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Title: Charging system and method for multicell storage batteries

Abstract

A battery-charging system includes a first charging circuit connected in series with a plurality of battery cells for controlled current charging. A second charging circuit applies a controlled voltage across each individual cell for equalization of the cells to the fully charged condition. This controlled voltage is determined at a level above the fully charged open-circuit voltage but at a sufficiently low level to prevent corrosion of cell components by electrochemical reaction. In this second circuit for cell equalization, a transformer primary receives closely regulated, square-wave voltage which is coupled to a plurality of equal secondary coil windings. Each secondary winding is connected in parallel to each cell of a series-connected pair of cells through half-wave rectifiers and a shared, intermediate conductor.

Inventors:
 [1]
  1. Rolling Hills Estates, CA
Issue Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
863032
Patent Number(s):
4079303
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
charging; method; multicell; storage; batteries; battery-charging; circuit; connected; series; plurality; battery; cells; controlled; current; applies; voltage; individual; cell; equalization; charged; condition; determined; level; open-circuit; sufficiently; prevent; corrosion; components; electrochemical; reaction; transformer; primary; receives; closely; regulated; square-wave; coupled; equal; secondary; coil; windings; winding; parallel; series-connected; pair; half-wave; rectifiers; shared; intermediate; conductor; secondary winding; cell component; charging circuit; storage batteries; cell components; circuit connected; circuit voltage; battery cells; chemical reaction; electrochemical reaction; battery cell; individual cell; wave rectifier; prevent corrosion; controlled voltage; secondary coil; controlled current; cell equal; charged condition; /320/

Citation Formats

Cox, Jay A. Charging system and method for multicell storage batteries. United States: N. p., 1978. Web.
Cox, Jay A. Charging system and method for multicell storage batteries. United States.
Cox, Jay A. Sun . "Charging system and method for multicell storage batteries". United States. https://www.osti.gov/servlets/purl/863032.
@article{osti_863032,
title = {Charging system and method for multicell storage batteries},
author = {Cox, Jay A},
abstractNote = {A battery-charging system includes a first charging circuit connected in series with a plurality of battery cells for controlled current charging. A second charging circuit applies a controlled voltage across each individual cell for equalization of the cells to the fully charged condition. This controlled voltage is determined at a level above the fully charged open-circuit voltage but at a sufficiently low level to prevent corrosion of cell components by electrochemical reaction. In this second circuit for cell equalization, a transformer primary receives closely regulated, square-wave voltage which is coupled to a plurality of equal secondary coil windings. Each secondary winding is connected in parallel to each cell of a series-connected pair of cells through half-wave rectifiers and a shared, intermediate conductor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

Patent:

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