Expansion block and vehicle

The expansion block can be applied to the vehicle, the vehicle comprises a vehicle body metal plate, the expansion block comprises a framework, a first thermal expansion material layer and a welding part, the first thermal expansion material layer is arranged on the framework, the welding part is fixedly connected to the framework, and the welding part is used for being connected with the vehicle body metal plate in a welded mode. According to the scheme, the problems that in the related technology, the expansion block and the automobile body metal plate are connected through a buckle structure, an installation hole needs to be formed in the automobile body metal plate, and the sealing performance of the installation hole is difficult to guarantee can be solved. 本申请公开一种膨胀块及车辆，所公开的膨胀块可应用于车辆，车辆包括车身钣金，膨胀块包括骨架、第一热膨胀材料层和焊接件，第一热膨胀材料层设于骨架，焊接件固定连接于骨架，焊接件用于与车身钣金焊接相连。上述方案能够解决相关技术中通过卡扣结构连接膨胀块和车身钣金，需要在车身钣金上开设安装孔，难以保证安装孔的密封性能的问题。