Abstract: The present invention relates to a secondary battery in which an electrode tab is improved in mechanical strength and a method for manufacturing the same. Also, the secondary battery according to the present invention includes: an electrode provided with a coating portion coated with an active material on an electrode collector and a non-coating portion on which the active material is not applied to the electrode collector in a longitudinal direction of the electrode collector and a notching tab part extending from the coating portion in a width direction of the electrode collector without coating with the active material and overlapping each other to form two or more layers when the electrode is wound.

Abstract: A battery including a coiled electrode assembly with positive and negative electrodes coiled with a separator interposed therebetween, where the negative electrode includes a negative electrode current collector, a first negative electrode mixture layer formed on a first surface of the negative electrode current collector, the first surface facing an outside of the electrode assembly, and a second negative electrode mixture layer formed on a second surface of the negative electrode current collector, the second surface facing an inside of the electrode assembly. The first negative electrode mixture layer contains cellulose and rubber binders. A content of the cellulose binder is larger near a surface of the mixture layer than near the negative electrode current collector and a content of the rubber binder is larger near the negative electrode current collector than near the surface of the mixture layer in the thickness direction of the first negative electrode mixture layer.

Abstract: A battery includes a plurality of energy storage units, a flexible linkage arranged to physically and electrically connect each adjacent pair of energy storage units, and an encapsulation arranged to encapsulate the energy storage units and the linkages. The energy storage units are movable with respect to each other via the flexible linkage within each adjacent pair of energy storage units in the encapsulation.

Abstract: Provided are: a solid-state battery in which an initial load is applied to a battery cell; and a solid-state battery module comprised of the battery. This solid-state battery includes a pressing portion provided on a solid-state battery case so that a spring force is utilized to apply the initial load to the solid-state battery. Specifically, the solid-state battery includes a solid-state battery cell, and a battery case for accommodating the solid-state battery cell, in which the solid-state battery cell is a stack including a positive electrode, a negative electrode, and a solid electrolyte present between the positive electrode and the negative electrode, and in which a face constituting the battery case and extending substantially perpendicular to the stacking direction of the stack has a pressing portion.

Abstract: A solid-state battery having a battery body that includes a plurality of adjacent elements. A first external electrode is electrically connected to a first positive electrode. A second external electrode is electrically connected to a first negative electrode. A third external electrode is electrically connected to a second positive electrode. A fourth external electrode is electrically connected to a second negative electrode. A first element and a second element of the plurality of adjacent elements are connected in series by integrating the first external electrode and the fourth external electrode or by integrating the second external electrode and the third external electrode.

Abstract: Positive electrode-forming compositions including a) at least one positive electrode active material (AM), b) at least one binder (B) comprising at least one vinylidene fluoride copolymer [polymer (A)] that includes repeating units derived from vinylidene fluoride (VDF), recurring units derived from a fluoroalkylvinyl ether (FVE) monomer and recurring units derived from at least one hydrophilic (meth)acrylic monomer (MA) and c) at least one solvent, a process for their manufacture and their use thereof for manufacturing electrodes fix high-capacity nickel-rich lithium ion batteries.

Abstract: A method for producing a battery module is provided. The method for producing a battery module includes: stacking a plurality of battery cells; disposing a plurality of bus bars adjacent to electrode leads respectively provided at the plurality of battery cells; by a welding jig, pressing the electrode leads so that the electrode leads come into contact with the bus bars, respectively; and welding the electrode leads and the bus bars through an opening formed in the welding jig.

Abstract: A battery configured to support a relatively high rate of energy discharge relative to its capacity for energy intensive therapy delivery. The battery includes a feedthrough insulator cap disposed within the interior of the battery on at least a portion of a ferrule, at least a portion of an insulator, and at least a portion of a pin, which define a feedthrough extending through an enclosure of the battery; a first electrode disposed within the enclosure and electrically coupled to the pin; a second electrode disposed within the enclosure and separated a distance from the first electrode; and an electrolyte disposed between the first electrode and the second electrode. During operation of the battery, the feedthrough insulator cap reduces dendrite formation on at least a portion of the ferrule, the pin, or both.

Abstract: To improve the flexibility of a power storage device, or provide a high-capacity power storage device. The power storage device includes a positive electrode, a negative electrode, an exterior body, and an electrolyte. The outer periphery of each of the positive electrode active material layer and the negative electrode active material layer is a closed curve. The exterior body includes a film and a thermocompression-bonded region. The inner periphery of the thermocompression-bonded region is a closed curve. The electrolyte, the positive electrode active material layer, and the negative electrode active material layer are in a region surrounded by the thermocompression-bonded region.

