Battery shell and battery

Abstract

The utility model relates to the technical field of new energy, particularly provides a battery shell and a battery, and aims to solve the problems of connection and sealing among a first shell, a partition plate and a second shell in the prior art. Therefore, the battery shell comprises a first shell body, a second shell body and a partition plate arranged between the first shell body and the second shell body, the first shell body is provided with a frame, the second shell body is provided with a protruding part, and the edge of the partition plate and the protruding part are contained in the frame. The frame is provided with an inner surface, and the end face of the protruding part and the end face of the edge abut against the inner surface and are fixedly connected. The end face of the protruding part and the end face of the edge abut against the inner surface of the frame and are fixedly connected, for example, the end face of the protruding part and the end face of the edge are fixedly connected in a butt seam welding mode, so that stable connection of the protruding part, the edge and the frame is achieved, the sealing effect is guaranteed, and internal electrolyte leakage is prevented.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, specifically providing a battery casing and a battery. Background Technology

[0002] With the depletion of traditional energy sources and the requirements for sustainable development, new energy sources have developed rapidly, including lithium batteries.

[0003] Traditional lithium batteries consist of a casing and a battery cell. The casing is a single-cavity structure, and the battery cell is housed within that single cavity. To improve battery energy density, the casing typically incorporates two independent cavities, each housing a battery cell, maximizing the utilization of the internal space. The dual-cavity casing includes a first shell, a second shell, and a separator between the first and second shells. One cavity is formed between the first shell and the separator, and the other between the second shell and the separator. However, achieving a proper connection and seal between the first shell, the separator, and the second shell remains a critical technical challenge.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems of connection and sealing between the existing first shell, partition and second shell.

[0006] In a first aspect, the present invention provides a battery housing, the battery housing including a first housing, a second housing, and a partition disposed between the first housing and the second housing, the first housing having a frame, the second housing having a protrusion, the edge of the partition and the protrusion being received within the frame, the frame having an inner surface, and the end face of the protrusion and the end face of the edge abutting against the inner surface and being fixedly connected.

[0007] When the above technical solution is adopted, the end face of the protrusion and the end face of the edge abut against the inner surface of the frame and are fixedly connected, such as by using a butt weld or other fixed connection method, so as to achieve a stable connection of the three and ensure a sealing effect to prevent leakage of internal electrolyte.

[0008] In the preferred embodiment of the battery casing described above, the protrusion abuts against the edge.

[0009] In the preferred embodiment of the battery casing described above, the separator is provided with a curved portion, the first end of the curved portion is connected to the edge, and the second end of the curved portion is connected to the separator.

[0010] In the preferred embodiment of the battery casing described above, the partition plate abuts against the bottom surface of the frame.

[0011] In the preferred embodiment of the battery casing described above, the cross-section of the frame is "L" shaped.

[0012] In the preferred embodiment of the battery casing described above, there is a first gap between the edge and the bottom surface of the frame.

[0013] In the preferred embodiment of the battery casing described above, a second gap exists between the protrusion and the separator.

[0014] In the preferred embodiment of the battery casing described above, the end face of the frame and the upper surface of the protrusion are at the same height.

[0015] In the preferred embodiment of the battery casing described above, the cross-section of the curved portion is "S" shaped.

[0016] In a second aspect, the present invention also provides a battery, the battery comprising the aforementioned battery casing. Attached Figure Description

[0017] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a perspective view of the battery casing of this utility model;

[0019] Figure 2 yes Figure 1 The exploded view shown is of the battery casing of this utility model;

[0020] Figure 3 This is a partial cross-sectional view of the battery casing of this utility model;

[0021] Figure 4 yes Figure 3 The image shown is a partial enlarged view of part A of the battery casing of this utility model.

[0022] List of reference numerals in the attached diagram:

[0023] 100. Battery casing; 1. First casing; 11. Frame; 2. Second casing; 21. Protrusion; 3. Divider; 31. Edge; 32. Curved part; 4. First gap; 5. Second gap. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0025] It should be noted that in the description of this utility model, terms such as "inner," "outer," "upper," "lower," "top," "bottom," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, it should be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In one embodiment, such as Figures 1 to 4 As shown, a battery housing 100 of the present invention includes a first housing 1, a second housing 2, and a partition 3 disposed between the first housing 1 and the second housing 2.

[0028] Preferably, the first housing 1 can be a cuboid, a cylinder, or other geometric shapes. Further, the first housing 1 can be made of aluminum, steel, or other materials; no specific limitations are made here.

[0029] More preferably, the second shell 2 can be a cuboid, a cylinder, or other geometric shapes. Furthermore, the second shell 2 can be made of aluminum, steel, or other materials, without specific limitations.

[0030] More preferably, the partition 3 can be rectangular, circular, or other geometric shapes. Furthermore, the partition 3 can be made of aluminum plate, steel plate, or other materials, without specific limitations.

[0031] More preferably, the first housing 1, the separator 3 and the second housing 2 are arranged sequentially along the thickness direction of the battery housing 100, and a closed first cavity is formed between the first housing 1 and the separator 3, and a closed second cavity is formed between the second housing 2 and the separator 3. Each of the first cavity and the second cavity contains a battery cell.

