Abstract: 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.

Abstract: An anode includes: (1) a current collector; and (2) an interfacial layer disposed over the current collector. The interfacial layer includes a film of a layered material and a reinforcing material selectively disposed over certain regions of the film, while other regions of the film remain exposed from the reinforcing material.

Abstract: A battery comprises a first polarity terminal that is attached via a first insulating member to an opening of an outer case. A first polarity plate includes: a first core formed of a conductive material; and a first active material layer. A first drawn-out portion is formed from a side of the first core on the first polarity terminal side thereof being drawn further out than a side of the first active material layer on the first polarity terminal side thereof. The first drawn-out portion includes a first bent portion that is bent towards the radially inner or outer side of the electrode body. A first surface of a first polarity collector plate contacts the surface of the first bent portion on the first polarity terminal side, and the first polarity terminal connects directly or via a conductive member to a second surface of the first polarity collector plate.

Abstract: An all-solid secondary battery including: an anode layer including a first anode active material layer; a cathode layer including a cathode active material layer; a solid electrolyte layer between the anode layer and the cathode layer; and an anode current collector on the anode layer and opposite the solid electrolyte layer, wherein a maximum roughness depth Rmax of a surface of the first anode active material layer is about 3.5 micrometers or less.

Abstract: A short circuit current interruption method of a battery system including: stacking a plurality of prismatic battery cells and connecting the plurality of prismatic battery cells with a parallel connection bus bar in parallel to form a battery block, wherein a sealing plate of the prismatic battery cell is a plate material having flexibility that deforms when an internal pressure rises due to an internal short circuit, and when a rise in the internal pressure due to the internal short circuit of the prismatic battery cell causes deformation, the deformation of the sealing plate is detected, and when an amount of deformation exceeds a setting value, the short circuit current of the battery connected in parallel with the internally short circuited battery is interrupted.

Abstract: A secondary battery includes an electrode assembly formed by alternately stacking an electrode and a separator; a battery case that accommodates the electrode assembly therein; a plurality of electrode tabs protruding from the electrode assembly; a plurality of electrode leads, each of which has one end connected to one of the plurality of electrode tabs and another end protruding to an outside of the battery case; and a short-circuit induction part which has a wire shape, wherein ends of the short-circuit induction part are respectively disposed on a sealing part of the battery case that seals the plurality of electrode leads in the battery case, and wherein the ends of the short-circuit induction part are configured to respectively extend toward the plurality of electrode leads to contact the plurality of electrode leads when reaching a specific temperature.

Abstract: A silicon negative electrode sheet includes: a current collector; and at least two active coatings containing negative active materials, which are sequentially coated on the current collector. Through holes are formed on the active coating along the thickness direction and are arranged at intervals. The liquid holding capacity of the silicon negative electrode sheet and the charging capacity of a silicon negative electrode can be improved.

Abstract: A secondary battery having an improved current-collecting structure is provided. In an example embodiment, the secondary battery includes an electrode assembly including a plurality of unit electrode plates each including a pair of non-coating portion tabs at a first side and a plurality of separators each located between the unit electrode plates; and a current collector plate welded to the non-coating portion tabs, and the current collector plate is welded in a state in which the pair of non-coating portion tabs are bent in opposite directions. The pair of non-coating portion tabs are bent in opposite directions to then be welded to the current collector plate, and welding may be complementarily performed, thereby securing electrical stability.