A battery module, a device, and a failure handling method for a failed battery cell. The battery module includes: a battery cell arrangement structure, including a plurality of battery cells arranged along a length direction, where the battery cells include electrode terminals, and the battery cells include a failed battery cell; a box body, having an accommodation cavity in which the battery cell arrangement structure is located; a mounting beam, located in the accommodation cavity and at an end of the battery cell arrangement structure along the width direction; a pressing plate; and a conductive component, connected to a positive electrode terminal and a negative electrode terminal of the failed battery cell. The conductive component is easily connected to electrode terminals of a failed battery cell, so that a maintenance process can be simplified and maintenance costs can be reduced.

A battery module, a device, and a failure handling method for a failed battery cell. The battery module includes: a battery cell arrangement structure, including a plurality of battery cells arranged along a length direction, where the battery cells include electrode terminals, and the battery cells include a failed battery cell; a box body, having an accommodation cavity in which the battery cell arrangement structure is located; a mounting beam, located in the accommodation cavity and at an end of the battery cell arrangement structure along the width direction; a pressing plate; and a conductive component, connected to a positive electrode terminal and a negative electrode terminal of the failed battery cell. The conductive component is easily connected to electrode terminals of a failed battery cell, so that a maintenance process can be simplified and maintenance costs can be reduced.

A battery includes a power generating element including a positive electrode layer, a negative electrode layer, and an electrolyte layer, an inner terminal electrode electrically connected to the power generating element, and a laminate film accommodating the power generating element and the inner terminal electrode. The laminate film includes a metal layer, an inner resin layer located closer to the power generating element than the metal layer, and an outer resin layer on an opposite side of the metal layer from the inner resin layer. The inner resin layer has an inner opening through which the metal layer is exposed. The inner terminal electrode is electrically connected to the metal layer through the inner opening. The inner terminal electrode and the metal layer each have an uneven surface over a contact area between the inner terminal electrode and the metal layer. The uneven surfaces engage with each other.

A battery includes a power generating element including a positive electrode layer, a negative electrode layer, and an electrolyte layer, an inner terminal electrode electrically connected to the power generating element, and a laminate film accommodating the power generating element and the inner terminal electrode. The laminate film includes a metal layer, an inner resin layer located closer to the power generating element than the metal layer, and an outer resin layer on an opposite side of the metal layer from the inner resin layer. The inner resin layer has an inner opening through which the metal layer is exposed. The inner terminal electrode is electrically connected to the metal layer through the inner opening. The inner terminal electrode and the metal layer each have an uneven surface over a contact area between the inner terminal electrode and the metal layer. The uneven surfaces engage with each other.

A terminal component for a secondary battery disclosed herein has a platelike head portion with a bottom surface and an upper surface in an opposite side to the bottom surface and a shaft portion extending from the bottom surface. The terminal component includes a first metal, and a second metal joined to the first metal and having a higher ductility than that of the first metal. The bottom surface of the head portion is formed of the first metal. The upper surface of the head portion is formed of the second metal. A circumferentially continuous chamfered portion is provided in an outer end portion of the bottom surface of the head portion. A boundary between the first metal and the second metal is formed in the chamfered portion.

A terminal component for a secondary battery disclosed herein has a platelike head portion with a bottom surface and an upper surface in an opposite side to the bottom surface and a shaft portion extending from the bottom surface. The terminal component includes a first metal, and a second metal joined to the first metal and having a higher ductility than that of the first metal. The bottom surface of the head portion is formed of the first metal. The upper surface of the head portion is formed of the second metal. A circumferentially continuous chamfered portion is provided in an outer end portion of the bottom surface of the head portion. A boundary between the first metal and the second metal is formed in the chamfered portion.

A secondary battery has increased space utilization efficiency and can increase a capacity of an electrode assembly within a given dimension. In an exemplary embodiment, a secondary battery includes: an electrode assembly including an electrode uncoated portion; a case receiving the electrode assembly; a cap plate coupled to a top portion of the case and sealing the case; and a current collector including a terminal connector positioned between the electrode assembly and the cap plate, and an electrode connector bent at an end of the terminal connector and positioned between the electrode assembly and the case, and the electrode connector includes a first region connected to the terminal connector and protruding toward the case, and a second region positioned under the first region and protruding toward the electrode assembly.

Presented are metalworking systems for forming metallic workpieces, methods for making such workpieces and methods for operating such systems, and battery cell tabs bent by a multistage plunger press. A metalworking system includes a plunger fixture that mounts adjacent metallic workpieces, and a plunger head movably mounted to the plunger fixture to move between activated and deactivated positions. A first row of plunger fingers is mounted to the plunger head and moves in one direction to press against and bend one metallic workpiece a predefined bend angle. Likewise, a second row of plunger fingers is mounted to the plunger head and moves in an opposite direction to press against and bend another metallic workpiece another predefined bend angle. The plunger head then moves to the activated position, in tandem with the plunger fingers bending the metallic workpieces, to cause the plunger fingers to bend the workpieces additional respective bend angles.

Presented are metalworking systems for forming metallic workpieces, methods for making such workpieces and methods for operating such systems, and battery cell tabs bent by a multistage plunger press. A metalworking system includes a plunger fixture that mounts adjacent metallic workpieces, and a plunger head movably mounted to the plunger fixture to move between activated and deactivated positions. A first row of plunger fingers is mounted to the plunger head and moves in one direction to press against and bend one metallic workpiece a predefined bend angle. Likewise, a second row of plunger fingers is mounted to the plunger head and moves in an opposite direction to press against and bend another metallic workpiece another predefined bend angle. The plunger head then moves to the activated position, in tandem with the plunger fingers bending the metallic workpieces, to cause the plunger fingers to bend the workpieces additional respective bend angles.

A manufacturing method for the secondary battery includes a first preparation step for inserting a terminal formed in an oval like shape and having a cylindrical shaft part into an attachment hole formed on a sealing plate of the secondary battery, a second preparation step for arranging a conductive member on a surface at a side where the shaft part of the sealing plate protrudes, a first caulking step for using a caulking tool that includes a tip end part formed in an oval like shape and includes a base end part formed in a complete round shape whose diameter is larger than the tip end part, to insert the tip end part into the shaft part, so as to make the base end part expand an inner diameter of the shaft part, and a second caulking step for pressing an expanded portion of the shaft part to be flat.