Patent ID: 8298701
Filing Date: 2012-10-30
Classification: H01G,H01M,Y02E,Y02P,Y10T

Abstract:
1. An electrochemical device comprising: a housing; a stack of electrochemical cells in the housing, each electrochemical cell comprising: an anode electrode; a cathode electrode; a separator located between the anode electrode and the cathode electrode; and an electrolyte; a current collector located between adjacent electrochemical cells; an anode bus operatively connected to the anodes of the electrochemical cells in the stack; and a cathode bus operatively connected to the cathodes of the electrochemical cells in the stack, wherein, the anode electrode, the anode bus and the cathode bus comprise graphite wherein the cathode electrode comprises a doped or undoped cubic spinel -MnO 2 -type material or NaMn 9 O 18 tunnel structured orthorhombic material, the anode electrode comprises activated carbon and the electrolyte comprises sodium ions; wherein the electrochemical cells in the stack of electrochemical cells are stacked in a prismatic configuration, wherein: the anode electrode of each electrochemical cell in the prismatic stack is electrically connected to the anode bus; the anode electrodes of the electrochemical cells in the prismatic stack are electrically connected in parallel to the anode bus; the anode bus is electrically connected to a positive contact which protrudes outside the housing; the cathode electrode of each electrochemical cell in the prismatic stack is electrically connected to the cathode bus; and the cathode electrodes of the electrochemical cells in the prismatic stack are electrically connected in parallel to the cathode bus; and the cathode bus is electrically connected to a negative contact which protrudes outside the housing.