16 results about "Pole piece" patented technology

The invention provides a manufacturing method of a winding type lithium ion battery and the winding type lithium ion battery, and relates to the technical field of lithium ion batteries. The method comprises the following steps: punching a foil on one side of a positive pole piece and a foil on one side of a negative pole piece to be saw-toothed to form a saw-toothed positive pole piece and a saw-toothed negative pole piece; arranging an isolating film between the saw-toothed positive pole piece and the saw-toothed negative pole piece in a laminating mode for winding to form multiple layers of positive tabs and multiple layers of negative tabs. The battery comprises an outer composite aluminum plastic film and a multi-tab lithium ion cell, wherein the multi-tab lithium ion cell comprises the positive pole piece, the isolating film and the negative pole piece which are laminated and then wound; one side of the positive pole piece and one side of the negative pole piece adopt saw-toothed structures, and the positive pole piece and the negative pole piece are wound to form the multiple layers of positive tabs and the multiple layers of negative tabs. The production efficiency of a Z-shaped lamination battery is improved, the potential safety hazard of a Z-shaped lamination process in assembly is reduced, the internal resistance of the battery is reduced, and large current discharge is achieved.

The invention relates to a stator coil winding process which comprises the following steps of: bending a chip into a regular polygon chip, wherein pole pieces at the head and the tail of the regular polygon chip are connected and an opening of the regular polygon chip faces outwards; fixing the regular polygon chip on a coil winding machine and winding wires; and reversely bending the wound regular polygon chip into an annular iron core, wherein the chip opening of the annular iron core faces inwards. The chip of which the pole pieces are linearly arranged is selected and formed by punching, the pole pieces are I-shaped, the chip is at least formed by arranging three pole pieces, and a forked coil winding machine is selected as the coil winding machine. The stator coil winding process can not only be used for manufacturing a stator according with the requirement of a high-performance micro motor, but also can reduce the manufacturing cost of the stator and increase the production efficiency. In addition to being used for the coil winding of a micro motor stator, the process can be used for winding coils of a direct current brushless motor stator, a shaded pole motor stator or other small-size motor stators with similar structures.

The invention relates to the field of battery pole piece die cutting, in particular to an anti-spatter laser die-cutting device and method. The anti-spatter laser die-cutting device comprises a laser cutting unit, a pole piece conveying roller corresponding to the laser cutting unit, and a dust-proof unit mounted between the pole piece conveying roller and the laser cutting unit, wherein the laser cutting unit comprises a laser head, the dust-proof unit comprises a glass block plate, and the glass block plate is right opposite to the laser head, located between the laser head and the pole piece conveying roller and used for letting laser pass through and preventing dust from passing through. Dust generated in the die-cutting process is blocked by the glass block plate of the dust-proof unit and accordingly prevented from adhering to a pole piece; on one hand, the anti-spatter laser die-cutting device is good in dust-proof effect and beneficial to the improvement of the quality of the pole piece, and on the other hand, the die-cutting device is simple in structure and low in manufacturing cost.

The invention discloses a deviation rectifying system and method for a cutting and stacking all-in-one machine for rectifying deviation between an unwinding device and a cutting device of the cutting and stacking all-in-one machine. The deviation rectifying system comprises an unwinding deviation rectifying device, an advancing deviation rectifying device and a clamping deviation rectifying device which are sequentially arranged in the conveying direction of a material belt. The unwinding deviation rectifying device is used for rectifying deviation of the feeding position of the material belt and conveying the material belt to the advancing deviation rectifying device. The advancing deviation rectifying device is used for rectifying deviation of the material belt conveyed by the unwinding deviation rectifying device and conveying the material belt to the clamping deviation rectifying device. The clamping deviation rectifying device is used for rectifying deviation of the material belt conveyed by the advancing deviation rectifying device and conveying the material belt to the cutting device. Thus, through the mode of three times of deviation rectifying, the deviation rectifying precision of the material belt can be improved, the deviation offset of the material belt in the direction perpendicular to the conveying direction of the material belt in the material belt conveying process is further reduced, the precision of a pole piece cut by the cutting device is guaranteed, and then the quality of a finished product laminated lithium battery is improved.

The invention discloses a lamination tabling type stator which is formed by tabling a plurality of pole shoe modules of independently wound coils with a magnetic conductor provided with a center hole in a radial mode, wherein each pole shoe module is formed by alternately laminating and riveting long and short pole shoe punched sheets; the magnetic conductor is formed by alternately laminating a plurality of magnetic conducting ring cut sheets, which are arranged circumferentially and annularly at intervals, together with magnetic conducting ring punched sheets; inlaying gaps which have complementary shapes and are in same number with shoe feet of all the pole shoe modules are formed between adjacent magnetic conducting ring cut sheets of each layer of the magnetic conductor; and the poleshoe modules and the magnetic conductor are fixedly connected into a whole after being inlaid together. The invention also provides a manufacturing method of the lamination tabling type stator, and the method is low in winding process requirement, high in winding speed and easy in assembly. According to the manufacturing method of the stator structure and formation, the pole shoe modules are convenient in winding operation outside the stator, the winding process requirement is reduced, multi-head neck-and-neck winding of the pole shoe modules is realized, the winding productivity in unit timeis high, the winding cost is low, the winding slot fullness is high, the motor efficiency is improved, the pole shoe modules are inserted in the magnetic conductor after being subjected to winding, the assembly is easy to implement, and the working efficiency is high.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a pole piece for a button battery. The pole piece comprises a current collector including a coating area and an empty foil area which are adjacently arranged, an active substance layer and a tab, wherein the empty foil area is provided with unfoldable wrinkles; the active substance layer is arranged on at least one surface of the coating area; and the tab is connected with the empty foil area. According to the invention, the current collector empty foil area is provided with the unfoldable wrinkles so that in the charging expansion process of a roll core of the button battery, the wrinkles of the current collector empty foil area of the outermost layer pole piece of the roll core have a certain extension space, and the outermost layer pole piece of the roll core can be prevented from being broken due to a pulling stress; and the reject ratio of a large internal resistance and the reject ratio of a zero voltage are also reduced.

The invention relates to a preparation method of nano-scale manganese lithium phosphate. The preparation method comprises the following steps: (S1) preparing manganese sesquioxide saturated choline chloride ionic liquid; (S2) preparing an aluminum-net-base lithium phosphate pole piece; and (S3) carrying out electro-depositionin the sesquioxide saturated choline chloride ionic liquid by taking the aluminum-net-base lithium phosphate pole piece as a cathode, so as to grow nano-scale manganese lithium phosphate on the cathode. The particle size of nano-scale manganese lithium phosphate prepared by virtue of the choline chloride ionic liquid is relatively uniform, the preparation process is environment-friendly, the technology is simple, and the preparation process is easily controlled.

The invention discloses a stator assembly and an axial magnetic field motor. The stator assembly comprises a housing, a stator core, a coil, a pole shoe, and a stator cover plate, wherein the stator core, the coil, and the pole shoe are disposed in a space formed by the housing and the stator cover plate. The coil is arranged in an open slot of the stator core; and the pole shoe is fixed on the stator cover plate, and when the stator cover plate is in butt joint with the housing, the pole shoe can be arranged at the notch of the open slot. The stator iron core is provided with the open slot, so that the coil is convenient to install, meanwhile, the pole shoe is fixed on the stator cover plate, and when the stator cover plate is in butt joint with the housing, the pole shoe corresponds to the notch of the open slot, so that the tooth harmonic of the motor can be reduced, the iron loss of the motor is reduced, the efficiency of the motor is improved, and the torque pulsation of the motoris reduced; and the pole shoe is borne on the stator cover plate, and the pole shoe can be matched with the open slot after the stator cover plate and the housing are directly butted during assembly,so that the production efficiency of the motor is improved.

