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High temperature composite additive agent for nickel base charging battery

A composite additive and rechargeable battery technology, which is applied to battery electrodes, secondary batteries, alkaline battery electrodes, etc., can solve problems such as failure to achieve normal use, and achieve the effects of widening the application field, simple operation, and improved conversion efficiency

Active Publication Date: 2008-01-30
LEXEL BATTERYSHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of these technical means has obvious effects on improving the high-temperature charging performance of nickel-based rechargeable batteries, for trickle charging at 80°C, that is, charging with a current of 0.05 times for 48 hours, the capacity utilization rate can only reach 40%. Still can not reach the level of normal use, the trickle charge conversion efficiency of nickel-based rechargeable batteries at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first embodiment, the production of nickel anode: according to the mass ratio of spherical Ni(OH) 2 100 copies, ErO 2 2.5 parts, TiO 2 2.5 parts and 30 parts of 1% binder EMC solution were mixed to form a paste slurry, filled into the foamed nickel matrix, dried, rolled, and cut into the positive electrode sheet of the No. 7 600mAh battery. The production of the negative electrode: 100 parts of the negative electrode active material hydrogen storage alloy MmNi5, 12.0 parts of the 2.75% binder EMC and the binder solution are mixed into a paste slurry, and then coated on a 0.04mm thick nickel-plated steel strip. Dry, roll, and cut into the negative electrode sheet of No. 7 600mAh battery size. The production of the battery: a polypropylene separator is sandwiched between the nickel positive and negative electrodes, wound into a spiral pole piece group, the pole piece is assembled into a circular metal shell, and the ternary electrolyte of KOH, NaOH, and LiOH is injected. ...

Embodiment 2

[0026] The second embodiment, the production of nickel anode: according to the mass ratio of spherical Ni(OH) 2 100 parts, Ca(OH) 2 2.5 parts, TiO 2 2.5 parts and 30 parts of 1% binder EMC solution were mixed to form a paste slurry, filled into the foamed nickel matrix, dried, rolled, and cut into the positive electrode sheet of the No. 7 600mAh battery. The production of the negative electrode: 100 parts of the negative electrode active material hydrogen storage alloy MmNi5, 12.0 parts of the 2.75% binder EMC and the binder solution are mixed into a paste slurry, and then coated on a 0.04mm thick nickel-plated steel strip. Dry, roll, and cut into the negative electrode sheet of No. 7 600mAh battery size. The production of the battery: a polypropylene separator is sandwiched between the nickel positive and negative electrodes, wound into a spiral pole piece group, the pole piece is assembled into a circular metal shell, and the ternary electrolyte of KOH, NaOH, and LiOH is injecte...

Embodiment 3

[0027] The third embodiment, the production of nickel positive electrode: according to the mass ratio of spherical Ni(OH) 2 100 parts, Ca(OH) 2 2.5 copies, ErO 2 2.5 parts and 30 parts of 1% binder EMC solution are mixed into a paste slurry, filled into the foamed nickel matrix, dried, rolled, and cut into a positive electrode sheet for a No. 7 600mAh battery. The production of the negative electrode: 100 parts of the negative electrode active material hydrogen storage alloy MmNi5, 12.0 parts of the 2.75% binder EMC and the binder solution are mixed into a paste slurry, and then coated on a 0.04mm thick nickel-plated steel strip. Dry, roll, and cut into the negative electrode sheet of No. 7 600mAh battery size. The production of the battery: a polypropylene separator is sandwiched between the nickel positive and negative electrodes, wound into a spiral pole piece group, the pole piece is assembled into a circular metal shell, and the ternary electrolyte of KOH, NaOH, and LiOH is i...

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Abstract

The invention discloses a high-temperature compound additive for nickel-base dischargeable batteries and aims at solving the technical problem of improving the transformation efficiency of the ting-current charging of the batteries in high temperature. The high-temperature compound additive for nickel-base dischargeable batteries of the invention comprises the quality group that in the simple substance or the compounds of the rare earth elements, the simple substance or the compounds of the IVB group elements and the simple substance and the compounds of the IIA group elements, one substance in any of the two groups / classes occupies the portion of 0.1-10, and the nickel hydroxide occupies 100 portions. Compared with the prior art, by adding the composite high-temperature additive, the invention has the advantages that the invention greatly reduces the transformation potential of the positive active material and improves the over-potential for oxygen evolution, which improves the transformation efficiency of ting-current charging in high temperature by 20 percent to 50 percent, realizes the normal use of batteries in the environment of 80 DEG C and widens the application field of the batteries, and that the manufacturing processes, the structure of the batteries coincide with traditional nickel-hydrogen batteries, and the operation is simple.

Description

Technical field [0001] The invention relates to an additive for rechargeable batteries, particularly an additive for nickel-based rechargeable batteries. Background technique [0002] Nickel-based batteries, including nickel-metal hydride, nickel-cadmium, and nickel-zinc, rechargeable batteries with nickel hydroxide / nickel oxyhydroxide as the positive electrode have high energy density, long life, small size, light weight, convenient use, safe, reliable and economical The advantages of it have been more and more widely used in various fields. However, its charging performance at high temperature has defects, which restricts the application field of this type of battery. The main problem is low high temperature charging efficiency. Ordinary nickel-based batteries are trickle charged in an environment above 45°C, and their capacity is only their nominal capacity. 50% or less; in the fields of emergency lighting, outdoor solar applications and HEV, the working environment of the bat...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/32
CPCY02E60/124H01M4/62H01M10/345H01M4/32Y02E60/10
Inventor 高学锋谢勋张平廖奭杨彦秋
Owner LEXEL BATTERYSHENZHEN
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