236 results about "Jelly roll" patented technology

A battery includes a jelly roll and a case. The case includes a first shell and a second shell; the first shell has an accommodation cavity therein, the first shell is provided with an opening communicated with the accommodation cavity, the jelly roll is disposed in the accommodation cavity, and the second shell blocks the opening. An explosion-proof score is provided in the first shell and / or the second shell. A burst pressure of the explosion-proof score is P, a tensile strength of a material of the case is σb, a diameter of the first shell (2) is D, a wall thickness of the case is H, and a depth of the explosion-proof score (211) is h. In a case where the explosion-proof score is linear,P=(H-h)⁢ σbD-0.6⁢(H-h);or in a case where the explosion-proof score is curved,P=2⁢(H-h)⁢ σbD-1.2⁢(H-h).

A cylindrical battery cell comprising a jelly roll assembly comprising an anode sheet, a cathode sheet, a rubbing region formed at an uncoated region at the end of one of the anode sheet and the cathode sheet. The cylindrical battery cell further includes one or more separator sheets that separate the anode from the cathode and a header, a weld plate that provides an electrical connection between the jelly roll assembly and the header, and an outer housing and an insulator that separates the jelly roll assembly from the outer housing. The insulator includes a neck portion, an angular portion, a skirt portion, and a tapered portion. The neck portion is positioned between the outer housing and an extension portion of the weld plate. The angular portion is positioned between the neck portion and the skirt portion and positioned between the rubbing region and the outer housing.

A method of manufacturing a lithium-sulfur battery in a cylindrical cell format is provided. In some aspects, the method includes providing an anode current collector and providing an anode on the anode current collector. The method may include depositing a protective layer on and along the length of the anode, providing a cathode current collector opposite to the anode, and providing a cathode on the cathode current collector. The method may include providing a separator between the anode and the cathode, disposing an adhesive carbon-containing layer along the bottom edge of the anode (e.g., to replace one or more conventional anode tabs), and dispersing an electrolyte throughout the lithium-sulfur battery. The method may include forming the lithium-sulfur battery in the cylindrical cell format by collectively winding into a jelly roll.

Electrical energy storage devices made using a wet electrode application technique are associated with high energy consumption. Herein, a dry electrode or electrolyte application process involves mixing active material with a binder and then fibrillating the mixture. During preparation of the mixture, the smallest particles are removed to improve binding. The mixture is roll-pressed into a film, which is then actively cooled. Optionally, tension in the cooled portion of the film is increased for spooling the film. The film is adhered to a pre-treated current collector and then wound into a jelly roll for the manufacture of an electrical energy storage device.

Disclosed are an electrode assembly and a cylindrical lithium-sulfur battery cell including the same, and a battery pack and a vehicle including the cylindrical lithium-sulfur battery cell. According to an embodiment of the present disclosure, there is provided a jelly roll type electrode assembly having a structure in which a positive electrode plate, a negative electrode plate, and a separator interposed therebetween are wound in one direction and having a center hole formed therein, the electrode assembly including a center pin that is inserted into the center hole to press the electrode assembly.

A battery cell (100), comprising a jelly roll (2) that comprises a plurality of electrode plates (21). A tab (22) and a cut edge (23) are provided at two ends of each electrode plate (21), respectively; the plurality of electrode plates (21) are classified into first electrode plates (211) and second electrode plates (212) which are arranged in sequence and have opposite polarities; the tabs (22) having opposite polarities are located on different sides of the jelly roll (2); the tabs (22) located on the same side are electrically connected to a first connecting surface (31) of a connector (3); and on the same side of the jelly roll (2), the distance between the first connecting surface (31) and the cut edge (23) is L, the number of electrode plates (21) having the same polarity is n, the number of bending layers of the tabs (22) is m, the thickness of the battery cell (100) is T, and the thickness of each electrode plate (21) is t, satisfying: 0.5≤N＝(L-5-0.1*T / 2) / (n*m*t)≤15.