Abstract: A wearable device needs to have a design corresponding to complicated surfaces of human bodies. Thus, an electronic device that can fit the characteristics of each individual human body after being purchased and can be worn naturally and comfortably is provided. The electronic device includes a secondary battery which can be transformed. By using a secondary battery which can be transformed, for example, a secondary battery can be efficiently placed in a narrow and elongated space in the electronic device, and the elongated secondary battery can be bent together with the electronic device. Furthermore, the weight balance of the electronic device can be easily adjusted.

Abstract: A component for an electrochemical device, the component including: a metallic substrate; and a plurality of particles bonded to a surface of the substrate by a metallurgical bond, wherein the particles include a metal, carbon, or a combination thereof, wherein the metallurgical bond is between the particles and the substrate, wherein a total projected area of the metallurgical bond is less than 90% of a total projected area of the substrate, and wherein the metallurgical bond has a composition which is a combination of a composition of the metallic substrate and a composition of the particle, a reaction product of the metallic substrate and the particle, or a combination thereof.

Abstract: Provided is a technique for suppressing the formation of black regions in a wound electrode body. The production method disclosed herein is a method for producing a non-aqueous electrolyte secondary battery that includes a wound electrode body, a non-aqueous electrolyte, and a battery case. This production method includes the following steps: an assembling step S1 of placing the wound electrode body and the non-aqueous electrolyte in the battery case to construct a secondary battery assembly; a first step S2 of performing initial charging on the secondary battery assembly; and a second step S3 of setting the temperature of the wound electrode body to 50° C. or lower and keeping this state for at least 72 hours after the first step.

Abstract: Disclosed are a method and device for welding and converging battery cell tabs, which is used for welding and converging battery core end faces. The method comprises: laminating to form a plate set composed of a positive plate, a separator and a negative plate by laminating, the positive plate comprising a positive tab, and the negative plate comprising a negative tab; during laminating, bending the positive tab to form a positive tab bend, and bending the negative tab to form a negative tab bend; and welding the positive tab bend of each positive plate in the plate set, and/or welding the negative tab bend of each negative plate in the plate set. Based on the method and device, a reserved length of the tab is reduced, and a material loss of the tab material is greatly reduced. Station circulation is reduced and production efficiency and a product yield are improved.

Abstract: The present disclosure provides a button cell and an electronic device. In the button cell, a conductive member covers an opening of a top cover, and the top cover is connected to the conductive member. A cell is placed in an accommodating cavity of a bottom shell. A first tab is welded to an inner bottom wall of the bottom shell, and then the top cover having the conductive member is connected to the bottom shell in a sealed manner, with a second tab on the cell being electrically connected to the conductive member. Finally, an electrolyte solution is injected into the accommodating cavity. After the electrolyte solution is injected, a sealing member covers the liquid injection port, and the sealing member is connected to the liquid injection port in a sealed manner.

Abstract: A pouch-type secondary battery includes an electrode assembly; and a pouch member comprising an accommodating portion configured to accommodate the electrode assembly therein, a sealing portion formed at an edge of the accommodating portion, and an indent portion formed of a cutting edge cut at a plurality of angles and a rounded edge cut to connect the cutting edges adjacent to each other in a portion of the sealing portion corresponding to a vertex of the accommodating portion.

Abstract: A purpose of the present invention is to provide a lithium ion secondary battery having more improved life characteristics while suppressing gelation of an electrode mixture slurry in a manufacturing process. The lithium ion secondary battery according to the present invention comprises a positive electrode having a positive electrode mixture layer comprising a layered lithium-nickel composite oxide in which a proportion of nickel in metals other than lithium is 80 mol % or more; LiOH; Li2CO3; and a chlorine-containing polyvinylidene fluoride-based polymer, wherein a content of LiOH in the positive electrode mixture layer and a content of Li2CO3 in the positive electrode mixture layer are each 0.1 weight % or more and 2.1 weight % or less, a total content of LiOH and Li2CO3 in the positive electrode mixture layer is 0.2 weight % or more and 4.2 weight % or less, and a content of chlorine in the positive electrode mixture layer is 30 ?g/g or more and 120 ?g/g or less.

