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Nickel-hydrogen high-temperature super large capacity battery

A high temperature, battery technology, applied in nickel batteries, battery electrodes, alkaline batteries, etc., can solve the problems of shortening battery life, thermal runaway, and accelerated oxygen evolution reaction, and achieve high power performance, high temperature charging performance. Effect

Inactive Publication Date: 2008-03-12
邹平铭波电源有限公司
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  • Summary
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AI Technical Summary

Problems solved by technology

The standard potential of the former reaction is 0.490V, and the standard potential of the latter reaction is 0.401V. The two are relatively close, so the precipitation of oxygen during the charging process is thermodynamically inevitable. The oxygen precipitated from the positive electrode recombines on the negative electrode, releasing a large amount of The temperature in the battery rises further, and the oxygen evolution overpotential further decreases, resulting in a vicious cycle and even thermal runaway. Therefore, the speed of the oxygen evolution reaction as a side reaction after the temperature rises is particularly significant, which reduces the charging efficiency of the positive electrode. , the higher the temperature, the more obvious this phenomenon is, the precipitation of oxygen and the rise of battery temperature will lead to intensified oxidation and corrosion of the negative electrode hydrogen storage alloy, aging of the diaphragm, and shortened battery life

Method used

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Embodiment Construction

[0014] The technical process of implementing the object of the present invention is:

[0015] Combining powder → positive and negative electrode sheet manufacturing → positive and negative electrode sheet finishing → winding → assembly → chemical formation → testing.

[0016] Positive electrode: Ni(OH) 2 As the main body, add additives in the positive electrode, the additive is a mixture of calcium oxide, thulium oxide, and titanium oxide, and the addition amount is 1%, 2%, and 2% of the total amount of the positive electrode material; add cobalt oxide in the positive electrode material, The added amount is 17% of the total amount of positive electrode materials.

[0017] Ternary electrolyte: its ratio: H 2 O: KOH: NaOH: LiOH = 10: 3.5 ~ 4: 2 ~ 3.5: 0.1; the electrolyte is AA batteries as an example, and the optimal dosage is 3 ~ 3.5g per battery.

[0018] Diaphragm: sulfonated nylon diaphragm.

[0019] Compared with the existing batteries, the high-temperature battery in ...

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Abstract

The invention relates to the cell field, which is a Ni-MH high-temperature cell with ultra high capacity. The invention provides a Ni-MH high-temperature cell with ultra high capacity worked under high power and high capacity condition. The technical solution adopted in the invention is: a Ni-MH high-temperature cell with ultra high capacity which comprises anode based on Ni(OH)2, a septum and alkalescency electrolyte, an additive added into the anode for preventing oxygen separating out and bearing high temperature in anode material. The additive is a mixture of calcium oxide, thulium oxide and titanium oxide. The invention is characterized in excellent performance of high temperature electrification and high power.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a nickel-hydrogen high-temperature ultra-large-capacity battery. Background technique [0002] With the development of the market economy, people's growing material and cultural needs, and the continuous improvement of living standards, mobile devices such as digital cameras and laptops have entered thousands of households at a growth rate of 5% and 10% respectively. Various emergency lights, Household electric tools are also gradually entering the family. Mobile devices such as laptops and digital cameras will become necessary for business, entertainment, and life. In the field of power sources used by the above-mentioned mobile devices, most of the power products are rechargeable and environmentally friendly Ni-MH batteries, and have a wide range of applications. development space. However, since most electrical appliances work under high-power conditions and the external environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/32H01M10/30H01M10/26H01M2/16H01M50/411
CPCY02E60/124Y02E60/10
Inventor 李信
Owner 邹平铭波电源有限公司
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