A study of current and potential distributions on tubular positive plate

Guo, Yonglang; Li, Wei-Zhen; Zhao, Le

doi:10.1016/s0378-7753(02)00691-2

Cited by 10 publications

(9 citation statements)

References 25 publications

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“…Distributions of current density and potential at high discharge rate (3 C) When a positive plate was discharged at 36 A (3 C rate), the discharge capacity was only 3.9 Ah [5]. Under the same conditions, the discharge capacity of the negative plate was 4.6 Ah at the terminal potential of )0.8 V.…”

Section: Resultsmentioning

confidence: 97%

“…Kra´l et al [3,4] determined the current distribution over the plate surfaces in the course of discharge mathematically by using the equivalent circuit method. In our previous work [5,6], the distributions of current density and potential over the positive plate surfaces were investigated by measuring the IR drop in the H 2 SO 4 solution between the positive and negative plates.…”

Section: Introductionmentioning

confidence: 99%

“…Studies of the distributions of current density and potential in lead-acid batteries have mainly focused on the grid and the positive plates [1][2][3][4][5][6][7][8][9][10][11][12]. Little attention has been paid to the negative plates.…”

Section: Introductionmentioning

confidence: 99%

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Studies of current and potential distributions on lead-acid batteries. II. Discharge of automotive negative plates

Zhang

Guo

2004

Journal of Applied Electrochemistry

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The distributions of current density and potential of automotive negative plate were studied by measuring the IR drop in the H 2 SO 4 solution between the positive and negative plates. At the beginning of discharge, the distributions of current density, potential and polarization resistance are uniform. In the later stage, high polarization appears at the top and bottom of the negative plate and the current density falls very quickly in these regions. Therefore, high polarization resistance of the active mass increases very quickly at both the top and bottom of the negative plate. It is mainly caused by the passivation of the negative plate which obviously decreases by constant current charge. At low temperature, at the end of 3 C discharge, the highest polarization and the lowest current density appear farthest away from the lug and at the top of the negative plate.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Studies of current and potential distributions on lead-acid batteries. II. Discharge of automotive negative plates

Zhang

Guo

2004

Journal of Applied Electrochemistry

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“…However, softening and shedding of PAM in flat plates remain causes for gel battery failure. Since softening and shedding of the active materials in tubular positive plates can be alleviated or prevented, lead-acid batteries with tubular positive plates may present flatter discharge curves, longer cycle life and larger capacity than those with flat plates [1][2][3][4][5][6]. It is expected that gel batteries with tubular positive plates can display excellent performance.…”

Section: Introductionmentioning

confidence: 99%

Application of a novel gelled-electrolyte in valve-regulated lead-acid batteries with tubular positive plates

Zheng

Wang

Xian-xian³

et al. 2007

J Appl Electrochem

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A polysiloxane-based gel electrolyte (PBGE) was prepared and used as a novel gel electrolyte in valveregulated lead-acid (VRLA) batteries with tubular positive plates. Cyclic voltammetry (CV) and scanning electron microscopy (SEM) indicated that PBGE is more stable than fumed-silica gel electrolyte (FSGE). The properties of AGM (absorptive glass mat)-PBGE and PVC-FSGE tubular batteries were investigated by electrochemical techniques. The results showed that the AGM-PBGE tubular batteries have higher initial discharge capacity and better high-low temperature performance than PVC-FSGE. The improved electrochemical performance of the AGM-PBGE batteries may result from the high charge efficiency and the open three-dimensional network structure of PBGE. SEM and X-ray diffraction (XRD) spectroscopy showed that PBGE facilitates the conversion of the active-mass to lead dioxide, presenting a high formation efficiency. The addition of PBGE instead of FSGE not only simplifies the manufacturing process of tubular gel batteries, but also improves the utilization efficiency of positive active material (PAM), thus enhancing the battery performance and reducing the manufacturing cost.

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“…22,23 In our recent work, an in situ electrochemical scan technique has been established to study the current and potential distributions of the tubular positive plate. 24,25 The formation of the tubular positive plate can be divided into three stages in which the formation rate is controlled by the conductivity of the paste and electrochemical reactions individually or combined together. And the distributions of the current density, potential and polarization resistance are uneven in the earlier stage of the formation.…”

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confidence: 99%

Current and Potential Distributions of Large-Sized Positive Plate in Its Formation of Lead-Acid Batteries

Guo

Wu²,

Zhang³

2005

J. Electrochem. Soc.

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The current and potential distributions on the large-sized flat positive plate of lead-acid batteries in its formation have been studied by an in situ electrochemical scan technique. The formation can be divided into three stages. The first is before 15% charge amount. At this stage, the conductivity of the positive paste is dominant. At the second stage, from about 15 to 62% charge, the formation rate depends on both the electrochemical reactions and ohmic polarization. At the final stage, the electrochemical reactions are a rate-limiting step. At the beginning of the formation, the distributions of the potential, current and polarization resistance are uneven, depending on the evolution of the conductive PbO2 zones. In comparison with the tubular positive plate, the distributions of potential and current are more uniform in the formation of the flat positive plate and the polarization is much smaller. The violent oxygen bubble evolution at the beginning will result in high contact resistance of local active mass. © 2005 The Electrochemical Society. All rights reserved.

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A study of current and potential distributions on tubular positive plate

Cited by 10 publications

References 25 publications

Studies of current and potential distributions on lead-acid batteries. II. Discharge of automotive negative plates

Studies of current and potential distributions on lead-acid batteries. II. Discharge of automotive negative plates

Application of a novel gelled-electrolyte in valve-regulated lead-acid batteries with tubular positive plates

Current and Potential Distributions of Large-Sized Positive Plate in Its Formation of Lead-Acid Batteries

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