Shell assembly and battery

Abstract

The utility model relates to a shell assembly and a battery, the shell assembly comprises a shell and a cover plate, and the shell is provided with an opening end; the cover plate is connected to the shell and covers the opening end, and the cover plate is provided with a plurality of pits and / or a plurality of ribs protruding out of the cover plate. The utility model also discloses a battery. According to the utility model, the deformation of the cover plate can be effectively prevented, so that the flatness of the cover plate is improved, the assembly of the cover plate and the shell is facilitated, and the assembly efficiency and the assembly precision of the cover plate and the shell are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a casing assembly and a battery. Background Technology

[0002] With the rapid development of the new energy industry, lithium batteries have gradually been widely promoted and applied due to their advantages such as environmental friendliness, high energy density, and long cycle life. Existing lithium batteries generally consist of a casing and a cover plate, with the cover plate connected to the casing. Because the cover plate is generally thin, it is prone to deformation and becomes uneven, which is not conducive to the assembly of the cover plate and the casing, reducing assembly efficiency and accuracy. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to reduce the deformation of the cover plate and improve its flatness, so as to facilitate the assembly of the cover plate and the shell.

[0004] To solve the above-mentioned technical problems, this utility model provides a housing assembly, including,

[0005] A housing having an open end;

[0006] A cover plate, which is connected to the housing and seals the opening end, is provided with a plurality of recesses and / or a plurality of ribs protruding from the cover plate.

[0007] In one embodiment of the present invention, the plurality of recesses on the cover plate are arranged in an array.

[0008] In one embodiment of this utility model, the cross-section of the recess is rectangular, V-shaped, or trapezoidal.

[0009] In one embodiment of this utility model, at least two of the ribs are arranged in a cross configuration.

[0010] In one embodiment of this utility model, two of the plurality of ribs are arranged in a cross configuration, and the intersection of the two cross ribs is located in the middle of the cover plate to form a central intersection point.

[0011] In one embodiment of the present invention, the plurality of ribs further includes annular ribs, each annular rib surrounding the periphery of the central intersection point, and the two intersecting ribs forming the central intersection point passing through the annular ribs.

[0012] In one embodiment of the present invention, the plurality of ribs include a plurality of annular ribs, the centers of the plurality of annular ribs being coincident.

[0013] In one embodiment of this utility model, the plurality of ribs include multiple rows of horizontally arranged straight ribs and multiple columns of vertically arranged straight ribs, and each row of horizontally arranged straight ribs intersects with all the vertically arranged straight ribs.

[0014] In one embodiment of this utility model, a positive electrode and a negative electrode are connected to the housing, the housing is a conductive component, and the positive electrode is thermally fused to the housing via an insulating sheet.

[0015] In one embodiment of this utility model, the housing is further provided with a liquid injection hole, and the liquid plug is connected to the housing and seals the liquid injection hole.

[0016] This utility model also discloses a battery, including a battery cell and a housing assembly as described in any of the above claims, wherein the battery cell is located inside the housing.

[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0018] The outer casing assembly and battery described in this utility model can effectively prevent the cover plate from deforming, thereby improving the flatness of the cover plate, making it easier to assemble the cover plate and the casing, and improving the assembly efficiency and accuracy of both. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the battery of this utility model;

[0021] Figure 2 yes Figure 1 Top view of the structure shown;

[0022] Figure 3 yes Figure 2 The structure shown is a cross-sectional view at point AA;

[0023] Figure 4 yes Figure 3 A magnified view of a section at point M;

[0024] Figure 5 yes Figure 3 A schematic diagram of one type of pit at point M;

[0025] Figure 6 yes Figure 3 A schematic diagram of another form of the pit at point M;

[0026] Figure 7 yes Figure 1 Exploded view of the structure shown;

[0027] Figure 8 yes Figure 7 A schematic diagram of the structure from another angle;

[0028] Figure 9 This is a schematic diagram of the second embodiment of the battery of this utility model;

[0029] Figure 10 yes Figure 9 Top view of the structure shown;

[0030] Figure 11 yes Figure 10 The structure shown is a cross-sectional view at BB.

[0031] Figure 12 yes Figure 9 Exploded view of the structure shown;

[0032] Figure 13 yes Figure 12 A schematic diagram of the structure from another angle;

[0033] Figure 14 This is a schematic diagram of the third embodiment of the battery of this utility model;

[0034] Figure 15 yes Figure 14 Exploded view of the structure shown;

[0035] Figure 16 yes Figure 15 A schematic diagram of the structure from another angle;

[0036] Figure 17 This is a schematic diagram of the fourth embodiment of the battery of this utility model;

[0037] Figure 18 yes Figure 17 Top view of the structure shown;

[0038] Figure 19 yes Figure 17 Exploded view of the structure shown;

[0039] Figure 20 yes Figure 19 A schematic diagram of the structure from another angle;

[0040] Explanation of reference numerals in the instruction manual:

[0041] 10. Shell; 101. Open end;

[0042] 20. Cover plate; 201. Recess; 202. Rib; 203. Intersection point;

[0043] 30. Positive electrode; 40. Insulating sheet; 50. Negative electrode; 60. Liquid plug; 70. Battery cell. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present disclosure or its application or use.

