Patent Application
20240372185
The present disclosure claims priority to Chinese Patent Application No. 202220951434.X, filed on Apr. 22, 2022, which is incorporated herein by reference in its entirety.
The present disclosure relates to the field of battery technologies, and in particular, to a battery shell and a battery with a battery shell.
A battery shell is generally processed and shaped in a stamping manner, and to reduce raw material costs on the battery shell, stainless steel is usually selected as a material of the battery shell. However, tensile performance of the stainless steel is poor, and there is a great limitation on punching depth for the battery shell. With a complex shape of the battery shell, the stainless steel may cause increased difficulty on punching the battery shell. Therefore, a material with high tensile performance may be used to form the battery shell, but costs on forming the battery are greatly increased in turn.
The present disclosure provides a battery shell, which can reduce the processing and assembly difficulty.
The present disclosure provides a battery, which can increase space utilization and reduce manufacturing costs.
According to a first aspect, some embodiments provide a battery shell, including a body and two cover plates. The body is a cylinder structure with two openings respectively at two ends, the body is formed by bending a plate with a strip shape at least once, and two ends of the plate are connected to each other. A width of the plate is B1, a width of the cover plate is B2, and B1 is less than B2. The two cover plates respectively block the two openings of the body. The body includes a mounting side surface, and a pole assembly is arranged on the mounting side surface.
According to a second aspect, some embodiments provide a battery, including a cell and the battery shell described above. The battery shell is provided with an accommodating cavity, and the cell is arranged in the accommodating cavity.
In the description of the present disclosure, unless otherwise explicitly specified and defined, terms such as “connection”, “connected”, and “fixed” should be understood in broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; or the connection may be a mechanical connection or an electrical connection; or the connection may be a direct connection, an indirect connection through an intermediary, or internal communication between two components or a mutual action relationship between two elements. A person of ordinary skill in the art may understand specific meanings of the foregoing terms in the present disclosure according to a specific situation.
As shown in
In an embodiment, the ends of the plate 100 are welded. In a case that the plate 100 is bent once, a cross-section of the body 1 may be a circle. In a case that the plate 100 is bent twice, the cross-section of the body 1 may be a triangle or a semi-circle. In a case that the plate 100 is bent three times, the cross-section of the body 1 may be a quadrangle.
Referring to
In the present embodiment, two grooves 103 are provided, and the adjacent grooves 103 are spaced along a width side of the plate 100. In this case, a reinforcing rib 104 is provided between the adjacent grooves 103. The thickness of the plate 100 may be partially thinned by increasing the number of the grooves 103. The adjacent grooves 103 are spaced to define a reinforcing rib 104 therebetween, to improve a support strength of the body 1, to ensure the shape of the bent body 1 normalized as whole, and to reduce deformation of the body 1. In other embodiments, three or even more grooves 103 may alternatively be provided, and the number of the grooves 103 may be selected based on an actual requirement, which is not limited in the present embodiment.
In the present embodiment, the thickness L1 of the plate 100 ranges from 0.25 mm to 0.3 mm, and a distance L2 between an outer side surface of the body 1 and a groove bottom of the groove 103 ranges from 0.15 mm to 0.2 mm. A thickness of a bending region of the plate 100 is limited, so that the plate 100 may be prevented from being broken in a bending process while the bending difficulty is reduced, thereby improving a yield rate.
In an embodiment, a mounting groove 105 is provided on a side surface of the body 1 close to the cover plate 2 in a recessed manner, and the cover plate 2 is embedded in the mounting groove 105. By providing the arrangement of the mounting groove 105, the cover plate 2 and the body 1 may be expediently positioned and assembled, which helps the welding between the cover plate 2 and the body 1, thereby ensuring the welding quality between the cover plate 2 and the body 1.
In the present embodiment, a distance L3 between a groove wall of the mounting groove 105 and the outer side surface of the body 1 ranges from 0.05 mm to 0.1 mm.
