1726results about "Cylindrical casing cells/battery" patented technology

A cylindrical secondary battery including an electrode assembly including a negative electrode plate and a positive electrode plate; a cylindrical can accommodating the electrode assembly and including a terminal hole in one side of the cylindrical can and an open inlet in another side of the cylindrical can; a terminal coupled to the cylindrical can through the terminal hole; and a negative electrode current collector in the cylindrical can and electrically connecting the cylindrical can to the negative electrode plate. The negative electrode current collector includes a notch groove or a cutting hole configured to be cut in response to an increase in pressure in the cylindrical can.

A secondary battery includes: an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a can accommodating the electrode assembly, a lower end of the can being open and being electrical connected to the second electrode plate; a first current collector plate between a top surface of the electrode assembly and the can and electrically connected to the first electrode plate; and a terminal part passing through a top surface of the can, a lower end of the terminal part being electrically and mechanically coupled to a top surface of the first current collector plate. A terminal liquid injection hole, through which an electrolyte is injected, extends through the terminal part.

A cylindrical secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case accommodating the electrode assembly and having a lower end that is open and electrically coupled to the second electrode plate; a first current collector plate between a top surface of the electrode assembly and the case and that is electrically connected to the first electrode plate; a terminal passing through a top surface of the case and including a lower end electrically and mechanically coupled to a top surface of the first current collector plate; and a cap plate configured to seal the lower end of the case. The terminal includes a lower terminal including a welding groove having a depth from a top surface of the terminal in a downward direction; and an upper terminal in the welding groove of the lower terminal.

A non-aqueous electrolyte secondary battery comprises: an electrode body obtained by winding a negative electrode (12) in which a negative electrode mixture layer (32) is formed on a negative electrode core body (30) and a positive electrode, with a separator therebetween; and a non-aqueous electrolyte. The non-aqueous electrolyte secondary battery is characterized in that: the negative electrode (12) has, at the winding direction inner-end side of the electrode body, a non-facing part (12a) which does not face the positive electrode with the separator therebetween; the non-facing part (12a) has a mixture non-facing part (12c) in which the negative electrode mixture layer (32) is formed on at least one surface of the negative electrode core body (30), from the winding direction outer end of the non-facing part (12a) and toward the winding direction inner side; and the average value of a mixture surface distance which is between the mixture non-facing part (12c) and the negative electrode (12e) positioned one turn outward of the mixture non-facing part (12c) is not less than 90 µm.

The present application discloses a preparation method, apparatus, device and medium for a No. 5 lithium-ion battery. The method includes: preparing a battery cell; selecting a steel material and stamping it to obtain an upper steel shell of the battery; determining bending parameters of the spring sheet based on user requirements and attribute parameters of the spring sheet; assembling a PCB board and the upper steel shell based on the bending parameters, bending a negative spring sheet on a side of the PCB board downwards, and bending a positive spring sheet at a bottom of the PCB board downwards, thus obtaining a complete step-down charging terminal; fitting the complete step-down charging terminal onto the battery cell to obtain a semi-finished product; and fixing the semi-finished product by roller pressing, and covering an insulating film on an outside of the semi-finished product to obtain a finished product of the battery.

The invention discloses a tab protection interlayer, a full-tab battery cell and a cylindrical battery with a shell electrode, a non-adhesive area and an adhesive area are arranged on the tab protection interlayer, so that the non-adhesive area is attached to a tab but is not adhered to the tab, and the adhesive area is adhered to a small part of tab root area and is adhered to the end part of a roll core main body at the same time; the probability that the full tab is pulled by the adhesive tape to rebound is reduced to a great extent. When the full tab is kneaded, the interlayer can be pressed towards the center direction of the roll core to form a bending structure, so that the area of an extruded area of the interlayer is reduced, and the interlayer can be adhered to a small part of area of the root part of the tab and an adhesive area on the roll core main body by virtue of the bending structure, so that the roll sleeve and wrinkles are effectively prevented from being extruded by a shell. And the interlayer can also form an elastic sealing ring structure between the shell and the roll core main body, so that the electrolyte is prevented from leaking to the negative electrode end of the cylindrical battery with the positive electrode shell by combining the adhesion sealing effect of the adhesive glue of the interlayer, and the short circuit between the tab and the shell is avoided.

The invention discloses a cylindrical battery design method based on an Archimedes spiral formula, which comprises the following steps of: calculating the number of winding turns of a positive electrode, a negative electrode and two layers of diaphragms at one time through the Archimedes spiral formula; and establishing a relation curve of the number of winding turns, the winding radiuses and the winding curves xy of the four groups of assemblies on the battery simulation diagram, obtaining xy coordinate values of the corresponding winding curves of the four groups of assemblies, and completing the winding design of the cylindrical battery. After the positive electrode, the negative electrode and the diaphragm are wound, the diameter of the winding core is certainly and completely consistent with the preset diameter, and the situation that the winding core cannot enter a shell is avoided. Moreover, the method can directly simulate the cross section condition of the wound roll core in an excl table, can more visually judge the diameter of the wound roll core, the wrapping condition of a negative electrode to a positive electrode and other information, and provides great convenience for the design of the roll core.

