Super-wide-temperature-range nickel-hydrogen battery and manufacturing method therefor

Abstract

The invention discloses a super-wide-temperature-range nickel-hydrogen battery. The battery comprises an iron shell as well as a nickel electrode, a hydrogen electrode, a diaphragm and an electrolyte solution mounted in the iron shell, wherein the nickel electrode takes foam nickel as a substrate material; the space in foam nickel is filled with a positive electrode active substance Ni(OH)2, a conductive agent, an additive and a binder; the hydrogen electrode takes a porous nickel-plated steel belt, a copper net or foam nickel as a substrate material; the porous nickel-plated steel belt, the copper net or foam nickel is coated with a negative electrode active substance, namely, hydrogen storage alloy powder, the conductive agent, the additive or the binder; and the electrolyte solution is a mixture of a potassium-rich alkaline aqueous solution and sodium tungstate or tungstic acid crystals. The invention furthermore discloses a manufacturing method for the super-wide-temperature-range nickel-hydrogen battery. According to the super-wide-temperature-range nickel-hydrogen battery disclosed by the invention, the ratio of 0.2C discharge capacity to normal-temperature capacity maximally can reach 70-80% in an environment with the temperature of -45 DEG C; and the ratio of 0.2C discharge capacity to normal-temperature capacity of the nickel hydrogen battery maximally can reach 85-95% in an environment with the temperature of 70 DEG C. Moreover, the manufacturing method is simple and suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of batteries, in particular to an ultra-wide temperature nickel-hydrogen battery and a manufacturing method thereof. Background technique [0002] Ni-MH batteries are widely used because of their high energy ratio, long service life, wide operating temperature, no pollution, and no memory effect. However, the operating environment temperature is generally in the range of -20°C to 50°C. According to domestic and foreign literature reports, the ratio of the discharge capacity of the Ni-MH battery to the normal temperature capacity can reach up to 65% to 75% in the environment of -20°C. At or below, the battery basically cannot discharge electricity; at 50°C, the ratio of the discharge capacity of the Ni-MH battery to the room temperature capacity can reach up to 90-95%, but as the temperature rises, the battery discharge capacity drops sharply. At 70°C, The discharge capacity is only 40-50% of the normal temperature di...

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Problems solved by technology

However, the operating environment temperature is generally in the range of -20°C to 50°C. According to domestic and foreign literature reports, the ratio of the discharge capacity of the Ni-MH battery to the normal temperature capacity can reach up to 65% to 75% in the environment of -20°C. At or below, the battery basically cannot discharge electricity; at 50°C, the ratio of the discharge capacity of the Ni-MH battery to the room temperature capacity can reach up to 90-95%, but as the temperature rises, the battery discharge capacity drops sharply. At 70°C, The discharge capacity is only 40-50% of the normal temperature discharge capacity of the battery

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