Battery shell, single battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery shell, a single battery and an electric device. The battery shell comprises an annular side wall and a bottom wall, an opening is formed in one end of the annular side wall in the first direction, the bottom wall is arranged at the other end of the annular side wall, a first reinforcing structure is arranged on the bottom wall, the outer surface of the bottom wall is a first reinforcing face, the inner surface of the bottom wall is a second reinforcing face, and the first reinforcing structure is arranged in a protruding mode in the direction from the first reinforcing face to the second reinforcing face. The first reinforcing structure comprises a first reinforcing rib and a plurality of second reinforcing ribs, and the first reinforcing rib extends in the second direction; the multiple second reinforcing ribs are arranged at intervals, the second reinforcing ribs extend in the third direction and communicate with the first reinforcing ribs, and the first direction, the second direction and the third direction are perpendicular to one another in a pairwise mode. According to the arrangement, the connection strength between the battery shell and the fixing glue is improved, so that the expansion of the battery cell is inhibited, and the safety of the single battery and the electric device is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery casing, a single battery cell, and an electrical device. Background Technology

[0002] With the continuous development of new energy technologies, individual battery cells are also constantly evolving towards higher energy density. However, the higher the energy density, the greater the safety risks associated with the battery. Therefore, the safety of individual battery cells is also an indispensable requirement in their development.

[0003] Currently, with the increasing demand for higher energy density, the size of individual batteries is gradually increasing. Due to the expansion of cells after long-term operation, this expansion, especially in prismatic batteries, primarily occurs along their thickness, causing deformation and potentially leading to short circuits and other safety issues. Therefore, current technologies typically use straps and structural adhesives to secure the batteries during assembly, preventing uncontrolled expansion and safety problems. However, the large size of existing individual batteries and their enlarged casings result in structural weaknesses, making them prone to deformation during transportation. Furthermore, after assembly, the structural adhesive only has planar contact with the bottom surface of the battery, meaning that even with adhesive fixation, loosening can occur, weakening the effect of suppressing battery expansion.

[0004] Therefore, there is an urgent need for a battery casing, a single battery cell, and an electrical device to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a battery casing that can improve the structural strength and external connection strength of the battery casing, and suppress the cell expansion of the individual battery cells assembled with the battery casing.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery casing, comprising an annular sidewall and a bottom wall, wherein the annular sidewall has an opening at one end along a first direction and the bottom wall at the other end, the bottom wall having a first reinforcing structure, the outer surface of the bottom wall being a first reinforcing surface and the inner surface of the bottom wall being a second reinforcing surface, the first reinforcing structure being protruding along a direction from the first reinforcing surface toward the second reinforcing surface, the first reinforcing structure comprising:

[0008] The first reinforcing rib extends along the second direction;

[0009] Multiple second reinforcing ribs are provided at intervals. The multiple second reinforcing ribs extend along a third direction and are all connected to the first reinforcing rib. The first direction, the second direction, and the third direction are perpendicular to each other.

[0010] Optionally, the first reinforcing structure has a recessed platform on the first reinforcing surface and a protrusion on the second reinforcing surface.

[0011] Optionally, the depth of the aforementioned recessed platform is D, and the height of the aforementioned boss is H, where D < 0.5 mm and H < 0.4 mm.

[0012] Optionally, the cross-sectional width of the recessed platform is W1, and the cross-sectional width of the boss is W2, where W1 > 0.1 mm and W2 < W1.

[0013] Optionally, any two of the aforementioned second reinforcing ribs may be disposed at both ends of the aforementioned first reinforcing rib.

[0014] Optionally, the aforementioned annular sidewall is provided with a second reinforcing structure on both sides along the aforementioned third direction.

[0015] Optionally, the annular sidewall is provided with a third reinforcing structure on both sides along the second direction.

[0016] Another objective of this invention is to provide a single-cell battery that can improve the structural strength and external connection strength of the single-cell battery, and suppress the expansion of the cell inside the single-cell battery, thereby improving the safety of the single-cell battery.

