Current collector tab placement to reduce battery shut down time
An electrochemical cell comprising a first electrode separated from a second electrode by a shutdown separator. The first electrode can comprise a first current collector substrate having a first active material composite layered thereon. The second electrode can comprise a second current collector substrate parallel to the first current collector substrate. The second current collector substrate can have a second active material composite layered thereon. The first current collector substrate can have a first current collector tab extending from the first current collector substrate at a position along an axis parallel to a plane defined by the first current collector substrate. The second current collector substrate can have a second current collector tab extending from the second current collector substrate at a same position along the axis as the first current collector tab. A battery including the electrochemical cell and methods for manufacturing the battery are also described.
1 . An electrochemical cell comprising:
a first electrode separated from a second electrode by a shutdown separator, the first electrode comprising a first current collector substrate having a first active material composite layered thereon, the second electrode comprising a second current collector substrate parallel to the first current collector substrate, the second current collector substrate having a second active material composite layered thereon;
the first current collector substrate having a first current collector tab extending from the first current collector substrate at a position along an axis parallel to a plane defined by the first current collector substrate; and
the second current collector substrate having a second current collector tab extending from the second current collector substrate, wherein the second current collector tab is offset from the first current collector tab along the axis parallel to the first current collector substrate by less than 0.1% relative to a length of the first current collector substrate.
2 . The electrochemical cell of claim 1 , wherein at least one of the first current collector substrate and the second current collector substrate is planar.
3 . The electrochemical cell of claim 1 , wherein at least one of the first current collector substrate and the second current collector substrate is curved.
4 . The electrochemical cell of claim 1 , wherein the electrochemical cell is rolled in a jelly roll configuration.
5 . The electrochemical cell of claim 4 , wherein the first current collector tab and the second current collector tab are on an outside surface of the jelly roll configuration.
6 . The electrochemical cell of claim 4 , wherein the first current collector tab and the second current collector tab are in an interior region of the jelly roll configuration.
7 . The electrochemical cell of claim 4 , further comprising other current collector tabs at different positions within the jelly roll configuration.
8 . The electrochemical cell of claim 1 , wherein the electrochemical cell is in a stacked plate configuration having a first end and a second end, and wherein the first current collector tab and the second current collector tab are on a same end of the stacked plate configuration.
9 . The electrochemical cell of claim 8 , wherein at least one plate of the stacked plate configuration is planar.
10 . The electrochemical cell of claim 8 , wherein at least one plate of the stacked plate configuration is curved.
11 . The electrochemical cell of claim 1 , wherein the first electrode is a negative electrode and the second electrode is a positive electrode.
12 . A battery comprising:
a battery housing; and
an electrochemical cell within the battery housing, the electrochemical cell comprising:
a first electrode separated from a second electrode by a shutdown separator, the first electrode comprising a first current collector substrate having a first active material composite layered thereon, the second electrode comprising a second current collector substrate parallel to the first current collector substrate, the second current collector substrate having a second active material composite layered thereon,
the first current collector substrate having a first current collector tab extending from the first current collector substrate at a position along an axis parallel to a plane defined by the first current collector substrate, and
the second current collector substrate having a second current collector tab extending from the second current collector substrate, wherein the second current collector tab is offset from the first current collector tab along the axis parallel to the first current collector substrate by less than 0.1% relative to a length of the first current collector substrate.
13 . The battery of claim 12 , wherein at least one of the first current collector substrate and the second current collector substrate is planar.
14 . The battery of claim 12 , wherein at least one of the first current collector substrate and the second current collector substrate is curved.
15 . The battery of claim 12 , wherein the electrochemical cell is rolled in a jelly roll configuration and the battery housing is a tubular battery housing.
16 . The battery of claim 15 , wherein the first current collector tab and the second current collector tab are on an outside surface of the jelly roll configuration.
17 . The battery of claim 15 , wherein one of the first current collector tab and the second current collector tab are coupled to the battery housing and the other is coupled to a feedthrough.
18 . The battery of claim 15 , wherein both of the first current collector tab and the second current collector tab are coupled to separate feedthroughs.