Battery shell, battery and electronic equipment

Abstract

The utility model discloses a battery shell, a battery and electronic equipment. The battery shell comprises a bottom wall and a side wall, the first end of the side wall is connected with the edge of the bottom wall, and the second end of the side wall is used for being connected with a cover body of a battery; wherein the thickness of the bottom wall is greater than that of the side wall. According to the battery shell provided by the embodiment of the invention, the thickness of the bottom wall is set to be larger, so that the structural strength and the bearing capacity of the bottom wall are improved, and the condition of weld penetration is avoided when the bottom wall and the tab are welded. Meanwhile, the thickness of the side wall is set to be smaller than that of the bottom wall, and the thickness of the side wall is not set to be equal to that of the bottom wall, so that the overall weight of the battery shell is reduced; and the capacity of the battery cell is increased, and the energy density of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage device technology, and more specifically, to a battery casing, a battery, and an electronic device. Background Technology

[0002] With the rapid development of science and technology, batteries, as the main energy supply device for electronic devices, face increasingly higher requirements for performance and safety. As a crucial component of the battery, the battery casing not only needs to provide excellent sealing and protection but also requires a certain level of structural strength to ensure stable and safe operation in complex environments.

[0003] Traditional battery casing designs often employ uniform wall thickness, which, while meeting basic packaging requirements to some extent, often proves insufficient in practical applications, especially in high-energy-density batteries. For example, the bottom of the casing often needs to withstand greater pressure, and because it needs to be welded to the tabs, the bottom requires a larger thickness. However, if the sidewalls of the casing are designed with the same thickness as the bottom, the overall weight of the casing will be too large, which is detrimental to improving the battery's energy density.

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

[0005] One objective of this application is to provide a new technical solution for a battery casing, a battery, and an electronic device.

[0006] According to a first aspect of this application, a battery housing is provided, the battery housing comprising:

[0007] bottom wall;

[0008] The sidewall has a first end connected to the edge of the bottom wall and a second end for connecting to the battery cover.

[0009] The thickness of the bottom wall is greater than the thickness of the side wall.

[0010] Optionally, the thickness of the bottom wall is 1.3 to 3.0 times the thickness of the side wall.

[0011] Optionally, the thickness of the bottom wall is 0.1 to 1 mm, and the thickness of the side wall is 0.05 to 0.5 mm.

[0012] Optionally, the bottom wall includes a bottom wall body and a bottom wall reinforcing plate, the first end of the side wall is connected to the edge of the bottom wall body, and the bottom wall reinforcing plate is connected to the bottom wall body;

[0013] The bottom wall body and the side wall are an integral structure, and the thickness of the bottom wall body is equal to the thickness of the side wall.

[0014] Optionally, the bottom wall body is bonded or welded to the bottom wall reinforcing plate.

[0015] Optionally, the bottom wall and the side wall are an integral structure, and the side wall is stretched to make its thickness less than that of the bottom wall.

[0016] Optionally, the bottom wall and the side wall are an integral structure, and the side wall is ground to make its thickness less than that of the bottom wall.

[0017] According to a second aspect of this application, a battery is provided, the battery including a battery housing as described in the first aspect, a cover and a battery cell, an opening being formed at a second end of a sidewall, the cover being connected to the second end of the sidewall and covering the opening, the battery housing and the cover forming an accommodating space, and the battery cell being disposed within the accommodating space.

[0018] Optionally, the battery further includes a first tab and a second tab, the first tab being led out from the cell and connected to the bottom wall, and the second tab being led out from the cell and connected to the cover.

[0019] According to a third aspect of this application, an electronic device is provided, the electronic device comprising a battery as described in the second aspect.

[0020] In the battery casing provided in this application embodiment, the thickness of the bottom wall is set to be relatively large to improve the structural strength and load-bearing capacity of the bottom wall, and to ensure that no weld burn-through occurs when the bottom wall is welded to the electrode tabs. At the same time, the thickness of the side wall is set to be less than the thickness of the bottom wall, rather than the same as the thickness of the bottom wall. This helps to reduce the overall weight of the battery casing and also helps to increase the capacity of the battery cell and improve the energy density of the battery.

[0021] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0023] Figure 1a This is a cross-sectional view of a battery casing according to an embodiment of this application;

[0024] Figure 1b This is a schematic cross-sectional view of a battery casing according to an embodiment of this application. Figure 2 ;

[0025] Figure 1c This is a cross-sectional view of a battery casing according to an embodiment of this application;

[0026] Figure 2 This is a cross-sectional structural diagram of a battery according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Battery casing; 11. Bottom wall; 111. Bottom wall body; 112. Bottom wall reinforcing plate; 12. Side wall; 120. Opening; 2. Cover; 21. Cover plate; 22. Conductive component; 23. Insulating ring. Detailed Implementation

[0029] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] Reference Figures 1a to 1c As shown, according to one embodiment of this application, a battery housing 1 is provided. The battery housing 1 includes a bottom wall 11 and a side wall 12. A first end of the side wall 12 is connected to the edge of the bottom wall 11, and a second end of the side wall 12 is used to connect to the cover of the battery. The thickness of the bottom wall 11 is greater than the thickness of the side wall 12.

