# US 2021/0280934 A1 · Electrical feedthrough glass-metal electrodes

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- Number: US 2021/0280934 A1
- Document ID: US20210280934A1
- Status: Published application
- Kind: A1
- Application number: 17/328,746
- Filed: 2021-05-24
- Published: 2021-09-09
- Earliest claimed: 2018-11-23
- Assignees: Schott AG
- Applicants: Schott AG
- Inventors: Helmut Hartl
- Web page: https://patentgrep.com/patent/US20210280934A1

## CPC

- H01G 11/80: Gaskets; Sealings
- H01M 50/169: by welding, brazing or soldering
- H01G 11/74: Terminals, e.g. extensions of current collectors
- H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence)
- H01M 50/157: Inorganic material
- H01M 50/186: characterised by the disposition of the sealing members
- H01M 50/191: Inorganic material
- H01M 50/534: characterised by the material of the leads or tabs
- H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding
- H01M 50/579: in response to shock
- H01M 50/581: in response to temperature
- H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence)
- H01M 2200/00: Safety devices for primary or secondary batteries
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

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.

## Claims

### Claim 1

An electrical device, comprising:
a housing part;
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.

### Claim 2 (depends on 1)

The electrical device of claim 1, wherein the collar is an upward bulging reshaped collar, the housing part and the collar being a single piece.

### Claim 3 (depends on 1)

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 the top side, the transitional region being rounded with a radius R.

### Claim 4 (depends on 1)

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, or in a range of 0.1 mm to 0.3 mm and glazing length EL of the inner wall is in a range of 0.3 mm to 1 mm, a range of 0.4 mm to 0.7 mm, or the glazing length EL is 0.6 mm.

### Claim 5 (depends on 1)

The electrical device of claim 1, wherein the housing part has a first thermal coefficient of expansion α1, the glass and/or glass ceramic material has a second thermal coefficient of expansion α2 and the contact element, has a third thermal coefficient of expansion α3 and the thermal coefficients of expansion α1, α2 and/or α3 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.

### Claim 6 (depends on 1)

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, a plane of the surface of the collar is located below a plane of the surface of the contact element or a surface of the insulating element is located in one plane with the surface of the contact element.

### Claim 7 (depends on 1)

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.

### Claim 8 (depends on 1)

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.

### Claim 9 (depends on 8)

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.

### Claim 10 (depends on 1)

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.

### Claim 11 (depends on 10)

The electrical device, of claim 10, wherein the electrical storage device has a housing
which is connected via a flange with the feedthrough, the flange being a flexible flange.

### Claim 12 (depends on 11)

The electrical device of claim 11, wherein the flange of the electrical storage device provides a free space F between a raised or lowered region, and a glazing, the flange having a connecting region.

### Claim 13 (depends on 12)

The electrical storage device of claim 12, wherein the flexible flange has a tip.

### Claim 14 (depends on 13)

The electrical storage device of claim 13, wherein the flange is weakened in the region of the tip.

### Claim 15 (depends on 14)

The electrical storage device of claim 14, 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.

### Claim 16 (depends on 11)

The electrical storage device of claim 11, wherein the flexible flange is connected with a battery housing by welding, laser welding or soldering.

### Claim 17 (depends on 16)

The electrical storage device of claim 16, 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.

### Claim 18 (depends on 12)

The electrical storage device of claim 12 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 that the inorganic material, in particular the glass or glass ceramic material covers at least one area of a partial surface of a housing component.

### Claim 19 (depends on 18)

The electrical storage device of claim 18, 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.

### Claim 20 (depends on 19)

The electrical storage device of claim 19, 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.

### Claim 21 (depends on 20)

The electrical storage device of claim 20, wherein a wall of the raised or lowered housing component includes recesses, embossing, fluting or openings.

### Claim 22 (depends on 21)

The electrical storage device of claim 21, 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.

### Claim 23 (depends on 22)

The electrical storage device of claim 22, wherein the inorganic material, the glass or the glass ceramic material has pores in its volume area, the pores being bubble-shaped pores.

### Claim 24 (depends on 23)

The electrical storage device of claim 23, 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-%.

### Claim 25 (depends on 24)

The electrical storage device of claim 24, wherein the glass or the glass ceramic material forms a glass-metal bond with the end face of the raised or lowered region of the housing region, the bond being free of pores at least in the outside circumferential region of the raised or lowered region.

### Claim 26 (depends on 25)

The electrical storage device of claim 25, wherein the surface of the glass or the glass ceramic material is positioned on the surface facing away from the interior of the housing in a plane with the surface of the conductor.

### Claim 27 (depends on 26)

The electrical storage device of claim 26, wherein the contact element in the form of a metal pin, a contact pin, or a cap-shaped element includes an indentation.

### Claim 28 (depends on 27)

The electrical storage device of claim 27, wherein the raised or lowered region progresses in such a way that a constriction is created.

### Claim 29 (depends on 29)

The electrical storage device of claim 29, wherein the raised or lowered region has a glazing length L.