Method and apparatus for indicating electric charge remaining in batteries based on electrode weight and center of gravity
Abstract
In most electrochemical batteries which generate electricity through the reaction of a battery electrode with an electrolyte solution, the chemical composition, and thus the weight and density, of the electrode changes as the battery discharges. The invention measures a parameter of the battery which changes as the weight of the electrode changes as the battery discharges and relates that parameter to the value of the parameter when the battery is fully charged and when the battery is functionally discharged to determine the state-of-charge of the battery at the time the parameter is measured. In one embodiment, the weight of a battery electrode or electrode unit is measured to determine the state-of-charge. In other embodiments, where a battery electrode is located away from the geometrical center of the battery, the position of the center of gravity of the battery or shift in the position of the center of gravity of the battery is measured (the position of the center of gravity changes with the change in weight of the electrode) and indicates the state-of-charge of the battery.
- Inventors:
-
- Idaho Falls, ID
- Issue Date:
- Research Org.:
- EG & G IDAHO INC
- OSTI Identifier:
- 870717
- Patent Number(s):
- 5580675
- Assignee:
- Lockheed Idaho Technologies Company (Idaho Falls, ID)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- DOE Contract Number:
- AC07-76ID01570
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; apparatus; indicating; electric; charge; remaining; batteries; based; electrode; weight; center; gravity; electrochemical; generate; electricity; reaction; battery; electrolyte; solution; chemical; composition; density; changes; discharges; measures; parameter; relates; value; charged; functionally; discharged; determine; state-of-charge; time; measured; embodiment; unit; embodiments; located; geometrical; position; shift; change; indicates; battery electrode; electric charge; chemical composition; electrolyte solution; generate electricity; electrochemical batteries; generate electric; electrode weight; /429/
Citation Formats
Rouhani, S Zia. Method and apparatus for indicating electric charge remaining in batteries based on electrode weight and center of gravity. United States: N. p., 1996.
Web.
Rouhani, S Zia. Method and apparatus for indicating electric charge remaining in batteries based on electrode weight and center of gravity. United States.
Rouhani, S Zia. Mon .
"Method and apparatus for indicating electric charge remaining in batteries based on electrode weight and center of gravity". United States. https://www.osti.gov/servlets/purl/870717.
@article{osti_870717,
title = {Method and apparatus for indicating electric charge remaining in batteries based on electrode weight and center of gravity},
author = {Rouhani, S Zia},
abstractNote = {In most electrochemical batteries which generate electricity through the reaction of a battery electrode with an electrolyte solution, the chemical composition, and thus the weight and density, of the electrode changes as the battery discharges. The invention measures a parameter of the battery which changes as the weight of the electrode changes as the battery discharges and relates that parameter to the value of the parameter when the battery is fully charged and when the battery is functionally discharged to determine the state-of-charge of the battery at the time the parameter is measured. In one embodiment, the weight of a battery electrode or electrode unit is measured to determine the state-of-charge. In other embodiments, where a battery electrode is located away from the geometrical center of the battery, the position of the center of gravity of the battery or shift in the position of the center of gravity of the battery is measured (the position of the center of gravity changes with the change in weight of the electrode) and indicates the state-of-charge of the battery.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1996},
month = {Mon Jan 01 00:00:00 EST 1996}
}