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A kind of nickel-metal hydride battery and its manufacturing method

A nickel-metal hydride battery and the technology of its manufacturing method are applied in the manufacture of nickel storage batteries, alkaline storage batteries, batteries, etc., which can solve the problems of battery failure and battery discharge capacity decline, and achieve small internal resistance, reduce ohmic internal resistance, Effect of improving electrochemical activity and cycle life

Active Publication Date: 2018-10-16
HENGYANG BST POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A kind of nickel-metal hydride battery and its manufacturing method
  • A kind of nickel-metal hydride battery and its manufacturing method
  • A kind of nickel-metal hydride battery and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Positive active material Ni(OH) 2 The preparation adopts the complexation precipitation method, the concentration is 2.0mol / L ammoniacal liquor, the sodium hydroxide solution and the nickel sulfate, zinc sulfate, cobalt sulfate mixed salt solution and the mixed salt solution of nickel sulfate, zinc sulfate, cobalt sulfate and the mixing reaction under stirring, described mixing The concentration of nickel ions in the salt solution is 0.911mol / L, the concentration of zinc ions is 0.057mol / L, the concentration of cobalt ions is 0.032mol / L, the pH value is controlled at 10, the temperature is at 50°C, and the reaction time is 12h. The curing time is 12h, and the green Ni(OH) is obtained 2 Precipitation, pouring out the reaction solution, static layering, pouring off the upper clear night, washing with distilled water, and drying at 120 ° C until the water content of the sample is ≤ 0.5%, that is, the green positive electrode active material Ni(OH) is obtained 2 . The pos...

Embodiment 2

[0068] Positive active material Ni(OH) 2 The preparation adopts the complexation precipitation method, the concentration is 2.0mol / L ammoniacal liquor, the sodium hydroxide solution and the nickel sulfate, zinc sulfate, cobalt sulfate mixed salt solution and the mixed salt solution of nickel sulfate, zinc sulfate, cobalt sulfate and the mixing reaction under stirring, described mixing The concentration of nickel ions in the salt solution is 0.880mol / L, the concentration of zinc ions is 0.072mol / L, the concentration of cobalt ions is 0.048mol / L, the pH value is controlled at 11, the temperature is 55 °C, and the reaction time is 12h. The curing time is 12h, and the green Ni(OH) is obtained 2 Precipitation, pouring out the reaction solution, static layering, pouring off the upper clear night, washing with distilled water, and drying at 120 ° C until the water content of the sample is ≤ 0.5%, that is, the green positive electrode active material Ni(OH) is obtained 2 . The posit...

Embodiment 3

[0089] Positive active material Ni(OH) 2 The preparation adopts the complexation precipitation method, the concentration is 1.5mol / L ammoniacal liquor, the sodium hydroxide solution and nickel sulfate, zinc sulfate, cobalt sulfate mixed salt solution and mixed reaction under stirring with concentration, described mixing The concentration of nickel ions in the salt solution is 0.6285mol / L, the concentration of zinc ions is 0.0645mol / L, the concentration of cobalt ions is 0.0570mol / L, the pH value is controlled at 11, the temperature is 55 °C, the reaction time is 12h, and the The curing time is 12h, and the green Ni(OH) is obtained 2 Precipitation, pouring out the reaction solution, static layering, pouring off the upper clear night, washing with distilled water, and drying at 120 ° C until the water content of the sample is ≤ 0.5%, that is, the green positive electrode active material Ni(OH) is obtained 2 . The positive active material Ni(OH) 2 The zinc content is 6.0±0.3wt...

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Abstract

The nickel-hydrogen battery disclosed by the present invention comprises an iron case and a nickel electrode, a hydrogen electrode, a diaphragm, and an electrolyte installed in the iron case, and its nickel electrode is made of foamed nickel as a base material, and the inner space of the foamed nickel is filled with positive electrode active material Ni ( OH)2, conductive agent, additive and binder; the hydrogen electrode is made of porous nickel-plated steel strip or copper mesh or foamed nickel as the matrix material, and the porous nickel-plated steel strip or copper mesh or foamed nickel is coated with negative electrode active material to store hydrogen Alloy powder, conductive agent, additive and binder; electrolyte is a mixture of potassium-rich alkaline aqueous solution and sodium tungstate or tungstic acid crystals. The invention also discloses a preparation method of the nickel-hydrogen battery. The Ni-MH battery disclosed in the present invention has a maximum ratio of 0.2C discharge capacity to room temperature capacity of 70% to 80% in an environment of -45°C, and a maximum ratio of 0.2C discharge capacity to room temperature capacity of a Ni-MH battery in an environment of 70°C. Up to 85-95%. Moreover, the preparation method is simple and suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a nickel-metal hydride 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 discharge capacity of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/30H01M10/28H01M2/16H01M2/26H01M4/62H01M4/74H01M50/44H01M50/528H01M50/533
CPCH01M4/62H01M4/623H01M4/624H01M4/745H01M10/28H01M10/30H01M2220/30H01M2220/10H01M50/409H01M50/531Y02E60/10Y02P70/50
Inventor 马国锋曹远麟
Owner HENGYANG BST POWER