Housing part, in particular microbattery and method for manufacturing a housing part
A housing part for an electrical device, which is an electrical storage device, a sensor housing, a battery, a microbattery, or a capacitor, the housing part including: a feedthrough, the housing part or a base body which is a part of the housing part including the feedthrough, the feedthrough having at least one opening, the at least one opening having a wall with a reduced enclosure length EL red , the at least one opening configured for receiving a conductive material or a conductor in a glass material or a glass-ceramic material, the reduced enclosure length EL red being in a range of 0.05 mm to 0.6 mm, 0.1 mm to 0.5 mm, 0.1 mm to 0.4 mm, or 0.15 mm to 0.2 mm.
1 . A housing part for an electrical device, which is an electrical storage device, a sensor housing, a battery, a microbattery, or a capacitor, the housing part comprising:
a feedthrough, the housing part or a base body which is a part of the housing part including the feedthrough, the feedthrough having at least one opening, the at least one opening having a wall with a reduced enclosure length EL red , the at least one opening configured for receiving a conductive material or a conductor in a glass material or a glass-ceramic material, the reduced enclosure length EL red being in a range of 0.05 mm to 0.49 mm, the at least one opening being a die cutting opening, which includes a die cutting tear that is in a range of 10% to 60% of an enclosure length L.
2 . The housing part according to claim 1 , wherein the conductive material or the conductor has a first coefficient of expansion α 1 , the glass material or the glass-ceramic material has a second coefficient of expansion α 2 , and the housing part or the base body has a third coefficient of expansion α 3 , wherein the third coefficient of expansion α 3 is always greater than the second coefficient of expansion α 2 .
3 . The housing part according to claim 2 , wherein at least one of:
the third coefficient of expansion α 3 is in a range of 12×10 −6 l/K to 19×10 −6 l/K;
the second coefficient of expansion α 2 is in a range of 9×10 −6 l/K to 11×10 −6 l/K; and
the first coefficient of expansion ai is in a range of 6×10 −6 l/K to 11×10 −6 l/K.
4 . The housing part according to claim 1 , wherein a metal of at least one of the housing part, the base body, and the conductor is one of the following materials: iron, an iron alloy, an iron-nickel alloy, an iron-nickel-cobalt alloy, KOVAR, steel, high-grade steel, stainless steel, aluminum, an aluminum alloy, AISIC, magnesium, a magnesium alloy, copper, a copper alloy, titanium, or a titanium alloy.
5 . The housing part according to claim 1 , wherein the housing part or the base body is a battery cover part with a thickness D 2 , wherein D 2 is in a range of 0.1 mm to 1 mm or 0.1 mm to 0.6 mm.
6 . The housing part according to claim 1 , wherein the housing part or the base body consists of one of the following materials:
a ferritic stainless steel with a coefficient of expansion in a range 10 to 12×10 −6 K −1 ;
a mild steel having a coefficient of expansion in a range 12 to 13×10 −6 K −1 ;
a duplex stainless steel with a coefficient of expansion in a range 13 to 14×10 −6 K −1 ; or
an austenitic stainless steel with a coefficient of expansion in a range 16 to 18×10 −6 K −1 .
7 . The housing part according to claim 1 , wherein a glass pre-tension is set up by way of at least one material of the housing part or of the base body, the glass pre-tension also acting on the conductor via a glass and sets up a push-out force of the conductor.
8 . The housing part according to claim 7 , wherein through an adjustment of the push-out force of the conductor, a safety vent function of the conductor is provided, by which the electrical storage device is opened in a case of an overpressure in an event of a damage.
9 . The housing part according to claim 7 , wherein the push-out force of the conductor is adjusted by at least one of the following measures:
a thickness of an enclosure of the housing part;
using different ones of a plurality of glass materials;
different void fractions in a glass;
a structured glass surface due to a shape of a glass molding prior to an enclosure process;
a structured glass surface due to a shape of a glass molding during an enclosure process;
a structured glass surface due to a laser machining after an enclosure process;
scoring or tapering in the glass material on one or two sides of the glass material;
scoring or tapering in at least one of the conductor, a housing of the electrical device, the housing part, and the base body.
10 . The housing part according to claim 1 , wherein the conductor comprises a head part, which is a terminal head.
11 . The housing part according to claim 10 , wherein the housing part is configured such that an insulating element is arranged between a connection head part of the head part of the conductor and the housing part.
12 . The housing part according to claim 11 , wherein the insulating element is a glass, a glass-ceramic element, or a ceramic.
13 . The housing part according to claim 1 , wherein a material of the glass material or the glass-ceramic material is an aluminoborate glass.
14 . The housing part according to claim 13 , wherein the aluminoborate glass comprises AI 2 O 3 and B 2 O 3 .
15 . The housing part according to claim 2 , wherein the third coefficient of expansion α 3 is 2 to 8×10 −6 l/K greater than the second coefficient of expansion α 2 .