The present invention relates to a three-dimensional structure electrode, a method for manufacturing same, and an electrochemical element including the electrode. The present invention is characterized by comprising: (a) an upper conductive layer and a lower conductive layer which have a structure constituting an assembly within which a conductive material and a porous nonwoven fabric including a plurality of polymeric fibers are three-dimensionally connected in an irregular and continuous manner, thereby forming a mutually connected porous structure; and (b) an active material layer forming the same assembly structure as the conductive layers and forming a three-dimensionally filled structure in which electrode active material particles are uniformly filled inside the mutually connected porous structure formed in the assembly structure, wherein the active material layer is formed between the upper conductive layer and the lower conductive layer.

Improvements in the structural components and physical characteristics of lithium battery articles are provided. Standard lithium ion batteries, for example, are prone to certain phenomena related to short circuiting and have experienced high temperature occurrences and ultimate firing as a result. Structural concerns with battery components have been found to contribute to such problems. Improvements provided herein include the utilization of thin metallized current collectors (aluminum and/or copper, as examples), high shrinkage rate materials, materials that become nonconductive upon exposure to high temperatures, and combinations thereof. Such improvements accord the ability to withstand certain imperfections (dendrites, unexpected electrical surges, etc.) within the target lithium battery through provision of ostensibly an internal fuse within the subject lithium batteries themselves that prevents undesirable high temperature results from short circuits. Battery articles and methods of use thereof including such improvements are also encompassed.

A lithium battery cell with an internal fuse component and including needed tabs which allow for conductance from the internal portion thereof externally to power a subject device is provided. Disclosed herein are tabs that exhibit sufficient safety levels in combination with the internal fuse characteristics noted above while simultaneously displaying pull strength to remain in place during utilization as well as complete coverage with the thin film metallized current collectors for such an electrical conductivity result. Such tabs are further provided with effective welds for the necessary contacts and at levels that exhibit surprising levels of amperage and temperature resistance to achieve the basic internal fuse result with the aforementioned sufficient conductance to an external device. With such a tab lead component and welded structure, a further improvement within the lithium battery art is provided the industry.

An examination method of the present invention is characterized by including a step of bringing conductor probes into contact with surfaces of an examination target to measure voltage or electric resistance at a plurality of points on the surfaces of the examination target, the examination target being a resin current collector, an electrode sheet having an active material layer laminated on the resin current collector, a separator-attached electrode sheet in which a separator is combined with the electrode sheet, or a unit cell including one set of a positive electrode resin current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode resin current collector, which are laminated in order, and a step of determining whether or not a point at which the voltage or the electric resistance is out of an allowable range is present in the examination target.

Disclosed are an electrode plate and an electrochemical apparatus. A first function surface of a current collector in the electrode plate includes a first active layer region and a first tab region, a second function surface of the current collector includes a second active layer region corresponding to the first active layer region and a second tab region corresponding to the first tab region, and an active layer is disposed in the first active layer region and/or the second active layer region. The first tab region is provided with N through holes penetrating to the second tab region, a tab passes through a through hole, and a first section of the tab is connected to the first tab region to form a first connection region and a second section of the tab is connected to the second tab region to form a second connection region, where N≥1.

Provided is a lithium-ion assembled battery in which two or more single cells are laminated and the DC resistance value between the single cells is low. The assembled battery has two or more single cells including a laminating unit in which a positive electrode current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a negative electrode current collector are laminated in order, in the assembled battery, one single cell and the other single cell are laminated such that the positive electrode current collector of the one single cell and the negative electrode current collector of the other single cell are in contact with each other, the positive electrode current collector is made up of a conductive resin layer containing a polyolefin resin (A1) and a conductive carbon filler (B1), the negative electrode current collector is made up of two or more kinds of conductive layers, and the conductive layer disposed on an outer side among the conductive layers in the negative electrode current collector contains the polyolefin resin (A1) and the conductive carbon filler (B1).

A sodium metal battery and an electrochemical apparatus, the battery has a positive electrode sheet and a negative electrode sheet, the negative electrode sheet being a negative electrode current collector, and a sodium layer deposited in situ on the negative electrode current collector having a thickness of ≥30 nm after the battery is charged and discharged for the first time. After the battery cell is charged and discharged for the first time, the amount of residual sodium metal is sufficient to uniformly form a sodium deposition layer with a certain thickness on the surface of the negative electrode current collector. The higher nucleation energy required for the deposition of sodium onto the surface of the current collector during subsequent charge-discharge cycles is avoided, the overall deposition overpotential is reduced, and the deposition uniformity of sodium metal and the reversibility of the charge-discharge process are ensured.

Disclosed are a high-orientation collector for a lithium-ion battery, a manufacturing method therefor and an application thereof. The collector is made of a resin material added with conductive particles. The conductive particles of the collector in an X-Y direction do not form a sufficient conductive network, but form a good conductive network in a Z direction. While a short circuit occurs, the collector is not easy to activate most of active materials in the X-Y direction so that thermal runaway is not easy to occur, but the collector may fully conduct electricity in the Z direction so that the battery may be normally charged and discharged, thereby improving battery safety.

A secondary battery includes a rectangular exterior body having an opening and containing a first electrode assembly and a second electrode assembly, a sealing plate sealing the opening, and a positive-electrode current collector. The sealing plate has an electrolytic solution introduction hole. The first electrode assembly includes a first insulating sheet on an outermost surface thereof adjacent to the second electrode assembly. The second electrode assembly includes a second insulating sheet on an outermost surface thereof adjacent to the first electrode assembly. A first tape is attached to both an outermost surface of a first positive-electrode tab group and the first insulating sheet. A second tape is attached to both an outermost surface of a second positive-electrode tab group and the second insulating sheet. At least one of the first tape and the second tape is located to face the electrolytic solution introduction hole.

Particular embodiments described herein provide for a privacy cover in an electronic device. The battery system can be configured to monitoring one or more condition of a battery using a battery electrolyte controller that is separate from the battery, adjusting one or more properties of an electrolyte in an electrolyte conduit, where the electrolyte conduit is coupled to an inlet and an outlet on the battery, and activating a pump to move the electrolyte with the adjusted one or more properties into the battery.