725results about "Non-aqueous electrolyte cells" patented technology

The present invention relates to an electrode and / or cathode stabilized by a transition layer, comprising: (a) a porous chalcogenide-based electrode, more desirably sulfur, comprising of predominantly crystalline allotropes within the core; (b) at least one of a glass, polymeric and amorphous chalcogenide, more desirably sulfur allotropes present within the transition layer and / or shell covering the surface of the active electrode material, the transition layer comprising of a two-dimensional (2D) material, covalently bonded between said 2D material and the chalcogenide, more desirably sulfur of the electrode material, and 12 weight % or less, based on the total weight of the coated electrode, of polymeric sulfur; and (c) a coating layer on top of the transition layer said coating layer comprising a 2D material, (d) a presence of density gradient between the crystalline core and glass / polymeric / amorphous shell, (e) an electrode in which the volume of crystalline allotrope present within the inner voids represents a buffer volume utilized to compensate the volumetric fluctuation during battery cycling, (f) a chalcogenide electrode, more desirably a sulfur-rich electrode, where the electrode active mass consists of binary and or ternary dopant such as selenium, tellurium having composition (SexSy), (TexSy), (TexSySez), wherein the mass content of sulfur in the cathode is above 50% per weight of the total chalcogenide content, wherein (g) the coated electrode and / or cathode, comprising at least one sulfur allotrope that is doped with a chalcogenide, a halogen, or a mixture thereof, more desirably comprised from 0.001 to 50 weight % of the chalcogenide, halogen or mixture thereof, based on the total weight of the sulfur allotrope, such as 0.01 to 49 weight %, 0.1 to 45 weight %, 0.5 to 44 weight % or 0.75 to 43 weight %, such as 1 weight %, 1.5 weight % or 2 weight % of the chalcogenide, halogen or mixture thereof.

A lamination apparatus, comprising a lamination mechanism, a first feeding mechanism for conveying a first electrode sheet to the lamination mechanism, and a second feeding mechanism for conveying a second electrode sheet to the lamination mechanism, the first feeding mechanism and the second feeding mechanism being arranged on two sides of the lamination mechanism in the width direction, respectively. The lamination mechanism comprises a plurality of lamination tables arranged at intervals in the length direction, and comprises lamination robot components arranged corresponding to the lamination tables. The lamination robot components can each grasp the first electrode sheet and the second electrode sheet and carry same to a corresponding lamination table for alternating lamination. The first feeding mechanism and the second feeding mechanism each comprise a magnetic levitation conveying line for conveying the first electrode sheet or the second electrode sheet, and comprise a detection part disposed on one side of the magnetic levitation conveying line; the detection part can visually locate and detect the posture of the first electrode sheet or the second electrode sheet grasped by the lamination robot component. According to the described lamination apparatus, a high lamination efficiency and a high practicability can be achieved.

The invention discloses an ultrasonic welding head, a tab, an electrode assembly, a single battery, a battery and a power utilization device.The ultrasonic welding head comprises a welding head body and first welding teeth, the welding head body is provided with a welding face, the first welding teeth are arranged on the welding face in a protruding mode, and each first welding tooth comprises a plurality of tooth parts; the multiple tooth parts are the first tooth part and the mth tooth part which are sequentially arranged in the protruding direction of the first welding tooth, the nth tooth part is arranged on the end face of the end, away from the welding face, of the (n-1) th tooth part, the end face of the end, away from the welding face, of the (n-1) th tooth part exceeds the nth tooth part, and n is larger than or equal to 2 and smaller than or equal to m. The ultrasonic welding head can reliably weld corresponding parts of the battery monomer, and the service reliability of the battery monomer is improved.

The invention relates to an automatic pole piece waste collecting method for an automatic lithium battery winding machine in the technical field of information, which comprises the following steps of: arranging a vacuum suction nozzle array below a cutting device, connecting the vacuum suction nozzle array to a central vacuum pump, setting proper vacuum degree and suction time according to material characteristics and sizes of cut waste, and collecting the cut waste by a vacuum pump; the cut waste is automatically sucked and conveyed by controlling starting and stopping of the vacuum pump and the suction force. A flow sensor is installed in a vacuum suction pipeline, the speed and pressure of sucked airflow are monitored in real time, whether the suction process is normal or not is judged according to a preset flow curve, and if the abnormal condition of insufficient suction or airflow turbulence occurs, parameters of a vacuum pump are adjusted in time; the method comprises the steps of collecting and analyzing images of sucked waste materials, recognizing and classifying material types and shape features of the waste materials by adopting a convolutional neural network algorithm, and estimating the quantity and weight of the waste materials in combination with suction time and vacuum degree data so as to provide a basis for subsequent waste material recovery and treatment.

