A battery grid is disclosed. The battery grid includes a pattern of grid wires. The pattern includes a grid wire having a first segment with a first corrosion resistance and a second segment with a second corrosion resistance which is less than the first corrosion resistance. The second segment corrodes at a rate which is faster than the corrosion rate of the first segment so as to dynamically release internal stress and control grid growth of the battery grid during its service life. A battery includes said grid and a method of forming said grid are also disclosed.

Lead/acid batteries are provided that can include: a plurality of electrodes having a planar copper conductive core member bounded by a polymeric frame maintaining the conductive core member in the planar state.

Lead/acid batteries are provided that can include: a plurality of electrodes having a planar copper conductive core member bounded by a polymeric frame maintaining the conductive core member in the planar state.

A liquid lead storage battery includes a grid-like substrate of a positive electrode current collector that includes a frame bone forming four sides of a rectangular shape. Intermediate bones are connected to and present inward of the frame bone. At least some vertical intermediate bones present in a range between the center between a pair of vertical frame bones and the first vertical frame bone, which is the vertical frame bone on the side where a lug is absent, are first vertical intermediate bones extending from the lower to the upper frame bone sides while obliquely expanding from each other, and directly reach an upper frame bone. Angles formed by the first vertical intermediate bones and the upper frame bone on the first vertical frame bone side are less than 90°. Connection points of the first vertical intermediate bones to the upper frame bone are present only in this range.

A liquid lead storage battery includes a grid-like substrate of a positive electrode current collector that includes a frame bone forming four sides of a rectangular shape. Intermediate bones are connected to and present inward of the frame bone. At least some vertical intermediate bones present in a range between the center between a pair of vertical frame bones and the first vertical frame bone, which is the vertical frame bone on the side where a lug is absent, are first vertical intermediate bones extending from the lower to the upper frame bone sides while obliquely expanding from each other, and directly reach an upper frame bone. Angles formed by the first vertical intermediate bones and the upper frame bone on the first vertical frame bone side are less than 90°. Connection points of the first vertical intermediate bones to the upper frame bone are present only in this range.

An electrochemical battery is disclosed. The electrochemical battery has an electrode plate comprising a frame and a generally flat grid connected to the frame, the frame comprising at least a top frame member having a contact lug, wherein the grid comprises a plurality of grid wires and a plurality of window-like open areas between the grid wires, further comprising an active mass within the open areas and/or on the grid wires, wherein the electrode plate comprises on one outer surface or on both opposing outer surfaces of the active mass a pattern of grooves, wherein the grooves extend diagonally from a position closer to the top frame member to a position further away from the top frame member. A method for producing an electrode plate is also disclosed.

An electrochemical battery is disclosed. The electrochemical battery has an electrode plate comprising a frame and a generally flat grid connected to the frame, the frame comprising at least a top frame member having a contact lug, wherein the grid comprises a plurality of grid wires and a plurality of window-like open areas between the grid wires, further comprising an active mass within the open areas and/or on the grid wires, wherein the electrode plate comprises on one outer surface or on both opposing outer surfaces of the active mass a pattern of grooves, wherein the grooves extend diagonally from a position closer to the top frame member to a position further away from the top frame member. A method for producing an electrode plate is also disclosed.

A lead-acid battery includes a positive electrode plate, a negative electrode plate, an electrolyte solution, and a polymer compound, in which the positive electrode plate includes a positive current collector and a positive electrode material, the negative electrode plate includes a negative current collector and a negative electrode material, the Ca content of the positive current collector is 0.13% by mass or less, and the polymer compound has a peak in a range of 3.2 ppm or more and 3.8 ppm or less in a chemical shift of .sup.1H-NMR spectrum, or the polymer compound contains a repeating structure of oxy C.sub.2-4 alkylene units.

An electrochemical battery is disclosed. The electrochemical battery has an electrode plate comprising a frame and a generally flat grid connected to the frame, the frame comprising at least a top frame member having a contact lug, wherein the grid comprises a plurality of grid wires and a plurality of window-like open areas between the grid wires, further comprising an active mass within the open areas and/or on the grid wires, wherein the electrode plate comprises on one outer surface or on both opposing outer surfaces of the active mass a pattern of grooves, wherein the grooves extend diagonally from a position closer to the top frame member to a position further away from the top frame member. A method for producing an electrode plate is also disclosed.

An electrochemical battery is disclosed. The electrochemical battery has an electrode plate comprising a frame and a generally flat grid connected to the frame, the frame comprising at least a top frame member having a contact lug, wherein the grid comprises a plurality of grid wires and a plurality of window-like open areas between the grid wires, further comprising an active mass within the open areas and/or on the grid wires, wherein the electrode plate comprises on one outer surface or on both opposing outer surfaces of the active mass a pattern of grooves, wherein the grooves extend diagonally from a position closer to the top frame member to a position further away from the top frame member. A method for producing an electrode plate is also disclosed.