A cylindrical battery, characterized in that it comprises a casing and a jelly roll, the jelly roll being positioned within the casing and the jelly roll having a jelly roll hole; the cylindrical battery also comprises a pressure relief structure and a current collector, the pressure relief structure and the current collector being provided at two ends of the casing in the axial direction, the current collector being electrically connected to a tab extending from the jelly roll, the current collector comprising a protrusion portion configured to be electrically connected to a pole piece assembly of the cylindrical battery, the protrusion portion having a chamber communicating with the jelly roll hole, the distance between the surface of the protrusion portion facing the jelly roll and the end surface of the negative electrode of the jelly roll facing the current collector is "h" in units of mm;is the radial dimension of the jelly-roll hole “D” in units of mm; where h / D = 0.2 to 1.8;

A forming device and a forming method thereof bends an electrode tab portion that is exposed to the end portion of a jelly roll-type electrode assembly in the axial direction thereof, in a radial direction. The forming device may include a forming jig bending the electrode tab, and a flattening jig flattening the bent electrode tab further. The forming jig comprises a pre-forming perimeter surface and a bend inducing surface. The pre-forming perimeter surface has an inner radius that increases from a base end toward a leading end elongated in a pressing direction. The bend inducing surface connects to the base end of the pre-forming perimeter surface, and extends inwards, in the radial direction.

Battery, characterized in that it comprises: a cylindrical jelly roll comprising an electrode, a separator, and a tab, the electrode comprising a positive electrode and a negative electrode stacked on top of each other, the tab comprising a positive tab and a negative tab, the positive electrode provided with the positive tab extending outwardly from a side edge of the positive electrode, wherein the negative electrode provided with the negative tab extends outwardly from a side edge of the negative electrode, and wherein the separator is provided between the positive electrode and the negative electrode; wherein, in a state where the cylindrical jelly roll is unfolded, the width direction of the electrode is a first direction, the length direction of the electrode is a second direction, and the electrode is provided with a plurality of tabs at intervals along the length direction on one side in the first direction, a gap is formed between two adjacent tabs extending along the first direction, the gap is provided to be open at an end remote from the electrode, a distance between the end of the gap near the electrode and the electrode is h1 mm, the side of the separator near the tab extends beyond the electrode in the first direction, the distance between the side of the separator near the tab and the side of the electrode provided with the tab is h2 mm, where h1 > h2.

A battery cell cover plate (100), a battery cell (200), and a battery pack. The battery cell cover plate (100) comprises a cover plate body (10); the cover plate body (10) has a top surface (11) and a bottom surface (12) which are opposite to each other, and a liquid injection hole (13) is formed in the cover plate body (10); and the liquid injection hole (13) runs through from the top surface (11) to the bottom surface (12). The bottom surface (12) is configured to face a jelly roll (220); at least partial area of the bottom surface (12) is configured to be a flow guide surface (121); the flow guide surface (121) is adjacent to the liquid injection hole (13); and the flow guide surface (121) is inclined from the liquid injection hole (13) to a direction away from the top surface (11).

An electrode sheet (10), a jelly roll, a cylindrical battery, and a battery pack. A plurality of tabs (20) are arranged at intervals on one side of the electrode sheet (10). In a first direction, the electrode sheet (10) comprises at least two segments (30). Each segment (30) has at least one tab (20). The width of each tab (20) is in the first direction, and the height of each tab (20) is in a second direction, with the second direction being perpendicular to the first direction. For the tabs (20) in the same segment (30), the tabs (20) have the same width and the same height. For tabs (20) in different segments (30), at least one of the width and height of the tabs (20) is different.

A secondary battery, a battery pack, and an energy storage cabinet. The secondary battery includes a case and a jelly roll arranged in an accommodating cavity of the case. Along a height direction of the secondary battery, a side of the jelly roll is provided with a bending section, a bottom wall of the case is provided with a first recessed portion recessed towards an interior of the secondary battery, and a first protruding portion is correspondingly formed at an inner side of the bottom wall. At least part of the bending section is located at a side of the first protruding portion along a width direction of the secondary battery. A contact area between the bottom wall and the jelly roll is increased, and a contact area between the heat exchange member and the secondary battery is increased, to improve heat dissipation efficiency.

The tape forming jig according to the present disclosure may include a forming plate including a plate body, and a forming hole formed through the thickness direction of the plate body and configured such that the diameter thereof becomes narrower from a first surface of the plate body to a second surface opposite to the first surface; and a forming block provided to be able to enter the forming hole with a cross-section corresponding to the shape of the forming hole as viewed from the outside of the second surface of the plate body.

The present invention relates to a battery cell, and addresses the technical problem of providing a battery cell including an insulating mechanism for preventing deformation of a central portion of an electrode assembly wound in a jelly roll shape. To this end, the present invention provides a battery cell comprising: a cell case; a jelly roll which is formed by winding an electrode assembly and is accommodated in the cell case and has a hollow space that extends in the longitudinal direction; and insulating mechanisms including insulating disks which overlap the jelly roll, and deformation prevention parts which protrude from the insulating disks so as to be fitted into the hollow space.