[0035] The battery casing 1 provided in this embodiment includes a bottom wall 11 and a side wall 12. A first end of the side wall 12 is connected to the edge of the bottom wall 11, and a second end of the side wall 12 is connected to the battery cover, forming a closed accommodating space in which the battery cell is placed. The bottom wall 11 supports the battery cell and is welded to a tab extending from the battery cell. Therefore, the thickness of the bottom wall 11 is set to be relatively large to improve its structural strength and load-bearing capacity, and to ensure that no burn-through occurs when the bottom wall 11 is welded to the tab. Meanwhile, the thickness of the side wall 12 is set to be less than the thickness of the bottom wall 11, rather than being the same thickness as the bottom wall 11. This helps to reduce the overall weight of the battery casing 1 and increases the capacity of the battery cell, thereby improving the battery's energy density.

[0036] Reference Figures 1a to 1c As shown, in one embodiment, the thickness of the bottom wall 11 is 1.3 to 3.0 times the thickness of the side wall 12.

[0037] In this specific example, the thickness of the bottom wall 11 can be 1.3 to 3.0 times the thickness of the side wall 12; for example, the thickness of the bottom wall 11 is twice the thickness of the side wall 12. This ensures that the bottom wall 11 and the side wall 12 have sufficient structural strength, and also reduces the weight of the battery casing 1 as much as possible while increasing the capacity of the battery cell.

[0038] Reference Figures 1a to 1c As shown, in one embodiment, the thickness of the bottom wall 11 is 0.1 to 1 mm, and the thickness of the side wall 12 is 0.05 to 0.5 mm.

[0039] In this specific example, the thickness of the bottom wall 11 can be set in the range of 0.1mm to 1mm, while the thickness of the side wall 12 can be set in the range of 0.05mm to 0.5mm. The specific thickness values ​​of the bottom wall 11 and the side wall 12 can be set according to actual needs to meet different application scenarios and performance requirements.

[0040] Reference Figures 1a-1b As shown, in one embodiment, the bottom wall 11 includes a bottom wall body 111 and a bottom wall reinforcing plate 112, the first end of the side wall 12 is connected to the edge of the bottom wall body 111, and the bottom wall reinforcing plate 112 is connected to the bottom wall body 111.

[0041] The bottom wall body 111 and the side wall 12 are integral structures, and the thickness of the bottom wall body 111 is equal to the thickness of the side wall 12.

[0042] In this specific example, the bottom wall 11 consists of two structural parts: a bottom wall body 111 and a bottom wall reinforcing plate 112. The edge of the bottom wall body 111 is connected to the first end of the side wall 12. More specifically, the bottom wall body 111 and the side wall 12 are an integral structure. For example, the bottom wall body 111 and the side wall 12 are formed from a flat plate structure through a bending process, so that the thickness of the bottom wall body 111 is equal to the thickness of the side wall 12. To increase the thickness of the bottom wall 11, a bottom wall reinforcing plate 112 is provided on the bottom wall body 111. Optionally, referring to… Figure 1a As shown, the bottom wall reinforcing plate 112 can be located within the accommodating space formed by the bottom wall body 111 and the side wall 12, that is, the bottom wall reinforcing plate 112 is connected to the inner side of the bottom wall body 111, which can provide better reinforcement to the bottom wall body 111; see reference. Figure 1b As shown, the bottom wall reinforcing plate 112 can also be located outside the accommodating space formed by the bottom wall body 111 and the side wall 12, that is, the bottom wall reinforcing plate 112 is connected to the outside of the bottom wall body 111, so that the space occupied by the battery cell will not be occupied by setting the bottom wall reinforcing plate 112. Optionally, the material of the bottom wall reinforcing plate 112 is the same as the material of the bottom wall body 111.

[0043] Reference Figures 1a-1b As shown, in one embodiment, the bottom wall body 111 is bonded or welded to the bottom wall reinforcing plate 112.

[0044] In this specific example, the bottom wall body 111 and the bottom wall reinforcing plate 112 can be connected by means of bonding or welding to ensure the stability and reliability of the structure.

[0045] Reference Figure 1c As shown, in one embodiment, the bottom wall 11 and the side wall 12 are an integral structure, and the side wall 12 is stretched to make its thickness less than that of the bottom wall 11.