The invention relates to the technical field of lithium ion batteries, in particular to a full-tab cylindrical lithium ion battery and a power utilization device, the full-tab cylindrical lithium ion battery comprises a winding type battery cell, and a positive plate, a diaphragm and a negative plate which are laminated according to a specific mode; the positive plate comprises a positive current collector as well as a positive slurry coating area and a positive empty foil area which are positioned on at least one surface of the positive current collector; the negative plate comprises a negative current collector as well as a negative slurry coating area and a negative empty foil area which are positioned on at least one surface of the negative current collector; after winding, the positive empty foil area and the negative empty foil area respectively form a positive tab and a negative tab through a kneading, cutting and stacking or ultrasonic process; when the battery discharges at 10C, the slope of a curve relation formed by data fitting of the temperature rise coefficient and the discharge current is 0.2-1, the temperature rise performance of the full-tab battery cell is obviously superior to that of a traditional tab battery, more electric quantity can be discharged in a lower temperature interval, and the full-tab battery cell has relatively good safety and relatively high energy density.

The present disclosure provides a battery cell, a battery, and an electric apparatus. The battery cell comprises an electrode assembly and an electrolyte, wherein the electrode assembly comprises a negative electrode sheet; the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer located on at least one side of the negative electrode current collector; the negative electrode film layer comprises a negative electrode active material; the negative electrode active material comprises a silicon-carbon composite material, and the silicon-carbon composite material comprises a carbon material matrix having a pore structure and a silicon-based material located in the pore structure of the carbon material matrix; and a ratio of the mass of the electrolyte to the capacity of the battery cell is 1.2 g / Ah-2.0 g / Ah. The battery of the present disclosure can achieve both high energy density and excellent cycle performance.

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.

The invention provides a manufacturing method of a cylindrical battery and a winding device of a roll core, the cylindrical battery comprises a shell and the roll core, the manufacturing process of the roll core comprises the following steps: a positive plate, a negative plate and a diaphragm are wound to obtain a first core roll, and the diameter of the first core roll is smaller than the designed diameter of the roll core; obtaining a difference value between the diameter of the first core roll and the designed diameter of the roll core; and if the difference value is larger than the preset threshold value, a coating layer with the adjustable thickness is arranged on the periphery of the first core roll to form the second core roll, the difference value between the diameter of the second core roll and the designed diameter is made to be within the design tolerance range, and the technical problem that the roll core consistency is poor can be solved.

The invention belongs to the technical field of battery processing, and discloses a roll core and a full-tab cylindrical battery. The roll core is formed by winding a positive plate, a diaphragm, a negative plate and a diaphragm which are stacked in sequence, a through hole is formed in the center of the roll core, a positive electrode active material and a first blank foil located at the axial end part of the roll core are arranged on a positive electrode foil of the positive plate, and at least the first blank foil is bent towards the center of the roll core and is overlapped to form a flat surface; the roll core further comprises a first insulating coating, at least the outer side of the positive plate is coated with the first insulating coating, the starting end of the first insulating coating is flush with the starting end of the first blank foil, the distance between the top of the first blank foil and the top of the negative plate is L, and the distance between the upper boundary of the first insulating coating and the top of the negative plate is L1, the inward bending width of the first blank foil is defined as W, and L / 3 < = L1 < = L-W. The roll core and the full-tab cylindrical battery can effectively prevent the blank foil of the positive electrode from being bent outwards at the starting end to be in contact with the negative plate to cause short circuit, and the qualification rate of the roll core is improved.

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 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 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.

Disclosed is a secondary battery capable of improving sealing performance of a cell housing part including a case and a cap plate. The secondary battery includes an electrode assembly, including first and second electrode plates and a separator, a case accommodating the electrode assembly and electrically connected to the second electrode plate, a terminal mounted to the case configured to be electrically connected to the first electrode plate, a cap plate sealing an open top of the case, and a second gasket interposed between the case and the cap plate. The case includes a beading portion depressed inward and a crimping portion bent inward. A forming curvature calculated based on a bending amount of the crimping portion and a covering length of the crimping portion is different from a support strain calculated based on a depression depth of the beading portion and a cover overlapping length of the crimping portion.

