Potential sensing composite diaphragm, preparation method thereof and three-electrode intelligent battery

The invention relates to the field of batteries, and provides a potential sensing composite diaphragm and a preparation method thereof, and a three-electrode smart battery, the potential sensing composite diaphragm comprises: a porous base membrane comprising a first porous base membrane and a second porous base membrane which are oppositely arranged; the porous active layer is arranged between the first porous base membrane and the second porous base membrane, and the porous active layer has a constant potential in the battery; and the porous conductive layer is arranged on at least one side surface of the porous active layer. The potential sensing composite diaphragm has the potential sensing function of a reference electrode and is long in service life. 本申请涉及电池领域，提供了一种电位感知复合隔膜及其制备方法和三电极智能电池，电位感知复合隔膜包括：多孔基膜，包括相对设置的第一多孔基膜和第二多孔基膜；多孔活性层，设置于第一多孔基膜和第二多孔基膜之间，多孔活性层在电池中具有恒定的电位；多孔导电层，设置于多孔活性层的至少一侧表面。本申请的电位感知复合隔膜具有参比电极的电位感应功能且使用寿命长。