2269results about "Cylindrical casing cells/battery" patented technology

Disclosed is a cylindrical lithium-ion battery, comprising a battery cell, a protection board, a first elastic conductive member, a second elastic conductive member and a fixing cap. The protection board is installed above the battery cell at intervals, a top surface of the protection board is provided with a metal contact. An upper end of the first elastic conductive member abuts against a bottom surface of the protection board and is electrically connected to a positive electrode of the protection board, and a lower end of the first elastic conductive member abuts against a top end of the battery cell and is electrically connected to a positive electrode of the battery cell. An upper end of the second elastic conductive member abuts against the bottom surface of the protection board and is electrically connected to a negative electrode of the protection board.

Provided are electrochemical cells with at least a portion of the exterior surface coated in an aversive coating to deter children from eating the electrochemical cell. Described are compositions and methods for improving the adhesion of the aversive coating to the surface of the electrochemical cell.

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 rechargeable battery includes: a case receiving an electrode assembly and including an opening; a cap assembly including a cap plate coupled to the case to cover the opening, and a terminal plate thermally fused to the cap plate by a thermal-fusion member, the thermal-fusion member electrically insulating the cap plate and the terminal plate from each other; and a sealing part attached to and located on a side of the thermal-fusion member, a side surface of the terminal plate, and an outer surface of the cap plate.

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 present disclosure provides batteries that have a reduced risk or no risk of esophageal or gastrointestinal damage in a conductive aqueous environment, such as when accidentally swallowed. The batteries are, in some embodiments, nominally 9V, 3V or 1.5V coin or button cell-type batteries.

The utility model relates to the technical field of cylindrical batteries, in particular to an aluminum shell cylindrical battery structure with liquid injected at a pole end. Comprising a shell, a roll core is arranged in the shell, the top of the roll core is a negative electrode end, the bottom of the roll core is a positive electrode end, the positive electrode end comprises a cover plate, the edge of the cover plate and the bottom of the shell are subjected to laser welding, the bottom of the cover plate and a positive electrode lug of the roll core are subjected to laser welding, and an anti-explosion valve is arranged in the middle of the cover plate; and a liquid injection hole for injecting liquid is formed between the negative collector plate and the stud. The structure of the positive electrode end is simplified, the cost of structural parts is greatly reduced, and meanwhile, the internal space of the battery cell is fully utilized; compared with the prior art, a conventional bottom liquid injection mode is changed into a top liquid injection mode, so that the turning frequency of the cylindrical battery is reduced, the process is simplified, the equipment investment cost is reduced, the sealing nail is arranged in the liquid injection hole of the stud after the liquid injection is finished, the top end of the sealing nail and the stud are subjected to laser welding, and the sealing and electric connection reliability is effectively ensured.

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 utility model provides a button cell, and the button cell comprises a first housing assembly which comprises a first substrate, a first annular wall and a sealing member, the first annular wall is arranged at the periphery of the first substrate in a surrounding manner, the first annular wall and the first substrate form an accommodating cavity, and at least a part of the sealing member is located at one side, deviating from the accommodating cavity, of the first annular wall; the second shell comprises a second base plate and a second annular wall, the second base plate is used for covering and sealing the containing cavity, the second annular wall is connected to the periphery of the second base plate, the second annular wall comprises a lap joint end, and the lap joint end extends along the side away from the second base plate and is used for forming a sealing structure with the sealing piece and the first annular wall; the second sealing part comprises a first end close to the first base plate, the first end is provided with a first inclined face, and the first inclined face is obliquely arranged relative to the first annular wall. According to the button cell provided by the embodiment of the invention, the problem that the negative electrode cover is easy to bend when the existing button cell is assembled can be solved.

An energy storage element (100) comprises an electrode-separator assembly (104) made up of ribbon-shaped electrodes and at least one ribbon-shaped separator with the sequence anode (105) / separator (156) / cathode (108), which is in the form of a cylindrical winding in which the anode (105), the separator (156) and the cathode (108) are wound around a winding axis A. The anode (105) and the cathode (106) each comprise a current collector (106, 109) with a strip-shaped main region (107, 110) covered with electrode material and a free edge strip (106b, 109b) along a longitudinal edge (106a, 109b) that is not covered with the electrode material.They are arranged within the electrode-separator assembly (104) such that the free edge strip (106b) of the anode current collector (106) emerges from a first terminal end face (104a) and the free edge strip (109b) of the cathode current collector (108) emerges from a second terminal end face (104b) of the winding. A contact plate part (112) rests on one of the edge strips (106b, 109b), covers the end face (104a, 104b) from which this edge strip emerges, and is metallurgically bonded to this edge strip. The current collector, on whose edge strips (106b, 109b) the contact plate part (112) rests, is arranged in the cylindrical winding in a spiral configuration and has an outer turn (181) with a maximum radius R1. The contact sheet part (112) has a maximum radial extent Emax on the end face (104a, 104b) it covers, starting from the intersection of the contact sheet part (112) with the winding axis.In this case, the area of ​​the edge strip (106b, 109b) encompassed by the outer winding (181) is at least partially bent radially inwards and Emax < R1.