Referring to
A liquid injection hole 102 is further provided on the mounting side surface of the body 1 in the present embodiment, and an electrolyte is injected into the accommodating cavity of the battery shell through the liquid injection hole 102. After the electrolyte is injected, a sealing member 5 may be used to seal the liquid injection hole 102. Prior to bending the plate 100, the liquid injection hole 102 may be first in punched on the plate 100. That is, the liquid injection hole 102 and the pole hole 101 are first punched on the plate 100, and the plate 100 is then bent. In this way, the processing difficulty of the body 1 may be reduced to the greatest extent, and manufacturing costs on the battery may be reduced.
In an embodiment, the plate 100 includes a first end 106 and a second end 107 that are welded and connected to each other. Referring to
In the present embodiment, a through hole is provided on the first end 106, a fixing block 109 is arranged on a side surface of the second end 107 close to the first end 106 in a protruding manner, and the fixing block 109 is inserted into the through hole. Through arrangement of the through hole and the fixing block 109, before welding is performed, the first end 106 and the second end 107 may be first inserted and positioned. In this way, the welding difficulty may be reduced, which helps improve the welding quality.
Referring to
In an embodiment, a position at which the first end 106 and the second end 107 of the plate 100 are connected is located on a side surface of the body 1. In this way, the welding difficulty may be reduced. In a case that the body 1 is in a shape of a quadrangle, the plate 100 needs to be bent four times. In other embodiments, the position at which the first end 106 and the second end 107 of the plate 100 are connected may be arranged at a corner of the body 1. In this way, when the body 1 is in a shape of a quadrangle, the plate 100 only needs to be bent three times, and the bending times of the plate 100 is reduced.
Referring to
In an embodiment, punching processing may be performed on the cover plate 2, so that the battery may be also deformed in a transverse direction, thereby further improving the application range of the battery shell.
In an embodiment, the body 1 may alternatively be formed through splicing. In a case that the body 1 is in a shape of a quadrangle, referring to
Referring to
The battery of the present embodiment further includes a cell 4, and the cell 4 is arranged in the accommodating cavity of the battery shell. The pole assembly 3 includes a pole body 301 and an insulating member 302, wherein the pole body 301 is arranged in the pole hole 101, and the insulating member 302 is arranged between the body 1 and the pole body 301. The insulating member 302 may isolate the body 1 from the pole body 301 for insulating, and the insulating member 302 may further block a gap between the pole body 301 and the pole hole 101 to play a sealing function. Two electrodes of the cell 4 are respectively electrically connected to the pole body 301 and the body 1, so that the pole body 301 and the battery 1 respectively serve as a positive electrode and a negative electrode of the battery.
In the description of the present disclosure, it should be understood that orientation or position relationships indicated by the terms such as “upper”, “lower”, “left”, and “right” are based on orientation or position relationships shown in the accompanying drawings, and are used only for ease and brevity of illustration and description of the present disclosure, rather than indicating or implying that the mentioned apparatus or component needs to have a particular orientation or needs to be constructed and operated in a particular orientation. Therefore, such terms should not be construed as a limitation on the present disclosure. In addition, the terms “first” and “second” are only used for the description and do not have specific meanings.
In the description of this specification, description of reference terms such as “an embodiment” and “an example” means that a specific feature, structure, material, or characteristic that is described with reference to the embodiment or the example is included in at least one embodiment or example of the present disclosure. In this specification, schematic description of the foregoing terms does not necessarily indicate the same embodiment or example.
In addition, it should be understood that, although this specification is described according to implementations, not each implementation includes only a separate technical solution. The specification is described in such a manner only for the sake of clarity. A person skilled in the art should take the specification as a whole, and the technical solutions in various embodiments may also be appropriately combined to form other implementations that can be understood by the person skilled in the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202220951434.X | Apr 2022 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/107226 | 7/22/2022 | WO |
