478results about "Capacitor electrodes" patented technology

The invention relates to an electrode preparation method, an electrode prepared by the method, an energy storage device comprising the electrode and an electrode production system for carrying out the method. The preparation method comprises the following steps: (a) providing a self-supporting electrode film which comprises a first side and a second side opposite to the first side, and the second side comprises a to-be-deposited area on which metal is deposited when the self-supporting electrode film is in contact with an electrolyte for an electrodeposition reaction; (b) providing an electrolyte containing a salt of a metal to be deposited; and (c) contacting at least the region to be deposited of the second side of the self-supporting electrode film with the electrolyte, and performing an electrodeposition reaction in the region to be deposited, thereby depositing a current collector of the metal to be deposited on the second side, where the electrodeposition temperature is 0 to 70 DEG C. According to the electrode prepared by the method disclosed by the invention, the active substance in the electrode has excellent first discharge specific capacity, first coulombic efficiency and cycle performance.

An electrolytic capacitor includes a winding portion, an anode lead member, and a cathode lead member. The winding portion includes an anode foil and a cathode foil that are wound. The anode lead member is connected to the anode foil and extends in a first direction. The cathode lead member is connected to the cathode foil and extends in the first direction. The winding portion has a shape viewed in the first direction, the shape including a first peripheral region and a second peripheral region that are opposed to each other in a second direction intersecting the first direction, and a third peripheral region and a fourth peripheral region that are opposed to each other in a third direction intersecting the first direction and the second direction. The length of the winding portion in the third direction is larger than the length of the winding portion in the second direction. The anode lead member and the cathode lead member are arranged point-symmetrically with respect to a center of the winding portion when viewed in the first direction.

A capacitor that is capable of exhibiting good electrical properties under a wide variety of different conditions is provided. The capacitor contains a capacitor element that includes a sintered porous anode body, a dielectric that overlies the anode body, and a solid electrolyte that overlies the dielectric and includes a conductive polymer. The capacitor also contains multiple exposed anode lead portions that are electrically connected to respective anode terminations and a planar cathode termination that is electrically connected to the solid electrolyte.

To provide a thin film capacitor having high adhesion with respect to a circuit substrate. A thin film capacitor includes: a metal foil having a roughened upper surface; a dielectric film covering the upper surface of the metal foil and having an opening through which the metal foil is partly exposed; a first electrode layer contacting the metal foil through the opening; and a second electrode layer contacting the dielectric film without contacting the metal foil. An angle θa formed by the other main surface of the metal foil and a side surface thereof is more than 20° and less than 80°. The side surface is thus tapered at an angle of more than 20° and less than 80°, so that it is possible to suppress warpage and to enhance adhesion with respect to a multilayer substrate when the thin film capacitor is embedded in the multilayer substrate.

To provide a thin film capacitor in which warpage is less likely to occur. A thin film capacitor includes: a metal foil having roughened upper and lower surfaces; a dielectric film covering the upper surface of the metal foil and having an opening through which the metal foil is partly exposed; a dielectric film covering the lower surface of the metal foil and made of a dielectric material having a thermal expansion coefficient smaller than that of the metal foil; a first electrode layer contacting the metal foil through the opening; and a second electrode layer contacting the first dielectric film without contacting the metal foil. The lower surface of the metal foil is thus covered with the dielectric film having a small thermal expansion coefficient, thereby making it possible to prevent the occurrence of warpage.

The present invention discloses a negative pressure packaging method for aluminum electrolytic capacitors, comprising: inserting a core into a sealing body. Placing the core, the sealing body and the outer shell in the inner cavity of a receiving mechanism, and sealing the receiving mechanism. Evacuating the inner cavity of the receiving mechanism so that the inner cavity of the receiving mechanism is in a negative pressure state. The sealing body and the outer shell are packaged so that the sealing body is located at a first depth of the outer shell. The sealing body and the outer shell are pressed together so that the sealing body is located at a second depth of the outer shell, and the second depth is closer to the bottom of the outer shell relative to the first depth. The method solves the problem of the sealing body sliding too long on the inner wall of the outer shell in the prior art, avoids overheating of the friction surface of the sealing body and slight melting, and can ensure that the outer diameter of the sealing body will not shrink, thereby ensuring the airtightness of the outer shell and the sealing body, realizing the negative pressure packaging of the aluminum electrolytic capacitor, improving the stability of the product and increasing the service life of the product.