Abstract: A first angle (?1) formed between a second straight line (L2) and a third straight line (L3) is more than 55°. A first length (D1) represents a straight line distance between a first point (A) and a second point (B), and a second length (D2) represents a length of a first electrode core body between the first point (A) and the second point (B). On this occasion, the second length (D2) is 1 time or more and 1.1 times or less as large as the first length (D1).

Abstract: A pouch packaged lithium-ion battery with a tooth-shaped sealing edge, including a main body, which includes an aluminum-plastic film arranged with a jelly roll disposed therein. The jelly roll includes a cathode, an anode and a film separating the two. The cathode, the film and the anode are winded and overlaid. A cathode tab and an anode tab are respectively arranged on both sides of the jelly roll. A middle part of the aluminum-plastic film extends toward an outside of the lithium-ion battery to form a sealing edge. The cathode tab and the anode tab extend horizontally and penetrate the sealing edge. A joint between the cathode/anode and the sealing edge is covered with a tab sealant. The sealing edge, the cathode tab and the anode tab are bent to attach to a surface of the main body. The surface of the sealing edge is arranged with tooth-shaped grooves.

Abstract: The present disclosure provides an electrode assembly and a secondary battery. The electrode assembly includes a first electrode plate, a second electrode plate and a separator. The first electrode plate, the second electrode plate and the separator are wound to a flat structure, and the flat structure comprises a main region and corner regions, the corner regions are provided at two ends of the main region along a width direction of the main region. The first electrode plate and the second electrode plate each are wound to turns. A gap is provided between two adjacent turns of the first electrode plate, the gap includes a first gap and a second gap. The first gap corresponds to the corner region in position, the second gap corresponds to the main region in position, and a dimension of the first gap is larger than a dimension of the second gap.

Abstract: The present application relates to the field of battery, in particular to a positive electrode piece, an electrochemical device and an apparatus. The positive electrode piece of the present application includes a current collector and an electrode active material layer arranged on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer arranged on at least one surface of the support layer. The thickness D2 of one side of the conductive layer D2 satisfies 30 nm?D2?3 ?m, the material of the conductive layer is aluminum or aluminum alloy, and the density of the conductive layer is 2.5 g/cm3 to 2.8 g/cm3, and a primer layer containing a conductive material and a binder is also arranged between the current collector and the electrode active material layer.

Abstract: A method for producing a button cell includes providing a metal cell cup, providing a metal cell top, and providing a first electrode and a second electrode. The first electrode includes a first current collector partially coated with a first active electrode material and having an active material-free region. The second electrode includes a second current collector partially coated with a second active electrode material and having an active material-free region. The method further includes attaching a first metal foil conductor to the active material-free region of the first current collector, attaching a second metal foil conductor to the active material-free region of the second current collector, and forming a cylindrical electrode winding by winding, in a spiral, an electrode assembly. The first and second metal foil conductors extend out of the cylindrical electrode winding from first and second end faces of the cylindrical electrode winding.

Abstract: In the present invention, not only a movement path of a current generated from a first electrode assembly, but also a movement path of a current generated from a second electrode assembly are provided by a cathode conductive member, and not only a movement path of the current generated from the second electrode assembly, but also a movement path of the current generated from the first electrode assembly are provided by an anode conductive member, such that cross sectional areas of the correct movement paths are increased. Therefore, a resistance of the long width secondary battery may be reduced.

Abstract: A complex electrode assembly includes a first sheet-type wiring which extends in a lengthwise direction of the first sheet-type wiring and comprises a sheet region of which a width that is perpendicular to the lengthwise direction is greater than a thickness that is perpendicular to the lengthwise direction and a width direction of the first sheet-type wiring, and electrode assemblies which are arranged separate from each other in the lengthwise direction of the first sheet-type wiring and are electrically connected to the first sheet-type wiring. The first sheet-type wiring may be disposed to face an outer surface of each of the electrode assemblies.

Abstract: A secondary battery according to an embodiment includes: an electrode body which contains a positive electrode, a negative electrode, and at least one separator interposed between the positive electrode and the negative electrode; a case main body which receives the electrode body; a sealing body which seals an opening portion of the case main body; and a sealing body-side insulating member provided between the sealing body and one end portion of the electrode body and a case main body-side insulating member; the one end portion and the other end portion of the electrode body each form a protruding section; and the sealing body-side insulating member includes a base material and an adhesive layer which is disposed on the base material and which contains a cured object of a curable resin, and the protruding section of the one end portion of the electrode body is adhered to the adhesive layer.

