270results about "Wound/folded electrode electrodes" patented technology

To provide a wound electrode body that can improve heat dissipation on the inside of the winding. [Solution] The wound electrode body 10 is a wound electrode body 10 in which a first electrode 11A and a second electrode 11B having a different polarity from the first electrode 11A are wound in a flat shape via a separator 12. In the wound electrode body 10, the first electrode 11A includes a resin substrate, a conductive layer provided on the surface of the resin substrate, and a first active material layer 200A provided on the main surface of the conductive layer located on the side opposite to the side where the resin substrate is located relative to the conductive layer. The portion of the resin substrate located on the inside of the wound electrode body 10 has higher heat dissipation than the portion located on the outside of the wound electrode body 10.

The present invention provides a power storage cell capable of suppressing the exposure of the insulating support layer due to crack formation in the conductive layer laminated on the insulating support layer. [Solution] The energy storage cell 100 comprises an electrode body 10 and a case 20 that houses the electrode body 10. The electrode body 10 includes a first electrode 10A. The first electrode 10A has an insulating support layer 110 and a first conductive layer 111 and a second conductive layer 112 formed on the insulating support layer 110. Each of the first conductive layer 111 and the second conductive layer 112 is formed of flaky metal powder 113.

To provide an energy storage cell that allows for a simplified configuration of the wound electrode body. [Solution] The energy storage cell 100 comprises a conductive winding core 90, a wound electrode body 10 including a first electrode sheet 10A and a second electrode sheet 10B wound around the winding core 90, and a first connecting member 50A and a second connecting member 50B positioned opposite the wound electrode body 10 in the Z direction in which the winding core 90 extends. The winding core 90 has a rectangular parallelepiped shape. The first electrode 91 of the winding core 90 is connected to the first electrode sheet 10A and the first connecting member 50A, respectively. The second electrode 92 of the winding core 90 is connected to the second electrode sheet 10B and the second connecting member 50B, respectively.

To provide a method for manufacturing a battery assembly that prevents a short separator or an end of a positive electrode from breaking in a battery assembly in which a negative electrode, a separator, and a positive electrode laminate are wound up, a battery assembly, and a secondary battery including the battery assembly.SOLUTION: A battery assembly 10 includes a negative electrode 1, a first separator 3a, a positive electrode 2, and a second separator 3b stacked and wound up, and the negative electrode includes a negative electrode active material portion 1a in which a negative electrode active material is stacked on both sides of the negative electrode current collector, and a negative electrode uncoated portion 1b in which a negative electrode active material is not stacked on the negative electrode current collector. The negative electrode uncoated portion is wound around the outermost periphery of the battery assembly and further includes a first sealing tape 4 attached to a winding end of at least one of the negative electrode, the first separator, the positive electrode, and the second separator. At least one of the first separator and the second separator and at least one of the negative electrode and the positive electrode are attached to one side of the first sealing tape.SELECTED DRAWING: Figure 2

This invention discloses a battery, a battery pack, and an electrical device. The battery includes a casing, a core, a column, a first membrane, and a second membrane. The casing has an inner cavity, and the core is assembled within the inner cavity. The column supports the core to prevent it from collapsing. The column has a first cavity for storing a lithium replenishment medium and a second cavity for storing a fire-fighting medium. The first cavity has a first hole in its wall, and the second cavity has a second hole in its wall. The first membrane seals the first hole. When subjected to a first pressure, the first membrane ruptures, allowing the lithium replenishment medium in the first cavity to flow into the inner cavity through the first hole. The second membrane seals the second hole. When subjected to a second pressure, the second membrane ruptures, allowing the fire-fighting medium in the second cavity to flow into the inner cavity through the second hole. The second pressure is greater than the first pressure. The battery of this invention enables secondary lithium replenishment, improving the problems of short battery life and severe battery degradation. Furthermore, it has a fire-fighting function in the event of thermal runaway or rapid gas generation, ensuring the safety of battery use.

