Thin film electrochemical cell with a polymer double seal
AssigneeElectrovaya Inc.
InventorsRakesh Bhola, Rajshekar Das Gupta, Sankar Das Gupta
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Abstract
A double-sealed thin film electrochemical pouch cell, comprising a cathode current collector, a cathode, an electrolyte, an anode, and an anode current collector, which is double-sealed by a first inner laminate layer forming a primary seal covered by a second outer polymer layer forming a secondary seal. The second outer polymer layer comprises embedded particles to increase the thermal conductivity of the second outer polymer layer.
Claims26
A thin film electrochemical pouch cell comprising:
- an electrode assembly comprising a cathode current collector, a cathode, an electrolyte, an anode, and an anode current collector;
- a first polymer layer forming a primary seal area substantially enclosing the electrode assembly;
- and
- a second polymer layer forming a secondary seal area covering at least a portion of the first polymer layer,
- wherein the secondary seal area extends along the primary seal area, and
- wherein the second polymer layer is a heat-dissipating polymer layer that comprises embedded particles to increase a thermal conductivity of the second polymer layer.
A battery comprising a plurality of cells, wherein each of the plurality of cells is a thin film electrochemical pouch cell comprising:
- an electrode assembly comprising a cathode current collector, a cathode, an electrolyte, an anode, and an anode current collector;
- a first polymer layer forming a primary seal area substantially enclosing the electrode assembly;
- and
- a second polymer layer forming a secondary seal area covering at least a portion of the first polymer layer;
- wherein at least one of the plurality of cells comprises a non-uniform second polymer layer having a variation in one of thickness and coverage over the first polymer layer to promote uniform temperature distribution across the battery,
- wherein the second polymer layer is a heat-dissipating polymer layer that comprises embedded particles to increase a thermal conductivity of the second polymer layer, and
- wherein the secondary seal area extends along the primary seal area.
Dependencies are inferred from the claim text.