NOVELTY - A high energy sealed maintenance-free lead acid accumulator has anode plate, cathode plate, insulation film and electrolyte. The anode plate and cathode plate has anode grid and cathode grid which are formed using specific alloy materials, respectively.    USE - Lead acid accumulator is used for energy storage.    ADVANTAGE - The lead acid accumulator has high energy sealing property. The accumulator is maintenance free device.    DETAILED DESCRIPTION - A high energy sealed maintenance-free lead acid accumulator has anode plate, cathode plate, insulation film and electrolyte. The components of the anode grid alloy contains antimony (0.8-2.2%), arsenic (0.01-0.5%), cerium (0.001-0.05%), silver (0.002-0.05%), copper (0.001-0.5%), bismuth (0.01-0.5%) and remainder pure lead per 100 kg material of the anode grid alloy. The alloy material is melted in lead smelter. The anode grid is a double-fragment structure having thickness (H') of (H-0.5)/2, where H is thickness of the whole anode grid. The melted anode grid alloy is cast onto anode grid mold such that to form anode grid having width of A, height of B and thickness of H'. The compound of anode active material is made of 100 kg lead powder added with sulfate solution (15 L) of 1.08-1.25 g/cm3 concentration, isotropic plumbago (100-1000 g), cobalt sulfate (100-800 g), acrylic stable fiber (100-500 g), alumina powder (100-800 g) and Picconol (100-800 g), is stirred evenly in a paste mixer and coated on the anode grid to form anode plate by solidification. A plastic frame with 0.5 mm thickness is formed. Width of the plastic frame is the same as that of the border of the anode grid. Width and height of the plastic frame is the same as that of the grid. Two sides of the plastic frame are coated with adhesive. Two anode grids with H' thickness are bonded at two sides of the plastic frame with 0.5 mm gap. Two anode plates with H' thickness are arranged on the two sides. A plastic material with a hole and having thickness of 0.1 mm is equipped in the 0.5 mm gap. Hole of the plastic material is filled with glass fiber cottons. An anode plate with 0.5 mm thickness is formed. After assembling of battery, the gap is filled with sulfuric acid electrolyte. Components of the cathode grid alloy are calcium (0.01-0.5%), aluminum (0.01-0.5%), copper (0.01-0.5%), bismuth (0.01-0.5%) and tin (0.01-1.5%) and remainder pure lead per 100 kg material of the cathode grid alloy. The cathode grid has width of A, height of B and and thickness H. The cathode grid alloy is melted in the lead smelter and cast in the negative grid mould to form the cathode grid. The compound of the cathode active material is made of 100 kg lead powder added with sulfate solution (12 L) of 1.1-1.3 g/cm3, barium sulfate (100-800 g), humic acid (100-800 g), Lignosol TSD (RTM: sulfur containing lignin) (100-900 g), acrylic stable fiber (100-600 g) and Alkanol XC (RTM: surfactant) (100-900 g). The compound of the cathode active material is stirred evenly in a paste mixer and coated on the cathode grid to form cathode plate by solidification. Insulation films are added between the prepared anode and cathode plates, to assemble a battery and an electrolyte is injected. The components of the electrolyte is phosphoric acid (1%), cadmium sulfate (0.05-0.1%), disodium sulfate (0.01-0.1%) and zinc sulfate (0.01-0.1%) added in sulfuric acid solution (1.26-1.32 g/cm3).