The invention belongs to the technical field of battery processing, and discloses a roll core and a full-tab cylindrical battery. The roll core is formed by winding a positive plate, a diaphragm, a negative plate and a diaphragm which are stacked in sequence, a through hole is formed in the center of the roll core, a coating layer and a first blank foil located at the axial end part of the roll core are arranged on a positive foil of the positive plate, and at least the first blank foil is bent towards the center of the roll core and is overlapped to form a flat surface; the roll core further comprises an insulating tape, the insulating tape is attached to at least the outer side of the positive plate, the starting end of the insulating tape is flush with or close to the front of the starting end of the positive plate, the distance between the top of the first blank foil and the top of the negative plate is L, the distance between the upper boundary of the insulating tape and the top of the negative plate is L1, the inward bending width of the first blank foil is defined as W, and L / 3 < = L1 < = L-W. The blank foil of the positive electrode can be effectively prevented from being bent outwards at the starting end and making contact with the negative plate to cause short circuit, and the qualified rate of the roll core is increased.

The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion full-tab cylindrical secondary battery and electric equipment. The battery cell is formed by winding a positive plate, a diaphragm and a negative plate; the two wide edges of the negative plate are named as a negative winding starting end and a negative winding ending end respectively, a certain length is cut off from the edges of the two long edges of the negative empty foil area, and the two wide edges of the remaining length of the negative empty foil area are named as a first starting end and a first ending end respectively; the length between the first starting end and the cathode winding starting end is a1, the distance between the first ending end and the cathode winding ending end is b1, the height of the cathode empty foil area is h0, and the following relations are satisfied: 17 < = a1 / h0 < = 55 and 5 < = b1 / h0 < = 25. Under the same discharge current, compared with a traditional battery, the temperature rise coefficient of the battery is relatively low, the problem of too fast temperature rise in the battery using process can be effectively controlled, the safety of the lithium ion battery is improved, and the cycle life of the lithium ion battery is prolonged.

The present disclosure relates to a battery cell comprising: an electrode assembly including a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode; a case having a first opening at one end and forming a space in which the electrode assembly is accommodated through the first opening; and a cap assembly coupled with the case to form the space together with the case and closing the first opening.

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 cylindrical secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case accommodating the electrode assembly and electrically connected to the second electrode plate; a terminal electrically connected to the first electrode plate and coupled to the case via a first gasket; a cap plate configured to seal an upper end portion of the case, a second gasket between the case and the cap plate; a first current collector between a lower surface of the electrode assembly and the terminal; and a second current collector between an upper surface of the electrode assembly and the cap plate and at one side of an edge region thereof between the case and the second gasket. An electrically conductive connection induction portion is on at least one of the cap plate or the second current collector.

The present invention discloses a cylindrical battery, a battery pack including the cylindrical battery, and an automobile. The cylindrical battery includes an electrode assembly in which a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode are wound around a winding axis to define a core and an outer peripheral surface, and a cylindrical battery housing for housing the electrode assembly. When a first sector region surrounded by a first straight line passing through the core-side end portion of the first electrode from the center of the core, a second straight line passing through the core-side end portion of the second electrode from the center of the core, and the outer peripheral surface is defined as a stress vulnerable region, and a second sector region surrounded by a third straight line passing through the outer peripheral-side end portion of the first electrode from the center of the core, a fourth straight line passing through the outer peripheral-side end portion of the second electrode from the center of the core, and the outer peripheral surface is defined as a stress amplification region, the electrode assembly has a winding structure in which at least the outer peripheral-side end portion of the first electrode in the stress amplification region is separated from the inside of the stress vulnerable region along the circumferential direction.

Myriad problems with state of the art lithium based batteries, particularly electrolyte systems thereof, including but not limited to polysulfide shuttling, formation of lithium dendrites and dead lithium during stripping and plating, thermal runaway, volumetric expansion, and strict requirements for electrolyte composition, are well documented in the art and remain major obstacles to realizing the unsurpassed potential for lithium-based batteries as ideal energy storage solutions. The inventive concepts presented herein address said challenges from a multi-pronged approach, revolutionizing the electrolyte system from different approaches to produce synergistic benefits, both within the individual approaches and particularly in combination. The inventive concepts improve electrolyte systems with respect to solvents, electron withdrawing compounds, lithium ion-transporting compounds, performance enhancing additives and chalcogenides. These developments provide benefits including: improved charge / discharge capacity, Coulombic efficiency, cycle life, sulfur optimization, oxidative stability, etc. while reducing polysulfide shuttling and lithium dendrite formation, among other benefits.

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 rechargeable battery is provided that includes: an electrode assembly having an internal space at an innermost side thereof; a cylindrical can accommodating the electrode assembly; and a deformation preventing member that is made of an elastically deformable material. The deformation preventing member is provided with ends spaced apart from each other and such that the deformation preventing member overlaps itself. The deformation preventing member is positioned in the internal space of the electrode assembly and elastically supports the electrode assembly.

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.

An edge detection apparatus and method according to embodiments of the present invention may acquire a first electrode image and a second electrode image with different brightness values in which a same electrode is captured, and detect final edges of an uncoated portion from the second electrode image based on pixel coordinate information of edges of the uncoated portion obtained from the first electrode image, thereby improving detection accuracy of edge detection.