A system for automatically controlling an electrode drying includes: an oven which provides a space where an electrode sheet is moved and dried, includes a dryer which applies hot air and/or radiant heat to the electrode sheet, and is divided into a plurality of drying sections; a measuring unit which collects information on a dried amount of the electrode sheet and transmits the collected information to a controller; and the controller which determines a dried level of the electrode sheet based on the information on the dried amount received from the measuring unit, and control a drying intensity of the oven according to the determined dried level. Herein, the controller independently controls the plurality of drying sections.

A support apparatus for the production of electric energy storage devices comprising a support element, which is linearly movable along a feeding plane, an actuator system, which is configured to drive the support element in an intermittent manner, a first roller, which is configured to be caused to rotate at a variable speed, and a second roller, which is opposite the first roller. A further actuator system is configured to control the speed of the first roller compensating for the intermittent movement of the support element.

In a method of manufacturing an electrode assembly for a rectangular battery, in which positive electrodes and negative electrodes are alternately laminated so that a separator exists between the respective positive and negative electrodes, the manufacturing method includes the steps of: arranging a plurality of guide members in zigzag form in a perpendicular direction; inserting a continuous member of the separator between one and another one rows of the guide members; folding, into zigzag form, the continuous member by intersecting the rows of the guide members in a horizontal direction; inserting alternately the positive electrodes and the negative electrodes in respective valley grooves of the zigzag-folded continuous member; withdrawing the guide members from the respective valley grooves of the continuous member; and pressing, thereafter, the continuous member in the zigzag direction so as to make flat the continuous member.

An electrode assembly and a secondary battery having an electrode tab are disclosed. In one aspect, the electrode assembly includes first and second electrodes which are wound with a separator placed therebetween. The first electrode includes a first coated portion, and a plurality of first electrode tabs T1-Tn not coated with an active material and protruding outwardly from the first coated portion, wherein n is greater than 2. The first electrode, when spread in a plane form, includes first to nth portions on which the first electrode tabs T1-Tn are respectively formed, wherein the first and nth portions respectively define the innermost and outermost portions thereof. The distance between the first electrode tab Tn placed at the outermost portion and the first electrode Tn−1 placed at the second outermost portion is greater than any of the distances between two adjacent ones of the other first electrode tabs T1-Tn−1.

The present disclosure provides a wound-type cell and a winding mandrel. The wound-type cell comprises: a first electrode plate having a blank first current collector which is positioned at a first winding start end and is not coated with the first active material layer; a second electrode plate having a blank second current collector which is positioned at a second winding start end and is not coated with the second active material layer, and the blank second current collector is positioned at an inner side of the blank first current collector; a separator; a first electrode tab; and a second electrode tab. A first end of the blank first current collector is beyond a second end of the blank second current collector in a length direction, and a position of the first electrode tab is beyond the second end of the blank second current collector in the length direction.

An electrochemical cell includes a cell housing and an electrode assembly disposed in the cell housing. The electrode assembly includes an electrode pair that is arranged to form a winding having a polygonal spiral wound shape in which a radius of the corner portions of each turn of the winding is constant, regardless of the number of turns. In addition, a length of the linear portions of one turn of the winding is different than a length of the linear portions of another turn of the winding. Since each turn of the winding includes the corner portions having a desired radius, the volumetric efficiency of the electrode assembly including the winding within a cell housing is improved relative to some cells that use conventional windings. An apparatus and method of forming a polygonal spiral wound winding are disclosed.

Methods, systems, and compositions for the liquid-phase deposition (LPD) of thin films. The thin films can be coated onto the surface of porous components of electrochemical devices, such as battery electrodes. Embodiments of the present disclosure achieve a faster, safer, and more cost-effective means for forming uniform, conformal layers on non-planar microstructures than known methods. In one aspect, the methods and systems involve exposing the component to be coated to different liquid reagents in sequential processing steps, with optional intervening rinsing and drying steps. Processing may occur in a single reaction chamber or multiple reaction chambers.

A method for forming electrodes assemblies, used for producing secondary lithium batteries, comprises the steps of feeding two separator strips with continuous feed motions, inserting between the two strips a succession of anodes at reciprocal distances that progressively increase, arranging a succession of cathodes, either all on an outer side of a strip, or alternating a cathode on an outer side of a strip and a cathode on an outer side of the other strip, such that on each single anode a single cathode is superimposed with the interposition of one of the two strips; strips, cathodes and anodes are then laminated together, the laminated product is wound in a single winding direction and the wound product is separated from the rest of the laminated product to enable a subsequent electrodes assembly to be formed.

A device for producing a negative electrode, which includes: a pre-lithiation bath containing a pre-lithiation solution, which is sequentially divided into an impregnation section, a pre-lithiation section, and an aging section; a negative electrode roll present outside the pre-lithiation solution, wherein the negative electrode roll is configured to allow a negative electrode structure to be wound and unwound; and one or more pre-lithiation rolls which are present inside the pre-lithiation solution, wherein the one or more pre-lithiation rolls allow the negative electrode structure unwound from the negative electrode roll to move in the pre-lithiation bath, wherein the pre-lithiation roll includes an inner ring, an outer ring which is formed on the inner ring and is rotatable, and a rolling element present between the inner ring and the outer ring, and the outer ring in the pre-lithiation roll comprises a non-conductor.

A pressurized electrochemical battery and process for manufacturing the same, which comprises several connectors to at least one electrochemical cell with several electrical energy collectors that are connected to the connectors, with the electrochemical cell comprising several electrode sheets and several solid electrolyte sheets inserted between the electrode sheets, and at least one deformable chamber arranged in contact with the electrochemical cell, with the deformable chamber supplied with a fluid that deforms the chamber to apply pressure to the electrochemical cell.