944results about "Cylindrical casing cells/battery" patented technology

Example embodiments include electrode assemblies and all-solid-state batteries. The electrode assembly includes a first solid electrolyte layer, a positive electrode layer, a second solid electrolyte layer, and a negative electrode layer that are disposed along a radial direction of the electrode assembly. The positive electrode layer includes a positive electrode current collector, a first positive electrode active material layer on a first surface of the positive electrode current collector and in contact with the first solid electrolyte layer. A first width of the first positive electrode active material layer is less than a second width of the first solid electrolyte layer, a first buffer structure adjacent to a first side of the first positive electrode active material layer, and a second buffer structure adjacent to a second side of the first positive electrode active material layer.

The invention discloses a cylindrical battery and a battery pack. The cylindrical battery comprises: a housing having an opening formed at one end in the axial direction thereof; the electrode assembly is arranged in the shell; the cover plate is installed on the opening in a sealed mode, and the cover plate comprises a first weak structure; the switching piece is arranged between the electrode assembly and the cover plate, the switching piece comprises a first switching part and a second switching part, the first switching part is electrically connected with a tab of the electrode assembly, and the second switching part is fixed and electrically connected with the shell; a second weak structure is arranged on the first adapter part; the calculation formula of the radius R of the second weak structure is shown in the specification. The final position of the second weak structure is determined through a calculation formula, at least part of the second weak structure does not fall into the area where the pressure relief part is located after deformation, then the second weak structure is supported by the edge of the fixing part so as to be prone to deformation, and therefore the beneficial technical effects of improving safe pressure relief and discharging efficiency and stability of the anti-explosion valve are achieved.

An energy storage device, such as a lithium-ion battery, without tabs connecting the electrode jelly roll to the can, and a method for making the same, is described. A series of flags may be cut, bent, and interleaved with one another to form connection points for upper and lower collector plates within the can. The upper and lower collector plates can be welded directly to the interleaved flags to form connection points for the anode and cathode in the energy storage device.

The present application provides a cylindrical cell, a battery device, and an electric device. The cylindrical cell comprises a casing and an electrode assembly; the electrode assembly is accommodated in the casing, and comprises a first electrode sheet and a second electrode sheet which have opposite polarities; and the first electrode sheet and the second electrode sheet are wound in a winding direction. The first electrode sheet comprises an electrode sheet body and a reinforcing coating; the electrode sheet body has a first area and a second area which are arranged adjacent to each other in the winding direction; the first area extends from a winding starting end of the electrode sheet body, and is provided with the reinforcing coating; and no reinforcing coating is provided in the second area. In the embodiments of the present application, the risk of deformation collapse of the first electrode sheet at a position near a central hole can be reduced without additionally adding other components to the interior of the cylindrical cell, thereby improving the use reliability of the cylindrical cell.

A columnar secondary battery includes an electrode assembly. The electrode assembly includes a negative electrode plate. The negative electrode plate includes a negative current collector. A surface of the negative current collector facing away from a winding center of the electrode assembly is coated with a first negative electrode material layer. Along a length direction of the negative electrode plate unwound and along a winding direction of the electrode assembly, the first negative electrode material layer includes a first section and a second section connected sequentially. Based on a length of the first negative electrode material layer, a length of the first section accounts for 9% to 75%, and a length of the second section accounts for 25% to 91%. A plurality of first stripes are provided on the first section, and a plurality of second stripes are provided on the second section.

The embodiment of the invention provides an electrode assembly and a manufacturing method and equipment thereof, a battery and a power utilization device, the electrode assembly is used for a battery monomer (100) and comprises a first pole piece (1) and a second pole piece (2) which are opposite in polarity, and each of the first pole piece (1) and the second pole piece (2) comprises a main body part (11) and a tab (12) protruding out of the main body part (11), the first pole piece (1) and the second pole piece (2) are wound around a winding axis (K), so that respective main body parts (11) form a winding main body (S); the end part of the winding main body (S) comprises at least one conductive region (121) and at least one liquid guide region (111), the tab (12) is led out from the conductive region (121), is wound for at least one circle and is used for being electrically connected with a terminal (1022) of a battery monomer (100), and the liquid guide region (111) and the conductive region (121) are arranged adjacently along the radial direction of the winding main body (S) and are used for guiding electrolyte to flow into the winding main body (S).