The invention discloses an aluminum electrolytic capacitor special for an electric tool and a preparation method of the aluminum electrolytic capacitor. The method comprises the following steps that a positive electrode guide pin and a negative electrode guide pin are riveted to an anode foil and a cathode foil respectively; placing electrolytic paper between the anode foil and the cathode foil, and winding to form a core package; carrying out baking drying and electrolyte impregnation treatment on the wound core package, and then carrying out packaging and aging; the electrolyte consists of the following components in percentage by mass: 45-60% of a solvent, 25-40% of a solute, 5-15% of an additive and 5-10% of a stabilizer, the solute contains 2-butyl suberic acid; the stabilizer contains alkyl phosphate. According to the preparation method of the aluminum electrolytic capacitor special for the electric tool, the electrolyte formula is optimized, oxidation hydrolysis of the electrode foil and the oxidation film is effectively inhibited, the ion migration resistance is reduced, the polarization phenomenon is reduced, the loss value and the equivalent series resistance (ESR) of the obtained capacitor are remarkably reduced, the ripple resistance is improved, and the aluminum electrolytic capacitor is suitable for the electric tool.

The invention relates to a formation process of a formed foil for an aluminum electrolytic capacitor. Sequentially carrying out primary hydration treatment, primary heat treatment and secondary hydration treatment on the etched foil, and immersing the etched foil in a reaction matrix solution of an aluminum-based metal organic framework for pretreatment; performing four-stage medium-high voltage electroforming to densify the porous oxide film on the surface of the etched foil to form a compact crystalline oxide film; and carrying out secondary heat treatment, depolarization treatment and repair formation to finally prepare the medium-high voltage formed foil with excellent performance. Sintering heat treatment is added in pretreatment, so that internal defects of crystallized hydrated oxide expand under heating; an aluminum matrix metal organic framework is added for pretreatment before electric formation, and the MOFs material grows in situ in a crystalline oxide film on the surface of a medium-high voltage formed foil precursor, so that a positive effect on the total pore volume of the formed foil can be achieved, the electrostatic capacity is further improved, and meanwhile, the performance stability of the formed foil is improved.

A tantalum capacitor includes a tantalum body including a tantalum element including tantalum powder, a conductive polymer layer disposed on the tantalum element, and a tantalum wire penetrating through at least a portion of each of the tantalum element and the conductive polymer layer in a first direction, a molded portion including a fifth surface and a sixth surface facing in the first direction, a third surface and a fourth surface facing in a second direction, and a first surface and a second surface facing in a third direction and surrounding the tantalum body, a first coating layer disposed in at least a portion of an interface between the tantalum body and the molded portion, and a second coating layer disposed on the first coating layer, wherein the second coating layer is thicker than the first coating layer.

A capacitor header for coupling a voltage output from a capacitor, which allows the capacitor to store a large amount of charge and then discharge this as a high voltage, while reducing the risk of dielectric breakdown. The capacitor header includes a live output plate connected to a central live conductor of the capacitor and a ground output plate connected to a ground conductor of the capacitor. The capacitor header also includes first and second insulating members, which both have non-planar mating surfaces that interleave to form a non-linear path. An insulating seal is included between the non-planar mating surfaces. The capacitor header also includes two sets of insulating sheets. The sets of insulating sheets extend beyond an outer perimeter of the live output plate and the ground output plate.

