Novel graphite resistor rod for aluminum foil corrosion of capacitor

A capacitor aluminum foil, graphite electrode technology, applied in capacitors, electrolytic capacitors, electrodes and other directions, can solve the problems of uneven lateral distribution of corrosion current density, deviation of corrosion current density, affecting the quality of anode aluminum foil, etc., to improve the uniformity of lateral current distribution , avoid the increase, improve the effect of the uniformity of capacitance distribution

Inactive Publication Date: 2009-05-06
DONGGUAN HEC CONDENSER CO LTD
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  • Claims
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Problems solved by technology

[0003] In the actual production of anode foil, a linkage production device is used, the aluminum foil is soaked in the corrosion bath, and a certain AC or DC is applied to corrode and expand the surface. The traditional graphite electrode for electrochemical corrosion is a single-piece graphite electrode, that is, a whole graphite Graphite electrodes made of graphite plates. Due to the large resistance of graphite and low corrosion voltage in production, the corrosion current density is unevenly distributed laterally. Small, due to uneven current distrib

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  • Novel graphite resistor rod for aluminum foil corrosion of capacitor
  • Novel graphite resistor rod for aluminum foil corrosion of capacitor
  • Novel graphite resistor rod for aluminum foil corrosion of capacitor

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Embodiment Construction

[0017] The present invention will be described in more detail below in conjunction with accompanying drawing:

[0018] See Figure 1-2 , a new type of graphite electrode for electrochemically corroding anode aluminum foil, consisting of a graphite pole plate 2, an insulating baffle 4 and two copper rods 1, one end of the two copper rods is inserted into the graphite pole plate 2 and fixed, and the other One end of the exposed graphite plate 2 is connected to the power supply wire. The exposed parts of the copper rod are all coated with insulating glue, and the contact between the copper rod and the wire is not coated with glue. The insulating baffle 4 is passed through the non-penetrating screw hole 3 with graphite bolts It is fixed together with the graphite pole plate 2 to form a group of electrodes for electrochemically expanding the surface of the capacitor anode aluminum foil.

[0019] See attached image 3 And attached Figure 4 , the abscissa is the distance from one...

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Abstract

The invention belongs to the technical field of graphite electrodes, in particular to a graphite electrode used by an aluminum electrolytic capacitor for electrochemical corrosion. The graphite electrode consists of a graphite polar plate, an insulated baffle plate and two copper bars. One end of each copper bar is inserted into the graphite polar plate and the other end of each cooper plate is connected with a power wire. The insulated baffle plate is fixed with the graphite polar plate through a graphite bolt and a non-through screw hole. Compared with the graphite electrode in the prior art, the graphite electrode has the advantages that the current in the electrode is uniformly distributed, lateral deviation of electrode foil is obviously lowered, and the self-corrosion of the electrode foil can not become more serious due to prevention of production of other metal elements that can pollute liquid in an etch bath.

Description

Technical field: [0001] The invention belongs to the technical field of graphite electrodes, in particular to a graphite electrode for electrochemical corrosion of aluminum electrolytic capacitors. Background technique: [0002] The electrodes of aluminum electrolytic capacitors are generally made of high-purity aluminum. The capacitance of the capacitor is proportional to the surface area of ​​the anode aluminum foil for the capacitor. The larger the surface area of ​​the anode aluminum foil, the greater the capacitance of the aluminum electrolytic capacitor. In this case, the less anode foil material used in the capacitor, the smaller the corresponding capacitor volume. In order to increase the surface area of ​​the anode aluminum foil, the usual method is to electrochemically corrode the aluminum foil to form a large number of small holes, thereby expanding the real surface area of ​​the aluminum foil. [0003] In the actual production of anode foil, a linkage production...

Claims

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Application Information

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IPC IPC(8): C25B11/12C25F3/04H01G9/055
Inventor 吴勇
Owner DONGGUAN HEC CONDENSER CO LTD
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