Cylindrical battery shell assembly

Abstract

The utility model discloses a cylindrical battery shell component which comprises a shell, a pole, a buckle end cap, an insulating component and a collector plate, one end of the shell is an open end, the other end of the shell is a closed end, the open end is used for being connected with a battery cover plate, the closed end is provided with a boss facing the outer side of the shell, a convex space is formed in the boss, the boss is provided with a mounting hole, and the mounting hole is communicated with the battery cover plate. The collector plate is arranged in the shell, the pole comprises a welding table and a column body arranged on the welding table, the bottom of the welding table is connected with the collector plate, the column body penetrates through the mounting hole and is connected with a buckle end cap on the outer side of the shell, and the insulation assembly is used for achieving insulation and sealing between the pole and the shell and between the collector plate and the shell. And the insulating component extends into the convex space. The cylindrical battery has the beneficial effects that the boss is arranged on the shell, so that the internal space of the shell is enlarged, a blank space is prevented from being generated between the pole and the collector plate, the internal space utilization rate of the cylindrical battery is improved, and the capacity of a battery cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cylindrical battery shell assembly. Background Art

[0002] With the in-depth development of the energy storage industry, cylindrical cells have become a major pillar in the battery field due to their advantages such as high production efficiency, high energy density and low manufacturing cost. In addition, the size of cylindrical cells has gradually been standardized. Therefore, how to make full use of the limited volume space to further improve energy density is a key optimization direction. Usually, the top of the cylindrical shell is a flat hole structure. During the battery assembly process, especially when the negative column and the cell shell are sealed, the negative column needs to pass through the hole structure at the top of the shell, and insulating structural parts need to be added to the current collector and the negative column. This results in blank space between the current collector and the top of the shell after assembly, affecting the space utilization of the cell. Utility Model Content

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a cylindrical battery shell assembly. By arranging a boss on the shell, the internal space of the shell is increased, the blank space between the pole and the collecting plate is avoided, the internal space utilization rate of the cylindrical battery is improved, and the battery cell capacity is increased.

[0004] The purpose of the utility model is achieved through the following technical measures: a cylindrical battery shell assembly, comprising a shell, a pole, a snap-on end cap, an insulating assembly and a current collecting plate, one end of the shell is an open end, and the other end of the shell is a closed end, the open end is used to connect the battery cover, the closed end is provided with a boss facing the outside of the shell, an outward convex space is formed in the boss, the boss is provided with a mounting hole, the current collecting plate is arranged in the shell, the pole comprises a welding platform and a column arranged on the welding platform, the bottom of the welding platform is connected to the current collecting plate, the column passes through the mounting hole and is connected to the snap-on end cap on the outside of the shell, the insulating assembly is used to achieve insulation and sealing between the pole and the current collecting plate and the shell, and when the column is connected to the snap-on end cap, the insulating assembly extends into the outward convex space.

[0005] In some embodiments, the insulating assembly includes an insulating sheet and an insulating sleeve, the insulating sheet is disposed between the collecting plate and the shell, and the insulating sleeve is disposed between the shell and the column.

[0006] In some embodiments, the snap-on end cap is mounted on the outside of the column.

[0007] In some embodiments, the snap-on end cap is snap-fitted to the column.

[0008] In some embodiments, a groove is provided on the side of the column, the snap-on end cap is provided with a hollow channel matching the column, and a protrusion matching the groove is provided in the hollow channel.

[0009] In some embodiments, the maximum outer diameter of the snap cap is larger than the diameter of the mounting hole.

[0010] In some embodiments, the boss and the mounting hole are coaxial with the pole.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention increases the internal space of the shell by arranging a boss on the shell, extends the insulating component into the outer convex space, avoids the generation of blank space between the pole and the collecting plate, and under the condition of the same shell height, the height of the winding core inside the shell is increased, thereby improving the internal space utilization rate of the cylindrical battery and increasing the battery cell capacity.

