88 results about "Jelly roll" patented technology

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.

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.

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.

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 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.

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 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.

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.

The present invention relates to a jelly roll-type electrode assembly, a manufacturing method therefor, and a secondary battery comprising same.

An electrode assembly includes: a first electrode; a second electrode on the first electrode in a first direction; and a separator between the first electrode and the second electrode. The first electrode, the second electrode, and the separator are wound in a jelly roll shape about a winding axis extending in a second direction intersecting the first direction. The first electrode has a first front uncoated region adjacent to the winding axis in the first direction and extending around the winding axis by at least two turns.

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 winding rod for an electrode assembly to wind a jelly roll-type electrode assembly, which has a structure in which a positive electrode, a negative electrode, and a separator interposed therebetween are wound in one direction and has a central hole formed at the center, may include: a first winding member inserted into the central hole of the electrode assembly; and a second winding member inserted into the central hole of the electrode assembly such that the separator is interposed between the first winding member and the second winding member, and configured to wind the electrode assembly together with the first winding member, and an asymmetry prevention portion may be formed on at least one of the first winding member and the second winding member to prevent asymmetry of the electrode assembly.

A lithium battery, comprises: a casing (101), a jelly roll (102), a circuit board (103), a protective cover (104) and a positive electrode body (105), wherein the circuit board (103) has a component side (1031) and a polarity side (1032) that are arranged opposite each other; the casing (101) has an accommodating cavity (1011); the jelly roll (102) is disposed in the accommodating cavity (1011); the circuit board (103) is disposed at an opening of the accommodating cavity (1011), with the component side (1031) facing the jelly roll (102); the protective cover (104) is disposed on the component side (1031); and the positive electrode body (105) is disposed on the polarity side (1032). Electronic components are concentrated on the component side (1031) of the circuit board (103), the component side (1031) faces the jelly roll (102), and the protective cover (104) protects the component side (1031) and prevents electrolyte infiltration and damage to the electronic components; a positive terminal of the jelly roll (102) is connected to the circuit board (103) by means of the protective cover (104), and is then led out by the positive electrode body (105), which functions as a positive electrode, and the casing (101) is connected to a negative terminal of the jelly roll (102) to serve as a negative electrode; and the component side (1031) of the circuit board (103) is arranged facing inward, so that the space inside the accommodating cavity (1011) can be fully utilized, thereby solving the problem of the volume being large due to conventional electronic components facing outward, and reducing the volume of the lithium battery so as to meet the requirements of current products.

The present application relates to the technical field of batteries, and discloses a secondary battery and a battery pack. The secondary battery comprises a casing, a top cover assembly, a jelly roll, and a cooling assembly. The casing is provided with an accommodating cavity. The accommodating cavity forms a first opening in the casing. The top cover assembly comprises a top cover sheet, and the top cover sheet is connected to the casing and seals the first opening. The jelly roll is provided in the accommodating cavity. The cooling assembly comprises a liquid cooling plate and a flow guide member, wherein the liquid cooling plate is provided in the accommodating cavity and is fit with the jelly roll, the liquid cooling plate is provided with a flow channel, the flow guide member passes through the top cover sheet, and the liquid cooling plate is located on the side of the flow guide member close to the jelly roll. The flow guide member is electrically connected to the top cover sheet, the flow guide member is electrically connected to the liquid cooling plate, the flow guide member is communicated with the flow channel, and the flow guide member is used for connecting to a thermal management component. In the present application, the flow guide member is configured so that a heat exchange medium in the liquid cooling plate can flow to the outside of the secondary battery for heat exchange, and in addition, the flow guide member electrically connected to the top cover sheet can also enable the liquid cooling plate to maintain a high potential, thereby preventing electrochemical corrosion of the liquid cooling plate.

An insulation taping device for a secondary battery includes a jelly roll case, into which a jelly roll with a tape attached to a top surface of the jelly roll is to be introduced, an insertion jig including a through-hole and positioned above the jelly roll case, the insertion jig being configured to be coupled to a bottom end of a can, and the through-hole being configured to be coupled to a top end of the jelly roll case to guide the jelly roll, and a driver configured to drive the jelly roll case into the insertion jig, the tape on the top surface of the jelly roll contacting the insertion jig and adhering to a side surface of the jelly roll as the jelly roll is inserted into the can in the insertion jig.

A dust removal device for an electrode sheet, and a battery processing apparatus. The dust removal device for an electrode sheet comprises a housing (100), a suction assembly (400), a first blowing assembly (200) and a second blowing assembly (300). The housing (100) has an inner cavity (150), and in a first direction, two opposite sides of the housing (100) are both provided with through holes (110) for conveying an electrode sheet (10). In a second direction, two opposite sides of the housing (100) are both provided with suction ports (120), the suction assembly (400) being in communication with the suction ports (120). The first blowing assembly (200) and the second blowing assembly (300) are both disposed in the inner cavity (150), and a channel (140) for conveying the electrode sheet (10) is formed between the first blowing assembly (200) and the second blowing assembly (300), the channel (140) being in communication with the through holes (110). The first blowing assembly (200) and the second blowing assembly (300) are both arranged in a third direction, and the first blowing assembly (200) and the second blowing assembly (300) are both configured to blow dust on the electrode sheet (10). The suction assembly (400) is configured to suction the dust that has been blown up. The device can prevent the risk of short circuits in a jelly roll caused by dust and other metallic debris entering the jelly roll, thereby improving safety, reducing potential safety hazards, and saving on costs.