The present invention relates to the technical field of manufacturing solid aluminum electrolytic capacitors, and specifically discloses a moisture-resistant laminated solid aluminum electrolytic capacitor and a manufacturing method, including a shell and a cover, wherein the inner side of the shell is provided with positive contacts and negative contacts that are staggered and distributed at equal intervals, the inner side of the shell is provided with two symmetrically distributed arc strips, the bottom of the arc strip is fixedly connected with two symmetrically distributed conductive strips, the inner side of the conductive strip is fixedly connected with U-shaped card slots that are distributed at equal intervals in a straight line, and the outer side of the positive contact and the outer side of the negative contact are respectively provided with positive conductive sheets and negative conductive sheets. The present invention arranges two conductive sheets on the outer side of the positive contact and the negative contact, and if one group of conductive sheets and the U-shaped card slot appear, the other group of conductive sheets and the U-shaped card slot can still be used normally, so that the entire capacitor can continue to be used, thereby improving the service life of the laminated solid aluminum electrolytic capacitor.

A solid electrolytic capacitor includes: a capacitor element including an anode part and a cathode part; a substrate that supports the capacitor element; a sealing body that seals the capacitor element; a first external electrode electrically connected to the anode part; a second external electrode electrically connected to the cathode part; and an adhesive layer disposed between the capacitor element and a first surface of the substrate. At an interface between the first surface and the adhesive layer, a maximum height Rz1 of surface roughness of the first surface is 5 μm or more, and a maximum height Rz2 of surface roughness of the adhesive layer is 3 μm or more.

A method for producing an electrolytic capacitor, the method including steps of: preparing an electrode foil; preparing a first conductive polymer dispersion containing a first conductive polymer component and a first dispersion medium; forming a first conductive polymer layer containing the first conductive polymer component, by applying the first conductive polymer dispersion to a surface of the electrode foil by a coating method, and then at least partially removing the first dispersion medium; and fabricating a capacitor element, using the electrode foil having the first conductive polymer layer.

A tantalum capacitor includes a tantalum body including a tantalum element including tantalum powder, and a tantalum wire passing through at least a portion of the tantalum element in a first direction, a molded portion having fifth and sixth surfaces opposing each other in the first direction, third and fourth surfaces opposing each other in a second direction, first and second surfaces opposing each other in a third direction, the molded portion formed to surround the tantalum body, an anode lead frame connected to the tantalum wire, a cathode lead frame spaced apart from the anode lead frame, the cathode lead frame connected to the tantalum body, and a frame terminal disposed on the anode lead frame and the cathode lead frame to be spaced apart from the second surface of the molded portion.

The invention discloses an aluminum electrolytic capacitor foil prepared from porous aluminum powder, which is a three-dimensional porous aluminum electrode foil, the three-dimensional porous aluminum electrode foil is formed by high-temperature sintering of a foil material consisting of a base layer aluminum foil and a mixture coated on the surface of the base layer aluminum foil, and the mixture is formed by uniformly mixing large-particle porous aluminum powder, small-particle aluminum powder, a binder and a solvent. The invention also discloses a preparation method of the aluminum electrolytic capacitor foil prepared from the porous aluminum powder, which comprises the following steps: S1, stirring the large-particle aluminum powder, 3-30% of hydrogen peroxide and 1-10% of sodium hydroxide solution at the constant temperature of 35-55 DEG C to react, filtering, washing and drying to obtain the large-particle porous aluminum powder; s2, uniformly mixing the large-particle porous aluminum powder, the small-particle porous aluminum powder, the binder and the solvent, coating the surface of the base layer aluminum foil with the mixture, and drying and curing; and S3, sintering the heated and cured foil at high temperature to form the three-dimensional porous aluminum electrode foil. The specific surface area of the powder can be increased through aluminum powder pore forming, and improvement of the foil capacity is facilitated.

The invention relates to an ultra-thin solid aluminum electrolytic capacitor, which comprises a shell and an element cover body, an opening is formed in one side of the shell, and a flanging clamping protrusion is arranged at the opening. The cover body and the opening are embedded into a whole through injection molding to package the element in the shell; the cover body comprises a base plate, an inner plug and a side sealing wall; a side sealing wall and an inner plug are vertically arranged on the upper end face of the base plate. The inner plug is positioned inside the side sealing wall; a gap between the outer peripheral wall of the inner plug and the inner peripheral wall of the side sealing wall forms a groove part; the groove part is tightly combined with the opening inner and outer structures; two lead holes penetrating through the cover body are symmetrically formed in the end face of the inner plug. The cover body and the opening structure of the shell are integrally packaged through injection molding and embedding, and the cover body can still meet the heat resistance and shock resistance conditions under the condition that the thickness is reduced, so that the solid aluminum electrolytic capacitor applying the cover body can still have relatively high heat resistance and shock resistance while breaking through the product thinness limit; and the ultra-thin effect of the solid aluminum electrolytic capacitor is realized.