The invention discloses a lithium battery pole piece transportation device which is characterized by comprising a trough body, wherein the trough body is provided with an object-carrying platform, and the edge position of the object-carrying platform is provided with a capped edge; furthermore, a rotating device is arranged between the object-carrying platform and the trough body; the rotating device comprises a multifunctional rotating shaft, the multifunctional rotating shaft is fixedly arranged on the trough body, and the top end of the rotating shaft is connected with the object-carrying platform; the bottom of the object-carrying platform is provided with a plurality of pulleys; and the pulleys of the object-carrying platform are arranged on both sides of the multifunctional rotating shaft. According to the invention, lithium battery pole pieces are placed on the object-carrying platform, and the capped edge fixes the lithium battery pole pieces, thereby preventing the shifting of the lithium battery pole pieces in the process of transportation; and the pulleys are arranged in the trough body, and the front and rear positions of lithium batteries in the process of placing are electrically controlled. The lithium battery pole piece transportation device disclosed by the invention is simple and efficient in structure, and can overcome the defects that lithium battery pole pieces are easy to be collided and the quality is difficult to ensure when lithium battery pole pieces are manually transported at present.

The invention discloses a photoelectrochemical sensing device and method for analyzing m5C and m6A in RNA, the photoelectrochemical sensing device comprises a supporting assembly, a sealing assembly, a glass detection box, an upper cover, a photoelectrochemical sensor and a pole piece. The sensing method comprises the following steps: step 1, equipment connection; step 2, detection preparation; step 3, detecting and recording. Through cooperation of a limiting shaft, a first reset spring, a trapezoidal groove and a push block in the supporting assembly, the stability of the photoelectrochemical sensing device during use is guaranteed, meanwhile, the height of the electrochemical sensing device can be adjusted, and use is convenient; a first gear, a second reset spring, an ejector rod, a pawl, a spring piece, a second gear, a torsion spring, a sealing belt and a second limiting groove in the sealing assembly are matched to form a sealing structure, so that the sealing performance of the electrochemical sensing device in use is conveniently ensured, and the influence of an external environment on detection is reduced; the method is simple, comprehensive and convenient to popularize and use.

The invention relates to a lithium battery pole piece rolling mill pump control roll bending hydraulic system and a roll bending device. Roll bending cylinders are arranged at the left and right endsof upper and lower bearing seats of the roll bending device, a set of pump control roll bending hydraulic system is arranged on the outer side of each roll bending cylinder, and a roll bending pressure instruction is given to a controller; and the controller outputs a rotating speed signal to control a servo motor to drive a two-way constant displacement pump to rotate to build up pressure, a first oil port of the two-way constant displacement pump sucks oil from rodless cavities of the roll bending cylinders through a low-pressure hole channel and a low-pressure pipeline, and a second oil port of the two-way constant displacement pump presses oil to rod cavities of the roll bending cylinders through a high-pressure hole channel and a high-pressure pipeline. Hydraulic roll bending force generated by the roll bending cylinders enables a roll to generate additional bending so as to compensate for roll gap transverse spacing deviation and improve the consistency of the pole piece rollingthickness. High-precision rolling of battery pole pieces can be achieved, the installation, operation and maintenance cost of the system is reduced, the power-to-weight ratio is increased, and the reliability is improved.

The invention relates to an automatic winding machine for a micro battery. The machine comprises a pole piece supply mechanism, diaphragm supply mechanisms, a winding mechanism, a product discharge mechanism and a support frame, and is characterized in that the pole piece supply mechanism comprises a positive pole piece supply unit and a negative pole piece supply unit with the same structure; thepositive piece supply unit and the negative piece supply unit are arranged on the two sides of the winding mechanism respectively and input positive pieces and negative pieces to the winding mechanism respectively, and one group of diaphragm supply mechanisms are arranged on one side of the positive piece supply unit and inputs diaphragms to the winding mechanism. The other group of diaphragm supply mechanisms are arranged on one side of the negative piece supply unit and inputs diaphragms to the winding mechanism; and the product discharge mechanism is arranged at the winding output end of the winding mechanism. According to the automatic winding machine for the micro battery, the positive piece supply unit and the negative piece supply unit are used for directly feeding the pole piece on which the tab is pressed into the winding mechanism for winding, automatic operation is achieved, and the operation precision and the operation efficiency can be better controlled.