[0032] Furthermore, the first housing 1 has an opening that faces the partition 3, and the partition 3 blocks the opening of the first housing 1 and is fixedly connected to it.

[0033] Furthermore, the second housing 2 has an opening that faces the partition 3, and the partition 3 blocks the opening of the second housing 2 and is fixedly connected to it.

[0034] In one embodiment, the first housing 1 has a frame 11, and the second housing 2 has a protrusion 21. The edge 31 of the partition 3 and the protrusion 21 are received within the frame 11. Figure 3 and Figure 4 As shown.

[0035] Preferably, the frame 11 is arranged around the opening of the first housing 1 to ensure a complete seal of the opening of the first housing 1.

[0036] More preferably, the frame 11 extends from the edge of the opening of the first housing 1 in a direction away from the first housing 1, and then in a direction towards the second housing 2, thereby forming a cavity inside to accommodate the edge 31 and the protrusion 21.

[0037] More preferably, the frame 11 is fixedly connected to the first housing 1, such as by welding, or it can be integrally formed, thereby simplifying the process and improving production efficiency and structural strength.

[0038] More preferably, the protrusion 21 is arranged around the opening of the second housing 2 to ensure a complete seal of the opening of the second housing 2.

[0039] Furthermore, the protrusion 21 extends from the edge of the opening of the second housing 2 in a direction away from the second housing 2. The protrusion 21 is fixedly connected to the second housing 2, such as by welding, or it can be integrally formed, thereby simplifying the process and improving production efficiency and structural strength.

[0040] Furthermore, the edge 31 is housed within the frame 11, and the partition 3 abuts against the inner surface of the frame 11, thereby providing support for the partition 3.

[0041] Furthermore, the protrusion 21 is housed within the frame 11, and the lower surface of the protrusion 21 abuts against the upper surface of the edge 31, thereby providing support for the protrusion 21.

[0042] It should be noted that the protrusion 21 can be fully or partially housed within the frame 11. Users can configure it according to their needs, and no specific limitation is made here.

[0043] In one embodiment, the frame 11 has an inner surface, and the end face of the protrusion 21 and the end face of the edge 31 abut against the inner surface and are fixedly connected, such as... Figure 3 and Figure 4 As shown.

[0044] Preferably, the end face of the protrusion 21 facing the frame 11 abuts against the inner surface, thereby achieving contact between the two, and there is a gap between the end face of the protrusion 21 and the inner surface to facilitate butt welding, thereby achieving a stable connection between the two.

[0045] More preferably, the upper surface of the protrusion 21 is coplanar with the upper surface of the frame 11, which facilitates welding the gap between the two. In other embodiments, the upper surface of the protrusion 21 and the upper surface of the frame 11 may not be coplanar. Users can set it as needed, and no specific limitation is made here.

[0046] Preferably, the end face of edge 31 facing the frame 11 abuts against the inner surface, thereby achieving contact between the two, and there is a gap between the end face of edge 31 and the inner surface to facilitate butt welding and achieve a stable connection between the two.

[0047] It should be noted that the gap between edge 31 and inner surface is located below the gap between end face of protrusion 21 and inner surface, which facilitates welding of both at the same time.

[0048] In one embodiment, the protrusion 21 abuts against the edge 31, such as Figure 3 and Figure 4 As shown.

[0049] Preferably, the lower surface of the protrusion 21 abuts against the upper surface of the edge 31, thereby providing support for the second housing 2 and ensuring the stability of the structure.

[0050] More preferably, the lower surface of the protrusion 21 may partially abut against the edge 31 or may abut against the edge 31 entirely. The user may set it as needed, and no specific limitation is made here.

[0051] More preferably, a portion of the area between the lower surface of the protrusion 21 and the edge 31 may have a gap or may not have a gap. When there is a gap, the gap may be filled with sealant or fixative to further strengthen the stable connection between the two.

[0052] In one embodiment, the partition 3 is provided with a curved portion 32, the first end of the curved portion 32 being connected to the edge 31, and the second end of the curved portion 32 being connected to the partition 3, such as... Figure 3 and Figure 4 As shown.

[0053] Preferably, the curved portion 32 is disposed between the edge 31 and the partition 3 to connect the two. The purpose of the curved portion 32 is to increase the height of the edge 31 to prevent the end face of the edge 31 from abutting the corner inside the frame 11, so that the end face of the edge 31 abuts the inner surface.

[0054] More preferably, the curved portion 32 is arranged around the partition 3, thereby achieving a stable connection between the edge 31 and the partition 3.

[0055] Preferably, the end of the curved portion 32 facing away from the partition plate 3 is fixedly connected to the edge 31, such as by welding or integral molding, so as to achieve a stable connection between the two and improve the stability of the structure.

[0056] More preferably, the end of the bent portion 32 near the partition 3 is fixedly connected to the partition 3, such as by welding or integral molding, so as to achieve a stable connection between the two and improve the structural stability.

[0057] In one embodiment, the partition 3 abuts against the bottom surface of the frame 11, such as... Figure 4 As shown.

