and the second opening is the top opening of the shell 111 .

[0073] The housing 111 includes an extension portion 114, which is suitable for connecting with the electrical device 200 (see the attached Figure 13) connection. It should be understood that the extension portion 114 can be directly connected to the electrical device 200, or can be connected to the electrical device 200 through other components provided on the extension portion 114. Exemplarily, the extension portion 114 is provided with a first connection hole 1141, which is suitable for connecting to the electrical device 200 (the structure of which is shown in the attached Figure 13 In the embodiment, the extension portion 114 and the housing 111 are integrated, which can ensure the connection strength between the housing 111 and the extension portion 114, and further eliminates the need for separate welding of the connection portion, simplifying the processing and forming process.

[0074] The battery case 110 further includes a first cover plate 112, which is connected to the housing 111 and covers the first opening. The battery case 110 further includes a second cover plate 113, which is connected to the housing 111 and covers the second opening. In this way, the housing 111, the first cover plate 112, and the second cover plate 113 can enclose the battery case 110, thereby improving the safety of the battery 100.

[0075] The first cover plate 112 serves as the bottom plate of the battery shell 110 and is a separate component from the shell 111. The second cover plate 113 serves as the top plate of the battery shell 110 and is a separate component from the shell 111.

[0076] The first cover plate 112 and the second cover plate 113 are both separate structures from the shell 111. In this way, the thickness of the shell 111, the first cover plate 112 and the second cover plate 113 can be reasonably set. For example, the thickness of the first cover plate 112 is less than the thickness of the shell 111, and / or the second cover plate 113 is less than the thickness of the shell 111, so as to optimize the utilization rate of the internal space of the battery shell 110 and optimize the weight of the battery shell 110, so as to accommodate more battery cells 120 or battery cells 120 with larger capacity under the same external dimensions, reduce space waste, and thus improve the energy density of the battery 100.

[0077] In addition, the first cover plate 112, the second cover plate 113 and the shell 111 are split structures, which can make the size and shape design of the extension 114 more flexible, without having to rely too much on the first cover plate 112 and the second cover plate 113, so that the extension 114 can adapt to the installation space of different electrical devices 200, thereby improving the applicability of the battery shell.

[0078] Since the extension portion 114 needs to have a certain thickness to ensure structural strength, the extension portion 114 is set separately from the first cover plate 112 and the second cover plate 113. The thickness of the first cover plate 112 or the second cover plate 113 can be thinned to reduce the thickness of the battery shell 110. When the volume of the battery 100 remains unchanged, the space occupied by the battery shell 110 is small and the volume of the battery cell 120 is increased, thereby improving the energy density of the battery 100. At the same time, the thickness of the extension portion 114 will not be affected by the thinning of the first cover plate 112 or the second cover plate 113, thereby ensuring that the structural strength of the extension portion 114 is not affected, thereby improving the stability of the connection between the battery 100 and the electrical device 200.

[0079] In this embodiment, the first cover plate 112, the second cover plate 113, and the housing 111 can all be made of metal, and the specific materials can be the same or different. For example, the first cover plate 112, the second cover plate 113, and the housing 111 are made of the same material. For example, the first cover plate 112, the second cover plate 113, and the housing 111 are all made of stainless steel or titanium alloy.

[0080] Among them, the material of at least one of the shell 111, the first cover plate 112 and the second cover plate 113 includes titanium alloy. For example, the materials of the first cover plate 112, the second cover plate 113 and the shell 111 are all titanium alloy materials, which is beneficial to reducing the weight of the overall structure and has high strength, which is beneficial to improving the drop resistance of the battery 100; and the use of titanium alloy material has little thermal impact on the welding part of the shell 111 during welding processing and is not easy to deform.

[0081] It should be noted that the materials of the first cover plate 112 , the second cover plate 113 and the housing 111 may also be different. For example, a thinner material with better thermal conductivity may be selected to make the first cover plate 112 according to the amount of heat generated by the battery cell 120 .

