Electrical feedthrough glass-metal electrodes
An electrical device, having a feedthrough through a housing part which has a material thickness T of the housing of the device and is made of metal. The metal being iron, iron alloys, iron-nickel alloys, iron-nickel-cobalt alloys, KOVAR, steel, high-grade steel, aluminum, aluminum alloys, AlSiC, magnesium, magnesium alloys, titanium or titanium alloys. The housing part having at least one opening, wherein the opening receives a contact element, being a conductor consisting of a conductive material in a glass or glass ceramic material. The housing part has a collar in the region of the opening and thus forms an inner wall of the feedthrough opening having a height H, which is greater than material thickness T, wherein glazing length EL of the glass or glass ceramic material preferably corresponds to height H.
1 . An electrical device, comprising:
a housing part, the housing part being a monolithic structure;
a feedthrough extending through the housing part, the housing part having a material thickness T and is made of metal, the metal being iron, iron alloys, iron-nickel alloys, iron-nickel-cobalt alloys, KOVAR, steel, stainless steel, high-grade steel, aluminum, aluminum alloys, AlSiC, magnesium, magnesium alloys, titanium or titanium alloys, wherein the housing part has at least one opening, wherein the opening receives a contact element consisting of a conductive material in a glass or glass ceramic material, the housing part having a collar in the region of the opening, the collar forms an inner wall of the feedthrough at the opening, the inner wall having a height H which is greater than the material thickness T, wherein a glazing length EL of the glass or the glass ceramic material corresponds to the height H, wherein the housing part includes a flange for connection with a housing, the flange including a connecting region, the flange has a free space F between a raised or a lowered region providing the glazing length and the connecting region, wherein the flange is a flexible flange, the glass or the glass ceramic material being at least partly in contact with the opening of the housing part, the flange being nonparallel relative to the collar.
2 . The electrical device of claim 1 , wherein the collar is an upward bulging reshaped collar.
3 . The electrical device of claim 1 , wherein there is a transitional region between the collar and the housing part, the transitional region being rounded on at least one side, the at least one side including a top side, the transitional region being rounded with a radius R.
4 . The electrical device of claim 1 , wherein material thickness T of the housing part is in a range of 0.02 mm to 1 mm and glazing length EL of the inner wall is in a range of 0.3 mm to 1 mm.
5 . The electrical device of claim 1 , wherein the housing part has a first thermal coefficient of expansion a 1 , the glass and/or glass ceramic material has a second thermal coefficient of expansion a 2 , and the contact element has a third thermal coefficient of expansion a 3 and the thermal coefficients of expansion a 1 , a 2 and/or a 3 vary by 2*10 −6 l/K at most, by no more than 1*10 −6 l/K, they are substantially the same, and/or are in the range of 3 to 7*10 −6 l/K, in the range of 4.5 to 5.5*10 −6 l/K or in the range of 9*10 −6 l/K to 11*10 −6 l/K.
6 . The electrical device of claim 1 , further comprising an insulating element arranged on the glass or the glass ceramic material, the insulating element consisting of a plastic material, a glass or glass ceramic material, the insulating element covering a front face of the collar, wherein (i) a plane of a surface of the collar is located below a plane of a surface of the contact element or (ii) a surface of the insulating element is located in one plane with the surface of the contact element.
7 . The electrical device of claim 1 wherein the contact element is a cap-shaped element having a thickness in the range of 0.1 mm to 0.3 mm.
8 . The electrical device of claim 1 , wherein the feedthrough includes a connecting conductor being a tongue which is connected electrically and/or mechanically with the contact element, the contact element being a pin-shaped conductor or a cap-shaped element.
9 . The electrical device of claim 8 , wherein the contact element is round, with a diameter, the diameter being in a range of 1.5 mm to 5.0 mm, or the diameter is in a range of 2.0 mm to 4.00 mm.
10 . The electrical device of claim 1 , wherein the electrical device is an electrical storage device having a total height not exceeding 5 mm, not exceeding 4 mm, not exceeding 3 mm, in a range of 1 mm to 5 mm, or in a range of 1 mm to 3 mm.
11 . The electrical device of claim 1 , wherein the electrical device has the housing which is connected via the flange with the feedthrough.
12 . The electrical device of claim 11 , wherein the flange has a tip.
13 . The electrical device of claim 12 , wherein the flange is weakened in a region of the tip.
14 . The electrical device of claim 13 , wherein the tip of the flange has a thickness in the range of 0.05 to 0.2, or a thickness of 0.15 mm.
15 . The electrical device of claim 11 , wherein the flange is connected with a battery housing by welding, laser welding or soldering.
16 . The electrical device of claim 15 , wherein the flange is connected with the battery housing, the connection being substantially gas impermeable having an He leakage rate of less than 1·10−8 mbar l/sec.
17 . The electrical device of claim 11 , wherein the feedthrough has a plane of a housing region on a surface facing away from a housing interior outside of the feedthrough opening above or below, with an offset to a plane formed by a surface of the conductor facing away from the housing interior and wherein inorganic material, which is the glass or glass ceramic material, covers at least one area of a partial surface of a housing component.
18 . The electrical device of claim 17 , wherein the offset measures no more than 1 mm, no more than 0.7 mm, or is in a range of 0.1 mm to 1 mm.
19 . The electrical device of claim 18 , wherein the partial surface of the housing component that is covered by the inorganic material has a wall thickness, the wall thickness being less than 1 mm, less than 0.7 mm, less than 0.5 mm, less than 0.3 mm, less than 0.2 mm, less than 0.1 mm, in a range of 0.02 mm to 1 mm, or in a range of 0.02 mm to 0.1 mm.
20 . The electrical device of claim 1 , wherein a wall of the raised or lowered housing region includes recesses, embossing, fluting or openings.
21 . The electrical device of claim 1 , wherein the opening has a diameter and the diameter of the raised or lowered region decreases or increases in a progression of the raised or lowered region.
22 . The electrical device of claim 1 , wherein the glass or the glass ceramic material has pores in its volume, the pores being bubble-shaped pores.
23 . The electrical device of claim 22 , wherein a share of the pores in the volume of the glass or the glass ceramic material is in a range of 10 volume-% to 45 volume-%, or 18 volume-% to 42 volume-%.
24 . The electrical device of claim 22 , wherein the glass or the glass ceramic material forms a glass-metal bond with an end face of the raised or lowered region of the housing part, the bond being free of pores at least in an outside circumferential region of the raised or lowered region.
25 . The electrical device of claim 1 , wherein a surface of the glass or the glass ceramic material is positioned on a surface facing away from the interior of the housing in a plane with a surface of the conductor.
26 . The electrical device of claim 1 , wherein the contact element is in the form of a metal pin, a contact pin, or a cap-shaped element and includes an indentation.
27 . The electrical device of claim 11 , wherein the raised or lowered region progresses in such a way that a constriction is created.
28 . The electrical device of claim 27 , wherein the raised or lowered region has a glazing length L.
29 . The electrical device of claim 1 , wherein:
(i) the glass or glass ceramic material is sealed in the opening of the housing part;
(ii) the housing part is a reshaped metal part with the material thickness T;
(iii) the flange is spaced apart from the opening of the housing part; and
(iv) the flange has the free space F between the raised or the lowered region—that forms the collar and provides the glazing length—and the connecting region, so that the flange is the flexible flange.
30 . The electrical device of claim 1 , wherein the flange extends radially outwardly to connect with the housing.