140 results about "Jelly roll" patented technology

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.

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.

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 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.

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.

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.

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.

The present disclosure provides a cylindrical battery and a method for preparing the same, which belongs to the technical field of batteries. The cylindrical battery according to the present disclosure includes a jelly roll, a housing, an upper cover plate, and a lower cover plate. There are at least two jelly rolls, and the (n+1)th jelly roll is wrapped around the outer wall of the nth jelly roll, where n is an integer greater than or equal to 1. Adjacent jelly rolls are separated by a housing, and the outer wall of the outermost jelly roll is covered by the housing. The upper cover plate is located on the upper surface of the jelly roll, and the lower cover plate is located on the lower surface of the jelly roll. The upper cover plate and the lower cover plate are respectively hermetically connected to the housing, so that each jelly roll is located in an independent sealed space. The cylindrical battery has good heat dissipation properties, greatly reducing the phenomenon of "internal accumulation" of heat in the battery. Different jelly rolls can be injected with electrolytes with different functions, reducing the phenomenon of uneven performance decay of the battery and extending the service life of the battery.

A jelly roll includes a positive electrode plate, a negative electrode plate and a separator located therebetween. The positive electrode plate includes a first surface and a second surface opposite to each other in a first direction, the positive electrode plate is provided with a plurality of protruding portions and straight portions located between the adjacent protruding portions. A maximum distance from a vertex of the protruding portion to a plane where the first surface is located is h1, in the first direction, a thickness of the straight portion on the positive electrode plate is h, and 5%≤h1 / h≤30%. A weight percentage content of a silicon element in a negative electrode active layer of the negative electrode plate is W1, and 0.3≤W1 / (h1 / h)≤5.

An electrochemical cell (100) comprises a cylindrical can (122) with a closed end (122a) and an open end (122b). Inside the can (122), a jelly roll (114) is positioned, comprising a positive electrode, a negative electrode, and a separator wound together. The bottom lid (116) is placed at the open end (122b) of the can (122), and an upper terminal (102) is located at the closed end (122a). The bottom lid (116) has a stepped edge portion (124) that exerts an upward force on the jelly roll (114), pushing it towards the upper terminal (102). This configuration enhances the secure electrical contact between the jelly roll (114) and the upper terminal (102), ensuring stable performance by maintaining component alignment within the cylindrical can (122) (See FIGs. 3 and 4).

A battery cell (100), a battery (1000), and an electric device (2000). The battery cell (100) comprises: a jelly roll (10), which comprises electrode sheets and separators (13) which are wound, wherein the jelly roll (10) has a winding gap (103) and comprises a straight portion (101) and bent portions (102) connected to the end portions of the straight portion (101), the electrode sheets include a first electrode sheet (11), the first electrode sheet (11) is provided with a first straight section (111) and a second straight section (112) which are located at the straight portion (101), and the first straight section (111) and the second straight section (112) are located on two opposite sides of the winding gap (103); and a buffer pad (20), which is arranged in the winding gap (103), wherein at least part of the buffer pad (20) is located between the first straight segment (111) and the second straight segment (112).

A battery includes a cylindrical shell defining an inner volume and a jelly roll disposed within the inner volume. The jelly roll includes an anode comprising lithium configured as a freestanding assembly having first and second sides, a double-sided cathode having a cathode current collector sandwiched between sulfur-containing first and second cathode layers, a first separator between the anode first side and cathode first layer, and a second separator in direct contact with the anode second side and cathode second layer. The double-sided cathode comprises particles each including a first zone of first pores and a second zone of second pores. The battery provides a lithium-sulfur cylindrical cell configuration with a freestanding lithium anode and double-sided sulfur cathode structure.

The present application can provide an electrode assembly and a radioisotope battery comprising same, the electrode assembly being wound in one direction around a central axis to form a jelly roll in a state in which a first electrode, a second electrode, an energy conversion layer positioned between the first electrode and the second electrode, and a radioactive source provided between the first electrode and the energy conversion layer and / or between the second electrode and the energy conversion layer are stacked.

The disclosure relates to a battery cell. More specifically, the disclosure relates to a battery cell minimizing a connection space between a non-coating portion forming an electrode assembly and a current collector. The battery cell according to the disclosure can maximize the use efficiency of an internal space by minimizing a connection space between a non-coating portion of a jelly roll-shaped electrode assembly and a current collector. The battery cell according to the disclosure can increase a capacity by reducing a space loss inside a case accommodating an electrode assembly. The battery cell according to the disclosure arranges a welding face of a current collector perpendicular to a winding axis direction of an electrode assembly, and thus can reduce damage to the electrode assembly when the battery cell is crushed and can improve safety.

A floating support insert that is not tied to an electrode and electrically "floats" in between the anode and cathode potentials is utilized to support the inner diameter (i.e., "ID") of an electrode assembly (e.g., jelly roll (i.e., "JR")) and / or a cylindrical energy storage device. A floating support insert may be positioned within a cylindrical void of the electrode assembly, further include a conductive support material and be electrically insulated from each of the anode and the cathode.

An electrode assembly, a cylindrical lithium-sulfur battery cell including the same, and a battery pack and a vehicle including the cylindrical lithium-sulfur battery cell are provided. The electrode assembly is a jelly roll type electrode assembly having a structure in which a positive electrode plate, a negative electrode plate, and a separator therebetween are wound in one direction and having a center hole formed therein, and includes a center pin that is inserted in the center hole to press the electrode assembly.