182 results about "Jelly roll" patented technology

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.

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 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;

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.

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.

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 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.

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.

Wet electrode application techniques used for electrical energy storage devices use toxic solvents that are challenging to work with and difficult to remove. In wet-coating methods the binder partly covers active particles, limiting device performance. Dry electrode film forming techniques are associated with challenging manufacturing. Herein, a partially to fully fibrillated wet electrode or electrolyte application process involves mixing active material with a fibrillatable binder and optionally conductive additive(s), partially to fully fibrillating the mixture, adding a liquid, such as water, and functional additive(s) to form a slurry. The slurry is coated on a current collector or electrode assembly, dried, and roll-pressed. Optionally, the fibrillated wet mixture is adhered to the substrate, then wound into a jelly roll for the manufacture of an electrical energy storage device. A partially to fully fibrillated wet electrolyte coating may be adhered to a fibrillated wet, or dried, electrode film current collector assembly.

The present disclosure provides a jelly roll and a battery. The jelly roll comprises a first electrode plate with a first electrode tab, a separator, and a second electrode plate with a stepped groove opposite to the electrode tab. The stepped groove comprises a first groove and a second groove that are arranged away from the first electrode tab and are in communication in sequence. A projection of the second groove is located within that of the first groove. An active layer ending portion and a termination adhesive tape are provided on one side of a winding tail end of the first electrode plate, which side faces toward the second electrode plate. A head portion of the termination adhesive tape covers the active layer ending portion. Both the head portion of the termination adhesive tape and the active layer ending portion are located in the second groove.

The present disclosure provides a jelly roll and a battery. The jelly roll comprises an electrode assembly, a first adhesive tape and a second adhesive tape; the electrode assembly comprises a straight section, and a first arc bent section and a second arc bent section which are respectively located at two ends of the straight section; tabs are provided in the straight section, and the first arc bent section is away from a winding termination end of the electrode assembly in a winding direction; the first adhesive tape is provided on the outermost side of the first arc bent section, the orthographic projection of the second adhesive tape in the thickness direction of the jelly roll covers the tabs, and the second adhesive tape extends to the first arc bent section. The first adhesive tape and the second adhesive tape both extend beyond the edge of the electrode assembly in a first direction, and the first direction is the width direction of an electrode sheet. By means of cooperation of the first adhesive tape and the second adhesive tape, the problem of the jelly roll being prone to cracking and deformation after multiple cycles can be avoided.

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 activated carbon with a binder and then fibrillating the mixture. 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.

A jelly roll includes an electrode assembly having a structure in which a positive electrode, a separator, and a negative electrode are stacked and wound; and a tubing provided to surround at least a portion of a side surface of the electrode assembly and at least a portion of an end portion perpendicular to a winding axis of the electrode assembly. The tubing is provided to include a hole formed in a central portion of one end portion perpendicular to the winding axis of the electrode assembly, a secondary battery including the jelly roll, a battery pack, and a vehicle.

A full-tab battery electrode sheet assembly, a full-tab battery jelly roll and a sodium-ion battery. The full-tab battery electrode sheet assembly comprises: a positive electrode sheet, which sequentially comprises a positive electrode coated area, a bonding area and a positive electrode blank area in the direction of width thereof, wherein the positive electrode coated area is coated with a positive electrode material, and the positive electrode blank area forms a positive electrode tab after being subjected to winding and flattening treatments; and a negative electrode sheet, which sequentially comprises a negative electrode coated area and a negative electrode blank area in the direction of width thereof, wherein the negative electrode coated area is coated with a negative electrode material, and the negative electrode blank area forms a negative electrode tab after being subjected to winding and flattening treatments. The flattening ratio of the positive electrode tab ranges from 60% to 73%, and the flattening ratio of the negative electrode tab ranges from 75% to 87%. The flattening ratio is obtained by means of dividing the difference between the width of a corresponding tab before flattening and the width of same after flattening by the width of same before flattening.

The tape forming jig includes 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. The tape forming jig also includes 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. A jelly roll taping device includes the tape forming jig. A jelly roll taping method utilizes the tape forming jig.

A first aspect of the present application provides a battery jelly roll, which is formed by winding a positive electrode sheet, a negative electrode sheet, and a separator between the positive electrode sheet and the negative electrode sheet. At least one surface of the positive electrode sheet is provided with a positive electrode coating, and at least one surface of the negative electrode sheet is provided with a negative electrode coating. The negative electrode coating comprises a negative electrode active material; the negative electrode active material at least comprises a silicon material and a carbon material, and the weight percentage of the silicon material in the negative electrode active material is Y%; and the tortuosity of the separator is X, X being greater than or equal to 0.15Y0.5+1.8. A second aspect of the present invention provides a cylindrical battery, comprising the battery jelly roll, a cap, and a steel shell. The interior of the steel shell accommodates the battery jelly roll, and the top of the steel shell is sealed with the cap. In the present application, the tortuosity of the separator is designed on the basis of the proportion of the silicon-based material in the negative electrode active material, which can greatly reduce the penetration of iron and nickel elements into the central area, thereby significantly improving the cycle performance and safety performance of the battery cell.