[0082] In an embodiment of the present application, the shell 111 and the first cover plate 112 may be fixedly connected. For example, the shell 111 and the first cover plate 112 may be fixedly connected by welding. In this way, the connection strength between the shell 111 and the first cover plate 112 may be improved.

[0083] In one possible implementation, the housing 111 includes a frame having a first opening and a second opening disposed opposite to each other, and the extension 114 is located at the first open end and / or the second open end of the frame. In other words, the frame is a cylindrical structure with two open ends. The frame can have a regular shape, for example, a circular cylinder or a square cylinder. The frame can also have an irregular shape, which is not limited in this embodiment.

[0084] It should be noted that, in this embodiment, the first opening end can be understood as the end of the frame body opposite to the first opening, and at the same time, the second opening end can be understood as the end of the frame body opposite to the second opening.

[0085] In this embodiment, the number of extension portions 114 can be one or two. When there is one extension portion 114, the extension portion 114 can be disposed at the first open end of the frame, or at the second open end of the frame. In this way, the position of the extension portion 114 can be appropriately set according to the structure of the electrical device 200, thereby increasing the design flexibility of the extension portion 114.

[0086] When there are two extensions 114, one extension 114 is disposed at the first open end of the frame, and the other extension 114 is disposed at the second open end of the frame. This increases the number of connection points between the battery case 110 and the electrical device 200, thereby enhancing the connection strength between the battery case 110 and the electrical device 200.

[0087] In this embodiment, the frame and the extension 114 can be integrally formed, which can make the connection between the frame and the extension 114 more secure, without additional seams or connection points, thereby significantly improving the strength and stability of the battery shell 110. For example, during the production process of the battery shell 110, a stamping / stretching process is usually used to stamp the sheet material, and the bottom wall of the stamped product is removed to simultaneously form the frame and the extension 114, so that the extension 114 and the frame are integrally formed. On the one hand, it greatly simplifies the production process, shortens the production cycle, and thus improves production efficiency; on the other hand, there are no weak points such as welds or adhesives at the connection between them, so the shell 111 is more sturdy and durable. This design helps to improve the impact resistance and pressure resistance of the battery shell 110, ensuring the safety and reliability of the battery 100 during use.

[0088] Please continue to refer to the attached Figure 2 and attached Figure 3 The extension portion 114 is disposed around the circumference of the first opening, and / or the extension portion 114 is disposed around the circumference of the second opening. Thus, the extension portion 114 has an annular structure, thereby increasing the contact area between the extension portion 114 and the electrical device 200, thereby increasing the connection strength between the extension portion 114 and the electrical device 200.

[0089] It should be understood that the extension portion 114 can be directly connected to the electrical device 200 or indirectly connected to the electrical device 200. For example, the extension portion 114 is located at the second opening of the frame and is suitable for connecting to the second cover plate 113. Furthermore, the connection with the electrical device 200 through the second cover plate 113 optimizes the connection between the battery housing 110 and the electrical device 200.

[0090] Please refer to the attached Figure 5 and attached Figure 6 There is an arc transition between the extension portion 114 and the shell 111, or in other words, there is an arc transition between the extension portion 114 and the frame, and the radius R of the arc is 0.05mm~0.5mm, which ensures that the battery shell 110 occupies a small space while also having high processability.

[0091] The extension 114 is relatively parallel to the second cover plate 113. In other words, the extension 114 extends outward in a direction perpendicular to the axis of the frame, so that the extension 114 is arranged horizontally. This ensures that when the extension 114 is connected to the second cover plate 113, it can be tightly fitted with the second cover plate 113, forming a reliable sealing barrier. This tight fit not only effectively prevents the leakage of harmful substances such as the electrolyte inside the housing, but also significantly improves the protection of the battery 100 from the external environment, such as water and dust.

[0092] In addition, the layout of the first connection hole 1141 of the extension portion 114 can be facilitated, and the first connection hole 1141 can be easily connected to the electrical device 200 through a fastener.