[0012] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Among them, 1. shell, 2. welding table, 3. column, 4. snap-on end cap, 5. collecting plate, 6. insulating sheet, 7. insulating sleeve. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, a cylindrical battery shell assembly includes a shell 1, a pole, a snap-on end cap 4, an insulating assembly and a current collecting plate 5, one end of the shell 1 is an open end, and the other end of the shell 1 is a closed end, the open end is used to connect the battery cover, the closed end is provided with a boss facing the outside of the shell 1, an outward convex space is formed in the boss, the boss is provided with a mounting hole, the current collecting plate 5 is arranged in the shell 1, the pole includes a welding platform 2 and a column 3 provided on the welding platform 2, the bottom of the welding platform 2 is connected to the current collecting plate 5, preferably, the bottom of the welding platform 2 is welded to the current collecting plate 5, the column 3 passes through the mounting hole and is connected to the snap-on end cap 4 on the outside of the shell 1, the snap-on end cap 4 is used to achieve fixation between the pole and the shell 1, the insulating assembly is used to achieve insulation and sealing between the pole and the current collecting plate 5 and the shell 1, and when the column 3 is connected to the snap-on end cap 4, the insulating assembly extends into the outward convex space. Specifically, the inner diameter of the boss is larger than the diameter of the insulating assembly extending into the boss, and the height of the boss is higher than the height of the insulating assembly, so that the insulating assembly can extend into the outer convex space of the boss. Preferably, the inner diameter of the boss is slightly larger than the diameter of the insulating assembly extending into the boss, and the height of the boss is slightly larger than the height of the insulating assembly, so that after the housing 1 is assembled with the pole and the insulating assembly, the insulating assembly can both insulate and seal the housing 1 and the pole.

[0016] The present invention increases the internal space of the shell 1 by arranging a boss on the shell 1. During the battery assembly process, the insulating component of the pole can be extended into the outer convex space of the boss to avoid blank space caused by the connection between the pole and the collecting plate 5, thereby reducing the gap between the shell 1 and the collecting plate 5, and further reducing the gap between the end face of the shell 1 and the winding core. Under the condition of the same shell 1 height, the height of the winding core in the shell 1 is increased, thereby improving the internal space utilization rate of the cylindrical battery and increasing the battery cell capacity.

[0017] In some embodiments, the insulation assembly includes an insulating sheet 6 and an insulating sleeve 7. The insulating sheet 6 is disposed between the current collecting plate 5 and the housing 1, insulating the current collecting plate 5 from the housing 1. The insulating sleeve 7 is disposed between the housing 1 and the pole, insulating the housing 1 from the welding platform 2 and the pole 3. When the pole 3 is connected to the snap-on end cap 4, the insulating sleeve 7 is embedded in the outer convex space.

[0018] In some embodiments, the snap-on end cap 4 is sleeved on the outside of the column 3 , and the housing 1 is clamped by the snap-on end cap 4 and the welding platform 2 of the pole, thereby achieving fixation between the pole and the housing 1 .

[0019] In some embodiments, the snap-on end cap 4 is snap-fitted to the column 3. Preferably, a groove is provided on the side of the column 3, and the snap-on end cap 4 is provided with a hollow channel matching the column 3, and a protrusion matching the groove is provided in the hollow channel. When the snap-on end cap 4 is snap-fitted to the column 3, the protrusion is located in the groove.

[0020] In some embodiments, the maximum outer diameter of the snap-on end cap 4 is larger than the diameter of the mounting hole, so as to effectively fix the pole and the housing 1 .

[0021] In some embodiments, the boss and the mounting hole are coaxial with the pole.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0023] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0026] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A cylindrical battery housing assembly, characterized in that: It includes a shell, a pole, a snap-on end cap, an insulating assembly and a collecting plate, one end of the shell is an open end, and the other end of the shell is a closed end, the open end is used to connect the battery cover, the closed end is provided with a boss facing the outside of the shell, an outward convex space is formed in the boss, the boss is provided with a mounting hole, the collecting plate is arranged in the shell, the pole includes a welding platform and a column arranged on the welding platform, the bottom of the welding platform is connected to the collecting plate, the column passes through the mounting hole and is connected to the snap-on end cap on the outside of the shell, the insulating assembly is used to achieve insulation and sealing between the pole and the collecting plate and the shell, and when the column is connected to the snap-on end cap, the insulating assembly extends into the outward convex space.

2. The cylindrical battery housing assembly according to claim 1, characterized in that: The insulating assembly includes an insulating sheet and an insulating sleeve. The insulating sheet is arranged between the collecting plate and the shell, and the insulating sleeve is arranged between the shell and the column.

3. The cylindrical battery housing assembly according to claim 1, wherein: The buckle end cap is sleeved on the outer side of the column.

4. The cylindrical battery housing assembly according to claim 3, wherein: The buckle end cap is snap-connected with the column.

5. The cylindrical battery housing assembly according to claim 4, characterized in that: A groove is provided on the side of the column, and the buckle end cap is provided with a hollow channel matching the column, and a protrusion matching the groove is provided in the hollow channel.

6. The cylindrical battery housing assembly according to claim 3, wherein: The maximum outer diameter of the buckle end cap is greater than the diameter of the mounting hole.

7. The cylindrical battery housing assembly according to claim 1, wherein: The boss and the mounting hole are coaxial with the pole.

Images