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Low-temperature electrolyte of nickel-metal hydride battery

A nickel-metal hydride battery and electrolyte technology, which is applied in nickel storage batteries, alkaline electrolytes, aqueous electrolytes, etc., can solve the problems of weakened activity, scrapped batteries, and reduced molar concentration of electrolytes, and achieves the effect of avoiding weakening of activity.

Inactive Publication Date: 2018-06-29
东莞市朗泰通实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature is too low, the alkaline substances in the electrolyte of the nickel-metal hydride battery will crystallize and precipitate, causing the molar concentration in the electrolyte to further decrease, so that the activity will continue to weaken, a vicious cycle, and even cause the battery to be scrapped

Method used

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  • Low-temperature electrolyte of nickel-metal hydride battery
  • Low-temperature electrolyte of nickel-metal hydride battery

Examples

Experimental program
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Embodiment 1

[0028] Potassium hydroxide 8mol / L; lithium hydroxide 0.1mol / L; calcium chloride 0.1mol / L; high-carbon fatty alcohol polyoxyethylene ether 0.05mol / L; chromate 0.01mol / L.

Embodiment 2

[0030] Potassium hydroxide 9mol / L; lithium hydroxide 0.2mol / L; calcium chloride 0.2mol / L; high-carbon fatty alcohol polyoxyethylene ether 0.07mol / L; chromate 0.02mol / L.

Embodiment 3

[0032] Potassium hydroxide 10mol / L; lithium hydroxide 0.3mol / L; calcium chloride 0.4mol / L; high-carbon fatty alcohol polyoxyethylene ether 0.1mol / L; chromate 0.04mol / L.

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Abstract

The invention provides low-temperature electrolyte of a nickel-metal hydride battery. The low-temperature electrolyte is prepared from electrolyte and an additive, wherein the electrolyte is preparedfrom potassium hydroxide and lithium hydroxide; the additive is prepared from soluble calcium salt, a non-ionic surfactant and an inorganic corrosion inhibitor; the concentration of each component ofthe additive in the electrolyte is as follows: the concentration of the soluble calcium salt is 0.1 to 1mol / L; the concentration of the non-ionic surfactant is 0.05 to 0.15mol / L; the concentration ofthe inorganic corrosion inhibitor is 0.01 to 0.08mol / L. The low-temperature electrolyte provided by the invention has no separated-out potassium hydroxide crystals at the temperature of -40 DEG C andis matched with proper positive and negative electrode materials to prepare the battery for testing; 80 percent of a rated capacity can be realized after the battery is standardly charged and discharged at -40 DEG C.

Description

technical field [0001] The invention relates to the field of nickel-hydrogen batteries, in particular to a low-temperature electrolyte for nickel-hydrogen batteries. Background technique [0002] Nickel-metal hydride battery is a storage battery made of hydrogen storage alloy and spherical nickel hydroxide. It has higher power reserve than nickel-cadmium battery, lighter weight than nickel-cadmium battery, long service life and no memory effect. , Since the nickel-metal hydride battery does not contain cadmium, it has no pollution to the environment. Therefore, Ni-MH battery is widely used as a kind of green and environment-friendly rechargeable battery in today's society. The disadvantage of Ni-MH batteries is that the price is more expensive than Ni-Cd batteries, the performance is worse than Li-ion batteries, and Ni-MH batteries have no memory effect. The positive active material of the Ni-MH battery is nickel hydroxide, the negative active material is a metal oxide, al...

Claims

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Application Information

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IPC IPC(8): H01M10/26H01M10/30
CPCH01M10/26H01M10/30H01M2300/0014Y02E60/10
Inventor 肖中平何立辉李兴松王华锋邓通
Owner 东莞市朗泰通实业有限公司
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