[0045] In the description of this utility model, it should be understood that the terms "vertical," "upper," "lower," "top," "side," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the utility model and simplifying the description, 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, and therefore should not be construed as a limitation of the 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 or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Example 1

[0048] See Figures 1-8 This embodiment discloses a housing assembly, including a housing 10 and a cover plate 20;

[0049] The housing 10 has an open end 101 to facilitate placing the battery cell 70 into the housing 10 through the opening of the open end 101;

[0050] The cover plate 20 is connected to the housing 10 and seals the opening end 101, so that the entire housing 10 is in a closed state. The cover plate 20 is provided with multiple recesses 201.

[0051] By setting multiple recesses 201 on the cover plate 20, the deformation of the cover plate 20 can be effectively offset, thereby improving the flatness of the cover plate 20 and preventing deformation such as warping or overall arching. It also helps to improve the structural stability and overall performance of the cover plate 20, which makes it easier to assemble the cover plate 20 and the shell 10, improves the ease and accuracy of assembly, and can also greatly improve the assembly efficiency.

[0052] In addition, the above method will not increase the weight of the cover plate 20, and is more conducive to meeting the requirements of battery lightweighting.

[0053] The cover plate 20 mentioned above can be made of stainless steel.

[0054] Furthermore, such as Figure 2 As shown, the multiple pits 201 on the cover plate 20 are arranged in an array. Preferably, the multiple pits 201 are evenly distributed to better eliminate the internal stress of the cover plate 20 and counteract deformation.

[0055] In some implementations, such as Figure 4 As shown, the cross-section of the pit 201 is trapezoidal, and the trapezoid can be an inverted trapezoidal structure to better counteract the deformation of the cover plate 20.

[0056] like Figure 5 As shown, the cross-section of the pit 201 can also be rectangular, or as shown in the figure. Figure 6 As shown, the cross-section of the pit 201 can also be rectangular V-shaped.

[0057] In some implementations, such as Figure 1 As shown, a positive electrode 30 and a negative electrode 50 are connected to the housing 10. The housing 10 is a conductive component. At this time, the housing 10 and the negative electrode 50 together act as the negative electrode. The negative electrode 50 can be welded to the housing 10. The positive electrode 30 is thermally fused to the housing 10 through the insulating sheet 40 to simplify the battery assembly process and also to avoid gaps between the positive electrode 30, the insulating sheet 40 and the housing 10, thereby effectively improving the battery's sealing performance.

[0058] The positive electrode 30 and the housing 10 are insulated from each other by an insulating sheet 40. The insulating sheet 40 can be made of polypropylene (PP plastic).

[0059] The negative electrode 50 can be made of nickel sheet, and the positive electrode 30 can be made of aluminum. The casing 10 can be made of stainless steel.

[0060] In some embodiments, the housing 10 is further provided with an injection hole to facilitate the injection of electrolyte into the housing 10, and a plug 60 is connected to the housing 10 and seals the injection hole. Further, the plug 60 can be connected to the housing 10 via a gasket.

[0061] The aforementioned liquid plug 60 can be directly welded onto the housing 10.

[0062] This embodiment also discloses a battery, such as Figures 7-8 As shown, the battery includes a cell 70 and a casing assembly as described in any of the above embodiments, with the cell 70 located inside the casing 10. The positive terminal of the cell 70 is electrically connected to the positive electrode 30, and the negative terminal of the cell 70 is electrically connected to the negative electrode 50.

[0063] Example 2

[0064] See Figures 9-16 The main difference between this embodiment and Embodiment 1 is that: multiple ribs 202 protruding from the cover plate 20 are provided on the cover plate 20 to enhance the strength of the cover plate 20 and prevent the cover plate from deforming.

[0065] like Figure 13 and Figure 16 As shown, the aforementioned rib 202 is formed by protruding outward from the inner wall of the cover plate 20, so that the thickness of the cover plate 20 basically maintains the original thickness and does not significantly increase the weight of the cover plate 20.

[0066] In some implementations, at least two reinforcing ribs 202 are arranged in a cross configuration to better ensure the strength of the cover plate 20.

[0067] Preferred, such as Figure 9 and Figure 14 As shown, the housing assembly has two intersecting ribs 202, and the intersection of the two intersecting ribs 202 is located in the middle of the cover plate 20 to form a central intersection point 203, which can better avoid local deformation of the cover plate 20.

[0068] like Figures 9-13 As shown, the two intersecting ribs 202 that form the middle intersection point 203 are both straight ribs 202 and intersect in a "+" shape;

[0069] Or such as Figures 14-16 As shown, the two intersecting ribs 202 that form the two central intersection points 203 are both straight ribs 202 and intersect in an "X" shape.

