| CPC H01M 50/211 (2021.01) [H01M 10/48 (2013.01); H01M 50/249 (2021.01); H01M 50/308 (2021.01); H01M 50/553 (2021.01); H01M 2220/20 (2013.01)] | 19 Claims |
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1. A stack battery pack for an electric aircraft, the stack battery pack comprising:
a first pouch cell comprising a first top surface and a first bottom surface and wherein the first pouch cell comprises a first insulator layer configured to allow for a flow of ions across the first insulator layer;
a second pouch cell comprising a second top surface and a second bottom surface, wherein the first pouch cell and the second pouch cell are aligned along a vertical axis such that the first bottom surface is adjacent to the second top surface, and wherein the second pouch cell comprises a second insulator layer configured to allow for a flow of ions across the second insulator layer;
an ejecta barrier located between the first pouch cell and the second pouch cell, wherein the ejecta barrier is a structural element configured to be substantially impermeable to a first cell ejecta from the first pouch cell, and wherein the ejecta barrier comprises at least a rigid carbon fiber element having a lithophilic metal coating configured to absorb lithium-based compounds, defines at least a portion of the first bottom surface of the first pouch cell and the second top surface of the second pouch cell, and the first pouch cell and the second pouch cell are mounted on opposite sides of the ejecta barrier such that the ejecta barrier structurally supports the first pouch cell and the second pouch cell;
a first vent configured to vent the first cell ejecta from the first pouch cell, wherein the first vent is disposed in the first top surface and oriented outward from the ejecta barrier;
a second vent configured to vent second cell ejecta from the second pouch cell and oriented outward from the ejecta barrier, wherein the second vent is disposed within the second bottom surface, wherein the second cell ejecta is vented in an opposite direction of venting of the first cell ejecta with respect to the vertical axis; and
a tube in fluid communication with the first vent and defining a flow path, wherein the flow path does not intersect with any surface of the second pouch cell and is oriented in parallel with a flow path from the second vent, wherein the tube is configured to receive the vented first cell ejecta and transport the vented first cell ejecta along the flow path.
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