[0017] To achieve this objective, the present invention adopts the following technical solution:

[0018] A single battery cell includes a battery cell, a battery top cover, and the aforementioned battery casing. The battery cell is disposed within the aforementioned battery casing, and the aforementioned battery top cover is sealed to the aforementioned opening of the aforementioned battery casing.

[0019] Another objective of this invention is to provide an electrical device that can strengthen the connection between the individual battery cell and the fixing adhesive, suppress cell expansion, and improve the safety of the electrical device.

[0020] To achieve this objective, the present invention adopts the following technical solution:

[0021] The electrical device includes a fixing adhesive and a plurality of the aforementioned individual cells. The fixing adhesive covers the plurality of individual cells near the bottom to fix the plurality of individual cells.

[0022] Optionally, the aforementioned adhesive is filled into the aforementioned first reinforcing structure to form a snap-fit ​​structure, which is snap-fitted to the aforementioned first reinforcing structure.

[0023] The beneficial effects of this utility model are:

[0024] This utility model provides a battery casing, a single battery cell, and an electrical device. By setting a first reinforcing structure at the bottom, the structural strength of the battery casing is improved, thereby increasing the structural strength of the single battery cell mounted on the battery casing and effectively reducing the probability of casing deformation. After the battery casing is assembled into a single battery cell and grouped together, a fixing adhesive is filled into the first reinforcing structure and cooperates with the first and second reinforcing ribs. The first reinforcing rib and the fixing adhesive, together, provide a third-direction restraining force to the single battery cell mounted on the battery casing, thereby suppressing the expansion of the single battery cell in the third direction. At the same time, the second reinforcing rib and the fixing adhesive, together, provide the single battery cell with a second-direction restraining force and an auxiliary third-direction restraining force, thereby strengthening the connection strength between the fixing adhesive and the single battery cell and further suppressing the expansion of the single battery cell. Attached Figure Description

[0025] Figure 1 This is an axonometric view of the battery casing from one perspective, provided in a specific embodiment of this utility model;

[0026] Figure 2 This is an isometric view of the battery casing from another perspective, provided in a specific embodiment of this utility model;

[0027] Figure 3 This is an isometric view of a single battery provided in a specific embodiment of this utility model;

[0028] Figure 4 This is an isometric view of a portion of the electrical device structure provided in a specific embodiment of this utility model.

[0029] In the picture:

[0030] 100. Battery casing; 200. Battery top cover; 2000. Fixing adhesive; 2100. Snap-fit ​​structure;

[0031] 10. Annular sidewall;

[0032] 20. Bottom wall; 21. First reinforcing surface; 22. Second reinforcing surface;

[0033] 30. First reinforcing structure; 301. Recessed platform; 302. Boss; 31. First reinforcing rib; 32. Second reinforcing rib. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] The following reference Figures 1 to 4 This invention introduces the battery casing 100, the single battery cell, and the power supply device provided by this utility model.

[0039] It should be noted that the first direction in this embodiment is Figure 1 The Z direction in the figure is also the height direction of the battery casing 100, and the second direction is... Figure 1 The X direction in the figure is also the width direction of the battery casing 100; the third direction is... Figure 1 The Y direction in the figure is also the thickness direction of the battery casing 100, and the X, Y, and Z directions are all perpendicular to each other. Generally, when a single cell expands, it tends to expand along a third direction.

[0040] Please refer to Figure 1 and Figure 2 This embodiment provides a battery housing 100, which includes an annular sidewall 10 and a bottom wall 20. The annular sidewall 10 has an opening at one end along a first direction and a bottom wall 20 at the other end. The bottom wall 20 has a first reinforcing structure 30. The outer surface of the bottom wall 20 is a first reinforcing surface 21, and the inner surface of the bottom wall 20 is a second reinforcing surface 22. The first reinforcing structure 30 protrudes from the first reinforcing surface 21 toward the second reinforcing surface 22. The first reinforcing structure 30 includes a first reinforcing rib 31 and a plurality of second reinforcing ribs 32. The first reinforcing rib 31 extends along a second direction. The plurality of second reinforcing ribs 32 are spaced apart and extend along a third direction and are all connected to the first reinforcing rib 31. The first direction, the second direction, and the third direction are perpendicular to each other.

