88results about How to "Avoid falling powder" patented technology

The invention relates to a lithium ion battery lamination unit, a battery cell, a battery cell preparing method and a lithium ion battery and belongs to the technical field of lithium ion batteries. The lithium ion battery lamination unit comprises an inner electrode slice, membranes and outer electrode slices, wherein the polarity of the inner electrode slice and the polarity of the outer electrode slices are opposite, the membranes are attached to the two side faces of the inner electrode slice respectively through a binder, and the outer electrode slices are attached to the outer side faces of the membranes through the binder. According to the lithium ion battery lamination unit, on one hand, dislocation of the membranes relative to the electrode slices can be prevented, and a short circuit between a positive plate and a negative plate can not be formed; on the other hand, during battery cell manufacturing, due to the fact that part of procedures of clamping membranes in the electrode slices are omitted, battery cell manufacturing time is shortened greatly, and the production efficiency of the lithium ion battery is improved.

This invention provides a kind of winded Li-secondary cells including a shell, a core winder and electrolyte in the shell, in which, the core winder is formed by winding positive pole plates, membranes and negative pole plates characterizing in setting a protection layer inside of the pole plates at the bending place of the winder to avoid that active substance at the inside of the pole plates at the bending place falls off from a collector effectively and fall off substance will not move around due to the protection of glue paper so as to avoid micro-short-circuit in the cell.

The invention relates to a preparation method of a high-efficiency negative active material for a lithium ion secondary battery. Lithium-silicon alloys Li4.4Si, Li3.25Si and Li1.71Si are prepared by high-energy ball milling. The preparation method is simple, pollution-free and high in safety. At the same time, a suitable solvent is added in the high-energy ball milling to serve as a lubricant, thereby greatly improving the efficiency of an alloying reaction. A composite material is prepared from a lithium-silicon alloy together with pre-ball-milling silicon powder, graphite and carbon has a unique structure, which inhibits the volume expansion of materials during charging and discharging. Moreover, LixSi has high capacity and higher conductivity than pure silicon, and contains lithium, which can inhibit the formation of an SEI film in the first week and improve the first week coulombic efficiency of materials. Secondly, the experimental results of the invention show that the synthesized LixSi can be transformed into amorphous silicon after lithium removal, thereby effectively alleviating the volume change during charging and discharging, and exhibiting cycle performance far exceeding that of crystalline silicon. The high-efficiency negative active material is environmentally friendly, simple and feasible in preparation method and instrument and equipment, high in safety, and suitable for industrial production.

The invention provides a lithium battery diaphragm for power vehicles. The diaphragm has four layers, the layers are respectively from bottom to top a base diaphragm, a nanometer flame retarding layer, an electrospun nanofiber layer and a thermal closed layer, wherein the base diaphragm is a PET nuclear pore membrane with a thickness of 5 microns-20 microns, the nano meter flame retardant layer is a flame retardant ceramic slurry with a thickness of 0.5 micron-10 microns, the thickness of the electrospun nano-fiber layer is 2 microns-5 microns, and the heat closed layer is a heat-resistant epoxy resin with a thickness of 5 microns-10 microns. The invention also provides a preparation method of the lithium battery diaphragm; the heat-resistance and shrinkage performance of the prepared lithium battery diaphragm can be greatly improved, the thermal stability and thermal closed property are significantly improved, and the security is very good.

The invention discloses a winding cell and a battery. The winding cell comprises electrode pieces, a separator and an adhesive tape, wherein the electrode pieces comprise a positive electrode piece and a negative electrode piece; the separator is arranged between the positive electrode piece and the negative electrode piece; the adhesive tape is attached to the surface of the positive electrode piece and is attached to a corner position of the positive electrode piece; the adhesive tape can also be attached to the surface of the negative electrode piece and is attached to a corner position ofthe negative electrode piece; and one side, or, both sides, of the electrode piece is bonded with the adhesive tape. By a bonding mode, safety hazards caused by cracking occurring during the hot pressing process of the electrode piece can be effectively avoided, precipitation of metal lithium is prevented, and the safety performance of the winding cell is improved.

