顶盖组件和电池

Abstract

本实用新型涉及电池技术领域，提供一种顶盖组件和电池，上述顶盖组件包括：顶盖本体、绝缘件和极柱；绝缘件设于顶盖本体朝向极组的一侧，用于将顶盖本体和极组隔开，绝缘件包括绝缘件本体、凸起部和挡边；凸起部设有两个，沿绝缘件本体的长度方向，两个凸起部分设于绝缘件本体的两端，两个凸起部朝向极组的一侧均压接于极组的表面；挡边设有两个，两个挡边分设于绝缘件本体的宽度方向的两侧，两个挡边的两端均与凸起部连接；极柱穿设于顶盖本体和绝缘件，并与极耳电连接。本实施例的顶盖组件，使得绝缘保护膜与绝缘件的热熔面积较大且热熔点能够沿顶盖本体的四周均衡的分布，提高了绝缘件和绝缘保护膜的热熔效果，增强了电池的绝缘防护。

Claims

1. A cap assembly, characterized by, include: Top cover body; An insulating component is provided on the side of the top cover body facing the electrode assembly to separate the top cover body from the electrode assembly. The insulating component includes an insulating component body, protrusions, and retaining edges. Two protrusions are provided along the length direction of the insulating component body, and the two protrusions are located at both ends of the insulating component body. The side of the two protrusions facing the electrode assembly is pressed against the surface of the electrode assembly. Two retaining edges are provided, and the two retaining edges are located on both sides of the width direction of the insulating component body. Both ends of the two retaining edges are connected to the protrusions. The electrode post passes through the top cover body and the insulating member and is electrically connected to the electrode tab.

2. The roof assembly of claim 1, wherein, The side of the retaining edge facing the electrode group is lower than the side of the protrusion facing the electrode group.

3. The roof assembly of claim 2, wherein, Along the height direction of the insulating component body, the height of the protrusion is greater than the height of the retaining edge, and the height difference ranges from 0.5 to 2 mm.

4. The roof assembly of claim 1, wherein, The height of the protrusion ranges from 3 to 8 mm; And / or, the height of the retaining edge is greater than 2mm; And / or, the height of the side of the retaining edge facing the electrode group is greater than the height of the side of the pole post facing the electrode group, and the height difference ranges from 0.5 to 3 mm.

5. The roof assembly of claim 1, wherein, The insulating component further includes: reinforcing ribs; The insulating body, the two flanges, and the two protrusions form a receiving cavity, and the reinforcing rib is disposed in the receiving cavity.

6. The roof assembly of claim 1, wherein, One end of the top cover body has a liquid injection hole that penetrates the top cover body. One of the two protrusions is disposed opposite to the liquid injection hole. The side of the protrusion facing the top cover body has a liquid injection cavity. The liquid injection hole and the liquid injection cavity are connected. The side of the protrusion facing the electrode group has at least one first through hole, which is connected to the liquid injection cavity.

7. The roof assembly of claim 6, wherein, The first through hole is provided in multiple ways. The multiple first through holes are evenly spaced on the side of the protrusion facing the electrode group and do not coincide with the projection of the injection hole on the protrusion.

8. The roof assembly of claim 6, wherein, The other of the two protrusions is provided with a weight reduction cavity, and the protrusion is provided with at least one second through hole on the side facing the pole group, the second through hole being connected to the weight reduction cavity.

9. The roof assembly of claim 1, wherein, The top cover body has a first pole hole and a second pole hole, which are spaced apart. The insulating component has a third pole hole and a fourth pole hole, which are opposite to the first pole hole and opposite to the second pole hole. The pole includes: The first pole post is inserted through the first pole post hole and the third pole post hole; The second pole is inserted through the second pole hole and the fourth pole hole.

10. A battery, characterized in that, include: The electrode assembly, the housing, and the top cover assembly as described in any one of claims 1 to 9; The electrode assembly is located inside the housing, the top cover assembly is fixed to the opening end of the housing, and the electrode assembly is electrically connected to the top cover assembly through electrode tabs.

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