An electrochemical device includes a housing, an electrode assembly, and an insulating tape. The electrode assembly includes a first electrode plate, a second electrode plate and a separator. The insulating tape includes a body portion and a first connecting portion. The electrode assembly includes a first surface and a second surface opposite to each other. The body portion is disposed on the first surface, and is fixedly bonded to the electrode assembly and the housing separately. The first connecting portion is formed together with the body portion in one piece. A first end of the first connecting portion is connected to the body portion, and a second end of the first connecting portion is disposed on the second surface, and is fixedly bonded to the electrode assembly and the housing separately. The first connecting portion is bonded to an edge of the separator.

Disclosed is a cylindrical battery including a pressure sensor, and an apparatus for monitoring a swelling pressure. The cylindrical battery includes an electrode assembly in which a first electrode, a second electrode, and a separator interposed therebetween are wound based on a winding axis to define a core and an outer circumference; a battery housing having an open end and a closed portion opposing thereto, configured to accommodate the electrode assembly in a space between the open end and the closed portion, and electrically connected to one of the first electrode and the second electrode to have a first polarity; a sealing body configured to seal the open end of the battery housing; a terminal electrically connected to another of the first electrode and the second electrode and having a surface exposed to an outside; and a pressure sensor interposed between an outer circumference of the electrode assembly and an inner circumference of the battery housing and configured to sense a swelling pressure applied by the outer circumference of the electrode assembly to the inner circumference of the battery housing and output a pressure sensing signal to the outside.

A secondary battery is provided and including a wound body including a positive electrode and a negative electrode includes a positive electrode tab and a protective tape. The positive electrode tab includes a tab root portion disposed on a positive electrode current collector and a tab projecting portion projecting from the wound body. The protective tape includes a tape root portion covering the tab root portion and the positive electrode current collector, and a tape projecting portion projecting from the wound body. The tape projecting portion has a first partial projecting portion covering the tab projecting portion and a plurality of second partial projecting portions not covering the tab projecting portion. The tab projecting portion, the first partial projecting portion, and the plurality of second partial projecting portions are bent.

A cylindrical battery, an electrode assembly included therein, and a method for manufacturing the same are disclosed. The electrode assembly has a cylindrical shape formed by winding a stack, in which a separator is interposed between a positive electrode and a negative electrode multiple times to have a winding core, and includes a fixing tape configured to fix the separator exposed at the winding core to an inner surface of the electrode assembly.

To provide a wound electrode body that can reduce the number of parts. [Solution] The wound electrode body 10 includes a separator 110 in which a first electrode region R1 and a second electrode region R2, each provided with an electrode layer, are alternately arranged with a gap between them. The wound electrode body 10 is formed by winding the separator 110 such that the direction in which the first electrode region R1 and the second electrode region R2 are aligned is aligned with the winding direction.

A battery cell according to one embodiment of the present disclosure includes an electrode assembly in which a first electrode, a second electrode, and a separator interposed therebetween are wound around a winding axis, wherein the first electrode includes a first uncoated portion that is not coated with an active material layer at a long side end along the winding direction and is exposed to the outside of the separator, and at least a part of the first uncoated portion is used as an electrode tab in itself; a battery housing including an opening on one side and configured to accommodate the electrode assembly through the opening; a cell terminal configured to pass through a surface positioned on an opposite side of the opening of the battery housing; and a current collector including a first uncoated portion coupling part disposed on one side of the electrode assembly and configured to be welded to the first uncoated portion, a terminal coupling part spaced apart from the first uncoated portion coupling part and configured to be welded to the cell terminal, and a connection area provided between the first uncoated portion coupling part and the terminal coupling part, wherein the connection area includes a plurality of slits spaced apart at regular intervals in the circumferential direction and having a convex shape toward an outer side in the radial direction.