The invention provides a sodium ion battery negative electrode slurry. The slurry comprises a negative electrode active substance, a conductive agent, a binder, a plasticizer and a solvent. Plasticizer molecules are inserted among polymer molecular chains in order to weaken the stress among the polymer molecular chains, reduce the crystallization degree of the polymer molecular chains and increase the plasticity of a polymer. The plasticizer is added to improve the dry brittleness and bulky edge problems of a coating, increase the flexibility of an electrode plate, avoid the powder dropping of the electrode plate and obviously enhance the processing performance of the electrode plate. The invention also provides a preparation method of the sodium ion battery negative electrode slurry, used for preparing the negative electrode slurry. The invention further provides a sodium ion battery negative electrode plate.

The invention discloses a lithium ion battery pole sheet making method. The method comprises: a pole sheet coating slitting operation; a pole sheet surface treatment operation comprising a step of immersing a coat-slitted pole sheet in an aqueous high-polymer treatment liquid, and a step of drying to obtain a high-polymer film on the surface of the pole sheet; and a made sheet packaging operation. The method which allows the pole sheet surface treatment operation to be increased and the high-polymer film to be formed on the surface of the pole sheet can effectively prevent the powder fall of the lithium ion battery pole sheet, reduce the floatation powder generated in the making process of a battery, improve the bonding force of active substances, and improve the comprehensive electrochemical performances of the lithium ion battery. The invention also discloses a surface treatment device of the lithium ion battery pole sheet. The device comprises, sequentially arranged, an unreeling wheel, a pole sheet immersion material tank, a spreading knife, a drying tunnel, roller machines and a reel wheel, and can automatically and efficiently complete the surface treatment of the pole sheet, so the industrialized continuous production is convenient.

The invention provides a cement-free desulfurized gypsum plastering mortar and a preparation method thereof. The cement-free desulfurized gypsum plastering mortar comprises the following components in parts by weight: 15-20 parts of desulfurized gypsum, 15-20 parts of silicon-calcium slag composite admixture, 60-70 parts of aggregate, 0.2-0.3 part of additive and 10-15 parts of water. The silicon-calcium slag composite admixture is composed of the following components in parts by weight: 40-50 parts of silicon-calcium slag, 1-5 parts of desulfurized gypsum, 30-35 parts of fly ash, 15-25 parts of granulated blast-furnace cinder and 0.05-0.08 part of grinding aid. The cement-free desulfurized gypsum plastering mortar is free of any cement and directly adopts the desulfurized gypsum, silicon-calcium slag and other industrial solid wastes as the basic components, so that the prepared cement-free desulfurized gypsum plastering mortar can satisfy requirements in related standards, and does not need to perform drying, calcination, milling and other processes on the desulfurized gypsum, thereby lowering the energy consumption and pollution in the desulfurized gypsum plastering mortar working process.

The invention belongs to the technical field of heat insulation, and discloses a heat insulation composite board and a preparation method thereof. The heat insulation composite board comprises a firstpanel layer and a heat insulation layer, and the heat insulation layer and the first panel layer are integrally formed; the first panel layer is a fiber reinforced resin-based composite sheet, a metal plate, a cement plate, a calcium silicate plate or a gypsum plate, and the heat insulation layer is a fiber reinforced aerogel felt. The preparation method comprises the following steps of: (1) flatly laying a fiber-reinforced aerogel felt; (2) paving the first panel layer on the upper surface of the fiber reinforced aerogel felt; and (3) carrying out hot press molding treatment to obtain the heat insulation composite board. The heat insulation composite board provided by the invention can implement a thermal insulation scheme on scenes like pipes, walls and box bodies, and has the advantages of convenient operation, simplicity, feasibility and the like.

The invention discloses a bag-making type lithium ion battery and a preparation method thereof. The bag-making type lithium ion battery consists of an aluminum plastic package film, a positive electrode lug, a negative electrode lug, an electrode piece and bag-making type electrode pieces, wherein the electrode pieces and upper and lower layers of membranes are manufactured into a bag containing the electrode pieces in an adhesion manner; the bag-making type electrode pieces and counter electrodes are overlapped together layer to layer to form an electrode group; and the positive electrode lug and the negative electrode lug are respectively welded with a positive electrode lug and a negative electrode lug of the electrode group together. With the adoption of the lithium ion battery provided by the invention, the production efficiency and the yield in manufacturing through a battery assembly process can be improved; and the security problem possibly occurring in a process of using the lithium ion battery can be prevented to a certain extent.

The invention particularly relates to a magnesium oxysulfate melamine paper decoration surface inorganic rock porcelain non-combustible board and a production method thereof, wherein the raw materialscomprise: 40% of magnesium oxysulfate, 12% of magnesium oxide, 5% of alumina, 5% of a glass fiber cloth, 4% of perlite, 3% of electric-conduction procelain clay powder, 3% of electric-conduction micapowder, 4% of lithopone, 11% of 100-200 mesh wood powder, 4% of tourmaline powder, 3% of a balance cloth immersed with a melamine glue, 3% of decoration paper immersed with a melamine glue, and 3% ofwear-resistant paper immersed with a melamine glue. The production method comprises: 1) preparing a magnesium oxysulfate substrate having a fine pore structure; 2) respectively spreading both surfaces of the magnesium oxysulfate substrate with a balance cloth immersed with a melamine glue, decoration paper immersed with a melamine glue, and wear-resistant paper immersed with a melamine glue; and3) carrying out hot pressing molding. According to the present invention, the magnesium oxysulfate melamine paper decoration surface inorganic rock porcelain non-combustible board has advantages of light weight, smooth surface, high hardness, good fireproof performance, good moisture proof performance, good temperature-difference resistance, strong water resistance, no moisture absorption halogenaccumulation, good thermal insulation effect and wide application range, and does not contain asbestos, formaldehyde and harmful radioactive elements.

The invention relates to a light high-efficiency multilayer heat insulation material and a preparation method thereof. The method comprises the following steps: (1) impregnating a fiber preform with sol to prepare an aerogel composite material; (2) wrapping and sewing the aerogel composite material prepared in the step (1) by using fiber cloth to obtain a thermal insulation material preform; and (3) bonding a reflection film on the surface of the thermal insulation material preform obtained in the step (2) to prepare the light high-efficiency multilayer thermal insulation material. The invention also provides the light high-efficiency multilayer heat insulation material prepared by the preparation method, and the material can carry out high-efficiency heat insulation protection on a targetstructure at room temperature -500 DEG C. The light high-efficiency multilayer heat insulation material and the preparation method thereof have simple preparation process and low cost, and are expected to be popularized and applied in the fields of low-temperature heat insulation and civil heat insulation in aerospace.

This invention discloses a winded Li-secondary cell including a shell and a core winder and electrolyte in the shell, in which, the winder is formed by winding positive pole plates, membranes and negative pole plates characterizing in not coating active substance inside of the pole plates at the bending place of the winder to prevent fall off of powder so as to avoid micro-short-circuit in the cell caused by fall off active substance breaking the membrane and increase the quality.

The invention provides a method for forming an aqueous super capacitor. In the method, quantitative electrolyte is added by a vacuum injection method, and the aqueous super capacitor is charged and discharged for activation through different current values in multiple stages. Therefore, the method effectively improves the powder dropping phenomena of pole pieces in the process of formation and enhances the product properties of current leakage and internal resistance of the super capacitor. Meanwhile, the method has the advantages of greatly shortening the forming period and improving the production efficiency.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a fast charging type lithium ion battery pole piece. The method comprises thefollowing steps of coating slurry with active substances on the two surfaces of a current collector to obtain the pole piece with a first active substance layer and a second active substance layer which are symmetrically arranged; rolling the two surfaces of the pole piece; and cleaning the redundant first active material layer to obtain the fast charging type lithium ion battery pole piece witha double-sided coating area and a single-sided coating area. According to the preparation method of the fast charging type lithium ion battery pole piece, the rolling thickness of the single-side coating area of the pole piece after rolling is consistent with that of the double-side coating area, and the compression degree of active substance layers at the two sides of the pole piece can be effectively ensured to be consistent during rolling; and the failure problems of powder falling, lithium precipitation and the like of the single-side coating area in the subsequent charging and dischargingprocess due to different thicknesses of the single-side coating area and the double-side coating area of the pole piece and different compression degrees when the pole piece is rolled to pass througha roll gap in the traditional process, are effectively avoided.

The invention discloses a compound sulfamethoxazole tablet and a preparation method of the compound sulfamethoxazole tablet. The compound sulfamethoxazole tablet takes sulfamethoxazole and trimethoprim as the main drugs, and is added with a filler, an adhesive, a disintegrating agent, a surfactant, a lubricant and a coating agent; and the compound sulfamethoxazole tablet is prepared through the steps of mixing, pelletizing, drying, tableting, coating and the like. The obtained compound sulfamethoxazole tablet composition effectively avoids the condition that the solid compound sulfamethoxazolepreparation is loosened because of weak granule viscosity, the dissolution of the preparation is obviously improved, the stability of the preparation is guaranteed, the product quality of the preparation is improved, the quality and the treatment effect of the preparation are guaranteed, and the compound sulfamethoxazole tablet has an excellent application prospect.

The invention discloses a method for preparing a sintering-free coating of a polycrystalline silicon ingot crucible. The method comprises the following steps: after uniformly mixing silica sol with water, adding silicon nitride and nanosilicon dioxide, and stirring uniformly to obtain a slurry; polishing the inner wall of the crucible with a scouring pad, blowing with compressed air after polishing, then preheating the crucible, and raising the corner temperature of the crucible to 70-80 DEG C; spraying the inner wall of the crucible with the slurry, during spraying, controlling the corner temperature of the crucible at 60-70 DEG C and spraying thickness at 0.8-0.9mm, and after spraying, baking the crucible at 60-70 DEG C for 20-30 minutes. Compared with the prior art, the method can prevent the coating from peeling and dusting, and meanwhile, avoids the crack of the polycrystalline silicon ingot.

The invention mainly relates to the technical field of hygiene products and discloses a method for preparing a strong-absorption antibacterial paper diaper. The method comprises the steps of surface layer preparation, Ag-activated carbon composite fiber layer preparation, water-absorption cotton preparation, water-absorption non-woven fabric preparation, core layer water-absorption layer preparation, bottom water-proof layer preparation and paper diaper preparation. By adopting the method for preparing the strong absorption antibacterial paper diaper, the paper diaper has strong hygroscopicity, achieves instant absorption, can prevent moisture of urine from soaking skin, is breathable and antibacterial, keeps skin to be dry and fresh, avoids generating the allergic phenomenon, and ensuressafety and health; the surface non-woven fabric is prepared by mixing fibers and performing spunlacing and is prepared from chitosan fibers, composite water-absorbent resin fibers, nano-antibacterialbioprotein fibers and silk fibers, so that the surface non-woven fabric can instantly absorb urine after contacting the urine and prevents itching and red rash since the urine contacts skin.

The invention relates to the technical field of conveying mechanisms, in particular to an entering air-flotation type belt conveying mechanism. The conveying mechanism comprises a tab punching mold, avacuum belt conveying mechanism, a servo motor in driving connection with the vacuum belt conveying mechanism, a left belt side plate, a right belt side plate, a left pole piece flotation plate and aright pole piece flotation plate; the front end of the vacuum belt conveying mechanism is arranged below the tab punching mold; the vacuum belt conveying mechanism comprises a vacuum cavity, a belt and negative-pressure gas suction pipe joints; negative-pressure holes are formed in the upper part of the vacuum cavity and the belt; ventilation cavities are formed inside the left pole piece flotation plate and the right pole piece flotation plate; a plurality of blowing holes are formed in the upper part of the left pole piece flotation plate and the upper part of the right pole piece flotationplate; and blowing end gas pipe joints are arranged at the ends of the left pole piece flotation plate and the right pole piece flotation plate. By the aid of the conveying mechanism, the phenomenonthat the front ends of pole pieces or the single edges of the pole pieces scratch the surface of the belt can be prevented, powder falling of the edges of the pole pieces can be avoided, then the polepiece quality in the pole piece forming technology can be guaranteed, and the yield and the safety of pole piece production can be improved.

The invention provides a novel green environmentally-friendly anti-scaling filtering material and a preparation method thereof. The novel green environmentally-friendly anti-scaling filtering materialcomprises 30-50wt.% of powdered attapulgite with 200-600 meshes, 35-45wt.% of powdered humic acid with 200-600 meshes, 5-10% of powdered montmorillonite with 200-600 meshes, 10-15wt.% of powdered zeolite, and 40-60wt.% of a liquid adhering agent. According to the novel green environmentally-friendly anti-scaling filtering material, the raw materials collaborate with each other, so that the novelgreen environmentally-friendly anti-scaling filtering material is free from phosphorus, nontoxic, and nuisanceless, can be completely biologically degraded, is high in adhesion capacity, shows extremely high chelating capacity to ions, and is high in corrosion inhibition function, anti-scaling function, bacteria inhibiting function, smell removing function and other performance; powder is hard tofall off and dissolving is greatly prevented during use; the strength is high; and the novel green environmentally-friendly anti-scaling filtering material can be widely applied to the fields of industrial water treatment, seawater desalting, and the like; the environment is protected; and the cost is low.

The invention provides a negative plate as well as a preparation method and application thereof. On the first aspect, the invention provides a negative plate. The negative plate comprises a current collector and N active layers, wherein the active layer comprises a carbon material and a silicon material, the layer number set of the active layers is recorded as S={1, 2,..., i-1, i,..., N}, N is greater than or equal to 2, and the direction from the first active layer to the Nth active layer is the direction gradually far away from the current collector; and the mass of the silicon material in the (i-1)th active layer is greater than the mass of the silicon material in the ith active layer, and the mass of the carbon material in the (i-1)th active layer is less than the mass of the carbon material in the ith active layer. According to the negative plate provided by the invention, through a mode that the mass of the silicon material is gradually reduced layer by layer and the mass of thecarbon material is gradually increased layer by layer, powder falling of the negative plate in a circulation process can be effectively prevented, the volume expansion rate of the negative plate is reduced, and the circulation performance of the negative plate is improved.

Negative ion gypsum-based putty powder and a preparing method are disclosed and belong to the field of building wall decoration materials. The putty powder comprises 600-750 parts by weight of powder of plaster of Paris, 250-400 parts by weight of an inert filler, 20-50 parts by weight of negative ion powder, 3-10 parts by weight of glue powder, 1-3 parts by weight of a water retaining agent and 0.3-1 part by weight of a retarder. The putty powder has characteristics of high adhesion strength, low shrinkage deformation, capability of preventing peeling, powder dropping and cracking, good workability, excellent construction properties, environment protection, and the like, and is suitable for puttying treatment of various walls. Negative ions can be effectively released through the negative ion powder, thus meeting desire for enjoying nature flavor for people and fundamentally changing the present living environment. The putty powder and the method have good development significance.

The invention relates to a fluorescent powder slurry for plasma display and the formation method on shadow mask, belonging to the technical field of flat panel TV set. The inventive slurry consists of fluorescent powder, organic resin, organic solvent and nanopowder, wherein the fluorescent powder accounts for 40-50 percent of the total weight, the organic resin accounts for 3-6 percent of the total weight, the organic solvent accounts for 45-55 percent of the total weight, and the nanopowder accounts for 0.5-3 percent of the total weight. The proper amount of nanopowder (0.5-3 percent) added into the fluorescent powder slurry can effectively improve the dispersion and the suspension properties of the fluorescent powder in the slurry and can well improve the thixotropy of the fluorescent powder slurry so as to ensure that the slurry viscosity decreases during printing to obtain adequate feeding amount and also ensure that the slurry can rapidly regain the high viscosity and settle at the periphery of small holes other than flowing out when the slurry is printed to the holes of the shadow mask. Meanwhile, the slurry can be oven-dried and sintered after the printing process such that the nanopowder is filled into the gap between particles of fluorescent powder, thereby well bonding the fluorescent powder particles and preventing powder loss resulting from insufficient bonding force of the fluorescent powder.

The invention relates to the technical field of graphite craft product processing, in particular to an isostatic graphite preparation process for craft product processing. The process comprises the following steps: raw material selection, stirring, mixing and kneading, forming, primary roasting, primary dipping, secondary roasting, secondary dipping, tertiary roasting and graphitization / purification. Vibration and vacuumizing treatment are carried out on a kneaded and ground mixture before isostatic compaction, air among powder of the mixture is removed, so influence on the density of a formedgraphite product in the isostatic compaction process is avoided, the density of a formed graphite product is improved, the quality of the formed graphite product is improved, and the technical problem that graphite products cannot be applied to artware processing due to density factors is solved.

The present invention relates to magnetic bar, and is especially one kind of adhesive magnetic bar with high wear resistance. The magnetic bar consists of adhering layer, base belt, magnetic layer and protecting layer, and features the protecting layer comprise ternary polymer 5-90 (in weight portions, the same below), polyurethane 5-100, assistant 2-30, antistatic agent 3-30, grinding agent 1-20, dispersant 0.1-10, curing agent 2-20 and solvent 400-1400. The recipe makes the magnetic bar possess the features of high hardness, high wear resistance, good heat resistance, high brightness, high antistatic performance, good flexibility and high tensile stability, as well as low material consumption, low cost and long service life.