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.

The invention discloses a battery monomer, electric equipment and winding equipment, and belongs to the technical field of batteries, the battery monomer comprises an electrode assembly, the electrode assembly comprises a first pole piece, a second pole piece, a separator and a supporting piece, the first pole piece, the second pole piece and the separator are all wound on the periphery of the supporting piece, the supporting piece comprises a supporting main body and an insert, and the insert is inserted into the supporting main body. The supporting body is provided with an inner cavity, and a notch is formed in one side of the supporting body and extends from the first end of the supporting body to the second end of the supporting body. The insert is connected with the supporting body and extends into the notch, the inner cavity is used for containing the winding needle, the winding needle is used for driving the supporting body to rotate synchronously, and the supporting body and the insert are used for clamping the isolation piece. The separator is rolled in a mode of applying friction force to the separator through the supporting main body and the insert, and pre-rolling of the separator is completed without depending on hot ironing and gluing modes. The problem that the separator is wrinkled or the pole piece is wrinkled due to hot ironing and gluing modes is solved, and the structural stability of the electrode assembly is improved.

The application provides a button cell structure, a manufacturing method thereof and a button cell, wherein the button cell structure comprises a winding core formed by winding a laminated structure and having a hollow inner hole, the laminated structure comprises at least one positive electrode sheet, at least one negative electrode sheet and a separator separating the at least one positive electrode sheet and the at least one negative electrode sheet, and at least two ends of the winding core are provided with a separator bonding layer wrapping the winding core, which is used for fixing the positive electrode sheet and the negative electrode sheet. The application provides a button cell structure, a manufacturing method thereof and a button cell, which at least solve the technical problem that the positive electrode sheet and the negative electrode sheet are prone to shifting, avoid short circuit caused by the contact between the positive electrode sheet and the negative electrode sheet and the shell in the button cell, and improve the use safety of the button cell.

The invention provides a positive electrode active material, a preparation method thereof, a positive electrode plate containing the positive electrode active material, a full-tab battery cell and an electric device, and relates to the technical field of lithium ion batteries. The positive electrode active material is of a double-spherical particle structure with a glass-phase neck bridge at a contact neck part, each spherical particle comprises an active material body and a coating layer coating the active material body, and the active material body is lithium iron phosphate dispersed with Fe2P; the average thickness tsh of the coating shell layer is equal to 5 to 9 nm; the thickness tcheck of the glass phase neck bridge is 5-25nm, and the total content G of the glass phase in the positive electrode active material is 1.5-2.2 wt%; the volume average particle size of the positive electrode active material is 7-9 [mu] m. According to the positive electrode active material disclosed by the invention, through the cooperation of the coating shell layer, the embedded Fe2P nano second phase and the glass phase neck bridge, the comprehensive performance of a full-tab battery cell and an electric device can be effectively improved.

Discussed is a battery that may include an electrode assembly including a first electrode, a second electrode and a separator wound around a winding axis, wherein the first electrode includes a first active material region coated with a first active material layer and a first uncoated region not coated with the first active material layer, and at least a part of the first uncoated region being an electrode tab; a first current collector coupled to at least a part of the first uncoated region on the electrode assembly; a battery housing to accommodate the electrode assembly and the first current collector; and an insulator interposed between at least one of the first uncoated region and the first current collector and an inner surface of the battery housing facing the at least one of the first uncoated region and the first current collector to block an electrical connection between the battery housing and the at least one of the first uncoated region and the first current collector.