Abstract: The present disclosure relates to a secondary battery, which can improve the sealing efficiency of a can (or case). The secondary battery includes an electrode assembly; a case configured to accommodate the electrode assembly, the case including a bottom portion, long side portions and short side portions, at least one of which includes a welding portion that is configured to be bent and welded, and a cap plate coupled to the case, wherein a portion of the welding portion is overlap-welded.

Abstract: This application relates to a battery comprising a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active material coated on at least one surface of the positive electrode current collector, and wherein an underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material and a first conductive material; and wherein an upper positive active material layer in contact with the underlying positive active material layer and away from the positive electrode current collector comprises a second positive active material, a second polymer material and a second conductive material, and the first polymer material comprises fluorinated polyolefin and/or chlorinated polyolefin polymer material. The battery has good safety and improved electrical properties.

Abstract: The present disclosure aims to provide a nonaqueous electrolyte secondary battery in which electrode plate deformation in association with charge/discharge cycles is suppressed. A nonaqueous electrolyte secondary battery which is one example of an embodiment of the present disclosure includes a winding type electrode body (14). The electrode body (14) is provided with a tape (50) adhered to an exposed portion (42) which is provided at an outermost circumferential surface and at which a negative electrode collector is exposed. The tape (50) is adhered to the exposed portion (42) so as not to be overlapped with at least one of a winding-finish side end (31e) of positive electrode mixture layers and a winding-finish side end (41e) of negative electrode mixture layers in a radius direction of the electrode body (14).

Abstract: A method for manufacturing a cylindrical battery having multiple tabs is provided in which the cylindrical battery includes an electrode assembly, a cylindrical pouch case, an electrode tab protruding to an upper end of the electrode assembly, and an electrode lead welded and electrically connected to the electrode tab, with the electrode tab being plural. The method includes disposing the plurality of electrode tabs on the electrode assembly; winding the electrode assembly into a cylindrical shape; connecting the electrode lead to the plurality of electrode tabs disposed on the upper end of the electrode assembly; inserting the electrode assembly into the cylindrical pouch case to produce a battery cell; connecting, to the cylindrical pouch case, a gas collecting part for collecting gas generated due to charging and discharging of the electrode; and forming a guide part for preventing deformation of the battery cell in the cylindrical pouch case.

Abstract: In the case where a film, which has lower strength than a metal can, is used as an exterior body of a secondary battery, a current collector provided in a region surrounded by the exterior body, an active material layer provided on a surface of the current collector, or the like might be damaged when force is externally applied to the secondary battery. A secondary battery which is resistant to external force is obtained. An opening is provided in a central portion of the secondary battery; and a terminal is formed in the opening. An outer edge of the secondary battery is fixed by thermocompression bonding. In addition, the central portion of the secondary battery is fixed by thermocompression bonding, so that the amount of bending is limited even when the outer edge portion of the secondary battery is bent.

Abstract: The present disclosure relates to a secondary battery, which can improve the sealing efficiency of a can (or case). The secondary battery includes an electrode assembly; a case configured to accommodate the electrode assembly, the case including a bottom portion, long side portions and short side portions, at least one of which includes a welding portion that is configured to be bent and welded, and a cap plate coupled to the case, wherein a portion of the welding portion is overlap-welded.

Abstract: A positive electrode current collector, a positive electrode piece, an electrochemical device and an apparatus, where the positive electrode current collector includes a support layer and a conductive layer provided on the support layer, where a material of the conductive layer is aluminum or aluminum alloy, and a thickness D1 of the conductive layer is 300 nm?D1?2 ?m; an elongation at break B of the support layer is 10,000%?B?12%, and a volume resistivity of the support layer is greater than or equal to 1.0×10?5 ?·m; when a tensile strain of the positive electrode current collector is 2%, a square resistance growth rate T1 of the conductive layer is T1?10%. The positive electrode current collector provided in the present application can simultaneously take into account both high safety performance and electrical performance.

Abstract: The non-aqueous electrolyte secondary cell according to the present invention comprises: an electrode body constituted by a positive electrode including a positive electrode active material comprising a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector onto which metallic lithium is deposited during charging, and a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. The molar ratio of the total lithium content of the positive electrode and the negative electrode to the transition metal content of the positive electrode is 1.1 or less. During discharging, the positive electrode capacitance ?(mAh) of the positive electrode and the volume X (mm3) of a hollow constituted by a space formed in the center of the electrode body 14 satisfy the relationship 0.5?X/??4.0.

