NOVELTY - The bipolar type secondary battery (10) has cathode (15), anode (13), collector (11) and electrolyte layer (17). The anode is electrically bonded with one surface of the collector. The cathode is electrically bonded to reverse surface of the collector. The electrolyte layer is arranged on the cathode and anode. The collector has higher elution electric potential than the oxidation-reduction potential of the anode, and has lower lithium alloying electric potential than the oxidation-reduction potential of the cathode.    USE - Bipolar type secondary battery for e.g. lithium-ion-secondary-cell for battery pack used as power supply for drive of vehicles (claimed) such as electric vehicle, hybrid electric vehicle, motorbike, passenger car, truck, bus and light car, and fuel-cell vehicle.    ADVANTAGE - The bipolar type secondary battery has excellent reliability.    DETAILED DESCRIPTION - The bipolar type secondary battery has cathode, anode, collector and electrolyte layer. The anode is electrically bonded with one surface of the collector. The cathode is electrically bonded to reverse surface of the collector. The electrolyte layer is arranged on the cathode and anode. The collector has higher elution electric potential than the oxidation-reduction potential of the anode, and has lower lithium alloying electric potential than the oxidation-reduction potential of the cathode. The anode active material is olivine type anode material. The cathode active material is carbon or lithium-transition metal composite oxide such as lithium titanate. The collector material is chosen from iron, chromium, nickel, manganese, titanium, molybdenum, vanadium, niobium, copper, silver, gold, platinum, aluminum and carbon, preferably pure aluminum or titanium. The lithium-transition metal composite oxide is further used as anode active material.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of the bipolar type lithium ion secondary cell. (Drawing includes non-English language text).    Bipolar type secondary battery (10)    Collector (11)    Anode (13)    Cathode (15)    Electrolyte layer (17)