Electrode plate winding device and rolling method for cylinder type battery
AssigneeSamsung SDI Co., Ltd.
InventorSoonki Woo
Life of this patent
Estimating the term…
Abstract
An electrode plate winding device and rolling method for cylinder type battery that is to increase a battery capacity by rolling the electrode plate in a cylinder-like shape. The electrode plate winding device has a mandrel which winds electrode plates coated with the active material layers having different polarity and separators, interposed between the plates. The mandrel is of a generally round cross-section but divided into two parts by a groove. The mandrel having at least one electrode tap region formed in one of the divided parts.
Claims20
An electrode plate winding device for a cylinder type battery comprising:
- a mandrel winding a first electrode plate and a second electrode plate to which a first active material layer and a second active material layer are applied;
- the first active material layer and the second active material layer each having a different polarity;
- a first separator arranged between the first electrode plate and the second electrode plate;
- a second separator arranged so that, upon winding of the first electrode plate, the second electrode plate, the first separator, and the second separator about the mandrel, the second separator is between the second electrode plate and the first electrode plate;
- and
- wherein the mandrel is of generally round cross-section and the mandrel is divided into two divided parts by a groove and at least one electrode tap region is formed in at least one of the divided parts.
A generally cylindrical, elongated mandrel, comprising:
- a groove to divide the mandrel into a first divided part and a second divided part;
- and
- at least one electrode tap region in the first divided part and/or the second divided part of the mandrel.
A method for winding a cylindrical electrode assembly comprising:
- preparing a first electrode plate with a first active material having a first polarity,
- preparing a second electrode plate with a second active material having a second polarity;
- arranging the first electrode plate and the second electrode plate with a first separator and a second separator to form an electrode assembly stack such that the first electrode plate and the second electrode plate are separated by the first separator and the second separator when wound about a mandrel;
- arranging at least one electrode tap at an electrode tap region of the mandrel;
- winding the electrode assembly stack about a mandrel;
- connecting the at least one electrode tap to the first electrode plate and/or the second electrode plate;
- cutting the electrode assembly stack;
- and
- winding a fixing tape about the electrode assembly stack.
A generally cylindrical, elongated mandrel, comprising:
- a groove to divide the mandrel into a first divided part and a second divided part;
- and
- at least one electrode tap region in the first divided part and/or the second divided part of the mandrel, wherein the at least one electrode tap region is formed to allow the connection of an electrode tap to an electrode wound about the mandrel and to minimize deformation of the resultant cylindrical shape of the electrode wound about the mandrel.
Dependencies are inferred from the claim text.