Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
  • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
  • H01G9/004—Details
  • H01G9/08—Housing; Encapsulation
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
  • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
  • H01G9/0029—Processes of manufacture
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
  • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
  • H01G9/004—Details
  • H01G9/04—Electrodes or formation of dielectric layers thereon
  • H01G9/06—Mounting in containers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
  • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
  • H01G9/15—Solid electrolytic capacitors
  • H01G9/151—Solid electrolytic capacitors with wound foil electrodes

Definitions

• the invention relates to an electrolytic capacitor module according to the preamble of claim 1, a method for its preparation according to claim 4 or 5, as well as a
• control unit in the transmission makes high demands on its thermal and mechanical strength.
• the functionality must be ensured over a wide temperature range (about -40 ° C to 150 ° C) as well as extreme mechanical vibrations (up to 40g).
• An electrolytic capacitor is a polarized capacitor consisting of two pads as capacitor plates and a dielectric located therebetween.
• a covering is a metal foil, in particular an aluminum foil, and forms the anode.
• the other coating is the electrolyte, an electrically conductive liquid on an absorbent material, and forms the cathode.
• the dielectric between the pads is a thin oxide layer located on the surface of the metal foil.
• For contacting the electrolytic layer is another aluminum foil.
• Electrolytic capacitors are wound capacitors, which are especially in cup form with radial (both connections on one end side) and axial connection wires (one connection per end side).
• Solder connection wires of the electrolytic capacitor and, for example, a circuit board outside the capacitor are soldered to the electrolytic capacitor.
• connection wire is arranged on each cover, or both connection wires are arranged on a cover.
• the connecting wires are electrically connected to the winding, for example, welded. With strong vibrations there is a risk that the winding can move relative to the surrounding cup. In the worst case, thereby solves the electrical connection between the winding and the leads inside the electrolytic capacitor. This also leads to failure of the electrolytic capacitor.
• the capacitor cup of the electrolytic capacitor has at least one opening, wherein in the interior of the electrolytic capacitor, the space between the inner wall of the capacitor cup and the winding of the
• Electrolytic capacitor is at least partially filled with casting material. This prevents the capacitor winding from moving relative to the surrounding capacitor cup, and prevents the electrical connection between the coil and the coil
• the electrolytic capacitor is arranged in a chamber of the electrolytic capacitor module such that the electrolytic capacitor is surrounded on its outer side in the region of the chamber at least partially with the same casting compound as the winding in the interior of the electrolytic capacitor. This prevents that at the occurring vibrations, eg. B. caused by rapidly rotating parts in the engine or transmission, the electrical connections between the connecting wires of the
• the opening of the condenser cup can be designed as a slot or as a substantially circular opening depending on the application. It can also be arranged a plurality of openings in the condenser cup, wherein then preferably serves as an inlet opening and a vent opening, and in particular the vent opening is higher relative to the filling level of the casting material in the chamber of the module than the inlet opening.
• the chamber of the electrolytic capacitor module via
• the vias may optionally be disposed on the inner or outer surface of the chamber.
• Another object of the present invention is to provide a method of manufacturing an electrolytic capacitor module according to any one of claims 1 to 3.
• the method according to the invention comprises the steps:
• a carrier plate comprising a chamber, and a
• the casting material is first introduced into the chamber of the casting material
• Electrolytic capacitor module poured, the electrolytic capacitor inserted into the chamber and then the connecting wires of the electrolytic capacitor with the
• This alternative method has the advantage that the filling level of the casting compound in the chamber can be better controlled.
• Capacitor cup can move, and solves the electrical connection between the winding and the connecting wires under vibration load.