A membrane assembly for extracting water from ambient air or seawater includes a manifold tube surrounded by a membrane web arranged about the manifold tube in a spiral configuration. The manifold tube has an entrance end, an exit end, web entrance ports, and web exit ports. The web membrane has a first osmosis membrane, a second osmosis membrane, a barrier layer positioned between the first osmosis membrane and the second osmosis membrane to form a first fluid flow conduit in fluid communication with the web entrance ports and a second fluid flow conduit in fluid communication with the web exit entrance ports and an end of the first fluid flow conduit. The web membrane also has a first porous structural material layer positioned within the first and second fluid flow conduit, and a second porous structural material layer positioned about the first osmosis membrane.

A wearable device is disclosed. The wearable device may comprise: a speaker including a coil; a coin cell battery disposed on the speaker; and a conductive tab on a first surface of a case of the coin cell battery, the conductive tab being electrically connected to a portion of a first electrode positioned on the first surface of the case. The coin cell battery can include: the case that includes the first surface facing the speaker and a second surface opposite to the first surface; and a jelly roll. The conductive tab on the first surface of the case can extend in a second rotational direction opposite to the first rotational direction of the jelly roll so as not to overlap the coil of the speaker.

An electrode assembly according to the present invention is a jelly roll-type electrode assembly manufactured by winding a negative electrode, a separator, and a positive electrode together from ends thereof, the electrode assembly comprising a negative electrode which is manufactured by applying a negative electrode active material to a surface of a negative electrode collector and which has, formed on one end thereof, a negative electrode collector-exposed portion that is not coated with the negative electrode active material to expose the surface of the negative electrode collector. The negative electrode is wound together with a separator and a positive electrode such that the negative electrode collector-exposed portion is disposed in a central region where the winding starts, and a negative electrode tab is coupled to the negative electrode collector-exposed portion.

A method is provided to inspect weld states of a cylindrical battery. The cylindrical battery may include: a cylindrical jelly roll in which a first current collector, a first separator, a second current collector, and a second separator are sequentially stacked and wound, so as to extend in the vertical direction; a first collector plate which is coupled to the upper end of the jelly roll and to the lower surface of which the first current collector is firstly welded; and a second collector plate which is coupled to the lower end of the jelly roll and to the upper surface of which the second current collector is secondly welded. The method may include a first measurement step, a second measurement step, a first weld determination step, and a second weld determination step.

The invention relates to a battery cell (10) for an electrical energy storage device of an at least partially electrically operated motor vehicle, comprising a housing (12), wherein a jelly roll (14) is arranged inside the housing, and wherein the jelly roll (12) is wound around a mandrel (20), characterized in that the mandrel (20) is designed as a polymeric material.

An electrode sheet (1), a jelly roll (100) and a battery (1000). The electrode sheet (1) comprises a first sheet body (10) and a second sheet body (20), wherein the first sheet body (10) has a sheet body portion (11) and a tab portion (12), the width of the second sheet body (20) is less than the width of the first sheet body (10), and the second sheet body (20) is connected to one end of the first sheet body (10). The second sheet body (20) is wound to form a wetting channel (101). The wetting channel (101) comprises a port arranged close to the tab portion (12). The sheet body portion (11) is wound around the periphery of the second sheet body (20), the tab portion (12) is configured to be bent towards the port and arranged around the port, and the end of the tab portion (12) away from the sheet body portion (11) encloses to form a through opening (102) in communication with the wetting channel (101). The through opening (102) is in communication with the wetting channel (101), thereby helping an electrolyte to thoroughly wet the electrode sheet (1).

A jelly-roll type electrode assembly includes a first separator, a negative electrode, a second separator, and a positive electrode, which are sequentially laminated and wound using a mandrel with a heating element. The jelly-roll type electrode assembly further includes a core portion comprising a flexible film disposed between the first separator and the second separator. A length in a longitudinal direction of the flexible film ranges from 100% to 150% based on 100% of an inner circumference of the jelly-roll type electrode assembly. A tensile strength of the flexible film after heating ranges from 18 kgf / mm2 to 25 kgf / mm2. Also provided is a method for manufacturing a jelly-roll type electrode assembly, and a secondary battery including the same.

