Patent ID: 8263248
Filing Date: 2012-09-11
Classification: H01M,Y02E,Y02P

Abstract:
1. An electrochemical device, comprising: an electrode assembly comprising: an elongated positive electrode; an elongated negative electrode; and a plurality of separation layers engagable with each other to form a continuous separation barrier between each of the positive electrode and the negative electrode; the plurality of separation layers positioned such that the positive electrodes, separation layers, and negative electrode are wound around a central axis thereby forming a coil of alternating electrode and separation layers such that the separation layer prevents direct contact between successive electrode layers; a first longitudinal edge of the positive electrode extending beyond a first longitudinal edge of the separation layer, and a first longitudinal edge of the negative electrode extending beyond a second longitudinal edge of the separation layer such that the plurality of separation layers is tensioned across the electrode assembly and defines a cell width with the width of the electrodes extending beyond the width of the plurality of separator layers; and a housing having a positive plate electrically coupled to the first longitudinal edge of the positive electrode and a negative plate electrically coupled to the first longitudinal edge of the negative electrode, wherein the electrode assembly is enclosed by the housing.