• the electrolytic capacitor module is vorzugswese installed in motor vehicle control units, wherein the support plate of the electrolytic capacitor module with the housing of the
• Control device positively or non-positively, for example by means of a screw or a rivet, is connected.
• 2b shows an electrolytic capacitor with circular openings
• Fig. 3 is a section through the electrolytic capacitor module and a
• Fig. 1 shows an electrolytic capacitor module 1 for installation in a housing 2 of a motor vehicle control unit, in particular a so-called. Suburban control unit.
• Electrolytic capacitor module 1 essentially comprises a cylindrical
• Electrolytic capacitor 4 with a capacitor cup 5 and a support plate 3 with a chamber 6, which is filled with a curable casting compound 8.
• the electrolytic capacitor 4 is arranged in the chamber 6 such that it is at least partially surrounded on its outer side in the region of the chamber 6 with the casting compound 12.
• the connecting wires 15, 16 of the electrolytic capacitor 4 are electrically connected to plated-through holes 13, 14, which are integrated here in a wall of the chamber 6, for example, welded or soldered. As a result, an electrical connection between connecting wires 15, 16 of the electrolytic capacitor 4 and components outside of the electrolytic capacitor module 1 is made possible.
• the plated-through holes 13, 14 can also be arranged on an outer surface of the chamber 6.
• a fixing device in the form of an opening 11 is arranged in each case on two opposite sides in the area of the chamber 6 in the carrier lath 3.
• the electrolytic capacitor module 1 with the housing 2 of the control device is positively or non-positively, for example by means of a screw or a rivet, connectable.
• FIG. 2 a and 2 b each show a cylindrical electrolytic capacitor 4 with a capacitor cup 5 and two lids 7, 8 each arranged on an end face of the capacitor cup 5, which fix a capacitor coil 9 (not shown here) in the interior of the capacitor cup 5.
• the connecting wires 15, 16 are arranged in this case on an end face of the capacitor cup 5.
• a connection wire 15, 16 is arranged on each end face.
• the capacitor cup 5 has three slot-shaped openings 10
• Fig. 2b the capacitor cup 5 has three circular openings 10.
• the openings 10 could also be shaped differently, for example as an ellipse.
• FIG. 3 shows a section through the electrolytic capacitor module 1 and a housing 2 of a control unit connected to the electrolytic capacitor module 1, wherein the housing 2 is only partially shown.
• the electrolytic capacitor 4 is surrounded at least partially with casting compound 12 on its outer side in the region of the chamber 6. As already mentioned above, this prevents in particular that when vibrations occur, the electrically conductive connections between the
• Lead wires 15, 16 of the electrolytic capacitor 4 and the vias 13, 14 of the chamber 6 are damaged.
• Condenser coil 9 of the electrolytic capacitor 4 at least partially fill with casting compound 12. This prevents, as already explained, that the capacitor winding 9 can move relative to the surrounding capacitor cup 5, and the electrical connection between the winding 9 and the connecting wires 15, 16 dissolves.
• a fastening device in the form of an opening 11 is arranged in each case on two opposite sides in the region of the chamber 6 in the support slat 3.
• the electrolytic capacitor module 1 with the housing 2 of the controller form-fitting or non-positively, for example by means of a screw or a rivet, connectable.
• the space between the electrolytic capacitor 4 and the housing 2 may be filled with thermal grease.
• this serves, in particular, as a further measure for vibration damping; on the other hand, this dissipates the heat generated in the electronic component to the housing.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Manufacturing & Machinery (AREA)
• Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=50030019

Family Applications (1)

Country Status (5)

Families Citing this family (7)

Family Cites Families (12)

• 2012
  • 2012-11-08 DE DE102012110684.3A patent/DE102012110684A1/de not_active Withdrawn
• 2013
  • 2013-11-04 EP EP13826555.8A patent/EP2917924A1/de not_active Withdrawn
  • 2013-11-04 WO PCT/DE2013/200271 patent/WO2014071942A1/de active Application Filing
  • 2013-11-04 JP JP2015541013A patent/JP6045713B2/ja active Active
  • 2013-11-04 US US14/441,594 patent/US9715969B2/en active Active
  • 2013-11-04 DE DE112013005324.1T patent/DE112013005324A5/de active Pending

Non-Patent Citations (2)

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