(DE4418406-A1)      The bipolar lead-acid battery has bipolar plates comprising a multi-layered metallic substrate defined as C/A/B/D, layer C having a layer of positive active material adhered thereto and layer D having a layer of negative material adhered to it, C being a member selected from the group consisting of lead, a lead alloy and a conductive tin, titanium or ruthenium oxide, A being a member selected from the group consisting of titanium and tin, B being a member selected from the group consisting of copper and tin, and D being a member selected from the group consisting of lead, a lead alloy and tin.    C is lead, A is titanium, B is copper and D is lead. The battery is a sealed battery. Determinatively D is tin and layer B is omitted. Wherein C is a conductive film of a tin, titanium or ruthenium oxide doped with Db or F.    ADVANTAGE -   Allows case of increase in capacity without necessity of increasing size of plates.    (FR2706081-A1)      The bipolar lead-acid battery has bipolar plates comprising a multi-layered metallic substrate defined as C/A/B/D, layer C having a layer of positive active material adhered and layer D having a layer of negative material adhered to it, C being a member selected from lead, a lead alloy and a conductive tin, titanium or ruthenium oxide, A being a member selected from the titanium and tin, B being a member selected from copper and tin, and D being a member selected from lead, a lead alloy and tin.    C is lead, A is titanium, B is copper and D is lead. The battery is a sealed battery. D is tin and layer B is omitted. Wherein C is a conductive film of a tin, titanium or ruthenium oxide doped with Db or F.    ADVANTAGE -   Allows case of increase in capacity without necessity of increasing size of plates.    (JP6349519-A)      The bipolar lead-acid battery has bipolar plates comprising a multi-layered metallic substrate defined as C/A/B/D, layer C having a layer of positive active material adhered thereto and layer D having a layer of negative material adhered to it, C being a member selected from the group consisting of lead, a lead alloy and a conductive tin, titanium or ruthenium oxide, A being a member selected from the group consisting of titanium and tin, B being a member selected from the group consisting of copper and tin, and D being a member selected from the group consisting of lead, a lead alloy and tin.    C is lead, A is titanium, B is copper and D is lead. The battery is a sealed battery. Determatively D is tin and layer B is omitted. Wherein C is a conductive film of a tin, titanium or ruthenium oxide doped with Db or F.    ADVANTAGE -   Allows case of increase in capacity without necessity of increasing size of plates.    (BE1008327-A6)      The bipolar lead-acid battery has bipolar plates comprising a multi-layered metallic substrate defined as C/A/B/D, layer C having a layer of positive active material adhered thereto and layer D having a layer of negative material adhered to it, C being a member selected from the group consisting of lead, a lead alloy and a conductive tin, titanium or ruthenium oxide, A being a member selected from the group consisting of titanium and tin, B being a member selected from the group consisting of copper and tin, and D being a member selected from the group consisting of lead, a lead alloy and tin.    C is lead, A is titanium, B is copper and D is lead. The battery is a sealed battery. Determatively D is tin and layer B is omitted. Wherein C is a conductive film of a tin, titanium or ruthenium oxide doped with Db or F.    ADVANTAGE -   Allows case of increase in capacity without necessity of increasing size of plates.