Abstract: An electrode assembly includes a first electrode plate, a second electrode plate, and a separator located between the first electrode plate and the second electrode plate; the first electrode plate includes a first current collector and a first membrane disposed on the first current collector, and the first membrane is provided with a first tab groove; and the second electrode plate includes a second current collector and a second membrane disposed on the second current collector, the second membrane is provided with a blocking groove and an alignment region defined by the blocking groove, and a projection of the alignment region on the first electrode plate covers the first tab groove.

Abstract: A gummed paper comprises a first substrate having an uncovered region on an upper surface thereof; and a second substrate, in which in a thickness direction, a projection of the second substrate partially covers a projection of the first substrate, a dyne value of an upper surface of the second substrate is greater than or equal to 40 dyn/cm, and a dyne value of the uncovered region is less than the dyne value of the upper surface of the second substrate.

Abstract: An electrode plate includes a current collector, where a functional coating and a non-coating area are provided on at least one surface of the current collector, the functional coating includes a functional area and an extension area that extends from the functional area to the non-coating area, and the extension area has a minimum thickness greater than 0 and a maximum thickness less than a thickness of the functional area. This relieves the problem of concentrated stress on the current collector in a transition area between the functional coating and the non-coating area on the electrode plate and improve mechanical property and a current conduction effect of the current collector, thereby improving properties such as cycling performance and safety of the electrochemical apparatus.

Abstract: A gummed paper includes: a first adhesive layer, configured to adhere to an object; a first substrate, adhered to a surface of the first adhesive layer opposite to the object; a second adhesive layer, adhered to a surface of the first substrate opposite to the first adhesive layer; a second substrate, adhered to a surface of the second adhesive layer opposite to the first substrate; and a plurality of foaming agent particles, distributed in the first adhesive layer.

Abstract: A gummed paper comprises a first substrate having an uncovered region on an upper surface thereof; and a second substrate, in which in a thickness direction, a projection of the second substrate partially covers a projection of the first substrate, a dyne value of an upper surface of the second substrate is greater than or equal to 40 dyn/cm, and a dyne value of the uncovered region is less than the dyne value of the upper surface of the second substrate.

Abstract: A gummed paper includes: a first adhesive layer, configured to adhere to an object; a first substrate, adhered to a surface of the first adhesive layer opposite to the object; a second adhesive layer, adhered to a surface of the first substrate opposite to the first adhesive layer; a second substrate, adhered to a surface of the second adhesive layer opposite to the first substrate; and a plurality of foaming agent particles, distributed in the first adhesive layer.