Abstract: A lithium ion secondary battery includes: an anode including an anode current collector and an anode coating layer coating a region of the anode current collector; a cathode including a cathode current collector, a cathode coating layer coating a region of the cathode current collector, and an inactive coating layer disposed on a surface of a region of the cathode current collector on which the cathode coating layer is not disposed, the inactive coating layer extending from one or more of both end portions of the cathode coating layer toward an end portion of the anode; and a separation membrane arranged between the cathode and the anode.

Abstract: The present application discloses a battery and a related apparatus, production method and production device therefor. The battery includes: a battery cell, the battery cell including a pressure relief mechanism configured to be capable of being actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; an attachment component adapted to be attached to the battery cell by an adhesive; and an isolation component configured to be capable of preventing the adhesive from being applied between the attachment component and the pressure relief mechanism. By providing the isolation component, it is possible to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism in an effective manner in a process of battery production. Meanwhile, application efficiency and accuracy of the adhesive could be improved, thereby improving production efficiency of the battery.

Abstract: Rechargeable energy storage battery system comprises a cell, which comprises a) an electrolyte comprising a material comprising carbon, wherein the electrolyte is in a solid state; b) an anode electrode comprising a first material comprising graphene; c) a cathode electrode comprising a second material comprising graphene; d) a separator between the anode electrode and the cathode electrode. Anode comprising graphene, cathode comprising graphene oxide, the electrolyte comprises graphene oxide, organic, polymer, inorganic material.

Abstract: A battery, a battery pack, and a vehicle are disclosed. The battery includes a housing having a sealed chamber, a core packaged in the sealed chamber, and a first terminal and a second terminal respectively mounted to the housing, where the first terminal is electrically connected to the housing, and the second terminal is insulated from the housing. The battery further includes a first tab and a second tab respectively led out from the core, the first tab being electrically connected to the housing, the first tab being electrically connected to the first terminal through the housing, and the second tab being electrically connected to the second terminal.

Abstract: Localized superconcentrated electrolytes (LSEs) and electrochemical devices including the LSEs are disclosed. The LSE includes an active salt, a solvent in which the active salt is soluble, and a diluent in which the active salt is insoluble or poorly soluble, wherein the diluent includes a fluorinated orthoformate.

Abstract: One of the objects of the present invention is to suppress mixing of a first layer and a second layer while forming the second layer before drying the first layer when manufacturing the electrode for the secondary battery in which the first layer and the second layer are laminated on the current collector. A method for manufacturing an electrode used as a positive electrode and a negative electrode of a secondary battery according to the present invention comprises applying a first layer slurry to a surface of a current collector, applying a second layer slurry on the first layer slurry before the first layer slurry is dried, and drying the first layer slurry and the second layer slurry after applying the first layer slurry and the second layer slurry to obtain a laminated structure in which a first layer and a second layer are laminated in this order on the current collector.

Abstract: A cylindrical secondary battery configured to have a structure to which an adhesion unit, including an adhesive material, a conductive material, and a gas-generating material, is provided. The adhesion unit is configured to couple a cap assembly, which functions as a positive electrode terminal of the cylindrical secondary battery, and a positive electrode tab of a jelly-roll type electrode assembly to each other.

Abstract: A battery cell having an electrode assembly having a hollow structure with a hexagonal prism-shaped hole at a center, of which an exterior of the electrode assembly is in a shape of a hexagonal prism, and a cell case in which the electrode assembly is received, of which an exterior of the cell case is in a shape of a hexagonal prism is provided.

Abstract: A jig for pressing a gas analysis monocell according to the present invention comprises: a first plate and a second plate which face each other with a monocell therebetween; a first auxiliary pad positioned between the first plate and the monocell; and a second auxiliary pad positioned between the second plate and the monocell, wherein the first plate and the second plate are formed of a thermosetting resin. When analyzing a gas generated from the monocell during a primary charge, the jig for pressing the monocell according to the present invention presses the thin monocell to prevent a gap from forming between electrodes due to the primary charge, and thus has an effect of deriving more reliable analysis results.

Abstract: The present disclosure provides a non-aqueous electrolyte secondary battery having a stable open-circuit voltage. An electrode for a non-aqueous electrolyte secondary battery according to one embodiment includes a belt-like current collector, a mixture layer formed on each surface of the current collector, and a lead bonded to an exposed portion of the current collector where the surfaces of the current collector are exposed, the lead extending from one end of the current collector, the one end and another end constituting both ends of the current collector in the width direction. In an electrode for a non-aqueous electrolyte secondary battery according to one embodiment, a mixture layer is formed on at least one surface of a current collector in the width direction of the current collector and adjacent to an exposed portion on one end side.

