Cell tab with an integrated rupture valve for a battery cell, and a battery cell comprising said cell tab
View Patent ↗A cell tab with an integrated rupture valve for a battery cell. The cell tab includes a base body having a first part and a second part. A plastic material is arranged on the surface of the base body between the first part and the second part. A first opening is arranged on the first part, and a second opening is arranged on the second part. An inner channel extends between the first opening and the second opening in the interior of the base body. A rupture disc is arranged on the second opening is gas-tight and thus provides a rupture valve.
1 . A cell tab having an integrated rupture valve for a battery cell, said cell tab comprising:
a base body including a rectangular shaped first part and a rectangular shaped second part;
a plastic material arranged on an outer surface of the base body at a location between the first part and the second part;
a first opening arranged on the first part;
a second opening arranged on the second part, wherein the second opening is parallel to and spaced apart from the first opening;
an inner channel disposed in an interior of the base body, the inner channel extending between the first opening and the second opening, wherein the inner channel extends perpendicularly with respect to the first and second openings;
a rupture disc arranged over the second opening to close the second opening in a gas-tight manner, and thereby constituting a rupture valve; and
a first channel extending from the first opening arranged on the first part, and a second channel extending from the second opening arranged on the second part, wherein the second channel is parallel to and spaced apart from the first channel, and wherein the first and second channels are interconnected with the inner channel,
wherein the inner channel extends between the first channel and the second channel, and wherein the inner channel extends perpendicularly with respect to the first and second channels.
2 . The cell tab according to claim 1 , wherein the plastic material is arranged fully circumferentially on an exterior of the base body.
3 . The cell tab according to claim 1 , wherein, in a region of the plastic material applied to the base body, said base body comprises an extension, which extends at least to two opposite exteriors of the base body.
4 . The cell tab according to claim 3 , wherein the extension is trapezoidal when viewed in cross-section.
5 . The cell tab according to claim 1 , wherein a weld surface is arranged in the first part for connecting anodes or cathodes of the battery cell on the outer surface of the base body.
6 . The cell tab according to claim 5 , wherein the first opening is arranged between the weld surface and the plastic material.
7 . The cell tab according to claim 1 , wherein, in the second part, a connection surface is arranged on the outer surface of the base body for external electrical contacting of the cell tab.
8 . A battery cell embodied as a pouch cell, wherein a connector anode or a connector cathode of the battery cell is guided outwardly by way of the cell tab according to claim 1 .
9 . The battery cell according to claim 8 , further comprising a sensor unit configured to detect rupturing of the rupture disc.
10 . The battery cell according to claim 9 , wherein the sensor unit comprises a laminar element arranged at a distance from the rupture disc and not in electrical connection with the cell tab.
11 . A battery cell comprising the cell tab of claim 1 .
12 . A battery comprising the battery cell of claim 11 .
13 . A motor vehicle comprising the battery of claim 12 .
14 . The cell tab according to claim 1 , wherein a weld surface is arranged on the outer surface of the first part for connecting anodes or cathodes of the battery cell, and a connection surface is arranged on the outer surface of the second part for external electrical contacting of the cell tab.
15 . The cell tab according to claim 14 , wherein the first opening is arranged between the weld surface and the plastic material.
16 . The cell tab according to claim 14 , further comprising two of the connection surfaces arranged on the surface of the second part, wherein the second opening is positioned between the two connection surfaces.
17 . The cell tab according to claim 16 , wherein the inner channel extends beneath one of the two connection surfaces and the plastic material.
18 . A cell tab having an integrated rupture valve for a battery cell, said cell tab comprising:
a base body including a rectangular shaped first part and a rectangular shaped second part;
a plastic material arranged on an outer surface of the base body at a location between the first part and the second part;
a first opening arranged on the first part;
a second opening arranged on the second part, wherein the second opening is parallel to and spaced apart from the first opening;
an inner channel disposed in an interior of the base body, the inner channel extending between the first opening and the second opening, wherein the inner channel extends perpendicularly with respect to the first and second openings; and
a rupture disc arranged over the second opening to close the second opening in a gas-tight manner, and thereby constituting a rupture valve,
wherein, in a region of the plastic material applied to the base body, said base body comprises an extension which extends at least to two opposite exteriors of the base body,
wherein the extension is trapezoidal when viewed in cross-section,
wherein the plastic material extends about a perimeter of the extension.