Electrode assembly, battery cell including the electrode assembly, and method of preparing the battery cell
AssigneeSamsung SDI Co., Ltd.
InventorsCheon-Soo Kim, Ho-Seong Kim
Life of this patent
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Abstract
An electrode assembly is prepared by stacking and winding a first electrode, a second electrode, and a separator disposed between the first and second electrodes. The electrode assembly is curved to the center of an axis that is substantially parallel to a length direction of the electrode assembly, and the separator has a coated layer of a thermoplastic polymer on at least one side thereof. A battery cell including the electrode assembly, and a method of preparing the battery cell have also been disclosed. The battery cell including the electrode assembly may have a high strength.
Claims30
An electrode assembly prepared by stacking and winding a first electrode, a second electrode, and a separator between the first and second electrodes,
- wherein the electrode assembly is curved to the center of an axis that is substantially parallel to an edge of the electrode assembly in a length direction, and
- wherein the separator is coated with a layer of a thermoplastic polymer on at least one side of the separator.
A battery cell comprising:
- an electrode assembly prepared by stacking and winding a first electrode, a second electrode, and a separator between the first and second electrodes, the separator has at least one side coated with a thermoplastic polymer,
- a pair of electrode tabs protruding from one side surface of the electrode assembly;
- and
- a case accommodating the electrode assembly and an electrolyte and curved to the center of a same axis as an axis of the electrode assembly that is substantially parallel to an edge of the electrode assembly in a length direction.
A method of preparing a battery cell, the method comprising:
- preparing a separator having a thermoplastic polymer coated on at least one side of the separator;
- preparing an electrode assembly comprising a first electrode, a second electrode, and the separator between the first and second electrodes;
- preparing a flat battery cell by accommodating the electrode assembly in a case, sealing the case except for an electrolyte inlet, and sealing the electrolyte inlet after injecting an electrolyte;
- and
- curving the flat battery cell to the center of an axis that is substantially parallel to an edge of the electrode assembly in a length direction.
Dependencies are inferred from the claim text.