CN-224232890-U - Pole structure, top cover assembly and battery

Abstract

The application discloses a pole structure, a top cover assembly and a battery, wherein the pole structure comprises a pole body, an aluminum ring, an enclosing wall blocking cover structure and injection molding pieces, wherein a first anti-rotation groove and a first anti-rotation positioning hole are formed in the periphery of the pole body, the enclosing wall blocking cover structure extends upwards from the inner side edge of the aluminum ring, a second anti-rotation groove and a second anti-rotation positioning hole are formed in the upper surface of the enclosing wall blocking cover structure, and the injection molding pieces are filled in gaps between the pole body and the aluminum ring, the periphery of the pole body and the upper surface of the enclosing wall blocking cover structure. According to the pole structure, the top cover assembly and the battery, when the injection molding piece is filled, the mutual rotation between the pole body and the aluminum ring is prevented through the anti-rotation positioning function of the first anti-rotation positioning hole and the second anti-rotation positioning hole, and after the injection molding is filled, the mutual rotation between the pole body and the aluminum ring is prevented through the first anti-rotation groove and the second anti-rotation groove, so that the assembly accuracy and precision of the top cover assembly are improved.

Inventors

• WANG LEI
• DENG PINGHUA
• WU ZHINAN
• CAI RULAI

Assignees

• 江西百思利新能源科技股份有限公司

Dates

Publication Date

20260512

Application Date

20250527

Claims (8)

1. 1. A pole structure, comprising: the pole body is provided with a first anti-rotation groove and a first anti-rotation positioning hole on the periphery side; The inner side edge of the aluminum ring is upwards extended to form a fence cover structure, and the upper surface of the fence cover structure is provided with a second anti-rotation groove and a second anti-rotation positioning hole; the gap between the pole body and the aluminum ring, the periphery side of the pole body and the upper surface of the enclosing wall blocking cover structure are filled with the injection molding piece; The first anti-rotation positioning holes and the second anti-rotation positioning holes are used for anti-rotation positioning when the injection molding piece is filled, and the injection molding piece is filled in the first anti-rotation groove and the second anti-rotation groove.
2. 2. The pole structure of claim 1, wherein the second anti-rotation locating hole corresponds to the first anti-rotation locating hole in position, and wherein the second anti-rotation locating hole has a hole size greater than the first anti-rotation locating hole.
3. 3. A pole structure according to claim 1, wherein the first anti-rotation locating hole is located in the first anti-rotation groove and/or the second anti-rotation locating hole is located in the second anti-rotation groove.
4. 4. The pole structure of claim 1, wherein a plurality of first rotation preventing grooves and a plurality of first rotation preventing positioning holes are formed in the periphery of the pole body at intervals, and a plurality of second rotation preventing grooves and a plurality of second rotation preventing positioning holes are formed in the upper surface of the enclosing wall cover structure at intervals.
5. 5. The pole structure of claim 1, wherein the periphery of the pole body is provided with a slope surface, the injection molding piece covers the slope surface of the pole body, and the top of the pole body protrudes out of the injection molding piece.
6. 6. The pole structure of claim 1, wherein the upper surface of the enclosure cover structure is further provided with an anti-rotation boss with an inclined surface in a protruding manner, and the injection molding piece covers the anti-rotation boss.
7. 7. A cap assembly comprising the pole structure of any one of claims 1 to 6.
8. 8. A battery comprising the post structure of any one of claims 1 to 6 or the cap assembly of claim 7.

Description

Pole structure, top cover assembly and battery Technical Field The application belongs to the technical field of batteries, and particularly relates to a pole structure, a top cover assembly and a battery. Background In the process of assembling the top cap assembly of the secondary battery, conventionally, a gap between the pole and the aluminum ring is filled in an injection filling manner to form an integral part, and then the aluminum ring and the top cap sheet are welded to complete the fixed connection between the pole and the top cap sheet. However, the structural design of the pole and the aluminum ring provided by the prior art has certain defects. In the actual injection filling operation process, the situation that the relative position is rotated often occurs between the pole and the aluminum ring, so that the assembly accuracy or precision of the pole and the aluminum ring and even the whole top cover assembly is poor, and the quality and reliability of the assembly of the top cover assembly of the secondary battery are affected. Disclosure of utility model The application aims to provide a pole structure, a top cover assembly and a battery, which are used for solving the technical problems. In order to achieve the purposes of the application, the technical scheme adopted by the application is as follows: the embodiment of the application provides a pole structure, which comprises the following components: The pole body is provided with a first anti-rotation groove and a first anti-rotation positioning hole on the periphery side; The inner side edge of the aluminum ring is upwards extended to form a fence cover structure, and the upper surface of the fence cover structure is provided with a second anti-rotation groove and a second anti-rotation positioning hole; The injection molding piece is filled in the gap between the pole body and the aluminum ring, the periphery side of the pole body and the upper surface of the enclosing wall retaining cover structure; the first anti-rotation positioning hole and the second anti-rotation positioning hole are used for anti-rotation positioning when the injection molding piece is filled, and the injection molding piece fills the first anti-rotation groove and the second anti-rotation groove. In some embodiments, the second anti-rotation locating hole corresponds to the position of the first anti-rotation locating hole, and the hole size of the second anti-rotation locating hole is greater than the hole size of the first anti-rotation locating hole. In some embodiments, the first anti-rotation locating hole is located within the first anti-rotation groove and/or the second anti-rotation locating hole is located within the second anti-rotation groove. In some embodiments, the circumference side of the pole body is provided with a plurality of first rotation preventing grooves and a plurality of first rotation preventing locating holes, wherein the first rotation preventing grooves and the first rotation preventing locating holes are distributed at intervals, and the upper surface of the enclosing wall retaining cover structure is provided with a plurality of second rotation preventing grooves and the second rotation preventing locating holes are distributed at intervals. In some embodiments, the peripheral side of the pole body is provided with a ramp surface, the injection molding covers the ramp surface of the pole body, and the top of the pole body protrudes out of the injection molding. In some embodiments, the upper surface of the enclosing wall cover structure is further provided with an anti-rotation boss with an inclined surface in a protruding mode, and the injection molding piece covers the anti-rotation boss. The embodiment of the application provides a top cover assembly, which comprises the pole structure. The embodiment of the application provides a battery, which comprises the pole structure or the top cover assembly. Compared with the prior art, the embodiment of the application has the beneficial effects that: According to the pole structure, the top cover assembly and the battery, when injection molding pieces are filled, the mutual rotation between the pole body and the aluminum ring is prevented through the anti-rotation positioning function of the first anti-rotation positioning hole and the second anti-rotation positioning hole (for example, when injection molding is carried out, the first anti-rotation positioning hole and the second anti-rotation positioning hole are inserted through the insert needle), and after injection molding is carried out, the mutual rotation between the pole body and the aluminum ring is prevented through the first anti-rotation groove and the second anti-rotation groove, so that the assembly accuracy and precision of the top cover assembly are improved. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodi