Non-aqueous electrolyte batteries

Abstract

The non-aqueous electrolyte battery comprises: a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the positive electrode, the separator, and the negative electrode are wound into a spiral. The positive electrode comprises a positive electrode active material and a porous metal mesh, and the thickness of the positive electrode is greater than or equal to 0.8 mm and less than or equal to 3 mm. The wall thickness T of the porous metal mesh satisfies 0.15 mm ≤ T ≤ 0.3 mm, and the center-to-center distance SW in the short-range direction and the center-to-center distance LW in the long-range direction of the porous metal mesh satisfy 6 mm. 2 ≤LW·SW≤20mm 2 , the feed width W of the porous metal mesh satisfies 0.15mm≤W≤0.3mm.

Claims

1. A non-aqueous electrolyte battery comprising: a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte solution, wherein the positive electrode, the separator, and the negative electrode are wound in a spiral shape. The positive electrode comprises a positive electrode active material and a porous metal mesh, The thickness of the positive electrode is not less than 0.8 mm and not more than 3 mm, The porous metal mesh is obtained by forming a plurality of cuts in a metal plate and expanding the cuts to form diamond-shaped meshes. The wall thickness T of the porous metal mesh corresponds to the thickness of the metal plate, the feed width W corresponds to the interval between the incisions, the center-to-center distance SW in the short-range direction corresponds to the length of the short diagonal of the diamond-shaped mesh, and the center-to-center distance LW in the long-range direction corresponds to the length of the long diagonal of the diamond-shaped mesh. The wall thickness T of the porous metal mesh satisfies 0.15mm≤T≤0.3mm, The center distance SW in the short-range direction and the center distance LW in the long-range direction of the porous metal mesh meet the requirements of 6 mm. 2 ≤LW·SW≤20mm 2 , The feed width W of the porous metal mesh satisfies 0.15 mm ≤ W ≤ 0.3 mm.

2. The nonaqueous electrolyte battery according to claim 1, wherein The SW is greater than 1.5 mm, and satisfies 1.5≤LW / SW≤2.

5.

3. The nonaqueous electrolyte battery according to claim 1, wherein A ratio T / W of the wall thickness T to the feed width W is greater than or equal to 0.5 and less than or equal to 2.

4. The nonaqueous electrolyte battery according to claim 1, wherein The average particle size of the positive electrode active material is greater than or equal to 30 μm and less than or equal to 60 μm.

5. The nonaqueous electrolyte battery according to claim 1, wherein The positive electrode active material contains Li x MnO2, where 0≤x≤0.05, The negative electrode includes at least one of metallic lithium and a lithium alloy.

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