Embodiments of the present application provide an electrode assembly, a battery cell, a battery, and a method and a device for manufacturing an electrode assembly, which belong to the technical field of batteries. Where, the electrode assembly includes a first electrode plate, a second electrode plate, and a support member. The first electrode plate and the second electrode plate are wound in a winding direction to form a winding structure, and the winding structure includes a bending area. At least a part of the support member is bent and arranged in the bending area, and the support member is configured to provide a support force to a part of the first electrode plate and / or the second electrode plate located at an outer side of the support member. The support member can provide a support force to the part of the first electrode plate and / or the second electrode plate located at the outer sided of the support member, that is, the support member can provide a support force to an electrode plate located at the outer side of the support member, so that the electrode plate at the outer side of the support member is not easy to shrink and deform inward, the structural stability of the entire electrode assembly is improved, and the battery performance is ensured.

To provide: a negative electrode capable of significantly increasing capacity while maintaining battery characteristics; and a method for manufacturing such negative electrode.SOLUTION: A negative electrode includes: a negative electrode current collector having a roughened surface; and a negative electrode active material provided on the negative electrode current collector. The negative electrode active material comprises negative electrode active material particles including a compound of lithium, silicon, and oxygen. The negative electrode active material particles can be represented by SiOxLiy, and a value of x is 0.8 or more and 1.2 or less, and a value of y is 0.5 or more and 3.4 or less. The negative electrode active material has a multilayer structure composed of two or more layers. In Si2p bond energy obtained by X-ray photoelectron spectroscopy analysis of a layer interior in each layer of the negative electrode active material having the multilayer structure, intensity of a peak A acquired in the vicinity of 98 eV and intensity of a peak B acquired in the vicinity of 100.5 eV have a relation (intensity of peak A)≥(intensity of peak B).SELECTED DRAWING: Figure 1

A monitoring device according to one embodiment disclosed herein may include a communication circuit, a processor, and a memory configured to store instructions, wherein, when executed by the processor, the instructions allow the monitoring device to acquire an image of a jelly roll including a positive electrode, a separator, and a negative electrode through the communication circuit, detect starting points of the positive electrode and the negative electrode from the image, and calculate input amounts of the positive electrode and the negative electrode included in the jelly roll based on the starting points.

A buffer member (10), a battery cell (100), a battery (1000), and an electrical apparatus (2000). The buffer member (10) is used inside the battery cell (100), and the battery cell (100) comprises an electrode assembly (20). The buffer member (10) comprises: a first surface (11) and a second surface (12) which are arranged opposite to each other; and through channels (14) penetrating through the first surface (11) and the second surface (12), wherein the buffer member (10) can be compressed for buffering the expansion of the electrode assembly (20), and the through channels (14) are used for increasing the compressibility of the buffer member (10).

Electrode assembly and secondary battery including the same. The present invention relates to an electrode assembly in which a first electrode, a separator, and a second electrode are stacked and wound, the first electrode including a current collector and an electrode active material layer provided on the current collector, an edge portion of the current collector provided on a side of an end portion of a winding axis of the electrode assembly including a coating-free portion having no electrode active material layer, and the coating-free portion of the first electrode being bent one or more times in a direction from a winding center of the electrode assembly to an outer contour of the electrode assembly.

Having an electrode arrangement: a first electrode; a second electrode; and a separator arranged between the first electrode and the second electrode, wherein the first electrode, the second electrode and the separator are wound around a winding axis in one winding direction and thus define a core and an outer circumference of the electrode arrangement, wherein the first electrode has a first active material section coated with an active material layer along the winding direction and a first uncoated section not coated with an active material layer and exposed beyond the separator, wherein the first uncoated section comprises a first section adjacent to the core of the electrode arrangement, a second section adjacent to the outer circumference of the electrode arrangement, and a third section between the first section and the second section, wherein the third section has several segments spaced apart along the winding direction by forming a cutting groove in several along the winding axis direction, and The height of the first section is relatively smaller than the height of the uncoated section on the underside of the cut groove.

