Patent ID: 7799464
Filing Date: 2010-09-21
Classification: H01M,Y02E,Y02P

Abstract:
1. A hybrid battery comprising two cells connected with a separator interposed therebetween, a forming product of a cathode active material disposed in an electrolyte in one of the cells, a forming product of an anode active material disposed in an electrolyte in the other cell, a cathode current collector maintaining contact with the forming product of the cathode active material, and an anode current collector maintaining contact with the forming product of the anode active material, wherein the forming product of the cathode active material and the forming product of the anode active material each comprises a combination of a forming product of a power-ensuring active material comprising an electrically conductive filler and a single cell reaction causing material for providing a battery which is chargeable and dischargeable at a large current and has a low storage capacity, the power-ensuring active material having a ratio R 1 of an amount of electrically conductive filler to an amount of single cell reaction causing material, and a separate forming product of energy-ensuring active material comprising an electrically conductive filler and a single cell reaction causing material for providing a battery which is chargeable and dischargeable at a small current and has a high storage capacity, the energy ensuring material having a ratio R 2 of an amount of electrically conductive filler to an amount of single cell reaction causing material, each combination being disposed in a single cell, R 1 being greater than R 2 , such that the amount of conductive filler relative to the amount of single cell reaction causing material is greater in the power-ensuring active material than the energy-ensuring active material, and respective surfaces of the forming products of the cathode and anode active materials being coated with an ion-permeable current collector which has voids therein for allowing ions to pass therethrough, such that the ion-permeable current collector surrounds the forming products the cathode and anode active materials and the surface is electrically conductive.