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US 12,597,615 B2Granted
Current collector and preparation method therefor, secondary battery, battery module, battery pack, and power consuming device
AssigneeContemporary Amperex Technology (Hong Kong) Limited
InventorsManman Wang, Xiaoming Ge, Chuying Ouyang
Life of this patent
Estimating the term…
Abstract
A current collector may comprise a strength enhancement layer and a current collecting layer, wherein the current collecting layer may be stacked and bonded with the strength enhancement layer, and the current collecting layer may comprise a foam metal portion and a solid metal portion.
Claims18
A current collector, comprising:
- a strength enhancement layer;
- and
- a current collecting layer stacked and bonded with the strength enhancement layer, the current collecting layer comprising a foam metal portion and a solid metal portion side by side on a surface of the strength enhancement layer,
- wherein the solid metal portion is provided at one or both ends of the strength enhancement layer in a width direction.
1 more element
A preparation method for a current collector, the method comprising:
- a bonding step comprising stacking an alloy foil for forming a current collecting layer with a strength enhancement layer, and bonding the alloy foil and the strength enhancement layer;
- and
- a foam forming step comprising attaching an anti-corrosion material layer locally on the alloy foil to form an intermediate body to be subjected to foam forming, and placing the intermediate body in a corrosive solution to remove one or more elements constituting the alloy foil from a portion of the alloy foil that is not attached with the anti-corrosion material layer such that the alloy foil forms a foam metal portion, with a portion of the alloy foil that is attached with the anti-corrosion material layer forming a solid metal portion side by side with the foam metal portion on a surface of the strength enhancement layer,
- wherein the solid metal portion is provided at one or both ends of the strength enhancement layer in a width direction.
1 more element
Dependencies are inferred from the claim text.