Disclosed here is a battery including: an exterior body having a bottom wall; and a winding electrode body in which positive electrode, negative electrode and separator are wound about a winding axis. The winding electrode body has a flat shape having a pair of curvature parts having a curved outside surface and a flat part that connects the pair of curvature parts to each other and has a flat outside surface. When a line perpendicular to the winding axis of the winding electrode body and perpendicular to the bottom wall of the exterior body is assumed as L1, a portion positioned at an outermost periphery of the negative electrode in at least one of the pair of the curvature parts faces a portion positioned on a winding inner peripheral side of the negative electrode via the separator and not via the positive electrode on the line L1.

The present disclosure relates to a secondary battery and a battery module. The secondary battery comprises a case, comprising a base plate and a side plate connected with the base plate, wherein the base plate and the side plate form a receiving hole and an opening in communication with the receiving hole, the opening is arranged opposite to the base plate in an axial direction of the receiving hole, and the base plate has a thickness larger than that of the side plate; a cap assembly, sealingly connected with the side plate to close the opening; and an electrode assembly, disposed in the receiving hole and comprising two or more electrode units, which are stacked in the axial direction, and each electrode unit is arranged with a wide side opposite to the base plate and a narrow side toward the side plate.

The present application relates to a current collector and a secondary battery. The current collector is used to electrically connect a pole and tab of a secondary battery, and comprises: a first sheet; a second sheet that is disposed to intersect the first sheet, the second sheet being used to electrically connect to the pole; a current collection unit, the current collection unit and the second sheet being disposed at two opposite sides of the first sheet in a first thickness direction thereof, and the first thickness direction thereof intersecting with a second thickness direction of the second sheet; the current collection unit comprises a first current collection sheet, the first current collection sheet is used to electrically connect to the tab, and the first current collection sheet is provided with a first connection terminal that is connected to the first sheet.

An electrode assembly includes a cell stack part having (a) a structure in which one kind of radical unit is repeatedly disposed, or (b) a structure in which at least two kinds of radical units are disposed in a predetermined order. The one kind of radical unit has a four-layered structure in which first electrode, first separator, second electrode and second separator are sequentially stacked or a repeating structure in which the four-layered structure is repeatedly stacked. Each of the at least two kinds of radical units are stacked by ones to form the four-layered structure or the repeating structure. The separator has a larger size than the electrode to expose an edge part of the separator to outside of the electrode and the separator. The edge parts of the separators included in one radical unit or in the cell stack part are attached to form a sealing part.

Provided is a system for manufacturing a secondary battery including: a positive electrode cell manufacturing line having a positive electrode single cell, on which a positive electrode tab is processed on one end of a positive electrode and a first separator is combined on one surface of the positive electrode, is continuously manufactured; a negative electrode cell manufacturing line having a negative electrode single cell, on which a negative electrode tab is processed on one end of a negative electrode and a second separator is combined on one surface of the negative electrode, is continuously manufactured; and a stacking part alternately receiving positive electrode single cells and negative electrode single cells respectively from the positive electrode cell manufacturing line and the negative electrode cell manufacturing line to stack the positive electrode single cells and the negative electrode single cells up to a predetermined layer, thereby forming a stack cell.

The present invention relates to a method for inspection of a multilayer electrode sheet for a battery cell, comprising at least the following steps: joining together at least two functional layers; connecting the functional layers to form an electrode-separator assembly; detecting at least part of a surface of the electrode-separator assembly by means of a detection device for generating a measurement result; evaluating the generated measurement result and generating an evaluation result; and outputting the evaluation result.

A metal hydrogen battery is presented. The metal hydrogen batter includes an electrode stack, the electrode stack including alternating anode assemblies and cathode assemblies, the anode assemblies and cathode assemblies separated by a separator, each of the anode assemblies including at least one anode layer connected to an anode bus, each of the cathode assemblies including at least one cathode layer connected to a cathode bus, wherein each of the anode buses are electrically and mechanically attached to form an anode conductor, and wherein each of the cathode buses are electrically and mechanically attached to form a cathode conductor. The electrode stack is positioned in a pressure vessel, the pressure vessel including a side wall, a cathode end plate, and an anode end plate. Finally, an electrolyte is contained within the pressure vessel.

In some embodiments, high-energy additive manufacturing (HE-AM) (e.g., directed energy deposition, powder injection, powder bed fusion, electron beam melting, solid-state, and ultrasonic) is used to overcome constraints of comparative EES fabrication techniques to produce chemical additive-free electrodes with complex, highly versatile designs for next generation EES. An exemplary rapid fabrication technique provides an approach for improving electrochemical performance while increasing efficiency and sustainability, reducing time to market, and lowering production costs. With this exemplary technique, which utilizes computer models for location specific layer-by-layer fabrication of three-dimensional parts (e.g., versatile design), a high degree of control over processing conditions may be achieved to enhance both the design and performance of EES systems.

An electrode assembly, in which a plurality of unit electrodes and a plurality of separators are alternately laminated, is provided. Each of the unit electrodes is provided by connecting a plurality of electrodes, each electrode being entirely made of a solid electrode mixture, to each other, and the solid electrode mixture including a mixture of an electrode active material with at least one or more of a conductive material and a binder.

Disclosed in the present invention is a secondary battery in which retainers are coupled between a case and the uncoated portions of electrode assemblies so that the electrode assemblies and current collectors can be fixed and prevented from being separated. Disclosed in one embodiment is a secondary battery comprising: a plurality of electrode assemblies of which each has a cathode plate and an anode plate arranged with a separator therebetween, and which includes the uncoated portions of the cathode plate and the anode plate; a case in which the electrode assemblies are embedded; a cap plate coupled to the case; current collectors respectively coupled to the uncoated portions of the plurality of electrode assemblies through a plurality of coupling portions; and retainers inserted and coupled to on one side of the current collectors, wherein the retainers are coupled to the current collectors through protrusion portions having a width greater than that between the coupling portions of the current collectors.