Embodiments relate to a jelly roll winding unit (1) and winding method for a secondary battery and, more particularly, to a jelly roll winding unit (1) and winding method for a secondary battery seeking to prevent sagging in the width direction by constantly supporting the bottom of a jelly roll (J) during the work of wrapping the jelly roll (J) with a separator (B) and easily guides the folding line of the separator (B) as needed.

An electrode assembly according to one embodiment of the present invention includes a first electrode, a second electrode, and a separator interposed between the first and second electrodes. The first electrode, the second electrode, and the separator are wound together to form a jelly roll structure. The first electrode includes a first electrode collector and a first active material portion formed by coating one or both surfaces of the first electrode collector with an electrode active material. The second electrode includes a second electrode collector and a second active material portion formed by coating one or both surfaces of the second electrode collector with an electrode active material. A first exposed portion of the first electrode collector, which is not coated with the electrode active material, extends in a first direction, and a second exposed portion of the second electrode collector, which is not coated with the electrode active material, extends in a second direction opposite to the first direction. The first exposed portion and the second exposed portion have bending points at each winding turn. The length from the end of the first electrode current collector in the second direction to the bending point of the first exposed portion gradually increases with each turn of winding along the radial direction of the jelly roll structure, which is the direction from the core portion to the outer portion of the jelly roll structure.

A battery cell production apparatus, a battery cell produced using same, and a battery pack and a vehicle comprising the battery cell are disclosed. The battery cell production apparatus. according to one embodiment of the present invention, which produces a battery cell by using an electrode foil on which a coating layer is formed, comprises: an electrode generation member for generating an electrode foil; a winding member for winding, in the form of a jelly roll, an electrode generated using the electrode generation member; and a folding member for folding the electrode.

The present invention relates to a cylindrical secondary battery and a manufacturing method thereof. In a cylindrical secondary battery manufactured using an electrode assembly, when a horizontal cross section of a jelly-roll type electrode assembly is divided into a plurality of quadrants, a positive electrode tab and a negative electrode tab are arranged in the same quadrant, whereby the jelly-roll type electrode assembly is controlled to have a uniform diameter, thereby preventing deformation of the positive electrode tab and uneven volume expansion inside the secondary battery due to charging and discharging, to maintain structural stability.

Methods and systems for a perforated jellyroll battery are provided. In one example, the perforated jellyroll battery can include a perforated anode including an anode active material layer, an anode current collector, and an anode perforation, a perforated cathode including a cathode active material layer, a cathode current collector, and a cathode perforation, and a separator positioned between the perforated anode and the perforated cathode. The anode perforation and the cathode perforation are axially and radially aligned with respect to the jellyroll battery.

A case-neutral electrochemical cell comprises a jellyroll electrode assembly housed inside a cylindrically shaped casing. The anode has a tab connected to the perimeter of a metallic couple residing between a casing header and the electrode assembly. Separately, an anode lead is connected to the couple. This establishes continuity from the anode tab connected to the couple in turn connected to the anode lead extending from the couple and then in a non-conductive relationship through the header to serve as the negative terminal for the cell. A cathode lead, which had previously served as a winding mandrel for the electrode assembly, extends in a non-conductive relationship through both the couple and a second opening in the header. That way, the anode and cathode leads are both electrically isolated from the casing comprising the header closing an open-ended container housing the electrode assembly to provide the case-neutral cell design.

A jelly roll type electrode assembly includes a first electrode, a second electrode, an energy conversion layer positioned between the first electrode and the second electrode, and a radioactive source positioned either between the first electrode and the energy conversion layer or between the second electrode and the energy conversion layer. The layers of the electrode assembly are stacked and collectively wound around a central axis to define a jelly roll configuration. The electrode assembly may include an insulating layer positioned along a surface of at least one of the first electrode and the second electrode that faces away from the radioactive source. The radioactive source may include a radioisotope that emits alpha or beta particle radiation, and the energy conversion layer may include semiconductor materials defining a P-N junction for absorbing such radiation. A radioisotope battery including the electrode assembly may also be provided.

A cylindrical battery having a wound jelly roll configuration that includes an anode current collector having a first surface and an opposing second surface; at least one anode disposed on the first surface of the anode current collector; at least one Li metal film disposed on the first surface anode current collector, wherein the at least one Li metal film is spaced apart from the anode; a cathode current collector having a first surface and an opposing second surface; at least one cathode disposed on the first surface of the cathode current collector; and a first membrane separator positioned between the anode and the cathode.