[0041] In this embodiment, the battery casing 100 improves its structural strength by providing a first reinforcing structure 30 at the bottom, thereby increasing the structural strength of the individual battery cells mounted on the battery casing 100 and effectively reducing the probability of deformation of the battery casing 100. After the battery casing 100 is assembled into individual batteries and grouped together, the fixing adhesive 2000 fills the first reinforcing structure 30 and cooperates with the first reinforcing rib 31 and the second reinforcing rib 32. The first reinforcing rib 31 and the fixing adhesive 2000 together provide a third-direction restraining force to the individual battery cells mounted on the battery casing 100, thereby suppressing the expansion of the individual battery cells in the third direction. At the same time, the second reinforcing rib 32 and the fixing adhesive 2000 together provide the individual battery cells with a second-direction restraining force and an auxiliary third-direction restraining force, and increase the contact area when the battery casing 100 is connected to the external fixing adhesive 2000, thereby strengthening the connection strength between the fixing adhesive 2000 and the individual battery cells, and further suppressing the expansion of the individual battery cells.

[0042] In this embodiment, the first reinforcing structure 30 has a recessed platform 301 formed on the first reinforcing surface 21 and a boss 302 formed on the second reinforcing surface 22, so as to improve the connection strength between the battery casing 100 and the external structure connection surface.

[0043] Optionally, the depth of the recessed platform 301 is D, and the height of the boss 302 is H, where D < 0.5 mm and H < 0.4 mm. This ensures that the first reinforcing structure 30 does not affect the internal space occupied by the battery casing 100, while still achieving its reinforcing and external connection reinforcement functions.

[0044] Optionally, the cross-sectional width of the sunk platform 301 is W1, and the cross-sectional width of the convex platform 302 is W2, where W1 > 0.1 mm and W2 < W1. In this way, its strengthening effect and the effect of strengthening the external connection can be achieved.

[0045] Furthermore, any two of the multiple second reinforcing ribs 32 are respectively arranged at both ends of the first reinforcing rib 31. With this arrangement, both ends of the first reinforcing rib 31 in the second direction are closed, so that when the single cell loaded with the battery housing 100 is connected to the outside, it has a certain limiting resistance in the second direction, and also reduces the possibility of the single cell shaking in the fixing glue 2000.

[0046] Optionally, there are three second reinforcing ribs 32 in this embodiment to form a first reinforcing structure 30 in the shape of a "king character", so that the bottom wall 20 of the battery housing 100 is stressed evenly.

[0047] In some optional embodiments, second reinforcing structures are provided on both sides of the annular side wall 10 along the third direction to enhance the structural strength of both side walls of the battery housing 100 along its own thickness direction, thereby further improving the suppression effect on the expansion of the battery core.

[0048] Furthermore, third reinforcing structures are provided on both sides of the annular side wall 10 along the second direction to provide reinforcing ribs similar to the first reinforcing structure 30 on both side walls in the length direction of the battery housing 100, thereby further improving the suppression effect on the expansion of the battery core.

[0049] Optionally, the shapes of the second reinforcing structure and the third reinforcing structure are respectively in the shapes of a "one character", a "cross character" or a "king character", etc., and no specific limitation is made here.

[0050] Please refer to Figure 3 In addition, this embodiment also provides a single cell, which includes a battery core, a battery top cover 200 and the battery housing 100 described in any of the above solutions. The battery core is arranged inside the battery housing 100, and the battery top cover 200 is sealingly connected to the opening of the battery housing 100. By using the above battery housing 100, the structural strength of the single cell is increased, and at the same time, the suppression force on the expansion of the battery core is improved, and the safety of the single cell is improved.

