Bipolar Li-ion battery, including: - at least a first and second electrochemical cells (C1, C2) stacked one on top of the other and each comprising an anode, a cathode and an electrolyte, - at least one bipolar current collector one face of which is covered by the anode made of lithium insertion material of the first cell and the opposite face is covered by the cathode made of lithium insertion material of the second cell, the bipolar collector comprising at the periphery thereof, on each of the faces thereof, at least one bead of an electrically insulating material forming a peripheral zone of a wall impermeable to the electrolyte of the first or second cells, surrounding same, - at least one first current collector adjacent to the bipolar collector one face of which is covered by the cathode of the first cell; the first adjacent collector also comprising at the periphery thereof, at least one bead of an electrically insulating material also forming a peripheral zone of a wall impermeable to the electrolyte of the first cell, - at least one second current collector adjacent to the bipolar collector one face of which is covered by the anode of the second cell; the second adjacent collector also comprising at the periphery thereof, at least one bead of an electrically insulating material also forming a peripheral zone of the wall impermeable to the electrolyte of the second cell, characterized in that each impermeable wall is obtained by a technique selected from: - molecular bonding, the material of each bead being made of aluminum oxide (Al 2 O 3), - anodic sealing between a bead of the bipolar collector and the bead of the adjacent collector, and - eutectic melting between a layer of eutectic point metal or metal alloy deposited on a bead of the bipolar collector and a layer of eutectic point metal or metal alloy deposited on a bead of the adjacent collector. - at least a first and second electrochemical cells (C1, C2) stacked one on top of the other and each comprising an anode, a cathode and an electrolyte, - at least one bipolar current collector one face of which is covered by the anode made of lithium insertion material of the first cell and the opposite face is covered by the cathode made of lithium insertion material of the second cell, the bipolar collector comprising at the periphery thereof, on each of the faces thereof, at least one bead of an electrically insulating material forming a peripheral zone of a wall impermeable to the electrolyte of the first or second cells, surrounding same, - at least one first current collector adjacent to the bipolar collector one face of which is covered by the cathode of the first cell; the first adjacent collector also comprising at the periphery thereof, at least one bead of an electrically insulating material also forming a peripheral zone of a wall impermeable to the electrolyte of the first cell, - at least one second current collector adjacent to the bipolar collector one face of which is covered by the anode of the second cell; the second adjacent collector also comprising at the periphery thereof, at least one bead of an electrically insulating material also forming a peripheral zone of the wall impermeable to the electrolyte of the second cell, - molecular bonding, the material of each bead being made of aluminum oxide (Al 2 O 3), - anodic sealing between a bead of the bipolar collector and the bead of the adjacent collector, and - eutectic melting between a layer of eutectic point metal or metal alloy deposited on a bead of the bipolar collector and a layer of eutectic point metal or metal alloy deposited on a bead of the adjacent collector.