Disclosed is an electrode assembly in which a plurality of electrode plates are stacked so that a separator is interposed between a positive electrode plate and a negative electrode plate, wherein each of the electrode plates includes an electrode tab protruding outwards at one side thereof for coupling with an electrode lead, wherein at least one electrode plate of the positive electrode plate and the negative electrode plate extends relatively longer than the separator at one end of the electrode plate where the electrode tab is located to form the electrode plate extension protruding out of the separator, and wherein the electrode plate extensions of the same polarity are coupled to each other.

A film covered battery has a battery element equipped with a plurality of electrode plates laminated via separators, and an exterior film for hermetically sealing the battery element. A cover film is attached to a hollow present in predetermined regions set on a surface of the exterior film. The predetermined regions are regions obtained by removing overlap regions from projected regions obtained by projecting the electrode plates to the surface of the exterior film, the overlap regions being regions where the projected regions overlap with members interposed between the electrode plates at the outermost layers and the exterior film. It is possible to cover the hollow on the surface, without increasing the thickness of the film covered battery.

The present disclosure discloses an electric connector and a battery comprising the same. The electric connector includes a leading-out sheet, and a plurality of connecting sheets welded to the leading-out sheet, each connecting sheet comprising at least two welding portions; wherein the leading-out sheet and each connecting sheet are separate parts. The electric connector according to the present disclosure is convenient in welding, simple in structure, low in process cost, stable and reliable in structure and high in safety.

A cylindrical battery including an electrode body in which a negative electrode plate and a positive electrode plate to which a plurality of positive electrode leads is connected are wound with a separator interposed therebetween; an upper insulating plate disposed on the electrode body; a positive electrode current collector plate disposed on the upper insulating plate; a sealing body; and an outer can. A first positive electrode lead extends between the upper insulating plate and the current collector plate after passing through a through-hole of the upper insulating plate and is bent onto the current collector plate at an outer circumference portion thereof, and a second positive electrode lead extends along the outside of an outer circumference portion of the upper insulating plate and is bent onto the current collector plate at the outer circumference portion thereof. Those positive electrode leads are all connected to the current collector plate.

Batteries and methods of forming the same include an anode structure, a cathode structure, and a conductive overcoat. The anode structure includes an anode substrate, an anode formed on the anode substrate, and an anode conductive liner that is in contact with the anode. The cathode structure includes a cathode substrate, a cathode formed on the cathode substrate, and a cathode conductive liner that is in contact with the cathode. The conductive overcoat is formed over the anode structure and the cathode structure to seal a cavity formed by the anode structure and the cathode structure. At least one of the anode substrate and the cathode substrate is pierced by through vias that are in contact with the respective anode conductive liner or cathode conductive liner.

A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator includes a substrate layer and a surface layer formed on at least one principal plane of the substrate layer, the surface layer contains polyvinylidene fluoride and an inorganic material particle, and an amount of deformation against pressure of the surface layer is larger than that of the substrate layer.

A cathode element is formed as a continuous single element with a plurality of cathode leaves connected by cathode bridges. An anode element is similarly formed as a continuous single element with a plurality of anode leaves connected by anode bridges. The cathode element and anode element can be aligned and interleaved at spaces between adjacent leaves. The resulting battery pre-stack can then be folded along its bridges in alternating directions to form a battery stack whose layers alternate between an anode and cathode, and which requires minimal components and minimal or no welds.

An electrode arrangement of a battery cell (10) comprising a positive electrode layer (2) and a negative electrode layer (3), which are separated from one another in an electrically insulating manner by a separator layer (4), wherein the positive electrode layer (2) forms a plurality of first contacting sections (21) formed in each case for an electrical contacting of the positive electrode layer (2) by a first current conductor (81), and the negative electrode layer (3) forms a plurality of second contacting sections (31) formed in each case for an electrical contacting of the negative electrode layer (3) by a second current conductor (82).

An electrode assembly includes a unit cell A in which a first electrode 110, a second electrode 120, and a separator 130 disposed between the first and second electrodes 110 and 120 are stacked on each other or a structure in which the unit cells A are repeatedly stacked with the separator therebetween. A first electrode tab 111 protrudes from the first electrode 110, and a second electrode tab 121 protrudes from the second electrode 120, and the electrodes tabs 111 and 121 have widths that gradually decrease in directions in which the electrodes tabs 111 and 121 protrude outward from the electrodes 110 and 120, respectively.

A method for producing an electrically conductive paste, including a step of manufacturing paste A by exerting a cavitation effect in mixed liquid A containing multi-walled carbon nanotubes and a solvent, a step of manufacturing paste B from mixed liquid B containing carbon black particles, graphitized carbon nanofibers and a solvent, and a step of mixing paste A and paste B.