Battery gas production rate detection method and device and soft package battery

The invention provides a battery gas production rate detection method and device and a soft package battery, which are applied to battery gas production rate detection, and the battery gas production rate detection device comprises at least one flexible bending angle sensor. The flexible bending angle sensor is integrally adhered to an area from the center of a hole position of an aluminum-plastic film on a tab side of the soft package battery to a heat-sealing edge of the aluminum-plastic film of the soft package battery. The method comprises the following steps: recording a bending angle measured by the flexible bending angle sensor in real time; based on the bending angle and a preset bending data comparison table, the battery gas production rate of the soft package battery is obtained; wherein the preset bending data comparison table comprises the corresponding relation between the bending angle and the gas production rate of the battery, and the corresponding relation between the bending angle and the ga