[0051] It can be understood that the single cell can be specifically a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid (or lead-acid storage) battery, a lithium-ion battery, a polymer lithium-ion battery, etc. The single cell can also be a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery or a sodium-ion battery or a magnesium-ion battery, etc., which will not be elaborated here.

[0052] Please refer to Figure 4This embodiment also provides an electrical device, characterized in that it includes a fixing adhesive 2000 and a plurality of individual battery cells as described in any of the above embodiments. The fixing adhesive 2000 covers the plurality of individual battery cells near their bottom positions to fix them in place. By using the aforementioned individual battery cells, the contact area and connection strength between the fixing adhesive 2000 and the individual battery cells are increased, while the fixing adhesive 2000's restriction on the individual battery cells in their thickness direction is improved, thereby enhancing the suppression of cell expansion and thus improving the safety of the electrical device.

[0053] It is understood that the electrical equipment in question could specifically be a battery module, battery pack, automobile, or other energy storage device, which will not be elaborated here.

[0054] Specifically, the fixative 2000 is filled into the first reinforcing structure 30 to form a snap-fit ​​structure 2100. The snap-fit ​​structure 2100 is snap-fitted to the first reinforcing structure 30, thereby enhancing the connection strength between the fixative 2000 and the individual cells, and thus improving the suppression effect on cell expansion.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery housing, characterized by The application relates to a battery shell (100) comprising a ring-shaped side wall (10) and a bottom wall (20), wherein the ring-shaped side wall (10) is provided with an opening at one end in a first direction and is provided with the bottom wall (20) at the other end, the bottom wall (20) is provided with a first reinforcing structure (30), an outer surface of the bottom wall (20) is a first reinforcing surface (21), an inner surface of the bottom wall (20) is a second reinforcing surface (22), the first reinforcing structure (30) is arranged in a protruding mode along a direction from the first reinforcing surface (21) to the second reinforcing surface (22), and the first reinforcing structure (30) comprises: a first reinforcing rib (31) arranged in an extending mode along a second direction; a plurality of second reinforcing ribs (32) arranged in an interval mode, wherein the second reinforcing ribs (32) are arranged in an extending mode along a third direction and are all arranged in a communicating mode with the first reinforcing rib (31), and the first direction, the second direction and the third direction are perpendicular to each other in pairs.

2. The battery case according to claim 1, characterized by The first reinforcing structure (30) is formed with a sunken platform (301) on the first reinforcing surface (21), and the first reinforcing structure (30) is formed with a convex platform (302) on the second reinforcing surface (22).

3. The battery case according to claim 2, characterized by The depth of the sunken platform (301) is D, the height of the convex platform (302) is H, D < 0.5 mm, and H < 0.4 mm.

4. The battery case according to claim 3, characterized by The cross-sectional width of the sunken platform (301) is W1, the cross-sectional width of the convex platform (302) is W2, W1 > 0.1 mm, and W2 < W1.

5. The battery case of claim 1, wherein, Any two of the plurality of second reinforcing ribs (32) are arranged at two ends of the first reinforcing rib (31) respectively.

6. The battery housing of any one of claims 1-5, wherein, The ring-shaped side wall (10) is provided with a second reinforcing structure on both sides in the third direction.

7. The battery case of claim 6, wherein, The ring-shaped side wall (10) is provided with a third reinforcing structure on both sides in the second direction.

8. A single cell characterized by The application relates to a battery (1000) comprising a battery cell, a battery top cover (200) and the battery shell (100) as claimed in any one of claims 1-7, wherein the battery cell is arranged in the battery shell (100), and the battery top cover (200) is sealingly connected to the opening of the battery shell (100).

9. An electrical device, characterized by The application relates to a single battery (1000) comprising a fixing glue (2000) and a plurality of single batteries as claimed in claim 8, wherein the fixing glue (2000) is arranged at positions close to the bottom of the plurality of single batteries to fix the plurality of single batteries.

10. The powered device of claim 9, wherein, The fixing glue (2000) is filled in the first reinforcing structure (30) to form a clamping structure (2100), and the clamping structure (2100) is clamped and connected with the first reinforcing structure (30).

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