The invention discloses a high mass specific energy power primary battery and electric equipment, and relates to the technical field of batteries. Comprising a cover group, a shell, a positive pole piece, a diaphragm, a negative pole piece, a thermistor, an electrolyte, a bottom cover plate and a hole plugging piece, the shell is of a hollow cylindrical structure with two open ends and is covered by the cover set and the bottom cover plate to form a containing cavity. A collector plate and a pole are made of a high-conductivity metal material, and the pole and a cover group body are hermetically connected through a glass body; the negative pole piece is provided with a supporting structure, each of the positive pole piece and the negative pole piece is provided with at least one pole lug, the positive pole piece or the negative pole piece is coated with a diaphragm of a coating layer and placed in the accommodating cavity, the negative pole lug is connected with a bottom cover plate, the positive pole lug is connected with one end of a thermistor, the other end of the thermistor is connected with a collector plate, and electrolyte is injected to prepare the battery. The problems of continuous current output of more than 5C, use in an environment of-55 DEG C to 125 DEG C, overload impact of gravitational acceleration of more than 10 times, impact of environment temperature, storage for more than 10 years and the like of a primary battery are solved.

The utility model belongs to the technical field of lithium battery processing, and particularly relates to a device for loading a lithium battery roll core into a shell. Comprising a guide block and a shell, a cavity for accommodating a roll core to be loaded is formed in the shell; the guide block is arranged at the opening end of the shell, and a vertically-through guide groove is formed in the guide block. When the material guide block is aligned with the opening of the shell, the opening of the material guide block is always aligned with the position of the feeding groove of the shell through the clamping groove and the positioning piece of the clamping block, displacement is avoided, and therefore it is ensured that when entering the shell, a roll core is not scratched by a concave-convex face caused by dislocation of the feeding groove and a cavity.

The present invention provides a simulation method, a simulation device, and a simulation program. A method for simulating a cell in which the electrolyte is a molten salt, the simulation method involving simulating the behavior of the cell and including a process for raising the temperature of the molten salt.

The invention relates to a composite current collector and a preparation method thereof, an electrode plate, a battery and an electric device. The composite current collector comprises a supporting layer, a bonding layer and a conducting layer, wherein the bonding layer and the conducting layer are sequentially stacked on the two opposite surfaces of the supporting layer in the direction away from the supporting layer; according to the composite current collector, the stripping force between the supporting layer and the conductive layer is effectively improved, and the stripping risk of the composite current collector under long-term soaking in electrolyte is reduced.

The present invention relates to the field of electronic cigarette battery processing, and in particular to a shaping tool for the production of electronic cigarette lithium batteries. The technical problem is: in the prior art, the shaping process of electronic cigarette batteries is easily deformed by clamping, and it takes a lot of time, with poor applicability, and it is also easy to over-shape the electronic cigarette batteries. The technical solution is: a shaping tool for the production of electronic cigarette lithium batteries, including a base and a support table, etc.; the base is fixed with a support table. The present invention can quickly complete the reversal of the lithium battery body by clamping the lithium battery body through the contact piece to rotate, which greatly saves time, and cooperates with the shaping roller to cling to the arc surface of the lithium battery body to perform flexible shaping on the lithium battery body, reduce the wear of the lithium battery body, avoid excessive shaping of the lithium battery body, and improve the shaping efficiency. In addition, the elastic telescopic part I provides elastic force, so that the tool can effectively adapt to the shaping of multiple lithium battery bodies of different sizes while ensuring the safety of the lithium battery body, and has strong applicability.

