Heated folding of seals in battery cells
AssigneeApple Inc.
InventorsSheba Devan, Ramesh C. Bhardwaj, Taisup Hwang, Richard M. Mank
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Abstract
The disclosed embodiments relate to the manufacture of a battery cell. The battery cell includes a set of layers including a cathode with an active coating, a separator, and an anode with an active coating. The battery cell also includes a pouch enclosing the layers, wherein the pouch is flexible. The layers may be wound to create a jelly roll and/or stacked prior to sealing the layers in the flexible pouch. A side fold is also formed in the pouch by producing a target temperature in the range of 55° C. to 75° C. at a side seal of the pouch prior to folding the side seal against the battery cell.
Claims25
A method for manufacturing a battery cell, comprising:
- obtaining a set of layers for the battery cell, wherein the set of layers comprises a cathode with an active coating, a separator, and an anode with an active coating;
- sealing the layers in a pouch to form the battery cell, wherein the pouch is flexible;
- and
- producing a target temperature in the range of 55° C. to 75° C. at a side seal of the pouch during a process of folding the side seal against the battery cell.
A battery cell, comprising:
- a set of layers for the battery cell, wherein the set of layers comprises a cathode with an active coating, a separator, and an anode with an active coating;
- and
- a pouch enclosing the layers, comprising:
- a side seal;
- and
- a terrace seal,
- wherein a side fold is formed in the pouch by producing a target temperature in the range of 55° C. to 75° C. at the side seal during a process of folding the side seal against the battery cell.
A portable electronic device, comprising:
- a set of components powered by a battery pack;
- and
- the battery pack, comprising:
- a battery cell, comprising:
- a set of layers comprising a cathode with an active coating,
- a separator, and an anode with an active coating;
- and
- a pouch enclosing the layers, comprising:
- a side seal;
- and
- a terrace seal,
- wherein a side fold is formed in the pouch by producing a target temperature in the range of 55° C. to 75° C. at the side seal during a process of folding the side seal against the battery cell.
Dependencies are inferred from the claim text.