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US 12,603,396 B2Granted
Electrode assembly, method for manufacturing the same and secondary battery
AssigneeLG Energy Solution, Ltd.
InventorsSong Yi Han, Ji Hoon Ryu
Life of this patent
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Abstract
An electrode includes a first electrode and a second electrode alternately stacked with a separator therebetween. The first electrode a first-a electrode and a first-b electrode, in which electrode active material layers have thicknesses different from each other.
Claims8
An electrode assembly, comprising:
- a first electrode having a first electrode active material layer and a second electrode having a second electrode active material layer are alternately stacked with a separator therebetween,
- wherein the first electrode comprises a plurality of first-a electrodes and a plurality of first-b electrodes, in which the first electrode active material layer of each first-a electrode is thicker than the first electrode active material layer of each first-b electrode,
- wherein each first-a electrode and each first-b electrode comprise a first-a electrode tab and a first-b electrode tab, respectively,
- wherein the first-b electrode tab has a width greater than a width of the first-a electrode tab,
- wherein the first-a electrode tab and the first-b electrode tab do not overlap in a stacking direction,
- wherein the first-b electrode tab and the first-a electrode tab are bonded to a first electrode lead,
- wherein the first-b electrode tab and the first-a electrode tab are respectively bonded to a first side and a second side of the first electrode lead without being in direct contact with each other,
- wherein the first electrode lead has a first section having a width equal to a greatest width between a side edge of the first-b electrode tab and a side edge the first-a electrode tab and a second section having a width less than the first section, and
- wherein a number of the plurality of first-a electrodes is twice a number of the plurality of first-b electrodes.
6 more elements
A method for manufacturing an electrode assembly, the method comprising:
- a first electrode manufacturing step of manufacturing a first electrode comprising a plurality of first-a electrodes and a plurality of first-b electrodes, in which electrode active material layers have different thicknesses;
- and
- an electrode assembly manufacturing step of alternately stacking a second electrode and the first-a electrode or the first-b electrode of the first electrode with a separator therebetween to manufacture the electrode assembly,
- wherein, in the first electrode manufacturing step, non-coating portions, on which the electrode active material does not exist, of the first-a electrode and the first-b electrode are cut to manufacture a first-a electrode tab and a first-b electrode tab,
- wherein the first-b electrode tab has a width greater than a width of the first-a electrode tab and the first-a electrode tab and the first-b electrode tab do not overlap in a stacking direction,
- after the electrode assembly manufacturing step, an electrode lead bonding step of bonding the first-a electrode tab and the first-b electrode tab to a first electrode lead and bonding a second electrode tab of the second electrode to a second electrode lead,
- wherein the first-a electrode tab and the first-b electrode tab are respectively bonded to a first side and a second side of the first electrode lead without being in direct contact with each other,
- wherein the first-b electrode tab and the first-a electrode tab are respectively bonded to a first side and a second side of the first electrode lead without being in direct contact with each other,
- wherein the first electrode lead has a first section having a width equal to a greatest width between a side edge of the first-b electrode tab and a side edge the first-a electrode tab and a second section having a width less than the first section, and
- wherein a number of the plurality of first-a electrodes is twice a number of the plurality of first-b electrodes.
7 more elements
Dependencies are inferred from the claim text.