[0058] Preferably, a portion of the partition 3 is housed within the frame 11, and the lower surface of the partition 3 abuts against the bottom surface of the inner cavity of the frame 11, thereby providing support for the partition 3 and securing it firmly within the frame 11.

[0059] More preferably, there may be a gap between the lower surface of the partition 3 and the bottom surface of the inner cavity of the frame 11, or there may be no gap. When there is a gap, the gap is filled with sealant or fixing adhesive, thereby enhancing the connection strength between the two.

[0060] In one embodiment, the cross-section of the frame 11 is "L" shaped, such as... Figure 3 and Figure 4 As shown.

[0061] Preferably, the cross-section of the frame 11 is "L" shaped, so that one end of the frame 11 is connected to the edge of the opening of the first housing 1, and the other end extends away from the first housing 1 to form a cavity inside it.

[0062] It should be noted that border 11 can also be other geometric shapes, and users can set it as needed. No specific restrictions are made here.

[0063] In one embodiment, a first gap 4 is provided between the edge 31 and the bottom surface of the frame 11, such as... Figure 4 As shown.

[0064] Preferably, the edge 31 is housed within the frame 11 and is away from the bottom surface of the inner cavity of the frame 11, thereby disengaging from the corner of the frame 11 and ensuring that the end face of the edge 31 fully abuts against the inner surface.

[0065] More preferably, there is a first gap 4 between the edge 31 and the bottom surface of the inner cavity of the frame 11, so as to prevent the end face of the edge 31 from abutting against the corner of the frame 11, affecting the contact area between the two and the effect of subsequent welding and fixing.

[0066] It should be noted that the first gap 4 can be filled with sealant, etc., to enhance the sealing and connection strength between the edge 31 and the frame 11, and ensure the stability of the structure.

[0067] In one embodiment, a second gap 5 exists between the protrusion 21 and the partition 3, such as... Figure 4 As shown.

[0068] Preferably, the lower surface of the protrusion 21 abuts against the upper surface of the edge 31, thereby creating a second gap 5 between the protrusion 21 and the partition 3.

[0069] It should be noted that the second gap 5 mentioned above can be filled with electrolyte or other substances, such as sealant. Users can set it according to their needs, and no specific limitation is made here.

[0070] In one embodiment, the end face of the frame 11 is at the same height as the upper surface of the protrusion 21, such as... Figure 4 As shown.

[0071] Preferably, the end face of the frame 11 is the end face away from the first housing 1. Figure 4 In the middle, the end face of the border 11 is the upper surface of the border 11.

[0072] More preferably, the upper surface of the protrusion 21 is the surface of the protrusion 21 that is away from the edge 31.

[0073] Preferably, the end face of the frame 11 and the upper surface of the protrusion 21 are at the same height, which facilitates welding and fixing of the two, and also improves the overall structural strength and sealing effect.

[0074] In one embodiment, the cross-section of the bent portion 32 is "S" shaped, such as... Figure 4 As shown.

[0075] Preferably, the curved portion 32 is "S" shaped, so that the edge 31 and the partition 3 are at different heights, so that the edge 31 is separated from the corner of the frame 11, and the end face of the edge 31 fully abuts against the inner surface of the frame 31.

[0076] It should be noted that the curved part 32 can also be other shapes, and users can set it according to their needs. No specific limitation is made here.

[0077] In one embodiment, a battery includes the battery casing 100 described in any of the preceding claims.

[0078] Preferably, the battery also includes a cell located between the first housing 1 and the separator 3, and a cell located between the second housing 2 and the separator 3, thereby maximizing the space utilization of the battery housing 100 and increasing the energy density of the battery.

[0079] More preferably, the aforementioned battery cell can be a wound cell or a stacked cell, etc., and the user can set it according to their needs. No specific limitation is made here.

[0080] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0081] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A battery casing, characterized in that, The device includes a first housing, a second housing, and a partition disposed between the first housing and the second housing. The first housing has a frame, and the second housing has a protrusion. The edge of the partition and the protrusion are received within the frame. The frame has an inner surface, and the end face of the protrusion and the end face of the edge abut against the inner surface and are fixedly connected.

2. The battery casing according to claim 1, characterized in that, The protrusion abuts against the edge.

3. The battery casing according to claim 2, characterized in that, The partition has a curved portion, the first end of which is connected to the edge, and the second end of which is connected to the partition.

4. The battery casing according to claim 3, characterized in that, The partition plate abuts against the bottom surface of the frame.

5. The battery casing according to claim 4, characterized in that, The cross-section of the border is "L" shaped.

6. The battery casing according to claim 5, characterized in that, There is a first gap between the edge and the bottom surface of the frame.

7. The battery casing according to claim 6, characterized in that, There is a second gap between the protrusion and the partition.

8. The battery casing according to claim 7, characterized in that, The end face of the frame is at the same height as the upper surface of the protrusion.

9. The battery casing according to claim 8, characterized in that, The cross-section of the curved section is "S" shaped.

10. A battery, characterized in that, The battery casing includes any one of claims 1 to 9.

Images