A terminal component includes a first metal and a second metal overlapped on the first metal. At least three biting portions in which an edge of one of the first metal and the second metal bites into the other metal is provided at an interface where the first metal and the second metal are overlapped.

Battery parts having retaining and sealing features and associated assemblies and methods are disclosed herein. In one embodiment, a battery part includes a base portion that is configured to be embedded in battery container material of a corresponding battery container. The battery part and base portion include several torque resisting features and gripping features that resist torsional or twist loads that are applied to the battery part after it has been joined to the battery container. For example, the base portion can include several internal and external torque resisting features and gripping features that are configured to resist twisting or loosening of the battery part with reference to the battery container material, as well as prevent or inhibit fluid leakage from the battery container.

Disclosed is a battery cell with improved weldability and an apparatus for processing the same, and more particularly to a battery cell including an electrode assembly received in a cell case; and a pair of electrode leads constituted by a negative electrode lead and a positive electrode lead protruding outwards from the cell case, wherein: the negative electrode lead is made of a nickel material and is provided with one or more embossed portions, and the positive electrode lead is made of an aluminum material and is provided with no embossed portion.

A method and an apparatus for electrical contacting of cells of a battery. The method includes: using a laser beam having a first beam energy to remove contamination in a region, provided for electrical contacting, of an electrically conductive outer surface of a first cell of the battery; using a laser beam having a second beam energy higher than the first, to generate at least one marking in the outer surface of the first cell, the marking having a predefined spatial relationship to the region provided for electrical contacting; and electrically contacting the first cell using a connecting apparatus, the marking being used by the connecting apparatus to localize that region of the first cell which is provided for electrical contacting in order to connect said region by way of an electrically conductive connecting element to a region, provided for electrical contacting, of a second cell of the battery.

A method and an apparatus for electrical contacting of cells of a battery. The method includes: using a laser beam having a first beam energy to remove contamination in a region, provided for electrical contacting, of an electrically conductive outer surface of a first cell of the battery; using a laser beam having a second beam energy higher than the first, to generate at least one marking in the outer surface of the first cell, the marking having a predefined spatial relationship to the region provided for electrical contacting; and electrically contacting the first cell using a connecting apparatus, the marking being used by the connecting apparatus to localize that region of the first cell which is provided for electrical contacting in order to connect said region by way of an electrically conductive connecting element to a region, provided for electrical contacting, of a second cell of the battery.

A secondary battery including an electrode body including a positive electrode plate and a negative electrode plate; an exterior body that has an opening and houses the electrode body; a sealing body that seals the opening; a terminal that is provided in the sealing body, and connected to the positive electrode plate or the negative electrode plate; and a conductive member that is disposed on an outer side of the sealing body, and is connected to the terminal. The conductive member has an overlap section in which one end of a conductive plate-shaped member is folded and opposed surfaces are overlaid on other, and a base section in which no surfaces are overlaid on other, and the terminal is connected to the conductive member in the base portion.

A secondary battery including an electrode body including a positive electrode plate and a negative electrode plate; an exterior body that has an opening and houses the electrode body; a sealing body that seals the opening; a terminal that is provided in the sealing body, and connected to the positive electrode plate or the negative electrode plate; and a conductive member that is disposed on an outer side of the sealing body, and is connected to the terminal. The conductive member has an overlap section in which one end of a conductive plate-shaped member is folded and opposed surfaces are overlaid on other, and a base section in which no surfaces are overlaid on other, and the terminal is connected to the conductive member in the base portion.

A secondary battery includes an electrode body that includes a positive electrode plate and a negative electrode plate; an outer body that houses the electrode body; a sealing plate that is made of metal and seals an opening of the outer body; and a positive electrode terminal that is electrically connected to the positive electrode plate. At least part of the positive electrode terminal is disposed on the battery outer side with respect to the sealing plate. An external insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. The conduction path between the positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. An electrically insulating, heat-resistant layer is disposed between the positive electrode terminal and the sealing plate.

A battery includes: a conductive member provided with a through hole; and a terminal member inserted in the through hole and having a tip portion exposed on the conductive member. A joined portion of the tip portion of the terminal member to the conductive member is formed. The joined portion includes a thick portion at which a thickness of the terminal member is relatively thick, and a thin portion at which the thickness of the terminal member is relatively thin.

A battery includes: a conductive member provided with a through hole; and a terminal member inserted in the through hole and having a tip portion exposed on the conductive member. A joined portion of the tip portion of the terminal member to the conductive member is formed. The joined portion includes a thick portion at which a thickness of the terminal member is relatively thick, and a thin portion at which the thickness of the terminal member is relatively thin.