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.

A cylindrical secondary battery includes an electrode assembly provided with an electrode tab; a battery can configured to accommodate the electrode assembly through an opening defined at one side thereof; a cap plate covering the opening; a collector disposed between the electrode assembly and the cap plate to electrically connect the electrode tab to the battery can; and a spacer having a body part disposed between the collector and the cap plate, a sealing part configured to seal a gap between the battery can and the cap plate, and a connection part configured to connect the body part to the sealing part. The collector includes a center part; a can coupling part coupled to the battery can; and a bridge connecting the center part to the can coupling part. The bridge of the collector and the connection part of the spacer do not overlap other.

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.

An embodiment of the present invention provides a secondary battery capable of concurrently securing a vibration characteristic and an insulation function of an electrode assembly by using one finishing tape. To this end, a secondary battery according to an embodiment of the present invention may comprise: an electrode assembly including a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate; a can for receiving the electrode assembly; a cap assembly for sealing the can; a first current collection plate provided above the electrode assembly and electrically connected to the first electrode plate and the cap assembly, respectively; a second current collection plate provided under the electrode assembly and electrically connected to the second electrode plate and the can, respectively; and a finishing tape having a first region which has an adhesive layer formed thereat to surround the circumferential surface of the electrode assembly, and a second region which can surround a space beyond the upper end of the electrode assembly.

Provided are electrochemical cells with at least a portion of the exterior surface coated in a conductive aversive coating to deter children from eating the electrochemical cell. Described are compositions and methods for preparing electrochemical cells with aversive coatings capable of conducting electricity through the coating.

The present application relates to the technical field of lithium-ion batteries, and specifically relates to a cylindrical lithium-ion battery having improved high-temperature storage performance and high-temperature cycle performance. The cylindrical lithium-ion battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte solution, wherein the negative electrode comprises a negative electrode material layer containing a negative electrode active material, the negative electrode active material comprising a silicon-based material; and the non-aqueous electrolyte solution comprises a lithium salt, an organic solvent and an additive, the organic solvent comprising dimethyl carbonate, and the additive comprising a silane compound represented by structural formula 1. The cylindrical lithium-ion battery satisfies the following condition: 0.04≤(100-D)×F / S≤5, wherein 50≤D≤75, 0.01≤F≤0.5, and 5≤S≤20. In the cylindrical lithium-ion battery of the present application, the electrolyte solution contains the silane compound represented by structural formula 1 as an additive and dimethyl carbonate as the organic solvent, and therefore the problem of battery failure caused by the expansion of the silicon-based negative electrode can be improved, the service life of the battery can be prolonged, the battery is ensured to have good high-temperature performance, and the effect of inhibiting gas production during high-temperature storage is obvious.

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.

Disclosed is a cylindrical battery, and a battery pack and a vehicle including the same. 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; and a cylindrical battery housing accommodating the electrode assembly. When a first fan-shaped region surrounded by a first straight line and a second straight line passing from a center of the core through a core side end of the first electrode and a core side end of the second electrode, respectively, and the outer circumference is defined as a stress vulnerable region, and a second fan-shaped region surrounded by a third straight line and a fourth straight line passing from the center of the core through an outer circumference side end of the first electrode and an outer circumference side end of the second electrode, respectively, and the outer circumference is defined as a stress amplification region, the electrode assembly has a winding structure in which among the stress amplification region, at least the outer circumference side end of the first electrode is spaced apart from the inside of the stress vulnerable region along a circumferential direction.

The invention provides winding equipment and a winding method, and belongs to the technical field of batteries. The winding equipment comprises a feeding mechanism and a winding needle, and the feeding mechanism is used for conveying a pole piece and a diaphragm; the winding needle is used for winding a pole piece and a diaphragm conveyed by a feeding mechanism to form an electrode assembly, and the relation between the diameter r of the winding needle and the diameter R of the wound electrode assembly meets # imgabs0 #

The application relates to an electrode assembly (100, 100A) including a first electrode assembly (110) having first multiple windings of a first laminate (210), the first laminate (210) including a first electrode (10), a separator (30), and a second electrode (20), a middle portion (120, 160, 170) surrounding the first electrode assembly (110) and a second electrode assembly (130) that surrounds the middle portion (120, 160, 170), the second electrode assembly (130) having second multiple windings of a second laminate (220), the second laminate (220) including a first electrode (40), a separator (60) and a second electrode (50), wherein the middle portion (120, 160, 170) adjusts a gap between the first electrode assembly (110) and the second electrode assembly (130) according to pressure changes, or wherein the first laminate (210) and the second laminate (220) are disposed separately from each other, and the middle portion (120, 160, 170) is integrally connected with one the first laminate (210) or the second laminate (220).