The lithium battery cover assembly comprises a top cover, an anti-explosion piece, an insulating washer, a pore plate and a sealing ring, the anti-explosion piece is provided with a bending part, an annular scribed line is arranged on the inner side of the bending part, the insulating washer is provided with a wrapping part and a first extending part, the wrapping part wraps the bending part of the anti-explosion piece and the outer edge of the pore plate, and the first extending part is arranged on the outer edge of the pore plate. The first extending part is located between the anti-explosion piece and the pore plate, and a second extending part is arranged at the bottom of the sealing ring. According to the utility model, the hole plate and the bending part of the anti-explosion sheet are coated through the insulating washer structure, and an enough gap is formed between the insulating washer structure and the sealing ring, so that the area of the pressure relief through hole of the cover assembly is increased to the greatest extent under the condition that interference does not occur after sealing, the top pressure relief rate during thermal runaway of the battery cell is improved, and the safety performance of the battery cell is improved.

The present invention relates to the field of lithium battery processing technology, and in particular to a cell flipping mechanism for lithium battery production, comprising a flipping mechanism and a pushing mechanism for pushing the cell arranged on the side of the flipping mechanism, the flipping mechanism comprising a rebound roller assembly for clamping the cell, a pressing cylinder assembly for driving the rebound roller assembly to clamp the cell, and a flipping drive cylinder for driving the rebound roller assembly to flip, and the pushing mechanism comprising a first-level pushing cylinder, a second-level pushing cylinder and a pushing cylinder. The present invention is provided with a flipping mechanism, which solves the problem of the collapse of the cell tab due to gravity in the first circle of the cell diaphragm through a 180° flipping mechanism, thereby improving the cell yield; at the same time, the flipping platform adopts an automatic rebound low-resistance roller structure design, which prevents friction and scratches on the cell surface when the cell passes through the flipping platform.

Provided is a system and medical device that includes self diagnosing control switches. The control switch may be slidable within a slot in order to control activation of some function of the medical device. Due to natural wear and tear of movement of a control switch, the distances along the sliding slot that correspond to how much energy is used for the function may need to be adjusted over time in order to reflect the changing physical attributes of the actuator mechanism. The self diagnosing control switches of the present disclosures may be configured to automatically adjust for these thresholds using, for example, Hall effect sensors and magnets. In addition, in some cases, the self diagnosing control switches may be capable of indicating external influences on the controls, as well as predict a time until replacement is needed.

The invention discloses a lithium battery processing roundness shaping device and method, and relates to the technical field of lithium battery processing, the lithium battery processing roundness shaping device comprises a positioning frame, and the inner side of the positioning frame is provided with a position adjusting rounding piece connected with a transverse push rod. By arranging the position adjusting and rounding piece and starting the first servo motor, the shortest distance between the edge of the correction roller and the circle center of the supporting plate is adjusted to be equal to the target radius of the battery cell, the telescopic air cylinder is started, the correction roller moves by a certain distance in the direction away from the circle center of the supporting plate, and one-time rounding treatment can be conducted on the battery cell by rotating the correction roller in the same direction; then the telescopic air cylinder drives the movable sleeve plate to move to enable the positioning plate to be attached to the movable sleeve plate again, so that the shortest distance between the correction roller and the circle center of the supporting plate is equal to the target radius of the battery cell, rounding treatment is conducted on the battery cell again through rotation of the correction roller, and therefore part of internal stress of the pole piece and the diaphragm can be released; and material fracture or drape aggravation caused by forced shaping is avoided.

Provided are a stacking device, a stacking production line and a stacking process, wherein the stacking device comprises a feeding assembly, a conveying assembly, a positioning assembly and a stacking station; the conveying assembly comprises a turntable and a plurality of manipulators arranged on the turntable; the turntable is used for controlling the manipulators to switch among the feeding assembly, the positioning assembly and the stacking station; the stacking production line comprises the high-speed stacking device; and the stacking process is achieved by the high-speed stacking device or the stacking production line, including electrode sheet feeding, electrode sheet positioning, electrode sheet feeding for the second time, stacking, stacking calibration, and unloading. It has the advantages of low device cost and small occupied space, with a reduced personnel cost, and can also realize the uniformity and consistency of stacking without the monitoring by operators.

The invention provides a thick-electrode positive plate, a preparation method thereof and a primary battery. The method comprises the following steps: firstly, mixing a positive active material, a conductive agent and binder resin to obtain a mixture; carrying out fibration treatment on the mixed material to obtain a fibration mixed material; then, the fiberized mixed material and a granulating agent are subjected to granulation treatment, a precursor material is obtained, and the granulating agent is liquid with the vapor pressure not lower than 0.2 mmhg; finally, the precursor material is subjected to rolling film forming treatment, and the thick electrode positive plate is obtained. The preparation method provided by the invention can be widely applied to a battery system in which the thick electrode (greater than 500 microns) needs to be manufactured by using the current collecting net, and solves the problems that the thick electrode pole piece using the current collecting net is difficult to continuously and automatically produce, the powder falling rate of the pole piece is high, the thickness is not uniform and the like.

