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Nickel hydrogen charging battery

A rechargeable battery, nickel metal hydride technology, applied in the direction of nickel storage battery, battery electrode, alkaline storage battery, etc., can solve the problem of large self-discharge of nickel-hydrogen battery, and achieve the effect of high capacity retention rate and excellent self-discharge performance

Active Publication Date: 2008-09-17
LEXEL BATTERYSHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a nickel-hydrogen rechargeable battery, the technical problem to be solved is to reduce the large self-discharge problem in the storage process of the nickel-hydrogen battery

Method used

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Examples

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Effect test

preparation example Construction

[0031] The preparation method of Ni-MH rechargeable battery of the present invention is carried out according to the following steps:

[0032] 1. In spherical Ni(OH) 2 Add cobalt hydroxide, and at least one of oxides or hydroxides of titanium, yttrium, erbium, thulium, ytterbium, lutetium, calcium or barium elements as needed, and add an appropriate amount of binder and mix evenly, then coat Cover the electrode substrate with nickel foam, dry, roll and cut, weld the electrode lug, and process it into a positive electrode plate.

[0033] 2. Coat the slurry of alloy powder and binder on the electrode substrate. The electrode substrate is nickel foam, punched nickel-plated steel strip, punched nickel strip, punched copper strip, copper mesh, foamed copper or foam Brass, dried, rolled and slit to obtain the negative plate.

[0034] 3. Winding the positive electrode plate, the polyolefin separator, and the negative electrode plate to obtain the electrode core.

[0035] 4. Put th...

Embodiment 1

[0037] Embodiment 1, the preparation of positive pole piece: the spherical Ni(OH) of 100 parts by weight 2 , 5 parts by weight of cobaltous oxide, 0.1 parts by weight of TiO 2 , 5 parts of weight of carboxymethyl cellulose dispersion (containing 1% carboxymethyl cellulose), 1 part of weight of polytetrafluoroethylene PTFE dispersion (solid content is 60%), 20 parts of weight of water mixing Make a paste slurry, fill the slurry into the nickel foam with a surface density of 300 g / m2 and weld a nickel strip-shaped drain terminal on one side, then dry, roll, and cut to obtain the size 80 mm x 40 mm x 0.85 mm positive pole piece, in which pure spherical Ni(OH) 2 The content is 7.5 grams. Others are the same as the case of test battery A. Finally, an AA-sized nickel-metal hydride battery D1 was produced.

Embodiment 2

[0038] Embodiment 2, the preparation of positive pole sheet: the spherical Ni(OH) of 100 parts by weight 2 , 5 parts by weight of cobaltous oxide, 5 parts by weight of TiO 2, 5 parts of weight of carboxymethyl cellulose dispersion (containing 1% carboxymethyl cellulose), 1 part of weight of polytetrafluoroethylene PTFE dispersion (solid content is 60%), 20 parts of weight of water mixing Make a paste slurry, fill the slurry into the nickel foam with a surface density of 300 g / m2 and weld a nickel strip-shaped drain terminal on one side, then dry, roll, and cut to obtain the size 80 mm x 40 mm x 0.85 mm positive pole piece, in which pure spherical Ni(OH) 2 The content is 7.5 grams. Others are the same as the case of test battery A. Finally, an AA-sized nickel-metal hydride battery D2 was produced.

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PUM

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Abstract

The present invention provides a nickel-metal hydride charge battery, which resolves the problem of reducing the high self charge in the storaging course of the nickel-metal hydride battery. The invention adopts following technical scheme: a nickel-metal hydride charge battery includes a cathode, a diaphragm, an electrolyte and an anode, the electrolyte contains KOH solution, the cathode contains at least one oxide or hydroxide of titanium, yttrium, erbium, thulium, ytterbium, lutetium, calcium or barium element, the mass ratio of the content to the whole cathode active material is 0.1-10%. Compared with the prior art, the battery cathode contains oxide or hydroxide of titanium, yttrium, erbium, thulium, ytterbium, lutetium, calcium or barium element, the month capacity retention rate of the battery is increased more than 90%, the year capacity retention rate is increased more than 80%, having excellent self-discharge performance and having high capacity retention rate.

Description

technical field [0001] The invention relates to a rechargeable battery, in particular to a nickel-metal hydride secondary rechargeable battery. Background technique [0002] At present, compared with the widely used disposable zinc-manganese batteries, nickel-hydrogen rechargeable batteries can only be used once because they can be recycled, which has great advantages in terms of environmental protection and resources. However, Ni-MH rechargeable batteries currently have a relatively large disadvantage: the monthly self-discharge rate during battery storage is as high as 30-40%, and the annual capacity retention rate is only below 20%. The annual capacity retention rate of primary zinc-manganese batteries is generally 80%. Above, so the Ni-MH rechargeable battery must solve the problem of large self-discharge in order to give full play to its role. [0003] Chinese Patent Authorization Announcement No. CN2798320Y "Electrode Core of Alkaline Secondary Battery and Alkaline Se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/30H01M10/26H01M10/24H01M4/32H01M4/36H01M4/48
CPCY02E60/124H01M4/24H01M4/38H01M4/364H01M4/32Y02E60/10
Inventor 高学锋廖奭谢勋杨彦秋
Owner LEXEL BATTERYSHENZHEN
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