Housing assembly, battery, battery pack and power-consuming device

Abstract

Housing assembly, characterized in that it comprises: a housing body (100) wherein the housing body (100) has a first wall (110); a pole pin (200) wherein the pole pin (200) is arranged on the first wall (110); a terminal plate (300) wherein the terminal plate (300) is located on the outside of the housing body (100) and is electrically connected to the pole pin (200), wherein along the width direction of the first wall (110) the maximum length of the terminal plate (300) is a1 mm, along the thickness direction of the first wall (110) the maximum length of the terminal plate (300) is d1 mm, and a1 / d1 ≥ 2.4;wherein the connecting plate (300) comprises a first area (310) and a second area (320), the second area (320) being arranged on the outside around the first area (310), and the surface of the first area (310) facing away from the first wall (110) being on the side of the second area (320) facing away from the first wall (110).