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

A deformation analysis device and a non-destructive analysis method for a secondary battery are capable of accurately diagnosing electrode deformation of the secondary battery using a computed tomography (CT) image. The deformation analysis method for the secondary battery includes performing computed tomography (CT) scanning on each of a first area and a second area of the secondary battery to acquire a first image corresponding to the first area and a second image corresponding to the second area, measuring a first angle from a winding front end to a winding distal end of an electrode of an electrode assembly in the first image and measuring a second angle from the winding front end to the winding distal end of the electrode of the electrode assembly in the second image, and determining that the electrode assembly is deformed if a difference value between the first angle and the second angle is greater than a reference value.

The present invention relates to an electrode assembly, which is made by winding a positive electrode, a separator, and a negative electrode, in which the negative electrode includes a negative electrode active material portion made by applying a negative electrode active material onto a negative electrode current collector, a central negative electrode non-coated portion positioned at a winding center portion and having no negative electrode active material, and a negative electrode non-coated portion including an outermost peripheral negative electrode non-coated portion positioned at an outermost winding periphery, in which a variable unit is provided on the outermost peripheral negative electrode non-coated portion and configured to adjust a length or width thereof, and in which the variable unit includes one or more cutout portions having a non-straight shape, and a variable portion configured to adjust a length or width thereof.

The application relates to the technical field of batteries, and discloses a cylindrical battery and a preparation method of the cylindrical battery. The cylindrical battery comprises a first cylindrical battery cell and a second cylindrical battery cell. The first cylindrical battery cell comprises a first battery cell main body, a first tab and a second tab. The first tab and the second tab with opposite polarities extend from opposite ends of the first battery cell main body along a first direction and a second direction respectively. The first battery cell main body comprises a first center hole. The second cylindrical battery cell comprises a second battery cell main body, a third tab and a fourth tab. The third tab and the fourth tab with opposite polarities extend from opposite ends of the second battery cell main body along the first direction and the second direction respectively. The second battery cell main body comprises a second center hole, and the second cylindrical battery cell is arranged in the first center hole. The first tab and the third tab with opposite polarities are connected, so that the first cylindrical battery cell and the second cylindrical battery cell are connected in series, and the voltage of the cylindrical battery is improved.

A battery cell and a manufacturing method therefor, a battery device, and an electric device. The battery cell comprises an electrode sheet and a separator; the electrode sheet comprises a current collector and an electrode film layer located on at least one side of the current collector; the separator comprises a base film and a coating layer located on at least one side of the base film; and the electrode film layer and / or the coating layer comprises a gel region and a non-gel region, and the gel region comprises a gel electrolyte. The battery cell has improved cycle performance.

The present invention may provide an electrode assembly in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode are wound, in which at least one of the positive electrode and the negative electrode includes an uncoated portion at a long-side end, and a winding turn portion of the uncoated portion is provided at a one-side end of the electrode assembly, and the winding turn portion includes a bending region including a plurality of uncoated portion layers configured to be bent by pressure to form a curved surface.

Examples of the disclosure include a negative electrode for a rechargeable lithium battery and a rechargeable lithium battery. The negative electrode includes a current collector, and a negative electrode active material layer on the current collector. The negative electrode active material layer includes a I region, a II region and a III region which are separated by boundaries extending along a longitudinal direction. The II region includes a first crystalline carbon negative electrode active material, the I region and the III region include a second crystalline carbon negative electrode active material, and a tap density of the first crystalline carbon negative electrode active material is lower than a tap density of the second crystalline carbon negative electrode active material.

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.