An electrode sheet, including a current collector (1) and an active material layer (2) applied on either side of the current collector (1). The active material layer (2) on at least one side of the current collector (1) is provided with a plurality of first regions (3) in a first direction, with a region gap Dm between adjacent first regions (3). Each of the first regions (3) is provided with a plurality of grooves (31), and adjacent grooves (31) are spaced apart by a distance Dt in a direction perpendicular to a long axis of each of the grooves (31), where Dt > Dm. The first direction is a length direction or width direction of the electrode sheet.

A secondary battery, a battery pack, and an electronic device are provided. The secondary battery includes a housing; an electrode assembly accommodated in the housing, in which the electrode assembly is formed by stacking a first electrode, a separator, and a second electrode; the first electrode includes a first current collector, and a partial area of at least one surface of the first current collector is covered with a conductive layer and an insulation layer along a preset direction; the conductive layer is covered with a first active material layer, and the first active material layer at least partially covers the insulation layer; setting that a thickness of the conductive layer is m, and a thickness of the insulation layer is n, then n≤m.

The present application provides an electrode assembly, a battery, a battery module, a battery pack and a powered device. The electrode assembly comprises a first electrode piece, a second electrode piece with opposite polarity to the first electrode piece, and a separator arranged between the first electrode piece and the second electrode piece; the electrode assembly is obtained by winding the first electrode piece, the second electrode piece and the separator; and the separator comprises a base film and a coating provided on at least part of the surface of the base film, and the coating comprises a hydraulic inorganic material capable of hardening upon reaction with water. The present application can solve the problem of central hole collapse in the electrode assembly and the battery, and improve the safety performance and cycle performance of the battery.

The application relates to the technical field of battery cell processing, in particular to a battery cell preheating and hot-pressing device. The battery cell preheating and hot-pressing device preheats the battery cell through a preheating clamping mechanism. The battery cell is in contact with a preheating clamping piece of the preheating clamping mechanism, the preheating clamping piece has a heating function, the battery cell is preheated through the contact mode, the preheating efficiency is higher, compared with the preheating mode of the battery cell through heat radiation, the preheating efficiency of the battery cell is improved through the contact mode, and the technical problem that the current battery cell preheating mode needs a long time and the low preheating efficiency of the battery cell leads to the low battery cell shaping efficiency is solved.

Provided are a cylindrical electrode assembly and a tab-less secondary battery employing the same which uses the ends of electrode sheets without active material as electrode tabs. The electrode assembly structure prevents the risk of short circuits in the core section thereof and secures an additional current path in the core section, thereby reducing heat generation due to internal resistance. The core section of the electrode sheet is provided with a plateau that protrudes axially outward and extends in the lengthwise direction from an incision groove defining a segmented tab, the segmented tab is bent radially inward, and the upper end of the plateau is in contact with and is electrically connected to the unbent segmented tab.

A gasket has: an annular part that abuts the bottom surface of a sealing body; a bottom part that is positioned closer than the annular part to an electrode body and that presses the electrode body; and a coupling part that couples the annular part and the bottom part and that inclines towards the center in the radial direction with proximity to the bottom part. The bottom part is provided with a first through hole that is positioned so as to include the center in the radial direction, and a plurality of second through holes that are positioned at a peripheral part.

Provided is a technique for suppressing a surface pressure of an electrode assembly from becoming non-uniform. A herein disclosed electricity storage device includes an electrode assembly, a case, and a spacer. An outer surface of the electrode assembly includes a first surface on one of end parts in a laminate direction, a second surface on the other end part in the direction, and a third surface between the first surface and the second surface. The first surface, the second surface, and the third surface are configured by the separator. A first end part in a longitudinal direction of the separator is arranged on the third surface. The separator includes a first area containing the first end part and arranged on the third surface. The first area is configured to cover a part of the spacer, and a joint part where the first area is joined to the spacer.