Abstract: The present disclosure provides a secondary battery, which comprises an electrode assembly, a pouch, an electrode lead and an insulating tape. The electrode assembly is received in the pouch, the electrode lead is connected with the electrode assembly and extends to the outside of the pouch in a length direction. The electrode assembly comprises electrode plates and a separator, the separator separates the electrode plates. An outer surface of the electrode assembly comprises a first surface and a second surface, an area of the second surface is smaller than an area of the first surface. The first surface is provided as two in number, and the two first surfaces face each other in a thickness direction; the second surface is provided as two in number, and the two second surfaces face each other in a width direction, each second surface connects two first surfaces.

Abstract: Provided is a battery module in which a heat radiation effect and manufacturing efficiency are effectively improved. The battery module includes a cell assembly including at least one unit body, each unit body including at least two secondary batteries stacked in a first direction. Each unit body includes an integrated unit sheet folded to surround a top portion, a left surface, a right surface, and a bottom portion of the at least two secondary batteries, opposite ends of a top portion of the integrated unit sheet being positioned to contact each other on any one of the top portion, the left surface, the right surface, and the bottom portion of the at least two secondary batteries, and an electric insulating material coated on at least a part of a perimeter portion of the integrated unit sheet.

Abstract: The application relates to a battery pack case and a battery pack. The battery pack case includes: a bottom plate and a side plate connected with the bottom plate, the bottom plate and the side plate surround to form an accommodating portion configured to accommodate a unit cell; the bottom plate is provided with a plurality of first grooves and a plurality of second grooves opening toward the accommodating portion, the plurality of first grooves are spaced apart from each other, the plurality of second grooves are spaced apart from each other, and the first grooves and the second grooves are arranged to cross each other. The bottom plate of the battery pack itself has good rigidity, is not prone to warp deformation, and can prevent the overflow of structural glue from contaminating the wiring harness or electrical components.

Abstract: A battery cell in the form of a round cell, having: at least one electrode element having an inner side and an outer side and at least one temperature control element, wherein the inner side of the at least one electrode element is spaced apart, at least in sections, from the outer side of the at least one electrode element by means of the temperature control element.

Abstract: Provided is a secondary battery and a comb-type electrode. A negative electrode layer sheet formed by stacking a negative electrode active material layer on two surfaces of a negative electrode current collector and a positive electrode layer sheet formed by stacking a positive electrode active material layer on two surfaces of a positive electrode current collector are alternately stacked, and an electrolyte body is interposed between the negative electrode layer sheet and the positive electrode layer sheet adjacent in a stacking direction. Each of the negative electrode current collector and the positive electrode current collector includes a bent connecting part sandwiching a notch part and formed by bending two sides in directions opposite to each other. The bent connecting parts of the negative electrode current collectors adjacent in the stacking direction and the bent connecting parts of the positive electrode current collectors adjacent in the stacking direction are connected.

Abstract: Various arrangements of an anode-free battery cell are presented herein. The battery cell can include a lithium ion buffer layer that is located between a electrolyte and an anode current collector. Lithium ions may be stored within the lithium ion buffer layer when the battery cell is charged, which can decrease an amount of swelling within the battery cell.

Abstract: An electrode assembly includes an electrode subassembly forming by winding a first electrode plate and a second electrode plate. The first electrode plate includes a first electrode plate unit. The first electrode plate unit includes a bipolar current collector, a first active layer, and a second active layer. The bipolar current collector is disposed between the first active layer and the second active layer. The first active layer is electrically connected to the second active layer. The second electrode plate includes a composite current collector, a third active layer, and a fourth active layer. The composite current collector is disposed between the third active layer and the fourth active layer. The third active layer is electrically insulated from the fourth active layer. The disclosure further provides a battery including the electrode assembly.

Abstract: A negative-electrode terminal that is secured to a sealing plate is connected to a first negative-electrode current collector. A negative-electrode tab that is connected to the negative-electrode sheet is connected to a second negative-electrode current collector. The first negative-electrode current collector and the second negative-electrode current collector are disposed along the sealing plate. The second negative-electrode current collector has an opening. The second negative-electrode current collector is disposed on the first negative-electrode current collector such that the opening faces the first negative-electrode current collector. The second negative-electrode current collector is welded to the first negative-electrode current collector around the opening.