A logging system and method for operating a logging system are typically used in a wellbore. The logging system may include a logging instrument including a rechargeable energy storage and logging electronics, and a cable configured to trickle charge the rechargeable energy storage. The rechargeable energy storage may include an ultracapacitor. The rechargeable energy storage may be trickle charged through the cable from a remote power source.

The invention discloses a pole piece lamination deviation rectification method and system, and relates to the technical field of energy storage batteries, and the method comprises the steps: S100, obtaining the position of a lamination table, and determining the preset standard position of a pole piece on a deviation rectification table; s200, acquiring a preset distance between the range finder and the pole piece at the preset standard position of the pole piece; s300, the actual distance between the distance measuring instrument and the pole piece arranged on the deviation correcting table is obtained; s400, according to the actual distance and the preset distance, the deviation rectifying table is driven to move so that the pole piece can move till the distance between the pole piece and the distance meter is equal to the preset distance; and S500, executing a pole piece lamination process. The preset standard position and the actual position of the pole piece on the deviation rectifying table are obtained through the distance measuring instrument, the deviation rectifying table is directly moved, so that the pole piece reaches the required lamination position, the edge grabbing error of the pole piece is avoided, the lamination effect is better, the accuracy is higher, and the pole pieces of various specifications can be effectively laminated.

The present application relates to the technical field of batteries, and provides a battery cell, a battery, and an electric device. The battery cell comprises a casing, a plurality of electrode assemblies, and a buffer structure; the electrode assemblies are arranged in the casing; the buffer structure is arranged between the two adjacent electrode assemblies; and / or the buffer structure is arranged between the electrode assemblies and the inner wall of the casing; and the compression volume V of the buffer structure, the compression ratio B of the buffer structure, and the battery cell capacity Cn of the battery cell satisfy the following relational expression: 0.7(mL / Ah)≤V*B / Cn≤1.0(mL / Ah). The deposition layer formed by the negative electrode in the battery cell can be buffered and limited by the buffer structure, so that the probability of micro-short circuit of the electrode assemblies caused by puncturing the separator by a sharp structure formed by growing the deposition layer in any direction is reduced.

The utility model discloses a button type lithium-manganese battery. A positive electrode comprises a positive electrode cup shell, a positive electrode active cake arranged in the positive electrode cup shell and a current collecting net positioned between the positive electrode cup shell and the positive electrode active cake; the positive electrode active cake comprises a sleeve cup and a positive electrode active material which is pressed and formed in the sleeve cup; the negative electrode comprises a negative electrode cup cover and a negative electrode active cake arranged in the negative electrode cup cover; the sealing ring is positioned between the cathode cup cover and the anode cup shell for surrounding connection of the cathode cup cover and the anode cup shell; the diaphragm is positioned between the negative active cake and the positive active cake; the cathode cup cover is provided with a top wall, a flanging peripheral wall and a transition connecting wall; the transition connecting wall is an arc-shaped wall and is provided with two continuous transition R-angle connecting positions, and the two transition R-angle connecting positions of the transition connecting wall are connected with the top wall and the peripheral wall of the folded edge respectively; wherein the top wall of the negative electrode cup cover is in a necking shape, and the diameter of the outer edge of the top wall is smaller than 2 mm compared with the retraction distance of the peripheral wall of the folded edge. The utility model has the advantages of compact structure and good sealing performance.

The non-aqueous electrolyte battery is excellent in high-temperature storage characteristics and load characteristics at low temperature. A non-aqueous electrolyte battery of the present invention includes a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte. The negative electrode includes a lithium layer, a lithium-aluminum alloy layer formed on a surface of the lithium layer, and a carbon layer on the lithium-aluminum alloy layer. The non-aqueous electrolyte battery of the present invention can be manufactured by a method for manufacturing a non-aqueous electrolyte battery that includes providing an aluminum layer on the surface of the lithium layer to obtain a laminate, forming the carbon layer on a surface of the aluminum layer to obtain a laminate for a negative electrode, and causing the lithium layer and the aluminum layer of the laminate for a negative electrode to react with each other to form the lithium-aluminum alloy layer.

