High capacity secondary battery of jelly roll type

A cylindrical secondary battery comprising:

• a terminal having a disk and a stud projecting axially from said disk, said disk having an off-center hole defined therein, said stud having an externally threaded surface and an internally threaded central hole;
• a cap fastened between said disk and a nut which is threaded over said externally threaded surface;
• a bolt threaded into said internally threaded central hole for sandwiching a conductor between a head of the bolt and an end of said stud;
• a stopper pin having an end portion fixed to said cap and an opposite end portion fitted in said off-center hole in said disk;
• and
• an insulating collar fitted over said opposite end portion of said stopper pin for electrically insulating said cap from said disk.

A cylindrical secondary battery comprising a positive and a negative electrode, each electrode having a collector coated with an active material on opposite surfaces and a plurality of leads extending from one edge, said electrodes being wound with separators to form a spirally coiled electrode assembly having the electrodes spaced from each other by one of the separators and having leads for one electrode extending from one end of the assembly and leads for the other electrode extending from another end of the assembly;

• positive and negative terminals secured to said leads extending from the respective opposite ends of the assembly with each lead having a bent portion;
• a cylindrical casing housing said spirally coiled electrode assembly, said rectangular leads, and said positive and negative terminals;
• and
• a pair of caps mounted on respective opposite ends of said cylindrical casing, and said positive and negative terminals being fixed to a respective cap.

A cylindrical secondary battery comprising a positive and a negative electrode, each electrode having a collector coated with an active material on opposite surfaces and a plurality of leads extending from one edge, said electrodes being wound with separators on a core to form a spirally coiled electrode assembly having the electrodes spaced from each other by one of the separators and having leads for one electrode extending from one end of the assembly and leads for the other electrode extending from another end of the assembly;

• positive and negative terminals, each terminal being a disk having gas release holes, said lead being welded to an outer circumferential surface of the respective disk;
• an insulating collar between each disk and an end of the core for electrically insulating the core from said disk, each collar having gas release holes aligned with the holes of the disk;
• positive and negative terminals secured to said rectangular leads extending from the respective opposite ends of the assembly;
• a cylindrical casing housing said spirally coiled electrode assembly, said rectangular leads, said collars and said positive and negative terminals;
• and
• a pair of caps mounted on respective opposite ends of said cylindrical casing, and said positive and negative terminals being fixed to a respective cap.

A cylindrical secondary battery comprising a positive and a negative electrode, each electrode having a collector coated with an active material on opposite surfaces and a plurality of leads extending from one edge, said electrodes being wound with separators to form a spirally coiled electrode assembly having the electrodes spaced from each other by one of the separators and having leads for one electrode extending from one end of the assembly and leads for the other electrode extending from another end of the assembly;

• positive and negative terminals secured to said leads extending from the respective opposite ends of the assembly;
• a cylindrical casing housing said spirally coiled electrode assembly, said rectangular leads, and said positive and negative terminals;
• a pair of caps mounted on respective opposite ends of said cylindrical casing, and said positive and negative terminals being fixed to a respective cap;
• each of said positive and negative terminals having a disk and a stud projecting axially from said disk, said disk having an off-center hole defined therein, said stud having an externally threaded surface and an internally threaded central hole;
• each of said caps being fastened between said disk and a nut which is threaded over said externally threaded surface;
• a bolt threaded into said internally threaded central hole for sandwiching a conductor between a head of the bolt and an end of said stud;
• a stopper pin having an end portion fixed to each of said caps and an opposite end portion fitted in said off-center hole in said disk;
• and
• an insulating collar fitted over said opposite end portion of said stopper pin for electrically insulating said cap from said disk.