[0070] Furthermore, such as Figures 9-13 As shown, the aforementioned outer casing assembly also includes annular ribs 202. Each annular rib 2 surrounds the periphery of the central intersection point 203, and the two intersecting ribs forming the central intersection point 203 pass through the annular ribs. This helps to reduce local deformation of the cover plate, ensure the overall flatness of the cover plate, and prevent deformation phenomena such as edge warping or overall U-shaped arching of the cover plate. Specifically, as... Figure 10As shown in the figure, points a, b, and c are all ribs 202. Points a and b are two straight intersecting ribs, forming a central intersection point 203, while point c is a ring-shaped rib that surrounds the aforementioned intersecting ribs.

[0071] Preferred, such as Figure 10 As shown, multiple annular ribs 202 can be set, with the centers of the multiple annular ribs 202 overlapping each other, so as to better improve the stress balance of the cover plate 20.

[0072] In other implementations, such as Figures 14-16 As shown, two intersecting ribs can also be provided on the cover plate 20, forming an "X" shape.

[0073] This embodiment also discloses a battery, such as Figures 12-13 , or as Figures 15-16 As shown, the battery includes a cell 70 and a casing assembly as described in any of the above embodiments, with the cell 70 located inside the casing 10. The positive terminal of the cell 70 is electrically connected to the positive electrode 30, and the negative terminal of the cell 70 is electrically connected to the negative electrode 50.

[0074] Example 3

[0075] See Figures 17-20 As shown, the main difference between this embodiment and Embodiment Two is that the multiple reinforcing bars 202 have multiple rows of horizontally arranged straight reinforcing bars and multiple columns of vertically arranged straight reinforcing bars, and each row of horizontally arranged straight reinforcing bars intersects with all the vertically arranged straight reinforcing bars. That is, after the intersection, multiple grids in a "well" shape are formed. For example, Figure 20 As shown, each of the above-mentioned ribs 202 is also formed by protruding outward from the inner wall of the cover plate 20.

[0076] Specifically, such as Figure 17 As shown in the figure, points d and e are both straight ribs. Point d is a longitudinal straight rib, while point e is a transverse straight rib, and the two intersect each other.

[0077] The arrangement of the ribs 202 in the above embodiment is more conducive to processing and can also effectively prevent the cover plate 20 from deforming and affecting its flatness.

[0078] This embodiment also discloses a battery, such as Figures 19-20 As shown, the battery includes a cell 70 and a casing assembly as described in any of the above embodiments, with the cell 70 located inside the casing 10. The positive terminal of the cell 70 is electrically connected to the positive electrode 30, and the negative terminal of the cell 70 is electrically connected to the negative electrode 50.

[0079] Example 4

[0080] The difference between this embodiment and the above embodiments is that the cover plate 20 in this embodiment is provided with a plurality of recesses 201 and a plurality of ribs 202 protruding from the cover plate 20. That is, this embodiment is a combination of embodiment one and embodiment two, or a combination of embodiment one and embodiment three. This method can better avoid the deformation of the cover plate 20 and ensure the flatness of the cover plate 20 to the greatest extent.

[0081] The solutions in the above embodiments can effectively prevent the deformation of the cover plate, thereby improving the flatness of the cover plate, avoiding deformation such as warping or overall arching, and making it easier to assemble the cover plate and the shell, thus improving the assembly efficiency and accuracy of both.

[0082] All the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of this utility model. That is, any number of embodiments can be combined to meet the needs of different application scenarios. All of these are within the protection scope of this application and will not be described in detail here.

[0083] It should be noted that the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A housing assembly, characterized in that: include, A housing having an open end; A cover plate, which is connected to the housing and seals the opening end, is provided with a plurality of recesses and / or a plurality of ribs protruding from the cover plate.

2. The housing assembly according to claim 1, characterized in that: The multiple recesses on the cover plate are arranged in an array.

3. The housing assembly according to claim 1, characterized in that: The cross-section of the pit is rectangular, V-shaped, or trapezoidal.

4. The housing assembly according to claim 1, characterized in that: At least two of the ribs are arranged in a cross configuration.

5. The housing assembly according to claim 4, characterized in that: Among the plurality of ribs, two ribs are arranged in a cross configuration, and the intersection of the two ribs is located in the middle of the cover plate to form a central intersection point.

6. The housing assembly according to claim 5, characterized in that: The plurality of ribs also includes annular ribs, each annular rib surrounding the periphery of the central intersection, and the two intersecting ribs forming the central intersection passing through the annular ribs.

7. The housing assembly according to claim 6, characterized in that: The plurality of ribs includes a plurality of annular ribs, the centers of which coincide.

8. The housing assembly according to claim 4, characterized in that: The plurality of ribs include multiple rows of transversely arranged straight ribs and multiple columns of longitudinally arranged straight ribs, with each row of transversely arranged straight ribs intersecting all longitudinally arranged straight ribs.

9. The housing assembly according to claim 1, characterized in that: A positive electrode and a negative electrode are connected to the housing. The housing is a conductive component, and the positive electrode is thermally fused to the housing via an insulating sheet.

10. The housing assembly according to claim 1, characterized in that: The housing is also provided with a liquid injection hole, and a liquid plug is connected to the housing to seal the liquid injection hole.

11. A battery, characterized in that: It includes a battery cell and a housing assembly as described in any one of claims 1-10, wherein the battery cell is located inside the housing.

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