To provide an electric cell with a stable structure which can significantly improve the stability of a battery.SOLUTION: The electric cell is a winding body formed by winding a laminate body including a positive electrode sheet 160, a negative electrode sheet 120, a separator 140, positive electrode tabs 170a and 170b, and negative electrode tabs 130a, 130b, and 130c. A negative electrode coating 122 is not formed for a predetermined length from a winding start end A1 in the surface of the negative electrode sheet. The ratio of the predetermined length to the length of the negative electrode sheet is in the range from 0.015 to 0.100.SELECTED DRAWING: Figure 1

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

The present invention provides a secondary battery which suppresses deterioration of battery characteristics. A laminated electrode body (20) and an electrolyte solution (15) are housed in a case main body (12). The positive electrode plate (22) and the negative electrode plate (24) are laminated, and the separator (26) is sandwiched between the positive electrode plate (22) and the negative electrode plate (24) and folded back. The positive electrode plates (22) and the negative electrode plates (24) face the opposing side surfaces (12b) inside the cylindrical case main body (12), and the positive electrode plates (22) and the negative electrode plates (24) are alternately arranged. A first end portion (26e1) and a second end portion (26e2) are formed on the lower portion of the laminated electrode body (20). The position of the upper edge (26eU) of the second end portion (26e2) is disposed below the liquid surface (15a) of the electrolyte (15).

Cylindrical battery cell (70), comprising: an electrode arrangement (71) comprising a first electrode plate, a second electrode plate and a separator arranged between them, wherein the electrode arrangement (71) is wound such that it has a first end face and a second end face (52) opposite each other, wherein the first electrode plate has an uncoated section arranged at the first end face of the electrode arrangement (71) and the second electrode plate has an uncoated section arranged at the second end face (52) of the electrode arrangement (71), wherein the uncoated sections extend beyond the separator; a battery box (51) which accommodates the electrode arrangement (71) and is electrically connected to the first electrode plate, wherein the battery box (51) has a first end face and a second end face (52) which are opposite each other, wherein the first end face is open; an electrode connection (50, 50') which passes through a perforated opening (53) formed in the second end face (52) of the battery box (51); and a sealing body (74) that closes the first end face of the battery box (51); a seal (54) which is arranged between the electrode connection (50, 50') and the perforation opening (53), where the electrode connection has (50, 50'): - a body segment (50a) that passes through the perforation opening (53); - an outer flange section (50b) extending from the body section (50a) along an outer surface (52a) of the second end surface (52) of the battery box (51); - an inner flange section (50c) arranged inside the battery box (51) and extending outwards from the body section (50a); and - a flat section (50d) arranged in the battery box (51) and surrounded by the inner flange section (50c), wherein a recess is formed between the inner flange section (50c) and the flat section (50d); wherein the seal (54) has: an outer seal (54a) arranged between the outer flange section (50b) and the outer surface (52a) of the second end surface (52) of the battery box (51); and an inner seal (54b) arranged between the inner flange section (50c) and the inner surface (52b) of the second end surface (52) of the battery box (51), wherein at least one section (54a') of the outer seal (54a) is exposed to the outside of the outer flange section (50b) of the electrode connection (50), wherein the exposure width (G) of the outer seal (54a), measured in a direction parallel to the outer surface of the second end surface (52) of the battery box (51), is 0.1 mm to 1 mm.

The conformal battery pack assembly includes an array of electrically connected individual electrochemical cells surrounded and encapsulated by a flexible outer shell, and the array is geometrically arranged such that there are at least three non-parallel bending axes.

The energy storage battery (100) includes a ribbon-shaped electrode and separator assembly (104) in the form of a cylindrical winding having two terminal end faces (104b, 104c) and a winding shell (104a) disposed therebetween. The electrodes have current collectors (115, 125), respectively, and are offset from one another within the assembly so that the longitudinal edge of the negative electrode protrudes from one of the end faces (104b, 104c) and the longitudinal edge of the positive electrode protrudes from the other end face. The assembly (104) is axially aligned within a housing including a metal tubular housing portion (101) having a terminal circular opening (101c) such that the winding shell (104a) abuts the interior (101b) of the tubular housing portion (101). In a preferred embodiment, the winding shell is formed by a separator or a separate plastic band and is therefore insulated from the housing portion (101). The battery (100) includes a contact element (110) that is in direct contact with one of the longitudinal edges (115a, 125a) protruding from the end face for electrical contact of one of the electrodes and is connected to this longitudinal edge, preferably by welding. It is proposed to use a contact element (110) with a circular edge and to use the contact element (110) to close the terminal circular opening (101c) of the tubular housing part (101).

