Method for manufacturing ultra-high temperature long-service life nickel-hydrogen batteries

Abstract

The invention provides a method for manufacturing ultra-high temperature long-service life nickel-hydrogen batteries. The method comprises the following steps: manufacturing positive pole pieces; manufacturing negative pole pieces. The method has the benefits that due to the application of a positive pole novel material, a negative pole novel material and a negative pole protection material, the 80-degree high-temperature efficiency is 80% or above; by acquiring the 80-degree high-temperature high charging efficiency, the efficient conversion of electric energy and discharging chemical energy from ordinary temperature to high temperature (20-80 DEG C) is guaranteed, generation of side reactions is greatly controlled, the abundant alkali liquor amount greatly postpones invalidation of batteries, the durable service (long service life) of batteries is ensured, the cycling service life reaches 1500 times (IEC 61951 division 7.5.1.2), and the batteries can satisfy the use requirements of electric devices in special fields, such as emergency lights, dust collectors and vehicle-mounted electric devices.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method for manufacturing ultra-high temperature and long-life nickel-hydrogen batteries. Background technique [0002] There are currently three problems with high-temperature nickel-metal hydride batteries. 1. High-temperature charging efficiency. The charging efficiency of high-temperature Ni-MH batteries at 55 degrees can generally reach 90%, but as the temperature increases, the charging efficiency decreases sharply. The conversion efficiency of charging and discharging at 70-80 degrees is about 40-50%; 2. Negative electrode alloys The powder is severely corroded. Under the action of strong alkali, some rare earth metals dissolve, and the capacity decay accelerates; 3. During recycling, the electrolyte in the closed structure dries up, and the battery directly fails. For Ni-MH high-temperature batteries used in the emergency light market, in the later use, the discharge time at 40...

AI Technical Summary

Problems solved by technology

At present, the charging efficiency of domestic Ni-MH high-temperature batteries can reach 80% at 70 degrees, but the floating charge resistance is poor.

The Ni-MH low self-discharge type developed by related companies has excellent cycle life (cycle life is 1000 times, IEC61951§7.5.1.2), but low temperature efficiency (charging efficiency at 55 degrees is 50-60%)

How to make environmentally friendly Ni-MH products (the high-temperature performance of lithium batteries commercialized at the same time as Ni-MH has not been effectively solved, and the cost is also more expensive than Ni-MH) to meet the above electrical requirements is a technical problem at this stage

In addition, domestic nickel-metal hydride batteries are generally doped with additives in the use of positive electrode materials, which makes it difficult to make mechanical stirring uniform, and there are few reports on the doping and anti-corrosion process of negative electrode alloys.

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