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Title: Bypass apparatus and method for series connected energy storage devices

Abstract

A bypass apparatus and method for series connected energy storage devices. Each of the energy storage devices coupled to a common series connection has an associated bypass unit connected thereto in parallel. A current bypass unit includes a sensor which is coupled in parallel with an associated energy storage device or cell and senses an energy parameter indicative of an energy state of the cell, such as cell voltage. A bypass switch is coupled in parallel with the energy storage cell and operable between a non-activated state and an activated state. The bypass switch, when in the non-activated state, is substantially non-conductive with respect to current passing through the energy storage cell and, when in the activated state, provides a bypass current path for passing current to the series connection so as to bypass the associated cell. A controller controls activation of the bypass switch in response to the voltage of the cell deviating from a pre-established voltage setpoint. The controller may be included within the bypass unit or be disposed on a control platform external to the bypass unit. The bypass switch may, when activated, establish a permanent or a temporary bypass current path.

Inventors:
 [1];  [2];  [3]
  1. (Saint-Luc, CA)
  2. (Montreal, CA)
  3. (St-Hyacinthe, CA)
Publication Date:
Research Org.:
United States Advanced Battery Consortium, Dearborn, MI (US)
OSTI Identifier:
872940
Patent Number(s):
US 6046514
Assignee:
3M Innovative Properties Company (St. Paul, MN); Hydro-Quebec Corporation (Montreal, CA) CHO
DOE Contract Number:  
FC02-91CE50336
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
bypass; apparatus; method; series; connected; energy; storage; devices; coupled; common; connection; associated; unit; thereto; parallel; current; sensor; device; cell; senses; parameter; indicative; voltage; switch; operable; non-activated; activated; substantially; non-conductive; respect; passing; provides; path; controller; controls; activation; response; deviating; pre-established; setpoint; included; disposed; control; platform; external; establish; permanent; temporary; connected thereto; cell voltage; series connected; storage device; energy storage; storage devices; storage cell; series connection; unit connected; connected energy; current passing; current path; controller controls; bypass apparatus; current pass; /307/200/320/361/

Citation Formats

Rouillard, Jean, Comte, Christophe, and Daigle, Dominik. Bypass apparatus and method for series connected energy storage devices. United States: N. p., 2000. Web.
Rouillard, Jean, Comte, Christophe, & Daigle, Dominik. Bypass apparatus and method for series connected energy storage devices. United States.
Rouillard, Jean, Comte, Christophe, and Daigle, Dominik. Sat . "Bypass apparatus and method for series connected energy storage devices". United States. https://www.osti.gov/servlets/purl/872940.
@article{osti_872940,
title = {Bypass apparatus and method for series connected energy storage devices},
author = {Rouillard, Jean and Comte, Christophe and Daigle, Dominik},
abstractNote = {A bypass apparatus and method for series connected energy storage devices. Each of the energy storage devices coupled to a common series connection has an associated bypass unit connected thereto in parallel. A current bypass unit includes a sensor which is coupled in parallel with an associated energy storage device or cell and senses an energy parameter indicative of an energy state of the cell, such as cell voltage. A bypass switch is coupled in parallel with the energy storage cell and operable between a non-activated state and an activated state. The bypass switch, when in the non-activated state, is substantially non-conductive with respect to current passing through the energy storage cell and, when in the activated state, provides a bypass current path for passing current to the series connection so as to bypass the associated cell. A controller controls activation of the bypass switch in response to the voltage of the cell deviating from a pre-established voltage setpoint. The controller may be included within the bypass unit or be disposed on a control platform external to the bypass unit. The bypass switch may, when activated, establish a permanent or a temporary bypass current path.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

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