A battery including a separator film, a plurality of cathodes, each having a cathode base, a first end of each cathode base having a cathode connection portion extending contiguously across the width of the cathode base and free of a cathode material, the battery including a plurality of anodes, each having an anode base, a first end of each anode base having an anode connection portion extending contiguously across the width of the anode base and free of an anode material, and the anode connection portion. The cathodes and anodes are in an electrode stack with alternating anodes and cathodes and each separated by a portion of the separator film. Each cathode connection portion of each cathode connected to a bus bar at a first end of the battery, and each anode connection portion electrically connected to a bus bar disposed at a second end of the battery.

The disclosure provides a laminated battery that can realize a laminated structure in which electrode composite material portions are not displaced, can simplify the manufacturing process, and has improved production yield, and provides a manufacturing method thereof. A positive electrode structure and a negative electrode structure in comb shapes are respectively produced with electrode composite material layers positioned in advance, and these are fitted to produce a laminate serving as a battery.

The present invention relates to an electrode assembly. The electrode comprises: a plurality of unit electrodes formed by connecting a plurality of electrodes made of an electrode mixture having a solid shape to each other; a separator interposed between the plurality of unit electrodes; and an electrode tab attached to the unit electrode, wherein the electrode tab comprises first and second electrode tabs, which are respectively attached to the unit electrodes and have different specific resistance.

The disclosure relates to the technical field of batteries, and provides a battery manufacturing method, a battery, a battery module, and a battery pack. The battery manufacturing method includes following steps. Providing an insulating mylar, laminating on the insulating mylar to form a laminated cell that includes a separator film different from the insulating mylar, and wrapping the laminated cell with the insulating mylar. By laminating on the insulating mylar to form the laminated cell and then wrapping the laminated cell with the insulating mylar, a process of moving the laminated cell to the insulating mylar is omitted.

The disclosure relates to the technical field of batteries, and provides a battery manufacturing method and a battery. The battery manufacturing method includes the following steps. Providing a first casing that includes one of an upper cover and a bottom plate of a battery casing, and laminating on the first casing to form a laminated cell.

The present disclosure provides a lithium-ion battery, the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the positive active material comprises a layered lithium-containing compound, the negative active material comprises graphite, the positive film and the negative film satisfy a relationship 0.3≤(OI.sub.c×PD.sub.c)/(OI.sub.a×PD.sub.a)≤20.0. The present disclosure can make the lithium-ion battery have smaller swelling and higher charging capability, and also make the lithium-ion battery have excellent cycle life and excellent safety performance during the long-term fast charging process.

An electrode assembly includes a first electrode plate, a second electrode plate, and a separator. The separator is positioned between the first electrode plate and the second electrode plate. A first electrode plate and a second electrode plate are stacked. The electrode assembly further includes a first tab positioned on the first electrode plate, and a second tab and a third tab that are positioned on the second electrode plate. Projections of the first tab, the second tab, and the third tab on the first electrode plate do not overlap. The electrode assembly is provided with a multi-tab structure to achieve purposes of enhancing a current-carrying capacity of the battery and reducing a temperature rise. This application further provides a battery containing the electrode assembly.

A method for producing a battery, includes: stacking a separator having an adhesive layer and an electrode plate in such a manner that the electrode plate is in contact with the adhesive layer; forming a multilayer electrode body by bonding a part of the electrode plate to the adhesive layer such that the electrode plate has a bonded region bonded with the adhesive layer and a non-bonded region not bonded with the adhesive layer; putting the multilayer electrode body in a case; and injecting an electrolytic solution into the case.

The present invention relates to an electrode assembly. The electrode comprises: a plurality of unit electrodes formed by connecting a plurality of electrodes made of an electrode mixture having a solid shape to each other; a separator interposed between the plurality of unit electrodes; and an electrode tab attached to the unit electrode, wherein the electrode tab comprises first and second electrode tabs, which are respectively attached to the unit electrodes and have different specific resistance.

The present invention provides an electrode assembly in which a negative electrode coated with a negative electrode active material on a surface of a negative electrode collector, a separator, and a positive electrode coated with a positive electrode active material on a surface of a positive electrode collector are repeatedly laminated, the electrode assembly comprising: monocells in which the positive electrode, the separator, the negative electrode, and the separator are laminated, wherein at least two or more monocells are laminated, wherein, in any one of the monocells, an expansion part extending lengthily to one side is formed on the separators, and the expansion part of the separator surrounds the monocells laminated to be disposed at the outermost layers to fix the laminated monocells.