[0093] In this embodiment, the relative positional relationship between the extension portion 114 and the second cover plate 113 can be selected in a variety of ways. In the thickness direction of the second cover plate 113, the orthographic projection of the extension portion 114 at least partially overlaps with the orthographic projection of the second cover plate 113; that is, the edge of the orthographic projection of the second cover plate 113 on the plane where the extension portion 114 lies at least partially overlaps with the orthographic projection of the extension portion 114. This provides a sealed connection between the extension portion 114 and the second cover plate 113, a large contact area, and low welding difficulty.

[0094] In a possible embodiment, in the thickness direction of the second cover plate 113, the orthographic projection of the extension portion 114 completely overlaps with the orthographic projection of the second cover plate 113. In other words, please refer to the attached Figure 7 and attached Figure 8 The second cover plate 113 not only covers the second opening but also covers the entire extension portion 114. This maximizes the contact area between the second cover plate 113 and the extension portion 114, thereby improving the connection strength and sealing between the second cover plate 113 and the housing 111. Furthermore, when the housing 111 is relatively thin, the increased area of ​​the second cover plate 113 can provide the battery case 110 with greater structural strength.

[0095] In this case, the extension portion 114 includes a first connection hole 1141, which is provided on the extension portion 114. The second cover plate 113 is provided with a second connection hole (not shown), which corresponds to and communicates with the first connection hole 1141. This facilitates subsequent connection to the electrical device 200 by sequentially penetrating the first and second connection holes with fasteners. The diameter of the first connection hole 1141 is 1 mm to 2 mm.

[0096] In another possible embodiment, along the thickness direction of the second cover plate 113, the edge of the orthographic projection of the second cover plate 113 is located inside the orthographic projection of the extension portion 114. In other words, the edge of the orthographic projection of the second cover plate 113 on the plane containing the extension portion 114 is located inside the orthographic projection of the extension portion 114; that is, the orthographic projection of the second cover plate 113 partially overlaps with the orthographic projection of the extension portion 114. To facilitate explanation of the interior, the extension portion 114 has an inner edge connected to the frame and an outer edge away from the frame; the edge of the orthographic projection of the second cover plate 113 on the plane containing the extension portion 114 is located between the inner and outer edges of the extension portion 114.

[0097] Please refer to the attached Figure 5 and attached Figure 6 The second cover plate 113 covers the second opening while also covering part of the extension 114. In this way, the area of ​​the second cover plate 113 is reduced while ensuring that the second cover plate 113 and the extension 114 can be connected, thereby reducing the weight of the battery shell 110 and improving the energy density of the battery 100.

[0098] In the embodiment of the present application, there are multiple options for connecting the extension portion 114 and the second cover plate 113. For example, the extension portion 114 and the second cover plate 113 are fixedly connected by welding to improve the connection strength between the extension portion 114 and the second cover plate 113.

[0099] Since the extension portion 114 is not covered by the second cover plate 113 in this embodiment, the extension portion 114 can be directly connected to the electrical device 200. For example, the extension portion 114 includes a first connection hole 1141. This facilitates subsequent connection to the electrical device 200 using a fastener after penetrating the first connection hole 1141, thereby improving the connection convenience between the battery housing 110 and the electrical device 200.

[0100] In the application embodiment, when there are multiple first connection holes 1141, the multiple first connection holes 1141 can be arranged at intervals along the circumference of the extension portion 114. In this way, the connection strength between the battery shell 110 and the electrical device 200 can be maximized.

[0101] In this embodiment, the connection method between the extension portion 114 and the electrical device 200 is not limited to the above description and may also have other structures. For example, the extension portion 114 may be provided with a buckle that extends toward the second cover plate 113. Accordingly, the electrical device 200 is provided with a corresponding engaging hole, and one end of the buckle engages with the engaging hole to achieve the connection between the extension portion 114 and the electrical device 200.

[0102] For another example, the welding area of ​​the extension portion 114 and the electrical device 200 may be welded together to achieve the connection between the battery shell 110 and the electrical device 200 .

