A battery connection module includes an electrode connection tray and a flexible circuit board. The connection tray includes a carrying tray and a plurality of busbars. The busbars are mounted on the carrying tray. The board is configured on the connection tray, and the busbars are arranged adjacent to the board. The board includes a main body and a plurality of L-shaped flexible arms extending therefrom. Each L-shaped flexible arm is configured to be movably connected with a respective one of the busbars. Each L-shaped flexible arm includes a first section, a second section and an end portion. The first section extends outwardly from the main body toward the busbars. The second section connects with the first section and extends in a direction between the busbars and the main body. The end portion is positioned at a distal end of the second section and connects with the corresponding busbar.