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US 10,312,494 B2Granted
Tab lead including surface treatment film with polymer having carboxylic acid anhydride groups, and nonaqueous electrolyte secondary battery using the same
AssigneeAutomotive Energy Supply Corporation
InventorsMasahiro Suguro, Hiromoto Taguchi, Yuji Tanjo
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Abstract
Provided is a tab lead for a secondary battery including tab lead metal that has an adhesion interface with sealing resin. The adhesion interface is provided with a surface treatment film formed of a material including a polymer with carboxylic acid anhydride groups. Further provided is a nonaqueous electrolyte secondary battery including the tab lead for the secondary battery as a leading terminal of at least one of a positive electrode and a negative electrode.
Claims15
A tab lead for a secondary battery, comprising
- tab lead metal,
- the tab lead metal comprising an adhesion interface with a sealing resin,
- wherein the adhesion interface is provided with a surface treatment film formed of a polymer with carboxylic acid anhydride groups and carboxylic groups,
- wherein the polymer is formed by:
- applying to the tab lead metal a solution consisting essentially of water and a polycarboxylic acid;
- and
- heating the tab lead metal with the applied solution to form the polymer with carboxylic acid anhydride groups and carboxylic groups.
4 more elements
Dependencies are inferred from the claim text.