CN-122000565-A - Shell structure of cylindrical battery and cylindrical battery

Abstract

The application discloses a shell structure of a cylindrical battery and the cylindrical battery, wherein the shell structure of the cylindrical battery is provided with a central line extending along the axial direction and a radial direction, comprises a bottom plate and a side plate, the bottom plate has a plurality of installation department along axial one side, and installation department encircles the central line setting, and a plurality of installation departments are along radial interval arrangement, and the curb plate is optionally connected in an installation department, and bottom plate and curb plate enclose into the chamber of holding. The shell structure of the application can be suitable for manufacturing cylindrical batteries with various diameters, and does not need to design and manufacture shell preparation dies with various sizes, thereby reducing the number of dies and processing cost.

Inventors

• WANG LU
• HU CHUNBO
• YANG WEI

Assignees

• 欣旺达动力科技股份有限公司

Dates

Publication Date

20260508

Application Date

20260105

Claims (10)

1. 1. A case structure of a cylindrical battery having a center line (M) extending in an axial direction (X) and a radial direction (Y), characterized by comprising: a bottom plate (10), wherein one side of the bottom plate (10) along the axial direction (X) is provided with a plurality of mounting parts, the mounting parts are arranged around the central line (M), and the plurality of mounting parts are arranged at intervals along the radial direction (Y); -a side plate (20), said side plate (20) being selectively connectable to one of said mounting portions, said bottom plate (10) and said side plate (20) enclosing a receiving cavity (30).
2. 2. The cylindrical battery case structure according to claim 1, wherein the mounting portion is a slot (11) provided in the bottom plate (10), and the side plate (20) is inserted into the slot (11).
3. 3. The cylindrical battery housing structure according to claim 2, wherein a plurality of the slots (11) are coaxially arranged.
4. 4. The cylindrical battery housing structure according to claim 2, wherein the bottom plate (10) includes a body (12) and a plurality of bosses (13), the bosses (13) being connected to one side of the body (12) in the axial direction (X) and disposed around the center line (M), the plurality of bosses (13) being arranged at intervals in the radial direction (Y), each boss (13) being provided with one of the slots (11).
5. 5. The cylindrical battery case structure according to claim 4, wherein the body (12) includes an intermediate portion (121) and an edge portion (122) connected to each other, the edge portion (122) being disposed around the intermediate portion (121), the boss portion (13) being connected to the edge portion (122); The middle part (121) protrudes into the accommodating cavity (30) to form a protruding part (123), and one side end surface of the protruding part (123) facing the accommodating cavity (30) is higher than one side end surface of the protruding part (13) facing the accommodating cavity (30).
6. 6. The cylindrical battery housing structure according to claim 4, wherein the body (12) has a cutoff groove (14), the cutoff groove (14) is disposed between two adjacent protrusions (13), the cutoff groove (14) is concavely disposed on a side of the body (12) facing away from the accommodating chamber (30), and the cutoff groove (14) is disposed around the center line (M).
7. 7. The cylindrical battery case structure according to claim 6, wherein adjacent two of the protrusions (13) include an inner protrusion (131) and an outer protrusion (132) arranged at intervals in the radial direction (Y), and the cutoff groove (14) is spaced from the inner protrusion (131) by a distance smaller than the distance between the cutoff groove (14) and the outer protrusion (132) in the radial direction (Y).
8. 8. The cylindrical battery housing structure according to claim 6, wherein the cross-sectional area of the cutoff groove (14) gradually increases from a side of the body (12) toward the accommodation chamber (30) to a side away from the accommodation chamber (30).
9. 9. The cylindrical battery housing structure according to claim 5, wherein the body (12) has a pressure relief groove (15), the pressure relief groove (15) being recessed in a side of the intermediate portion (121) facing away from the receiving cavity (30).
10. 10. A cylindrical battery comprising the case structure of the cylindrical battery according to any one of claims 1 to 9.

Description

Shell structure of cylindrical battery and cylindrical battery Technical Field The application belongs to the technical field of batteries, and particularly relates to a shell structure of a cylindrical battery and the cylindrical battery. Background The cylindrical battery has high capacity, long cycle life and wide use environment temperature. With the progress of the cylindrical battery technology, the diameter and height of the cylindrical battery are also increasing. In the related art, a shell of a cylindrical battery is manufactured through a die, and different dies are required to be respectively equipped for processing the cylindrical batteries with different specifications (diameters), so that the processing cost is high. Disclosure of Invention The application aims to provide a shell structure of a cylindrical battery, which can solve the problem that the processing cost is high because the cylindrical battery shell is manufactured by a die and different dies are required to be respectively equipped for processing the cylindrical batteries with different specifications (diameters). In order to solve the technical problems, the application is realized as follows: In a first aspect, an embodiment of the present application provides a housing structure of a cylindrical battery, having a central line extending along an axial direction and a radial direction, including a bottom plate and a side plate, where one side of the bottom plate along the axial direction has a plurality of mounting portions, the mounting portions are disposed around the central line, the plurality of mounting portions are arranged at intervals along the radial direction, and the side plate is selectively connected to one of the mounting portions, and the bottom plate and the side plate enclose a receiving cavity. Optionally, the mounting portion is a slot formed in the bottom plate, and the side plate is inserted into the slot. Optionally, a plurality of the slots are coaxially arranged. Optionally, the bottom plate includes body and a plurality of bellying, the bellying connect in the body is followed one side of axial and encircle the central line sets up, a plurality of bellying are followed radial interval arranges, every the bellying all is equipped with one the slot. Optionally, the body comprises a middle part and an edge part which are connected with each other, the edge part is arranged around the middle part, the protruding part is connected with the edge part, the middle part protrudes towards the inside of the accommodating cavity to form a protruding part, and one side end surface of the protruding part towards the accommodating cavity is higher than one side end surface of the protruding part towards the accommodating cavity. Optionally, the body has a cut-off groove, cut-off groove locates adjacent two between the bellying, cut-off groove is concave to be located the body deviates from the one side of holding the chamber, cut-off groove encircles the central line sets up. Optionally, the two adjacent protruding parts include an inner protruding part and an outer protruding part arranged at intervals along the radial direction, and the distance between the intercepting groove and the inner protruding part is smaller than the distance between the intercepting groove and the outer protruding part along the radial direction. Optionally, the cross-sectional area of the cutoff slot gradually increases from a side of the body toward the accommodation chamber to a side away from the accommodation chamber. Optionally, the body has a pressure relief groove, the pressure relief groove is concave to be located the middle part deviates from the one side of holding the chamber. In a second aspect, an embodiment of the present application provides a cylindrical battery, including the housing structure of the cylindrical battery of any one of the embodiments described above. In the embodiment of the application, the shell structure of the cylindrical battery comprises a bottom plate and a side plate, wherein a plurality of annular installation parts are arranged on one side of the bottom plate along the axis, the installation parts are arranged at intervals along the radial direction, so that the diameters of two adjacent annular installation parts are different, the side plate is selectively connected with one installation part, and the side plate and the bottom plate are enclosed into a containing cavity, so that the shell of the cylindrical battery is formed. In the actual use process, the matched installation part on the bottom plate can be selected as a target installation part according to the diameter of the prepared cylindrical battery, the side plate is connected to the target installation part, and then the part (if any) of the bottom plate, which is positioned outside the target installation part, is cut off, so that the required cylindrical shell is obtained. Therefore, the shell structure of the application can be s