顶盖组件及电池

Abstract

本实用新型实施例公开了一种顶盖组件及电池，涉及新能源电池技术领域。顶盖组件包括顶盖片、极柱和上绝缘件，顶盖片具有通孔，极柱设置于通孔内，上绝缘件位于顶盖片和极柱之间；极柱的外周设有限位部，顶盖片的外侧表面在通孔边缘设置有第一环圈，第一环圈包括向极柱中心线方向延伸的第一部分，第一部分与顶盖片围成第一凹槽，上绝缘件包覆第一环圈，且部分设置在第一凹槽内，上绝缘件还包括配合部，配合部与限位部卡合连接实现轴向限位，通过上绝缘件能够限制极柱的轴向位移，使得极柱通过上绝缘件固定在顶盖片上，无需将极柱铆接到顶盖片上再进行包胶，从而减少制作工序。

Claims

1. A cap assembly, characterized by, The top cover assembly includes a top cover plate, an electrode post, and an upper insulating member. The top cover plate has a through hole, the electrode post is disposed within the through hole, and the upper insulating member is located between the top cover plate and the electrode post. A limiting portion is provided on the outer periphery of the electrode post. A first annular ring is provided on the outer surface of the top cover plate at the edge of the through hole. The first annular ring includes a first portion extending towards the center line of the electrode post. The first portion and the top cover plate form a first groove. The upper insulating member covers the first annular ring and is partially disposed within the first groove. The upper insulating member also includes a mating portion, which engages with the limiting portion to achieve axial limiting.

2. The roof assembly of claim 1, wherein, The limiting part and the mating part are respectively a protrusion and a depression.

3. The roof assembly of claim 1, wherein, The outer surface of the top cover and the end of the upper insulating member connected to the top cover are respectively provided with positioning grooves and positioning protrusions that engage with each other.

4. The roof assembly of any one of claims 1-3, wherein, It also includes a sealing ring and a lower insulating component, the sealing ring being sleeved outside the pole post, and the lower insulating component being disposed on the inner surface of the top cover plate.

5. The roof assembly of claim 4, wherein, The first ring also includes a second portion connected to the first portion, the second portion being disposed between the top cover and the first portion, and the second portion extending in a direction away from the top cover.

6. The roof assembly of claim 5, wherein, The inner surface of the top cover plate is provided with a second ring at the edge of the through hole, and the first ring, the top cover plate and the second ring surround to form a second groove, and at least part of the sealing ring is provided in the second groove.

7. The roof assembly of claim 6, wherein, The outer surface of the end of the pole near the lower insulator is provided with a third groove, and the lower insulator is provided with a hook, which is engaged in the third groove.

8. The roof assembly of claim 5, wherein, The end of the pole located inside the top cover plate has a pressing part protruding outward. The pressing part at least partially overlaps with the first ring in the axial direction. The sealing ring is disposed between the pressing part and the first ring.

9. The roof assembly of claim 8, wherein, The lower insulating component is provided with a hook, which is engaged with the pressing part.

10. A battery, characterized by The battery includes a housing, a cell, and a top cover assembly as described in any one of claims 1-9, wherein the housing and the top cover assembly enclose a closed space, and the cell is fixed within the closed space.

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