The nonaqueous electrolyte secondary battery according to the present application includes a storage container having a positive electrode can, a gasket, and a negative electrode can, and a power generating element containing an electrolyte. The positive electrode can is formed in a bottomed cylindrical shape having a bottom wall portion and an outer wall portion. The negative electrode can is formed in a toped cylindrical shape having a top wall portion and an inner wall portion. A portion of the outer wall portion on the top wall portion side is a calked portion 12b that is curved toward the inner wall portion side with a curvature radius R from the bottom wall portion side to an opening end edge of the outer wall portion. The nonaqueous electrolyte secondary battery has a diameter of 4.6 mm to 5.0 mm. A height H2 of the positive electrode can is in a range of 74% to 79% relative to a height H1 of the nonaqueous electrolyte secondary battery. The curvature radius R of the calked portion is in a range of 0.7 mm to 1.1 mm.

The invention relates to a battery cell tab rubbing control method, device and equipment. The method comprises the following steps: rotating a turntable for bearing a battery cell to a detection station; respectively acquiring side line positions of tabs on two sides of the battery cell at the detection station; calculating two deviation values based on the sideline positions of the tabs on the two sides of the battery cell and respective corresponding preset standard positions; the rotary table rotates to a kneading station; at the rubbing station, based on the two deviation values, target feeding positions used for driving rubbing mechanisms on the two sides of the battery cell are calculated respectively; and controlling the rubbing mechanisms on the two sides of the battery cell to move oppositely according to the respective target feeding positions so as to synchronously perform rubbing operation on the tabs on the two sides of the battery cell. According to the scheme provided by the invention, the problems of virtual pressing and over-position caused by battery cell incoming materials or positioning deviation in the clamp can be solved, and the safety and reliability of the battery are remarkably improved.

A sealing assembly for a battery cell includes a grommet having an opening with an inner surface. A peg has a peg head and a shaft extending from the peg head. The shaft includes a first portion having a larger diameter and a second portion having a smaller diameter, and the shaft extends through the opening in the grommet. The shaft and the grommet form a first interference fit at a distal end of the opening. A trap gap is formed between the distal end of the opening and the peg head. The trap gap defines a trap for a sealant. A sealant is disposed on the shaft and at least partially in the trap.

A battery includes: an electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode and wound together; a case to accommodate the electrode assembly, and including a bottom portion, a sidewall portion connected to the bottom portion, and an opening at a side opposite to the bottom portion; and a cap assembly to seal the opening by being connected to one end of the sidewall portion of the case. A substrate of the second electrode extends and is wound to surround an outer circumference of the electrode assembly, and at least a portion of the outer circumference of the electrode assembly contacts the sidewall portion of the case.

A negative electrode for nonaqueous electrolyte secondary batteries is provided with: a negative electrode current collector; a first negative electrode mix layer arranged on a surface of the negative electrode current collector; and a second negative electrode mix layer arranged on a surface of the first negative electrode mix layer. The first negative electrode mix layer contains a first carbon material having a true density of 2.1 g / cm3 to 2.3 g / cm3, the second negative electrode mix layer contains a second carbon material having a true density of 1.5 g / cm3 to 2.0 g / cm3, the inter-particle porosity of the second carbon material in the second negative electrode mix layer is larger than that of the first carbon material in the first negative electrode mix layer, and the ratio of the mass of the first negative electrode mix layer to that of the second negative electrode mix layer is 95:5 to 80:20.