[0103] In one possible implementation, please refer to the attached Figure 9 To the attached Figure 11 The extension portion 114 also includes a accommodating space 1142, which extends toward the first cover plate 112 and is connected to the second opening; the second cover plate 113 is arranged in the accommodating space 1142 and is fixedly connected to the extension portion 114, for example, the second cover plate 113 is welded to the inner wall of the accommodating space 1142.

[0104] The accommodating space 1142 provides a stable supporting platform for the second cover 113, so that the second cover 113 can be more firmly connected to the extension 114. This design enhances the overall structural stability of the battery case 110 and improves the deformation resistance of the battery 100 when subjected to external impact or vibration.

[0105] In addition, the close fit between the accommodating space 1142 and the second cover plate 113 helps to form a reliable sealing barrier. Through fixed connection methods such as welding, it can be ensured that there is no gap between the second cover plate 113 and the inner wall of the accommodating space 1142, thereby effectively preventing the leakage of harmful substances such as electrolyte and improving the safety and reliability of the battery 100.

[0106] In this embodiment, the dimension of the accommodation space 1142 along the thickness direction of the second cover plate 113 is greater than or equal to the thickness of the second cover plate 113. This allows the top surface of the second cover plate 113 to be lower than, or flush with, the top surface of the extension portion 114 after welding. This reduces the space occupied by the battery shell 110 in the thickness direction, increases the energy density of the battery 100, and contributes to improving the overall performance of the battery 100. Furthermore, the top surface of the second cover plate 113 being lower than the top surface of the extension portion 114 also gives the battery shell 110 a cleaner and smoother appearance.

[0107] In this embodiment, the thickness of the extension portion 114 and the shell 111 is greater than or equal to 0.1 mm, so as to ensure the lightness of the battery shell 110 while also improving the structural strength of the battery shell 110 .

[0108] It should be understood that, since the housing 111 , the first cover plate 112 and the second cover plate 113 are relatively independent components, the thickness of each of the above components can be reasonably set.

[0109] Exemplarily, the thickness of the first cover plate 112 is less than or equal to the thickness of the housing 111. It should be noted that, in this embodiment, the housing 111 includes a frame and an extension portion 114, and the thickness of the housing 111 is the thickness of the frame.

[0110] The thickness of the first cover plate 112 is equal to the thickness of the housing 111. Alternatively, the thickness of the first cover plate 112 is less than the thickness of the housing 111. For example, the ratio of the thickness of the housing 111 to the thickness of the first cover plate 112 is (1.1-4):1. Exemplarily, the ratio of the thickness of the housing 111 to the thickness of the first cover plate 112 is 1.1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, and 4:1.

[0111] The thickness of the first cover plate 112 is less than that of the housing 111, thereby reducing the space occupied by the battery housing 110 in the thickness direction of the first cover plate 112, thereby providing space for increasing the battery capacity and helping to improve the battery life of the battery 100. In addition, while minimizing the weight of the battery housing 110, this embodiment can also ensure the structural strength of the battery housing 110, making it less prone to breakage or deformation.

[0112] In this embodiment, there is an angle between the first cover plate 112 and the housing 111, and the angle is a right angle. Figure 5 and attached Figure 6 In this way, the arc-shaped corner where the first cover plate 112 and the housing 111 are connected can be avoided, so that the space enclosed by the first cover plate 112 and the housing 111 is more square, thereby increasing the area of ​​the space and reducing unnecessary space waste, making it easier for the space to accommodate larger battery cells 120, thereby improving the energy density of the battery 100.

[0113] In other embodiments, the thickness of the second cover plate 113 is further limited. For example, the thickness of the second cover plate 113 can be limited by the thickness of the housing 111. For example, the thickness of the second cover plate 113 is less than or equal to the thickness of the housing 111. It should be noted that in this embodiment, the housing 111 includes a frame and an extension 114. Here, the thickness of the housing 111 refers to the thickness of the frame.