A battery-powered node includes a primary cell, a secondary cell, and a battery controller. The battery controller includes a current source that draws power from the primary cell to charge the secondary cell. The battery-powered node draws power from the secondary cell across a wide range of current levels. When the voltage of the secondary cell drops beneath a minimum voltage level, the current source charges the secondary cell at a constant current level and a charging signal is sent to the battery-powered node. When the voltage of the second cell exceeds a maximum voltage level, the current source stops charging the secondary cell and the charging signal is terminated. The battery-powered node records the amount of time the charging signal is active, which can be used to determine a battery depletion level for the primary cell. Battery replacement may then be efficiently scheduled based on the depletion level.

The invention discloses an edge printing method for a rectangular lithium battery, which comprises a printing module and a clamp, the printing module is used for spraying insulation UV ink, and the clamp is used for placing and transporting the rectangular lithium battery; the printing step comprises the steps that S1, the spraying face of the printing module and the lithium battery of the clamp are arranged in a relative included angle mode; s11, when the spraying face of the printing module is horizontally arranged, the clamp drives the lithium battery and the spraying face to form a relative inclination angle, and the edge and the spraying face form a relative inclination angle; s12, when the lithium battery is conveyed through the first conveying device and is vertically arranged, the spraying face of the printing module is obliquely arranged, and the spraying face and the edge of the lithium battery form a relative inclination angle; and S2, the printing module takes the edge as a printing surface, the preset printing area is calculated, the number of spraying holes of the printing module is calculated, the number and the arrangement mode of the spraying holes are compared with the enlarged printing area, and the two sides of the enlarged large printing area extend to the non-curved-surface positions of the A surface and the B surface.

The utility model relates to the field of batteries, and provides a pole piece, a roll core and a battery, and the pole piece comprises a first piece body and a second piece body, the first sheet body comprises a sheet body part and a tab part which are connected with each other and are arranged along a first direction; the width of the second sheet body is smaller than that of the first sheet body in the first direction, the second sheet body is connected to one end of the sheet body part in the second direction, and the second direction is perpendicular to the first direction. Wherein the second sheet body is used for being wound to form an infiltration channel, the sheet body part is used for being wound on the periphery of the second sheet body, the infiltration channel comprises a port arranged close to the tab part, the tab part is used for being bent towards the port and arranged around the port, one end, away from the sheet body part, of the tab part is enclosed to form a through port, and the through port is communicated with the infiltration channel. Due to the fact that the number of the tabs is reduced, the situation that the infiltrating channels are blocked by the tab parts after the pole pieces are wound can be relieved, electrolyte can enter the infiltrating channels more easily, and the electrolyte can infiltrate the pole pieces fully.

An electrode assembly (100), a battery cell (201), a battery (200), and an electrical device (1000). The electrode assembly (100) comprises a first electrode plate (10), a second electrode plate (20) and a separator (30), the separator (30) isolating the first electrode plate (10) from the second electrode plate (20), and the first electrode plate (10), the second electrode plate (20) and the separator (30) being wound to form an integral body. In an innermost ring of the electrode assembly (100), the first electrode plate (10) is disposed closer to an inner side of the electrode assembly relative to the second electrode plate (20). The first electrode plate (10) comprises a body (11), and a tab (12) connected to the body (11). The body (11) is formed having a notch (13) extending along a width direction of the first electrode plate (10). The notch (13) and the tab (12) are disposed at an interval along a winding path of the electrode assembly (100).

The utility model provides a positioning bracket and a battery, and relates to the technical field of batteries. The positioning support comprises a limiting plate, an abutting piece and a first insulating piece. A first through hole is formed in the limiting plate, and the limiting plate is configured to limit the expansion of the positive electrode of the lithium thionyl chloride battery; the abutting piece is arranged on the side, away from the positive electrode, of the limiting plate, and the abutting piece is configured to abut against the inner wall of a shell of the lithium thionyl chloride battery or abut against a center pole of the lithium thionyl chloride battery in the radial direction of the first through hole; the first insulating part is arranged on the abutting part, and the first insulating part is configured to insulate and isolate the abutting part from the part abutting against the abutting part. In the application, through the positioning bracket, after the positive pole absorbs liquid and expands to generate upward thrust on the positioning bracket, the positioning bracket can move upwards along with the expansion of the positive pole, so that the position of the positioning bracket is consistent with the height of the positive pole after completing liquid absorption and expansion; therefore, the position of the positioning bracket can be matched with the expansion height of the positive electrode after the lithium thionyl chloride battery is infiltrated.