The embodiments of this disclosure provide an electrode assembly and manufacturing method and device, battery cell, battery, electric device, the electrode assembly is used for a battery cell (100) and includes: a first electrode sheet (1) and a second electrode sheet (2) of opposite polarities, wherein the first electrode sheet (1) and the second electrode sheet (2) both include a main body (11) and at least one tab group (12), the first electrode sheet (1) and the second electrode sheet (2) are winded around a winding axis (K) such that their respective main bodies (11) overlap to form a winding body (S), and after the main bodies (11) have been winded a plurality of electrode sheet layers (111) are formed along a radial direction of the winding main body (S); wherein, the tab group (12) includes a plurality of stacked tabs (12') which protrude from the main body (11), and at least two adjacent tabs (12') in the tab group (12) are separated by at least one electrode sheet layer (111) of same polarity in the radial direction.

A herein disclosed manufacturing method of a secondary battery is a manufacturing method of a secondary battery that includes a wound electrode assembly and a battery case. The herein disclosed manufacturing method of the secondary battery comprising: an arranging step for arranging the plural wound electrode assemblies inside the battery case; a peeling step for peeling off at least one, among the positive electrode and the negative electrode, and the separator; and a liquid injection step for performing a liquid injection of the electrolyte solution into the battery case. At the peeling step, at least one, among the positive electrode and the negative electrode of each wound electrode assembly, and the separator are peeled off to make a state where a peeled area is formed on each of the plural wound electrode assemblies.

One objective of the present disclosure is to suppress a voltage drop due to foreign matter mixing in a secondary battery with a winding body having a positive electrode and a negative electrode. A secondary battery with a winding body having a positive electrode and a negative electrode comprises a positive electrode tab and a protective band. The positive electrode tab has a tab base section arranged on a positive electrode current collector and a tab projection section extending from the winding body. The protective band has a band base section covering the tab base section and the positive electrode current collector, and a band projection section extending from the winding body.The band extension section has a first partial extension section that covers the tab extension section and a plurality of second partial extension sections that do not cover the tab extension section. The tab extension section, the first partial extension section, and the plurality of second partial extension sections are curved.

The power storage cell includes an electrode assembly and a case that houses the electrode assembly. The electrode assembly includes a first electrode. The first electrode includes an insulating support layer, and a first conductive layer and a second conductive layer that is formed on the insulating support layer. Each of the first conductive layer and the second conductive layer is formed of flaky metal powder.

A secondary battery and an electronic apparatus are provided. The secondary battery includes a housing and an electrode assembly. The electrode assembly includes a negative electrode sheet and a positive electrode sheet. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. Along a first direction, the number of layers of the positive electrode active material layer in the electrode assembly is N. The electrode assembly includes a first end and a second end opposite to each other along a second direction perpendicular to the first direction. At the first end, an edge of the positive electrode active material layer is a first edge, and an edge of the negative electrode active material layer is a second edge. A distance in the second direction between the first edge of each layer of the positive electrode active material layer and the second edge closest to the first edge along the first direction is D. Along the second direction, a dimension of the positive electrode active material layer is D1, and a dimension of the negative electrode active material layer is D2. Among the N layers of the positive electrode active material layer, n layers satisfy the following condition: D ≤ 0.38 (D2 - D1). The electrode assembly can improve the reliability and service life of the secondary battery.

An embodiment of the present invention relates to a secondary battery and addresses the technical problem of providing a secondary battery capable of improving structural stability. To this end, the present invention provides a secondary battery comprising: an electrode assembly which comprises a first electrode plate having a first electrode-uncoated portion along an upper end thereof, a second electrode plate having a second electrode-uncoated portion along a lower end thereof, and a separator interposed between the first electrode plate and the second electrode plate, wherein at least one among the first electrode-uncoated portion and the second electrode-uncoated portion includes a reinforcing portion for reinforcing verticality; a can for accommodating the electrode assembly; a cap assembly for sealing the can; a first current collector plate coupled to an upper end of the first electrode-uncoated portion and electrically connected to the cap assembly; and a second current collector plate coupled to a lower end of the second electrode-uncoated portion and electrically connected to the can.