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Precharging technique for forming nickel hydrogen battery

A nickel-metal hydride battery, pre-charging technology, applied in the direction of secondary battery charging/discharging, alkaline battery electrodes, alkaline batteries, etc., can solve problems such as battery capacity loss, reduce AC internal resistance and DC internal resistance, improve Consistency of cobalt conversion, effect of improving shelf life performance

Inactive Publication Date: 2007-02-21
INNER MONGOLIA RARE EARTH OVONIC HIGH POWER MH NI BATTERY CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, if the battery is stored at a relatively high temperature for a relatively short period of time, the battery also suffers from this capacity loss

Method used

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  • Precharging technique for forming nickel hydrogen battery
  • Precharging technique for forming nickel hydrogen battery
  • Precharging technique for forming nickel hydrogen battery

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Embodiment Construction

[0036] The nickel-hydrogen battery formation method of the present invention comprises the following steps: 1. provide the assembled nickel-hydrogen battery, and this battery comprises Ni(OH) 2 The positive plate composed of Co(II) compound, ②5 hours after assembly, the current density is ≤20mA / cm 2 (refers to the precharge relative to the positive plate area). ③The positive plate of the battery contains substances capable of redox reversible reactions, such as Ni(OH) 2 . The positive plate preferably comprises a nickel foam substrate, and the cell can be assembled using any conventional assembly technique, Ni(OH) 2 It can contain Co, Zn, Mn, Al and other element doping, and the nickel foam substrate preferably has a PPI of 80-110. Once the battery assembly is completed, the battery is stored at no lower than room temperature for about 3 to 8 hours, and then a pre-charging process is performed, followed by a 16-hour shelf life at no lower than room temperature. During this ...

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Abstract

Characters of the invention are as followings: assembled battery includes positive plate composed of compounds Ni(OH)2 and Co(II), and metal Co; in room temperature, or higher than room temperature, batteries are laid aside; next, precharging battery by using current density less than and equal to 20mA / cm2 based on area of positive plate as reference; then, batteries are laid aside in late stage in room temperature, or higher; afterwards, carrying out constant current charge for second time, and then discharging; carrying out constant current charge for second cycle, which includes two segments of constant current charge; finally, carrying out constant current charge for third cycle identical to the said second cycle. The invention raises consistency of quantity of converting cobalt, reduces AC internal resistance and DC internal resistance of battery, delays lowering OCV speed from 15%-20% to 5% of capacity attenuation when battery is laid aside at discharging state.

Description

1. Technical field [0001] The invention relates to a nickel-hydrogen battery pre-charging formation process, and the formation of alkaline nickel-hydrogen secondary batteries, in particular to the Co(III) conductive network in the positive plate of the nickel-hydrogen secondary battery on the electrochemically active material nickel hydroxide particles The invention relates to the formation of the surrounding area, relates to an initial charging method in the storage period before the nickel-metal hydride battery is formed, and belongs to the field of basic electrical components. 2. Background technology [0002] In recent years, the rapid development of electronic technology has led to the rapid development of electronic devices. These portable electronic devices require large-capacity secondary batteries as power sources. The secondary batteries that meet this requirement include nickel-cadmium batteries and nickel-hydrogen batteries. They all use coated The clad nickel po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/28H01M10/44H01M4/24
CPCY02E60/124Y02E60/10Y02P70/50
Inventor 徐绍萍梁万龙张忠杨永刚曹生彪张卫华马逸君张兴许国强邢志强张卫刘伟贾春明刘东
Owner INNER MONGOLIA RARE EARTH OVONIC HIGH POWER MH NI BATTERY CO
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