The present disclosure relates to the technical field of batteries. Provided are a cylindrical battery and a preparation method therefor. The cylindrical battery provided by the present disclosure comprises: jelly rolls, casings, an upper cover plate and a lower cover plate, wherein at least two jelly rolls are provided; the (n+1)th jelly roll is wound on an outer side wall of the nth jelly roll, where n is an integer greater than or equal to 1; adjacent jelly rolls are spaced apart by the casing; the casing wraps an outer side wall of the outermost jelly roll; and the upper cover plate is located on an upper bottom face of the jelly rolls, the lower cover plate is located on a lower bottom face of the jelly rolls, and the upper cover plate and the lower cover plate are sealingly connected to the casings, such that each jelly roll is located in a separate enclosed space. The cylindrical battery has a good heat dissipation performance, and thus the phenomenon of heat "accumulation" inside the battery is greatly reduced; and electrolytes having different functions can be injected into different jelly rolls, thereby reducing the phenomenon of the uneven performance degradation of the battery and prolonging the service life of the battery.

An apparatus detects a defect in a secondary battery. The secondary battery includes a jelly-roll having first and second electrode tabs, and an electrode non-coated portion wound around an outermost periphery thereof. The apparatus includes a first contact unit configured to contact any one of the first electrode tab and the second electrode tab; a second contact unit configured to contact at least a part of the electrode non-coated portion and come into contact with the jelly-roll by moving in a direction of a center of the jelly-roll; and an inspection unit configured to detect whether the jelly-roll is defective by measuring one or more of current, voltage, and resistance of the jelly-roll by an electric contact with the first and second electrode tabs.

An electrode assembly, a cylindrical lithium-sulfur battery cell including the same, a battery pack including the cylindrical lithium-sulfur battery cell, and a vehicle are disclosed. An electrode assembly according to an embodiment of the present invention has a structure in which a positive electrode plate, a negative electrode plate, and a separator interposed therebetween are wound in one direction, and is a jelly roll type electrode assembly having a central hole, and includes a center pin inserted into the central hole to pressurize the electrode assembly.

The present invention relates to a negative electrode for a secondary battery and a jelly-roll type electrode assembly comprising the same. The negative electrode satisfies a certain range of a creep rate condition represented by Formula 1 by having a negative electrode current collector, and when applied to a jelly-roll type electrode assembly, even though it contains a silicon-based negative electrode active material, since the stress generated from the outer edge portion is significantly low, it is possible to control the deformation and / or swelling of the electrode assembly, and since the stress accumulated in the negative electrode current collector is greatly reduced, the risk of internal disconnection of the electrode assembly is reduced, and thus excellent safety can be ensured.

The battery cell comprises a housing, a jelly roll, and a current collector disk, wherein an accommodating cavity is formed in the housing, a terminal is provided at one end of the housing, and the terminal is insulated from the housing; the jelly roll is mounted in the accommodating cavity, and a first tab and a second tab are provided at the end of the jelly roll corresponding to the terminal; and the current collector disk is sandwiched between the housing and an end of the jelly roll, a clearance through hole is formed in the current collector disk, the first tab passes through the clearance through hole and is conductively connected to the terminal, and the current collector disk is conductively connected to each of the second tab and the housing.

A secondary battery, a battery pack, and an electrical device. By means of configuring a through hole (311) in a first cover body (310), connection and assembly processes of a current collecting disc (400) and a jelly roll (200) can be completed using the through hole (311), thereby reducing the difficulty of connection and assembly of the current collecting disc (400) and the jelly roll (200) and improving the assembling efficiency. The area S1 of the through hole (311) and the orthographic projection area S2 of the first cover body (310) on a plane perpendicular to the height direction of the secondary battery are configured such that same satisfy 0.13≤S2 / S1≤1.5, so that the through hole (311) has more space for completing the connection and assembly of the current collecting disc (400) and the jelly roll (200), and the connection area between the current collecting disc (400) and the jelly roll (200) can be effectively increased.

This application relates to a bottom support for battery cell, a battery cell, a battery, and an electric device. The bottom support is configured for supporting a jelly roll, and the bottom support includes a bottom plate, where the bottom plate includes a central region and a peripheral region surrounding the central region. The bottom plate is constructed to form at least one recessed group, and a recessed area increases gradually among the recessed group(s) in a direction from the peripheral region to the central region of the bottom plate. The bottom support for battery cell, the battery cell, the battery, and the electric device provided in this application reduce the probability of thermal runaway in the battery cell.

Embodiments of the present technology may include flexible all-solid-state lithium-ion batteries. The batteries may include a plurality of jelly roll battery cells. Each jelly roll battery cell may include a cathode, an anode. and a hybrid solid electrolyte membrane. The cathode may be or include a first self-supporting lithium-based composite. The anode may be or include a second self-supporting lithium-based composite. The hybrid solid electrolyte membrane may be positioned between the cathode and the anode.