The invention discloses a method for preparing a positive plate of a lithium-iron button battery. The method is capable of producing a high-energy and pollution-free lithium-iron button battery, and comprises the following steps of: placing an iron disulfide positive pole material which is pre-treated at high temperature into a ceramic ball mill for ball-milling, and sieving through a 150-mesh sieve; adding a sieved mixed material of iron disulfide and a conductive agent into the ceramic ball mill for the ball-milling in a mass ratio of 96:(1-3), and sieving through the 150-mesh sieve; adding the mixed material of the iron disulfide and the conductive agent into a stirring drum of a planetary stirrer, adding pre-prepared deionized water boiling at the temperature of 100 DEG C, adding a polytetrafluoroethylene (PTFE) solution, starting the planetary stirrer, continuously stirring, and separating slurry from the deionized water to form pasty slurry; taking the pasty slurry out from the stirring drum, and laying the pasty slurry in a porcelain dish; placing a positive pole material into the ceramic ball mill, and performing ball-milling through a ceramic milling ball with the diameter of 2 to 5cm; brushing the positive pole material into foamed nickel through a brush; and rolling the positive plate to obtain the positive plate of the lithium-iron button battery.

The invention discloses a cultural paper surface sizing agent. The raw material of the cultural paper surface sizing agent comprises the following main components in percentage by weight: 0.3 to 0.5 percent of carboxymethyl chitosan, 20 to 25 percent of zircon salt, 2 to 5 percent of acid solution and the balance of deionized water. In preparation, solution of carboxymethyl chitosan is prepared first by dissolving the carboxymethyl chitosan in the acid solution; then solution of zircon salt is prepared by dissolving the zircon salt in the deionized water; and finally, the solution of carboxymethyl chitosan is dripped into the solution of zircon salt slowly, the mixed solution is stirred uniformly, and thus, the cultural paper surface sizing agent is obtained. The paper made by using the cultural paper surface sizing agent of the invention is insusceptible to picking and duslting, low in cost and environmentally friendly.

The invention discloses a graphene-modified copper foil electrode used for a power battery with a silica-based cathode. The copper foil electrode includes a copper foil base body, and the copper foilbase body is sequentially provided with a graphene buffering layer and an active material layer; the graphene buffering layer is formed on the copper foil base body and forms a flow gathering layer along with the copper foil base body; the active material layer is a silica-based alloy cathode coating layer, and the silica-based alloy cathode coating layer includes compound ingredients including C,Si, GeP5 and GeS, wherein the mass ratio of the compound ingredients including C, Si, GeP5 and GeS is (1-10):(1-10):(1-10):(1-10). The graphene-modified copper foil electrode has the advantages thatthe contact area between the flow gathering layer and the active materials is enlarged, and electronic migration potential barriers and interface internal resistance are reduced; the compatibility andbonding strength between the active materials and flow gathering bodies are enhanced; the physical, chemical and electrochemical properties are stable, and the stability of copper foil under an electrochemical condition and the battery safety are improved.

The invention discloses a cutting device of a lithium battery pole piece. The cutting device of the lithium battery pole piece comprises a fixing cutter rest, a movable cutter rest and a driving device, wherein a pressing block, a first polished shaft, a first compression spring and a fixing cutter are arranged on the fixing cutter rest, the first compression spring sleeves the first polished shaft, the two ends of the first spring abut against the fixing cutter rest and the pressing block correspondingly, the side face, facing the pressing block, of the movable cutter on the movable cutter rest is an extrusion surface, and a cutting edge is arranged at the bottom of the extrusion surface; and a gap for the pole piece to pass is formed between the pressing block and the fixing cutter and amovable cutter, the driving device is used for controlling the movable cutter to move, when the movable cutter moves towards the direction of the pressing block until the pole piece is pressed on thepressing block through the extrusion face, the pole piece is cut off under the action of the cutting edge of the movable cutter and the fixing cutter. The movable cutter and the pressing block of anelastic structures can ensure that the pole piece is clamped without generating relative displacement, additionally, the shear type cutter point is formed between the cutting edge of the movable cutter and the fixing cutter, so that the cutting quality of the pole piece can be guaranteed while the pole piece can be effectively prevented from dusting.