The invention provides a lightweight flexible composite micro-energy storage module, which comprises a flexible substrate, a composite electrode layer, a solid electrolyte layer and a packaging layer, and is characterized in that the flexible substrate is made of a polyurethane-graphene composite material, the thickness of the flexible substrate is 50-200 [mu] m, and the surface of the flexible substrate is provided with a micro-crack structure; the composite electrode layer is formed by alternately stacking MXene / silicon carbon composite nanosheets and polypyrrole conductive polymers, wherein the mass ratio of MXene to silicon carbon is 3: 1 to 5: 1. According to the invention, through the mechanical interlocking design of the microcrack structure of the flexible substrate and the composite electrode layer, the interlayer binding force is significantly enhanced, and the structural integrity under dynamic bending is improved; the root-shaped ion transmission channel of the solid electrolyte layer and the vertical orientation transition layer realize electron-ion dual-channel cooperative transmission and reduce the interface impedance; the gradient hydrophobic structure of the packaging layer is matched with mechanics through chemical bonding, the sealing performance, the flexibility and the environmental tolerance are balanced, and the service life of the module is prolonged.

This invention discloses a surface-mount solid aluminum electrolytic capacitor and its manufacturing method, comprising a capacitor core package, which includes N capacitor cores, N+1 conductive metal meshes, a substrate, anode leads, cathode leads, and a silver paste covering tape. The capacitor core package is encapsulated and electroplated to form a solid aluminum electrolytic capacitor. The capacitor core includes an anode portion, a cathode portion, and an insulating barrier tape. In this invention, the conductive metal mesh sandwiched between the metal pads in the anode portion of the capacitor core and the cathode portion of the capacitor core can achieve the flatness of the core package. The silver paste covering tape located on the side of the cathode portion of the core package is embedded in the gap formed between two adjacent capacitor cores due to the conductive metal mesh sandwiched, forming an integrated connection. This prevents the resin encapsulant from being squeezed into the core layers during encapsulation, preventing core deformation damage that could lead to increased leakage current and increased ESR. Furthermore, it can prevent insufficient capacitance or even capacitor failure caused by delamination between cores.

The invention relates to the technical field of preparation of tantalum capacitor cathode plates, in particular to a preparation device and method of a high-performance tantalum electrolytic capacitor cathode plate, and mainly comprises a support, impregnation spin-drying rollers are symmetrically arranged on the support, and a first conveying belt and a second conveying belt are respectively arranged between the impregnation spin-drying rollers. Tantalum capacitor workpieces are placed on the first conveying belt and the second conveying belt, synchronous rods in the separation mechanism are distributed in a high-low staggered mode, the synchronous rods on the two sides of the tantalum capacitor workpieces ascend and descend in a staggered mode, and the tantalum capacitor workpieces are effectively separated in a reciprocating mode. And the position of the moving block is adjusted through a bidirectional lead screw in the adjusting mechanism, so that cylindrical tantalum capacitor workpieces of different models are adapted.

An electrode foil for an electrolytic capacitor includes: an anode body that includes a core part and a porous part disposed on a surface of the core part, and contains a first metal; a first dielectric layer that covers at least a part of the porous part; and a second dielectric layer that covers at least a part of the first dielectric layer. The second dielectric layer contains an oxide of a second metal. The first dielectric layer includes a first part having a thickness T1 and a second part having a thickness T2 smaller than the thickness T1.