[0114] In one possible example, the thickness of the second cover plate 113 is equal to the thickness of the housing 111. This ensures the structural strength of the battery housing 110 and prevents damage due to external forces. In another possible example, the thickness of the second cover plate 113 is less than the thickness of the housing 111. This reduces the space occupied by the battery housing 110 in the thickness direction of the first cover plate 112, thereby providing space for increasing the capacity of the battery cells 120 and helping to improve the battery life of the battery 100.

[0115] When the thickness of the second cover plate 113 is smaller than the thickness of the housing 111, the ratio of the thickness of the housing 111 to the thickness of the second cover plate 113 is (1-4): 1. In this way, while minimizing the weight of the battery housing 110, the structural strength of the battery housing 110 can be ensured, making it less prone to breakage or deformation.

[0116] It should be noted that the thickness of the second cover plate 113 can be the same as or different from the thickness of the first cover plate 112. In one example, the thickness of the second cover plate 113 is the same as the thickness of the first cover plate 112, so that the battery case 110 has consistent structural strength in the thickness direction of the upper and lower cover plates, which helps maintain the overall mechanical balance of the battery case 110 and prevents localized strength deficiency or deformation when subjected to external forces.

[0117] It should be noted that the first cover plate 112 and the second cover plate 113 are not only limited in thickness, but also in area.

[0118] For example, the orthographic projection of the second cover plate 113 on the first cover plate 112 covers the first cover plate 112 and extends beyond the edge of the first cover plate 112. In other words, the area of ​​the second cover plate 113 is larger than that of the first cover plate 112. This can increase the contact area between the second cover plate 113 and the housing 111, thereby increasing the connection strength between the second cover plate 113 and the housing 111 and improving the sealing between the second cover plate 113 and the housing 111.

[0119] On the other hand, the embodiment of the present application generally connects the battery shell 110 to the electrical device 200 so that the battery 100 provides power to the electrical device 200. By increasing the area of ​​the second cover 113, this embodiment can more easily adapt to different electrical devices 200.

[0120] The present invention also provides a battery 100 , which includes a battery cell 120 and a battery case 110 as described in any of the above embodiments. The battery cell 120 is disposed in a housing 111 of the battery case 110 .

[0121] Since this embodiment includes the battery case 110 described in any of the above embodiments, the battery 100 has the structure and beneficial effects of the battery case 110 , and this embodiment will not be further described here.

[0122] It should be noted that the number of the battery cells 120 may be one or more, and this embodiment will not further limit this.

[0123] In this embodiment, the battery 100 further includes a liquid injection hole 130 , which is provided on the battery shell 110 and communicates with the inner cavity of the battery shell 110 , so that electrolyte can be easily injected into the inner cavity of the battery shell 110 through the liquid injection hole 130 .

[0124] It should be noted that the battery 100 also includes a seal 160, which is disposed within the injection hole 130 and effectively seals the injection hole 130 to prevent electrolyte leakage from the injection hole. This not only ensures the stability of the electrolyte within the battery 100 but also prevents contamination and damage to the external environment of the battery 100 caused by electrolyte leakage. Furthermore, the seal 160 prevents external air and moisture from entering the battery case 110 through the injection hole 130, reducing the risk of unwanted chemical reactions within the battery 100 and thereby improving the safety and reliability of the battery 100.

[0125] The battery 100 also includes a terminal post 140, which is used to connect to the tab of the battery cell 120 to output electrical energy. It should be noted that in this embodiment, the injection hole 130 and the terminal post 140 are both provided on the housing 111 and located on the same wall of the housing 111, which facilitates the processing of the battery housing 110.

[0126] The second cover plate 113 is also provided with an explosion-proof notch 150. The depth of the explosion-proof notch 150 is less than the thickness of the second cover plate 113. In this way, the area where the explosion-proof notch 150 is located forms a weak area. When the battery cell 120 suffers thermal failure, the air pressure in the battery shell 110 increases, and then the explosion-proof notch 150 explodes to release pressure, thereby improving the safety of the battery 100.

