Battery pack, battery module, battery unit, and electrical device

Abstract

A battery pack, a battery module, a battery unit, and an electrical device, relating to the technical field of batteries. An accommodating space (11) is formed inside a case (1) of the battery pack, and at least one battery unit is located in the accommodating space (11). Each battery unit comprises a casing (21) and at least one pouch cell (22); a cell cavity (211) is formed inside the casing (21); the at least one pouch cell (22) is provided in the cell cavity (211); at least one side of the casing (21) is provided with an electrode assembly (23) for electrically connecting to other structures; at least one side of the casing (21) is provided with a pressure relief port (212) for pressure relief; and the electrode assembly (23) and the pressure relief port (212) are located on different sides of the casing. Thermal runaway gas in the cell cavity (211) is ejected from the pressure relief port (212) under the guidance of the casing (21), so that gas emitted during thermal runaway of the battery unit is ejected in a preset direction, thereby realizing directional ejection of the thermal runaway gas of the battery unit. The electrode assembly (23) and the pressure relief port (212) are located on different sides of the casing, so that the thermal runaway gas ejected from the pressure relief port can avoid the electrode assembly (23) as much as possible.

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