The invention belongs to the technical field of aluminum electrolytic capacitors, and particularly relates to a preparation method of an anode foil of an aluminum electrolytic capacitor. The invention provides a method for preparing an anode foil of an aluminum electrolytic capacitor, which comprises the following steps of: providing aluminum paste which comprises aluminum powder, a binder, a pore-forming agent and an organic solvent; and coating two sides of an aluminum foil with the aluminum paste, and sequentially drying and sintering to obtain the aluminum electrolytic capacitor anode foil. According to the method, the pore-forming agent is added into the aluminum paste, after sintering is completed, due to the fact that the pore-forming agent is added, more large holes are formed in the obtained anode foil, stress is reduced when the anode foil is bent or stressed, and therefore the anti-bending performance of the anode foil is greatly improved. And the larger the diameter of the hole is, the better the anti-bending effect is. The preparation method provided by the invention is simple and suitable for industrial production.

An electrolytic capacitor includes a capacitor element including an anode part and a cathode part, an exterior body sealing the capacitor element, a first external electrode electrically connected to the anode part and exposed from the exterior body, a second external electrode electrically connected to the cathode part and exposed from the exterior body, and a first base electrode connecting the anode part and the first external electrode. The first base electrode contains a first sintered metal, and the first sintered metal is in contact with an end surface of the anode part not covered with the exterior body and is in contact with the first external electrode. A relation 0.5≤W1 / Tpc≤100 is satisfied, where Wp represents a width of the end surface of the anode part, and Tpc represents a thickness of the first sintered metal at a center of the width Wp.

The invention discloses a device and a method for preparing tantalum powder by reducing gaseous magnesium, and solves the problems of high oxygen content, poor particle uniformity, incomplete reaction and the like in the prior art. The device adopts a vertical multi-layer reaction furnace structure, and realizes efficient reduction of tantalum oxide through heating of a resistance wire and reaction with gaseous magnesium. The method comprises gaseous magnesium reduction and product post-treatment. The oxygen content of the tantalum powder prepared through the method is controlled to be 3000-6000 ppm, the specific volume reaches 80000-100000 mu F.V / g, the apparent density ranges from 1.5 g / cm < 3 > to 1.8 g / cm < 3 >, particle size distribution is uniform, and the method is suitable for large-scale production of electronic-grade tantalum powder.

The invention discloses a chip solid electrolyte tantalum capacitor capable of ensuring moisture resistance and a preparation method thereof, and belongs to the field of capacitor preparation. The tantalum capacitor comprises a tantalum anode, a dielectric layer, a solid electrolyte layer, a graphite silver paste layer, a hydrophobic moisture-proof layer, an epoxy resin shell, a lead frame, a positive lead and a negative lead. Wherein the tantalum anode is sequentially coated with the dielectric layer, the solid electrolyte layer and the graphite silver paste layer from inside to outside; the graphite silver paste layer is adhered to the lead frame through a conductive adhesive to lead out an anode lead and a cathode lead; the graphite silver paste layer is coated with a hydrophobic moisture-proof layer; and the hydrophobic moisture-proof layer is coated and packaged with an epoxy resin shell. According to the tantalum capacitor, the graphite silver paste layer is coated with the specific hydrophobic moisture-proof layer, so that the moisture-proof performance of the chip-type solid electrolyte tantalum capacitor is effectively improved on the premise that the preparation process difficulty, cost and finished product volume are not increased, and the chip-type solid electrolyte tantalum capacitor is suitable for being used in a high-temperature and high-humidity environment; and the product performance is ensured.

A solid electrolytic capacitor includes a laminate in which capacitor elements each including an anode foil, and cathode foils are laminated, an exterior resin covering the laminate and having a first end face on which a part of each anode foil is exposed and a second end face on which a part of each cathode foil is exposed, an anode external electrode electrically connected to each anode foil at the first end face, and a cathode external electrode electrically connected to each cathode foil at the second end face. A first average distance from an end point on the second end face to the respective cathode foils in the lamination direction on the mounting surface side of the exterior resin is smaller than a second average distance from the end point to the respective cathode foils in a region where the capacitor elements and the cathode foils overlap.

