A rechargeable battery according to an exemplary embodiment of the present invention may include an electrode assembly which can charge and discharge a current, a lead tab which is electrically connected to the electrode assembly, and a pouch case including an accommodation unit in which the electrode assembly is accommodated, and of which at least a portion of an edge side is formed to be curved, and a bonding unit which is formed to be extended from the edge side of the accommodation unit and seals the accommodation unit, wherein the bonding unit may include an upper bonding unit from which the lead tab is drawn out and a side bonding unit which is bent in a thickness direction of the accommodation unit and enables a support space to be formed between the side bonding unit and the accommodation unit.

The present invention relates to a battery cell. The battery cell comprises: an electrode assembly provided with an electrode tab; a case which accommodates the electrode assembly and of which at least a portion of an edge is sealed to provide a sealing surface; an electrode lead coupled to the electrode tab and led out of the case; a lead film disposed on each of top and bottom surfaces of the lead electrode disposed on the sealing surface of the case and coupled together with the sealing surface; and a main gas discharge tube disposed in the case and having one end buried in the lead film.

A drum arranged for reeling and dividing an elongate web of sheet material to produce discrete stacks of web portions is provided. The drum includes a series of faces forming a web-receiving loop that extends around a central axis of the drum, each face of the drum being defined by a respective drum segment that is configured to support a respective stack of web portions of a web reeled onto the web-receiving loop. The drum segments are movable to enable the web-receiving loop to expand to increase tension in a web reeled onto the web-receiving loop to divide the elongate web into discrete stacks.

To provide a secondary battery in which a side reaction does not easily occur at an interface between a positive electrode active material and a solid electrolyte, an interface between the positive electrode active material and a positive electrode current collector, or the like even when charge and discharge are repeated. In one embodiment of the present invention, a buffer layer or a protective layer is provided on a current collector surface or between a current collector layer and an active material layer to prevent deterioration such as oxidation of the current collector. As the buffer layer or the protective layer, it is possible to use a titanium compound such as titanium oxide, titanium oxide in which nitrogen is substituted for part of oxygen, titanium nitride, titanium nitride in which oxygen is substituted for part of nitrogen, or titanium oxynitride (TiO.sub.xN.sub.y, where 0<x<2 and 0<y<1). Titanium nitride is particularly preferable because it has high conductivity and has a high capability of inhibiting oxidation.

An apparatus for manufacturing an electrode assembly according to the present invention includes a conveyor configured to allow an electrode to travel; and a cutter configured to cut the traveling electrode to a predetermined size, wherein the cutter comprises: an upper cutting blade disposed above the electrode; an upper eccentric driver configured to eccentrically drive the upper cutting blade; a lower cutting blade disposed below the electrode in a direction corresponding to the upper cutting blade; and a lower eccentric driver configured to eccentrically drive the lower cutting blade.

A system for replacing a reel of material for the production of electrical energy storage devices and comprising a self-driving vehicle for transporting a reel from a storage or receiving station to a change station is described; at least one support spindle carried by the vehicle and configured to support the reel and to transfer it, at the change station, to a feeding unit of an automatic machine for the production of the storage devices; and a gripping member carried by the vehicle and comprising at least one gripper configured to receive and grip an initial flap of the reel supported by the support spindle and to keep such initial flap tensioned along an unwinding path of the same.

The present invention relates to a flag forming device after laser notching of a secondary battery for an electric vehicle, and particularly, to a flag forming device after laser notching of a secondary battery for an electric vehicle configured by stacking electrode rolls within a circular box, which makes a flag shape by notching an uncoated portion having no coating of a negative electrode and a positive electrode with a laser, and makes the uncoated flag made by laser notching pass through a flag forming unit before winding to enable an uncoated tap to be folded inward. The present invention includes a flag forming device after laser notching of a secondary battery for an electric vehicle of the present invention including a tilt EPC unit 1 which moves a pole plate while maintaining a material uniformly and constantly at a setting value of an EPC sensor when the pole plate is moved, the EPC sensor 2 which numerically indicates the degree of distortion when the pole plate is moved through the tilt EPC unit 1, a flag forming unit 3 which molds a flag of the pole plate moved through the EPC sensor 2, an encoder roller 4 which measures a movement distance of the pole plate passing through the flag forming unit 3, a winding unit 5 which winds an electrode that has passed through the flag forming unit 3, and an air nozzle 6 which blows air before an uncoated flag is wound in the winding unit 5 to enable an uncoated tab to be folded inward.

The invention relates to a button lithium ion battery, a preparation method thereof, and a method of producing a lithium ion cell composite flat sheet, wherein the button lithium ion battery comprises a battery housing, a cell accommodated in the battery housing and an electrolyte filled in the battery housing; the cell is formed by winding a composite flat sheet in which a first separator, a positive piece, a second separator and a negative piece are sequentially stacked and hot-laminated to form an integrated structure. The cell of the button lithium ion battery is formed by winding a composite flat sheet, so that winding efficiency can be improved, and misalignment can be avoided; moreover, chances of hand contact can be reduced, the influence of dust and water vapor can be avoided, and the quality of the lithium battery can be improved to the maximum extent.

A battery is provided in which an electrode tab group is hardly damaged. In the herein disclosed battery, an electrode body includes an electrode body main body part, a positive electrode tab group protruding from a first end part, and a negative electrode tab group protruding from a second end part. The positive electrode tab group and the negative electrode tab group are folded and bent to make tip ends of electrode tabs respectively configuring these tab groups be arranged along a second side wall of the battery case. A portion of the folded and bent electrode tab is joined to the electrical collector body of the same pole. The battery includes a spacer between the electrode body main body part and the second side wall, and the spacer is to regulate movement of the electrode body.

A battery module and a method of assembling a battery module are provided. The method includes selectively applying a light-cure adhesive to recesses in a first side of a carrier layer and inserting battery cells into respective recesses. The method further includes exposing the first side of the carrier layer to light to at least partially cure the light-cure adhesive with the carrier layer in a first orientation, moving the carrier layer into a second orientation, and exposing a second opposite side of the carrier layer to light to fully cure the light-cure adhesive. The recesses may include a sidewall having crush points spaced apart along the sidewall and a bottom portion having an opening between a pair of crush points, where adhesive is not disposed between the pair of crush points.