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).

The utility model belongs to the technical field of rubberizing devices, and particularly relates to a lithium battery winding rubberizing mechanism which comprises a base and a two-way screw, mounting frames are arranged on one side of the top of the base, a first groove is formed in the other side of the top of the base, a rubber belt wheel is arranged between the two mounting frames, and a second groove is formed in the other side of the top of the base. A first groove is formed in the front side wall of the base, a two-way screw rod is installed in the first groove in an embedded mode, a first motor is arranged on the front side wall of the base, and one end of the two-way screw rod is connected with a rotating shaft of the first motor. According to the lithium battery rubberizing device, lithium batteries of different specifications can be rubberized accurately, the lithium batteries are prevented from shaking during rubberizing, the rubberizing accuracy and stability are ensured, and the rubberizing quality is greatly improved.

The utility model discloses a hot pressing device for lithium battery production, which is characterized in that a pressure-bearing seat is arranged on a working table through a first driving mechanism, the first driving mechanism is used for driving the pressure-bearing seat to perform translation adjustment along the length direction of the working table, a lower pressing seat is arranged above the working table through a second driving mechanism, and a plurality of hot pressing blocks are arranged on the lower surface of the lower pressing seat at intervals; the second driving mechanism is used for pushing the downward pressing base to move downwards to achieve the downward pressing action, and a plurality of press-fitting grooves for the hot pressing blocks to be clamped in one by one are formed in the upper portion of the pressure bearing base at intervals. According to the utility model, the lifting rod is pushed and the push rod is driven to move upwards under the extrusion action of the inclined surface of the inclined surface extrusion seat, and the top end of the push rod protrudes to the inner wall of the press-fitting groove until materials are pushed out of the press-fitting groove, so that the blanking is convenient; the action of pushing the materials out of the press-fitting groove depends on the inclined surface of the inclined surface extrusion seat to extrude the lifting rod and drive the push rod to move upwards; and the linkage effect is achieved, so that the material pushing action is achieved without additional driving, and the investment of equipment cost is saved.

The invention relates to a high-speed and high-efficiency PNP mechanism for preventing multiple pieces from being taken. The high-speed and high-efficiency PNP mechanism comprises a horizontal servo sliding table, a manipulator lifting assembly I and a pole piece bending assembly, the pole piece bending assembly comprises a fixed bracket, a length adjusting plate and a pole lug adjusting plate; a plurality of vacuum chucks are mounted at the lower ends of the length adjusting plate and the tab adjusting plate; one end of the length adjusting plate is directly and rotatably connected with the fixed bracket, and the other end is indirectly connected with the fixed bracket through the bending cylinder; and the piece bending air cylinder does telescopic motion to enable the length adjusting plate to be switched back and forth between the horizontal position and the upward inclined position, so that the grabbed pole pieces are greatly bent and separated from the pole pieces on the lower layer. The pole pieces are greatly bent along the long sides of the pole pieces through the piece bending mechanism, the pole pieces which are bonded together are separated, and the larger the amplitude is, the better the effect of reducing double pieces after piece bending is achieved. The lifting adopts servo control, is accurate in control, can be in vertical shaking linkage with a cylinder bent sheet, does not occupy the effective time for taking the sheet, and can effectively improve the overall efficiency of the lamination stacking machine.

An ultrasonic welding head (10). The ultrasonic welding head comprises a welding head main body (1) and first welding teeth (2); the welding head main body is provided with a welding surface (1a), the first welding teeth protruding from the welding surface; the first welding teeth comprise a plurality of tooth parts (20), the plurality of tooth parts respectively being a first tooth part (21) to an m-th tooth part which are successively arranged in the protruding direction of the first welding teeth; the n-th tooth part is arranged on the end surface of the end of the (n-1)th tooth part away from the welding surface, the end surface of the end of the (n-1)th tooth part away from the welding surface exceeding the n-th tooth part, and 2≤n≤m. The present application further relates to an ultrasonic welding device, an electrode assembly (30), a battery cell (100), a battery (200), and an electrical device (1000).