Disclosed is a capacitor element including: an anode body; a dielectric layer; and a cathode portion that includes a solid electrolyte layer and a cathode lead-out layer. The solid electrolyte layer contains an ionic liquid, and includes a first solid electrolyte and a second solid electrolyte layer. The first solid electrolyte contains a self-doped conductive polymer. The second solid electrolyte layer includes: a solid electrolyte 2A; a solid electrolyte 2B; and a solid electrolyte 2C. Out of a first interface between the first solid electrolyte and the solid electrolyte 2A, a second interface between the solid electrolyte 2A and the solid electrolyte 2B, a third interface between the solid electrolyte 2B and the solid electrolyte 2C, and a fourth interface between the solid electrolyte 2C and the cathode lead-out layer, the second interface or the third interface has a largest distribution amount of the ionic liquid.

The invention discloses a chip conducting polymer tantalum capacitor with stable leakage current and a preparation method thereof, and belongs to the field of capacitors. The method comprises the following steps: coating the surface of the dielectric layer with the pretreatment layer to enhance the adhesive force between the dielectric layer and the water-retaining conductive polymer cathode layer; the pretreatment layer is sequentially coated with a water-retaining inner layer containing a water-retaining additive, a transition layer and an outer layer to form a water-retaining conductive polymer cathode layer, and the adhesive force between sub-layers of the outer layer is improved through a cross-linking agent; the end face of the tantalum anode core leading out the tantalum wire is coated with an insulating protection layer; a graphite layer and a silver paste layer are coated, and two electrodes are led out through a lead frame; and adding a barrier layer on the surface of the tantalum capacitor core group and molding and packaging a shell to prepare the tantalum capacitor. Water vapor in the polymer tantalum capacitor prepared by the method is stabilized at a certain level and is slightly influenced along with temperature change, and the direct current leakage current level of the capacitor is improved.

The invention belongs to the technical field of capacitor electrode foil manufacturing, and discloses a capacitor formed foil multi-stage oxidation treatment device and a capacitor formed foil multi-stage oxidation treatment process, the device comprises multi-stage formation tanks which are arranged in sequence, cleaning mechanisms are arranged among the multi-stage formation tanks, the device further comprises a transmission mechanism used for transmitting formed foil, and the transmission mechanism comprises transmission rollers. The transmission rollers are arranged in an up-and-down staggered mode, and the formed foil sequentially penetrates through the transmission rollers; the head end of the formed foil is wound around the driving roller, and the driving roller is used for winding and tightening the formed foil; the inclining assembly is used for inclining the transmission roller and the driving roller; according to the scheme, the transmission roller and the driving roller drive formed foil to incline through the inclination assembly, so that water and formed liquid flow from high to low and are prevented from being accumulated on the two sides of the transmission roller; the problem that water accumulates on the two sides of a transmission roller in an existing formed foil cleaning device is solved.

The invention belongs to the technical field of electronic materials, and particularly relates to a high-performance sintered foil matched with multi-particle-size aluminum powder for industrial production and a preparation method of the high-performance sintered foil. In order to solve the problem that an existing sintered foil cannot obtain high bending performance and high specific capacitance performance at the same time, a multi-particle-size aluminum powder gradient matching strategy is adopted, the aluminum foil is prepared through slurry preparation, slurry stirring, double-face coating and drying integrated operation, sintering and formation treatment, the specific capacitance of the sintered foil after standardization is 0.8-1.2 mu F / cm, and the specific capacitance of the aluminum foil is 0.8-1.2 mu F / cm. The specific capacitance fluctuation range is smaller than or equal to 8%, the bending frequency is 40-100 times after a 90-degree bending test, the bent film layer is free of cracking and falling off, the leakage current is smaller than or equal to 3 [mu] A / cm < 2 > under the 25 DEG C and rated voltage test, and the film can be directly used for industrial production.

To facilitate equipping of a bus bar or an electronic component and suppress the noise resistance or the inductance.SOLUTION: A module 2 includes a folder 6 having component arranging units 16-1 and 16-2 and a bus bar 7 in at least one side part or both side parts of a bus bar arranging unit 18. The module 2 includes: a bus bar 7 (a positive bus bar 8 and a negative bus bar 10) in which a positive electrode bus bar piece (a positive electrode part 40) and a negative electrode bus bar piece (a negative electrode part 42) are alternately arranged and are exposed in the bus bar arranging unit 18; and a plurality of electronic components 4 arranged in the component arranging unit.SELECTED DRAWING: Figure 1