[0046] In this specific example, the bottom wall 11 and the side wall 12 can first be formed from a flat plate structure through a bending process, and then the thickness of the side wall 12 can be reduced through a stretching process. After the stretching process, the length of the side wall 12 will increase. Finally, the length of the side wall 12 can be cut to the required length. This processing method is relatively convenient. It can be understood that the thickness of the flat plate structure is initially determined according to the thickness requirement of the bottom wall 11, so that the battery casing 1 manufactured meets the thickness requirement of the bottom wall 11, and the side wall 12 is correspondingly thinned.

[0047] Reference Figure 1c As shown, in one embodiment, the bottom wall 11 and the side wall 12 are integral structures, and the side wall 12 is ground to make its thickness less than that of the bottom wall 11.

[0048] In this specific example, the bottom wall 11 and the side wall 12 can first be formed from a flat plate structure through a bending process, and then the thickness of the side wall 12 can be reduced through a grinding process; this processing method helps to precisely control the thickness of the side wall 12. It can be understood that the thickness of the flat plate structure is initially determined according to the thickness requirements of the bottom wall 11, so that the manufactured battery casing 1 meets the thickness requirements of the bottom wall 11, and the side wall 12 is correspondingly thinned.

[0049] Reference Figure 2 As shown, according to another embodiment of this application, a battery is provided, the battery including a battery housing 1 as described above, a cover 2 and a battery cell, the second end of the side wall 12 forms an opening 120, the cover 2 is connected to the second end of the side wall 12 and covers the opening 120, the battery housing 1 and the cover 2 enclose a receiving space, and the battery cell is disposed in the receiving space.

[0050] The battery provided in this embodiment includes the battery casing 1, which provides sufficient protection and support for the battery cell, reduces the overall weight, increases the capacity of the battery cell, and improves the energy density of the battery; therefore, the battery has good performance.

[0051] In one embodiment, the battery further includes a first tab and a second tab, the first tab being led out from the cell and connected to the bottom wall 11, and the second tab being led out from the cell and connected to the cover 2.

[0052] In this specific example, a first tab and a second tab are led out from the battery cell, wherein the first tab is connected to the bottom wall 11 and the second tab is connected to the cover 2. Specifically, the cover 2 includes a cover plate 21, a conductive element 22 and an insulating ring 23, the insulating ring 23 being disposed between the cover plate 21 and the conductive element 22; the cover plate 21 is connected to the second end of the side wall 12, and the second tab is connected to the conductive element 22.

[0053] According to another embodiment of this application, an electronic device is provided, the electronic device including the battery as described above.

[0054] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0055] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A battery casing, characterized in that, The battery casing includes: bottom wall(11); Sidewall (12), the first end of which is connected to the edge of the bottom wall (11), and the second end of which is used to connect to the cover of the battery; The thickness of the bottom wall (11) is greater than the thickness of the side wall (12).

2. The battery casing according to claim 1, characterized in that, The thickness of the bottom wall (11) is 1.3 to 3.0 times the thickness of the side wall (12).

3. The battery casing according to claim 2, characterized in that, The thickness of the bottom wall (11) is 0.1 to 1 mm, and the thickness of the side wall (12) is 0.05 to 0.5 mm.

4. The battery casing according to any one of claims 1-3, characterized in that, The bottom wall (11) includes a bottom wall body (111) and a bottom wall reinforcing plate (112). The first end of the side wall (12) is connected to the edge of the bottom wall body (111), and the bottom wall reinforcing plate (112) is connected to the bottom wall body (111). The bottom wall body (111) and the side wall (12) are integral structures, and the thickness of the bottom wall body (111) is equal to the thickness of the side wall (12).

5. The battery casing according to claim 4, characterized in that, The bottom wall body (111) is bonded or welded to the bottom wall reinforcing plate (112).

6. The battery casing according to any one of claims 1-3, characterized in that, The bottom wall (11) and the side wall (12) are an integral structure, and the side wall (12) is stretched to make its thickness less than that of the bottom wall (11).

7. The battery casing according to any one of claims 1-3, characterized in that, The bottom wall (11) and the side wall (12) are an integral structure, and the side wall (12) is ground to make its thickness less than that of the bottom wall (11).

8. A battery, characterized in that, The battery includes a battery housing (1) as described in any one of claims 1-7, and further includes a cover (2) and a battery cell. The second end of the side wall (12) forms an opening (120). The cover (2) is connected to the second end of the side wall (12) and covers the opening (120). The battery housing (1) and the cover (2) enclose a receiving space, and the battery cell is disposed within the receiving space.

9. The battery according to claim 8, characterized in that, The battery also includes a first tab and a second tab, the first tab being led out from the cell and connected to the bottom wall (11), and the second tab being led out from the cell and connected to the cover (2).

10. An electronic device, characterized in that, The electronic device includes a battery as described in any one of claims 8-9.

Images