The present invention relates to a negative electrode for a lithium ion secondary battery, the negative electrode containing a negative electrode active material containing a first carbon and a second carbon, in which the first carbon is spherical graphite, the second carbon is massive graphite, and the sulfur concentration in the first carbon (Sx) and the sulfur concentration in the second carbon (Sy) are each independently 0 ppm or more and 300 ppm or less.

Provided is a method for manufacturing a laminated electrode body which is excellent in terms of productivity and production cost. The method for manufacturing a laminated electrode body disclosed herein includes the steps of: preparing a wound body having a flat portion and two curved portions by using a laminate formed of an elongated positive electrode, an elongated negative electrode, and an elongated separator that insulates the positive electrode and the negative electrode from each other; preparing an electrode laminate structure having two cut surfaces by cutting out and removing the two curved portions of the wound body; and removing active materials on the cut surfaces of the electrode laminate structure by spraying an inactive gas or electrically insulating particles onto the cut surfaces while applying, to the electrode laminate structure, a voltage of 25 V or more and less than a voltage causing a dielectric breakdown of the separator.

Disclosed is a stacked array of a plurality of thin film batteries electrically connected in a staggered configuration, where the side edges of the array preferably generally conform to an interior surface of an electronic device or component thereof in order to save space. In an embodiment, the stacked array comprises at least one battery having a single surface in contact with a plurality of batteries. In another embodiment, a shaped array of a plurality of thin film batteries electrically are connected together, whereby a plurality of batteries are arranged in a single layer on a non-rectangular substrate adjacent to one another generally in the shape of the surface of the substrate. Additionally, a thin film battery is described having at least one via through the substrate and at least one other via through an insulation layer to provide electronic connection to the battery cell.

One example includes a battery case sealed to retain electrolyte, an electrode disposed in the battery case, the electrode comprising a current collector formed of a framework defining open areas disposed along three axes (framework), the framework electrically conductive, with active material disposed in the open areas; a conductor electrically coupled to the electrode and sealingly extending through the battery case to a terminal disposed on an exterior of the battery case, a further electrode disposed in the battery case, a separator disposed between the electrode and the further electrode and a further terminal disposed on the exterior of the battery case and in electrical communication with the further electrode, with the terminal and the further terminal electrically isolated from one another.

A sealing body of a battery includes a positive electrode cap, a safety valve electrically connected to the positive electrode cap, a plurality of protrusions that are disposed annularly and intermittently on the outer peripheral side of a conductive contact part of the safety valve and that are each formed so as to be inclined toward the center of the sealing body, and an insulating member that covers at least top parts of the plurality of protrusions, side surfaces thereof on the center side, and a surface of the safety valve on the center side, that is fitted to the center side of the plurality of protrusions, whose vertical sectional shape is bent in a Z-shape. A terminal plate is fitted and fixed to the center side of the insulating member and is connected by welding to the conductive contact portion through a central opening of the insulating member.

A battery electrode with a pasting textile, fabric, or scrim made with an electrode grid (e.g., a stamped grid or expanded metal grid) coated in battery electrode and covered with pasting textile formed of a bonded, non-woven fiber web. The web is formed from one or more fibers with an average length greater than 20 m. In various embodiments, the web is formed from one or more spun, continuous fibers. The battery electrode may be made in a continuous process where multiple grids are formed in a single sheet, coated with electrode active material and the scrim before being cut into individual electrodes.

An electric storage battery and method of manufacture thereof characterized by a feedthrough pin which is internally directly physically and electrically connected to an inner end of a positive electrode substrate. A C-shaped mandrel extends around the pin and substrate end enabling the pin/mandrel to be used during the manufacturing process as an arbor to facilitate winding layers of a spiral jellyroll electrode assembly. The pin additionally extends from the battery case and in the final product constitutes one of the battery terminals with the battery case comprising the other terminal. Active material is removed from both sides of the outer end of the negative electrode in the jellyroll to allow room for adhesive tape to secure the jellyroll. The electrolyte is injected through the open end of the case after the endcap is welded to the negative electrode but before sealing the endcap to the case. The electrolyte is preferably injected through the C-shaped mandrel to facilitate and speed filling.

A method for producing a non-aqueous electrolyte secondary battery according to the present invention is characterized in that the method comprises the steps of: placing an electrode body into an outer casing, the electrode body having a folded-separator structure or a wound structure in which a positive electrode including a positive-electrode active material and a negative electrode including a negative-electrode active material are stacked with a separator interposed therebetween; placing a non-aqueous electrolyte free of a flame retardant into the outer casing; charging the electrode body by applying a voltage between the positive electrode and the negative electrode placed in the outer casing; placing a flame retardant into the outer casing; and sealing the outer casing, wherein the step of charging is a step of charging the electrode body with the state in which the surface of the positive-electrode active material and the surface of the negative-electrode active material are in contact with the non-aqueous electrolyte substantially free of the flame retardant.

There are provided a method of manufacturing a jelly roll-type electrode assembly and a method of manufacturing a secondary battery using the electrode assembly. The method of manufacturing the electrode assembly includes notching a cathode and an anode, elongated in one direction, in a constant size and shape to form a plurality of electrode units, laminating the cathode and the anode with a separator disposed therebetween to form a unit cell, and winding the unit cell by bending the connection units so that the electrode units of the cathode and the anode overlap each other. In the manufacturing of the jelly roll-type electrode assembly and the polymer secondary battery, whose production process can be easily simplified, a jelly roll-type electrode assembly and a polymer secondary battery, both of which exhibit excellent design flexibility, can be manufactured.

A polymer battery module packaging sheet includes, as essential components, a base layer (61), an aluminum layer (62), chemical conversion coatings (64a, 64b) coating the opposite surfaces of the aluminum layer (62), and an innermost layer (63). The chemical conversion coatings (64a, 64b) are formed by processing the opposite surfaces of the aluminum layer (62) by a phosphate treatment method. The base layer (61) and the innermost layer (63) are bonded to the chemical conversion coatings (64a, 64b) of the aluminum layer (62) with adhesive layers (65a, 65b), respectively.