[0127] In this embodiment, there are many options for the shape of the explosion-proof notch 150. For example, the shape of the explosion-proof notch 150 is an arc.

[0128] The embodiment of the present application further provides an electric device 1000 , comprising an electric device 200 and the battery 100 described in the above embodiment. The battery 100 is fixed to the electric device 200 via the extension 114 of the battery shell 110 to provide electric energy to the electric device 200 .

[0129] The electrical device 1000 further includes a fastener (not shown), and the extension portion 114 includes a first connection hole 1141. The fastener passes through the first connection hole 1141 and is fixedly connected to the electrical device 200 to achieve a detachable connection between the battery 100 and the electrical device 200. In this embodiment, the fastener may be a screw or a bolt.

[0130] It should be noted that the connection method between the battery case 110 and the electrical device 200 can be set based on the relative position of the extension 114 and the second cover plate 113. For example, the second cover plate 113 completely covers the extension 114. In this case, the extension 114 includes a first connection hole 1141, and the second cover plate 113 has a second connection hole, which is corresponding to and connected to the first connection hole 1141. The fastener passes through the first connection hole 1141 and the second connection hole to connect the battery 100 to the electrical device 200.

[0131] In an embodiment of the present application, the electrical device 200 can be connected to the extension 114 of the battery shell 110 not only by fasteners, but also by other connection methods. For example, the battery 100 and the electrical device 200 are snap-fitted through the extension 114. It can be understood here that a snap is provided at a position opposite to the extension 114 of the electrical device 200, and the snap can extend toward the extension 114 and snap-fit ​​connected with the extension 114. It can also be understood that the shape of the electrical device 200 is adapted to the shape of the extension 114 to limit the connection. For example, the electrical device 200 is provided with a snap-fit ​​groove, and the extension 114 is inserted into the snap-fit ​​groove for fixation. In addition, it can also be connected by welding, riveting, etc. In this way, not only the convenience and flexibility of installation are improved, but also the cost is reduced, the aesthetics and connection reliability are improved.

[0132] In the embodiments of the present application, the power-consuming device 1000 may be a vehicle. For example, the vehicle may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Accordingly, the power-consuming device 200 may be the vehicle's drive mechanism or the vehicle's control system.

[0133] In addition, the electrical device 1000 may also be other energy storage devices, such as energy storage power stations, mobile phones, portable devices, laptop computers, and wearable devices.

[0134] Since the electric device 1000 in this embodiment includes the battery 100 described in any of the above embodiments, the structure and beneficial effects of the electric device 1000 including the battery 100 will not be further described in this embodiment.

[0135] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0136] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery shell (110), characterized in that: include: A housing (111), wherein the housing (111) has a first opening and a second opening that are arranged opposite to each other; a first cover plate (112), the first cover plate (112) being connected to the housing (111) and covering the first opening; a second cover plate (113), the second cover plate (113) being connected to the housing (111) and covering the second opening; The housing (111) includes an extension portion (114), and the extension portion (114) is suitable for connecting to an electrical device (200).

2. The battery housing (110) according to claim 1, characterized in that The housing (111) comprises a frame having the first opening and the second opening arranged opposite to each other, and the extension portion (114) is located at the first opening end and / or the second opening end of the frame.

3. The battery case (110) according to claim 2, characterized in that: The frame and the extension portion (114) are integrally formed.

4. The battery housing (110) according to claim 2, characterized in that: The extension portion (114) is disposed circumferentially around the first opening end, and / or the extension portion (114) is disposed circumferentially around the second opening end.

5. The battery case (110) according to claim 2, characterized in that: The extension portion (114) is located at the second open end of the frame body, and the extension portion (114) is suitable for connecting with the second cover plate (113).

6. The battery case (110) according to claim 5, characterized in that: The extension portion (114) and the second cover plate (113) are parallel to each other.

7. The battery housing (110) according to claim 5, characterized in that: In the thickness direction of the second cover plate (113), the orthographic projection of the extension portion (114) at least partially overlaps with the orthographic projection of the second cover plate (113).

