Self-equalization of cell voltages to prolong the life of VRLA batteries in standby applications

William Gerard Hurley; Yuk Sum Wong; Werner Hugo Wölfle

doi:10.1109/TIE.2009.2017094

Self-equalization of cell voltages to prolong the life of VRLA batteries in standby applications

William Gerard Hurley
, Yuk Sum Wong
, Werner Hugo Wölfle

Electrical & Electronic Engineering

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

25 Citations (Scopus)

Abstract

The valve-regulated lead-acid battery has been the work horse of standby applications for several decades. Float charging is normally implemented in these systems. However, float charging tends to overcharge the battery, causing water loss and grid corrosion which shorten the service life of the battery. This limitation may be avoided by using cell voltage equalization and temperature-compensated interrupted charge control (TCICC). Cell voltage equalization reduces the voltage distribution range over many cells, which, in turn, means that there are fewer cells with either overvoltage or undervoltage, both of which shorten the life of the battery. TCICC can increase the service life of the battery by avoiding overvoltage. Experimental evidence is presented to validate the new approach by comparing float charging and TCICC in terms of battery voltage equalization and temperature response.

Original language	English
Pages (from-to)	2115-2120
Number of pages	6
Journal	IEEE Transactions on Industrial Electronics
Volume	56
Issue number	6
DOIs	https://doi.org/10.1109/TIE.2009.2017094
Publication status	Published - 2009

Keywords

Batteries
Charge equalization
Emergency power supplies
Float charging
Temperature compensation

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10.1109/TIE.2009.2017094

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abstract = "The valve-regulated lead-acid battery has been the work horse of standby applications for several decades. Float charging is normally implemented in these systems. However, float charging tends to overcharge the battery, causing water loss and grid corrosion which shorten the service life of the battery. This limitation may be avoided by using cell voltage equalization and temperature-compensated interrupted charge control (TCICC). Cell voltage equalization reduces the voltage distribution range over many cells, which, in turn, means that there are fewer cells with either overvoltage or undervoltage, both of which shorten the life of the battery. TCICC can increase the service life of the battery by avoiding overvoltage. Experimental evidence is presented to validate the new approach by comparing float charging and TCICC in terms of battery voltage equalization and temperature response.",

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AU - Wong, Yuk Sum

AU - Wölfle, Werner Hugo

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AB - The valve-regulated lead-acid battery has been the work horse of standby applications for several decades. Float charging is normally implemented in these systems. However, float charging tends to overcharge the battery, causing water loss and grid corrosion which shorten the service life of the battery. This limitation may be avoided by using cell voltage equalization and temperature-compensated interrupted charge control (TCICC). Cell voltage equalization reduces the voltage distribution range over many cells, which, in turn, means that there are fewer cells with either overvoltage or undervoltage, both of which shorten the life of the battery. TCICC can increase the service life of the battery by avoiding overvoltage. Experimental evidence is presented to validate the new approach by comparing float charging and TCICC in terms of battery voltage equalization and temperature response.

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KW - Emergency power supplies

KW - Float charging

KW - Temperature compensation

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JO - IEEE Transactions on Industrial Electronics

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Self-equalization of cell voltages to prolong the life of VRLA batteries in standby applications

Abstract

Keywords

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