A battery cover plate assembly includes a cover plate, an electrode terminal, a current interrupt structure, and an arc extinguishing portion. The electrode terminal is disposed on the cover plate and includes an electrode inner terminal and an electrode outer terminal. The electrode inner terminal and the electrode outer terminal are electrically connected through the current interrupt structure. The current interrupt structure is capable of disrupting the electrical connection between the electrode inner terminal and the electrode outer terminal under the action of a gas pressure. The arc extinguishing portion is configured to reduce an electric arc generated when the current interrupt structure disrupts the electrical connection between the electrode inner terminal and the electrode outer terminal. When the electrical connection between the electrode inner terminal and the electrode outer terminal is disrupted, an arcing effect is generated due to high voltages at positive and negative electrodes of the battery.

A plating layer 4 is formed on a surface of a battery cover 3, and a peripheral edge part 37b of a cover case 37 is arranged on an upper surface of the plating layer 4. A welding part 40 is formed at a tip part of the peripheral edge part 37b. The welding part 40 includes a melted part 41 in which the tip of the peripheral edge part 37b is melted, and an elution part 42 flowing from the tip onto the plating layer 4, and the melted part 41 and the elution part 42 are welded to the plating layer 4 in the upper surface of the plating layer 4.

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case that is connected to the first electrode and accommodates the electrode assembly, and includes an opening; a cap plate that is coupled to the case to cover an outer area of the opening and includes a through-hole exposing a central area of the opening; a terminal plate that is connected to the second electrode and is insulation-bonded to the cap plate so as to cover the through-hole; and a thermal-fusion layer that is positioned between the cap plate and the terminal plate and insulation-bonds the cap plate and the terminal plate, and the cap plate includes a plating layer that is directly bonded to the thermal-fusion layer.

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case accommodating the electrode assembly and connected to the first electrode, the case having an opening exposing the electrode assembly; a cap plate coupled with the case and covering an outer region of the opening in the case, the cap plate having an opening exposing a central region of the opening in the cap plate and including an insulation layer coated on a surface thereof corresponding to the opening in the cap plate; and a terminal portion connected with the second electrode and bonded in an insulated manner to the cap plate. The terminal portion covers the opening in the cap plate, and the terminal portion includes a plating layer that is directly bonded to the insulation layer of the cap plate.

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a case connected to the first electrode and accommodating the electrode assembly, the case including an opening to receive the electrode assembly; a cap plate bonded to the case to cover an outer region of the opening and including a through-hole to expose a center region of the opening; a terminal plate bonded to and insulated from the cap plate, covering the through-hole, and connected to the second electrode; and a terminal plating layer coated on an upper surface of the terminal plate, and a thickness of a center portion of the terminal plating layer overlapping the through-hole is thicker than a thickness of an outer portion of the terminal plating layer overlapping the upper surface of the terminal plate.

The present disclosure relates to an energy storage device improved in reliability and durability. The energy storage device includes: an electrode element including an anode plate, a separator, and a cathode plate; a housing configured to accommodate the electrode element; a terminal plate configured to cover an opened top surface of the housing; and electrode terminals protruding to an outside of the terminal plate and including an anode terminal, a cathode terminal, and two terminal pins. The terminal plate includes a metal member and a sealing member that surrounds a top surface and a bottom surface of the metal member, and an outermost side surface between the top surface and the bottom surface, and the sealing member includes an outer upper horizontal portion, an outer lower horizontal portion, and an outer vertical portion disposed between the housing and the metal member.

The present disclosure relates to composite battery covers including one or more integral vent members configured to release pressure. An example composite battery cover includes a continuous sheet having a first stiffness and one or more vent members defined in the continuous sheet. Each of the one or more vent members may include a first area having a second stiffness and/or a second area having a third stiffness. The second stiffness may be different from the first stiffness. The third stiffness may be different from the second stiffness and/or the first stiffness. The stiffness and strength of the continuous sheet and/or one or more vent members may be controlled by variable thicknesses and/or fiber loadings.

The present disclosure relates to composite battery covers including one or more integral vent members configured to release pressure. An example composite battery cover includes a continuous sheet having a first stiffness and one or more vent members defined in the continuous sheet. Each of the one or more vent members may include a first area having a second stiffness and/or a second area having a third stiffness. The second stiffness may be different from the first stiffness. The third stiffness may be different from the second stiffness and/or the first stiffness. The stiffness and strength of the continuous sheet and/or one or more vent members may be controlled by variable thicknesses and/or fiber loadings.

A peel off assembly for exposing a safety feature comprising an aversive agent for a battery includes a first adhesive layer adhered to a base layer. Optionally, a layer comprising a colorant is disposed over and coupled to the first adhesive layer. A layer comprising a water-soluble material and an aversive agent is disposed over and coupled to the first adhesive layer. A second adhesive layer is disposed over and coupled to the layer comprising a water-soluble material. A kill strip layer is disposed between the second adhesive layer and the base layer. Optionally, a label is disposed over and coupled to the second adhesive layer. The second adhesive layer is adapted and arranged to release from the layer comprising the water-soluble material, when a peel force is applied such that the second adhesive layer and the kill strip layer are removable from the layer comprising a water-soluble material when the peel force is applied to the second adhesive layer.

Method of producing a low interfacial contact resistance material for use in batteries or connectors and a low interfacial contact resistance material for use in batteries or connectors produced thereby.