8. The battery case (110) according to claim 7, characterized in that: The extension portion (114) is provided with a first connection hole (1141), and the second cover plate (113) is provided with a second connection hole, and the second connection hole is correspondingly arranged and communicated with the first connection hole (1141).

9. The battery housing (110) according to claim 7, characterized in that: In the thickness direction of the second cover plate (113), the edge of the orthographic projection of the second cover plate (113) is located inside the orthographic projection of the extension portion (114).

10. The battery housing (110) according to claim 9, characterized in that: The extension portion (114) is provided with a first connection hole (1141).

11. The battery housing (110) according to claim 10, characterized in that: The extension portion (114) further includes an accommodating space (1142), the accommodating space (1142) extending toward the first cover plate (112) and communicating with the second opening; The second cover plate (113) is disposed in the accommodating space (1142) and is fixedly connected to the extension portion (114).

12. The battery housing (110) according to claim 11, characterized in that: The dimension of the accommodating space (1142) along the thickness direction of the second cover plate (113) is greater than or equal to the thickness of the second cover plate (113).

13. The battery housing (110) according to any one of claims 1 to 12, characterized in that: The thickness of the extension portion (114) is greater than or equal to 0.1 mm.

14. The battery housing (110) according to any one of claims 1 to 12, characterized in that: The thickness of the first cover plate (112) is less than or equal to the thickness of the housing (111); And / or, the ratio of the thickness of the shell (111) to the thickness of the first cover plate (112) is (1.1-4):

1.

15. The battery housing (110) according to any one of claims 2 to 12, characterized in that: There is an arc transition between the extension portion (114) and the frame, and the radius of the arc is 0.05mm to 0.5mm.

16. The battery housing (110) according to any one of claims 1 to 12, characterized in that: An included angle is formed between the first cover plate (112) and the housing (111), and the included angle is a right angle.

17. The battery housing (110) according to any one of claims 1 to 12, characterized in that: The thickness of the second cover plate (113) is less than or equal to the thickness of the housing (111); And / or, the ratio of the thickness of the shell (111) to the thickness of the second cover plate (113) is (1-4):

1.

18. The battery housing (110) according to claim 17, characterized in that: The thickness of the second cover plate (113) is equal to the thickness of the first cover plate (112).

19. The battery housing (110) according to any one of claims 1 to 12, characterized in that: The orthographic projection of the second cover plate (113) on the first cover plate (112) covers the first cover plate (112) and extends beyond the edge of the first cover plate (112).

20. The battery housing (110) according to any one of claims 1 to 12, characterized in that: The material of at least one of the housing (111), the first cover plate (112), and the second cover plate (113) includes titanium alloy.

21. A battery (100), characterized in that Comprising a battery cell (120) and a battery shell (110) according to any one of claims 1 to 20; The battery core (120) is arranged in the housing (111) of the battery shell (110).

22. An electrical device (1000), characterized in that: The invention comprises an electric device (200) and the battery (100) according to claim 21, wherein the battery (100) is fixed to the electric device (200) via an extension portion (114) and is used to provide electric energy to the electric device (200).

23. The electrical device (1000) according to claim 22, characterized in that: The electrical device (1000) further includes a fastener, and the extension portion (114) includes a first connection hole (1141); The fastener penetrates the first connection hole (1141) to connect the battery (100) to the electrical device (200).

24. The electrical device (1000) according to claim 22, characterized in that: The electrical device (1000) further comprises a fastener, the extension portion (114) comprises a first connection hole (1141), the second cover plate (113) is provided with a second connection hole, and the second connection hole is correspondingly arranged and communicated with the first connection hole (1141); The fastener penetrates the first connection hole (1141) and the second connection hole to connect the battery (100) to the electrical device (200).

25. The electrical device (1000) according to claim 22, characterized in that: The battery (100) and the electrical device (200) are connected via the extension portion (114).

Images