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Variable-polarity lead-acid battery and using method thereof

A lead-acid battery and polarity-changing technology, which is applied in the direction of lead-acid battery, lead-acid battery electrode, secondary battery repair/maintenance, etc., can solve the problems of shortened battery life, reduce negative electrode polarization, and prolong battery life , the effect of reducing the potential

Inactive Publication Date: 2014-08-27
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Changing the polarity of lead-acid batteries is used in the early activation process of lead-acid batteries after sulfation failure. After reverse charging and activation, the failed lead-acid batteries will regain better capacity and charge-discharge performance in a short period of time. However, due to the large difference in the composition of the positive and negative electrodes of the lead-acid battery, some additives in the original negative electrode will be oxidized and invalid during the reverse charging process, which will greatly shorten the life of the battery after changing the polarity. Therefore, ordinary lead-acid batteries are strictly prohibited. Positive and negative polarity reversed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take carbon black 5%, carbon fiber 2%, carbon nanotube 0.5%, polyacrylonitrile short fiber 2%, MnO 2 2%, sodium lignosulfonate 0.2%, BaSO 4 0.3%, the balance is Pb powder and H 2 SO 4 (According to pure acid 42g / kgPb standard powder mixed with 1.4g / LH 2 SO 4 ), and paste on the Pb-2% Sb alloy grid to press into pole pieces, cured for 24h under the condition of 75°C high humidity (RH100%), using the externalization process to make a part of the prepared electrode plate into a positive electrode, a part It is turned into a negative electrode and finally assembled into a battery. Manually switch the battery polarity after every 3 charge and discharge cycles.

[0035] Put the battery at 0.5I 3 A constant current charging to 2.4V / cell, then charging at 2.4V constant voltage until the current is stable, let it stand for 30min, and then charge it with I 3 A current discharge to 1.65V / cell terminates, the above is a charge and discharge cycle. The test found that during...

Embodiment 2

[0039] Take acetylene black 10%, carbon fiber 3%, graphene 2%, polyacrylonitrile staple fiber 3%, TiO 2 10%, BaSO 4 2%, the balance is Pb powder and H 2 SO 4 (According to pure acid 42g / kgPb standard powder mixed with 1.4g / LH 2 SO 4 ), and paste on the Pb-5%Sn-0.1%Ca-Ce0.05% alloy grid to press into a pole piece, cured at 75 ℃ and high humidity (RH100%) for 24h, using the external chemical process to prepare A part of the electrode plate is turned into a positive electrode, and a part is turned into a negative electrode, and finally assembled into a battery. Manually switch the polarity after every 10 charge-discharge cycles.

[0040] Put the battery at 0.5I 3 A constant current charging to 2.4V / cell, then charging at 2.4V constant voltage until the current is stable, let it stand for 30min, and then charge it with I 3 A current discharge to 1.65V / cell terminates, the above is a charge and discharge cycle. The test found that during 400 cycles, the capacity of ordinary...

Embodiment 3

[0042] Take activated carbon 10%, carbon airgel 5%, carbon nanotube 2%, polyacrylonitrile short fiber 2%, RuO 2 5%, ZnO5%, BaSO 4 1%, the balance is Pb powder and H 2 SO 4 (According to pure acid 42g / kgPb standard powder mixed with 1.4g / LH 2 SO 4 ), and the paste is pressed on the porous lead grid (Pb-Sn10%) to make a pole piece, cured at 75°C and high humidity (RH100%) for 24 hours, and the prepared electrode plate is partially formed into a positive electrode by an external chemical process , a part of it becomes a negative electrode, and finally assembled into a battery. Manually switch the battery polarity after every 3 deep charge and discharge cycles.

[0043] Put the battery at 0.5I 3 A constant current charging to 2.4V / cell, then charging at 2.4V constant voltage until the current is stable, let it stand for 30min, and then charge it with I 3 A current discharge to 1.65V / cell terminates, the above is a charge and discharge cycle. The test found that during the ...

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Abstract

The invention provides a variable-polarity lead-acid battery and a using method of the variable-polarity lead-acid battery. Positive and negative plates of the lead-acid battery consist of the same grids and lead plasters, and after one or more times of charge-discharge cycle of the battery, the polarities of the positive and negative plates are exchanged. The variable-polarity lead-acid battery has the advantages that the problem of vitriolization of an ordinary lead-acid battery can be solved, the service life of the battery is prolonged, and the utilization ratio of active substances is increased at the same time, so that the charge receptivity and the discharge capacity of the battery are greatly improved.

Description

technical field [0001] The invention discloses a polarity-variable lead-acid battery and a use method thereof, belonging to the field of electrochemical energy storage devices. Background technique [0002] Since Gasten Plant invented lead-acid batteries in 1859, lead-acid batteries have been the most widely used products in the field of batteries, such as automobiles, locomotives, ships, airplanes, mobile communications and backup power supply equipment. . In the decades when new batteries such as nickel-cadmium batteries, nickel-hydrogen batteries, and lithium-ion batteries have been on the market, they can still firmly occupy most of the market share, which fully reflects the cost and safety of lead-acid batteries. advantages. At present, more than 95% of small hybrid electric vehicles and special electric vehicles use lead-acid batteries. As a micro and mild hybrid electric vehicle for gasoline-electric hybrid vehicles, lead-acid batteries have also been successfully ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/06H01M4/14H01M10/42
CPCY02E60/126Y02E60/10
Inventor 蒋良兴洪波赖延清贾明关翔李劼刘业翔
Owner CENT SOUTH UNIV
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