Battery module and connection piece thereof

The utility model relates to a battery module and connection piece thereof, including a plurality of cell and a pair of connection piece. Each cell has two relative electrodes, a pair of connection piece correspond to set up the opposite side at these cell, and the connection piece be the metal sheet, and including the base plate and correspond cell and a plurality of linking arms of setting up, the linking arm contains the constriction section of connecting the base plate and reaches the weld part from the extension of constriction section, and this constriction section is long and narrow form, and the weld part extends to each cell's electrode position department, provides the protection mechanism to battery module from this. 本实用新型是种电池模块及其连接片，包括多个电池单元及对连接片。各电池单元具有相对的两个电极；对连接片对应设置在这些电池单元的相对侧，连接片为金属板，包括基板及对应电池单元而设置的多个连接臂，连接臂包含连接基板的颈缩段及自颈缩段延伸的焊接部，该颈缩段呈狭长状，焊接部延伸至各电池单元的电极位置处，由此对电池模块提供保护机制。