CA2098468C - Method for battery charging - Google Patents
Method for battery chargingInfo
- Publication number
- CA2098468C CA2098468C CA002098468A CA2098468A CA2098468C CA 2098468 C CA2098468 C CA 2098468C CA 002098468 A CA002098468 A CA 002098468A CA 2098468 A CA2098468 A CA 2098468A CA 2098468 C CA2098468 C CA 2098468C
- Authority
- CA
- Canada
- Prior art keywords
- battery
- charging
- charge rate
- rate
- voltage signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/865—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/90—Regulation of charging or discharging current or voltage
- H02J7/92—Regulation of charging or discharging current or voltage with prioritisation of loads or sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/90—Regulation of charging or discharging current or voltage
- H02J7/96—Regulation of charging or discharging current or voltage in response to battery voltage
- H02J7/963—Regulation of charging or discharging current or voltage in response to battery voltage in response to battery voltage gradient
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/90—Regulation of charging or discharging current or voltage
- H02J7/971—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/975—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/977—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Hybrid Cells (AREA)
Abstract
The battery charging process of the present invention uses three charging rates. The initial charge rate of C
charges the battery (101) until the battery's temperature reaches a certain level (102). The charger then changes to a trickle charge rate of C/8 to finish charging the battery (103).
Next, the charger reduces the charging rate to C/40 to maintain the battery's charge (105). The process then monitors the battery's voltage. If the voltage signal has a slope that indicates the battery is being used by an attached device (106), the charging rate is increased to the trickle charge rate to simultaneously power the device and charge the battery.
charges the battery (101) until the battery's temperature reaches a certain level (102). The charger then changes to a trickle charge rate of C/8 to finish charging the battery (103).
Next, the charger reduces the charging rate to C/40 to maintain the battery's charge (105). The process then monitors the battery's voltage. If the voltage signal has a slope that indicates the battery is being used by an attached device (106), the charging rate is increased to the trickle charge rate to simultaneously power the device and charge the battery.
Description
2~
OD l~OR BA'~ ~A~rs~G
1~ 2r~.~r~ ~latea g~n~rally to th~ field of ~s UB~ ~f ~., t-_ ~J ~ r ~
r r~ 3 a ~ed ~or d~ioss are '~ eF~o--~ rad~ 7 asd ~- r~ ~., The~e new~ m~ikel metal 3L~,da (N~) ~ n;~ ry low, ~t a~ ~gh ~ ~1, rate u~1il the batte~ i8 ~oSt cL~Ejad ~
~h E 1~he cha~e rate ~ a low m~n~c0 ~ge. l~i8 i8 t~piwilly don~ by momto~ t~ batt~B t~ i e ~ud aD 5~ 1 he ehar~ rat~ as ~e batt~ry t~ e ln~eaE~eB. WheIl ~ne b~ a~l313 a ~rt~
hs ch~b.,. rlhK~ e 1O~elr9 ma~t.~,c~ ~rge.
11l order to ~ ~e time ~uat a co~uni~ation ~ ~ d~ice cannot b0 u~ed dtle to ~ h~ t ~5 ~e ~ *~n de~nce to be ~ ~ 2~ e ~B~ t4) power the de~ce ~v~le ~ ~ ~ed f~ ~ g.
Thi~ ~a~e~ a problem if ~he batte~ d ~he c1~7_. iE~ 21I~ the ...s-;I .t'-.~h.~l'e c~e mode. T~e O~ "R.. :r~l:nn d~nce ca~ a~ so ~us~ llhat th~
3D ~1;~. in the ~ance ms~de ~ ~u~plg all l~lhe device'6 need~ d the b~ ~t be us~d to ~upply ~h8 re~t.
mpl~ ~vo~ld be a i--ll;o~ A.h-~.. Q i~ de u~g ~O mA ~hile ~he d~g... s~ ;rT3 c~y ~i mA. The l;r~t~le"~h~ user ~6 ~e pho~ E;~ ~h~ll the 35 b~ actual~y b~mg rl..~ There il~ a re~ E need f~r .: ~
2 ~
a proee88 to dharge ~ battery, without ~ the batterJr, w~2ile the de~ *~rhed to 1 he batteIy is being uaed.
The ~ n(l of tlle IJ~e~ t inv~tion en~mr~ e~ a prooe~ for c~l~ a bn~ry. The batt~ harger haB a plur~ity Of ~ILeae~ ~ed cha~ r~tea. The ~oce~s ;k)1 D ~be batte~r voltag~ nal. If a 01ope of the batteIy ~0 voltage signal is greater thaII a ~.de~rminPd value, tlhe ~ g rate iB ~;lched firom a first ~e-~ete ~- ;-.e(l charge rate to a ~e~nd ~'Qt~rmined ~ rate. The seco~d ~de~ermi~ed ~rge rate ha~ a hi~her ra~e ~char~e t~an ~he firstpre.~ ,r..~ d ~harge rate.
The figure shows a flv.. ~ of tJhe battery cha.a;i,~g ~.ocea~ of the ~w~,nt in~entio~.
aD
T~e ~ OB~. of~he~ t~.~o~ aba~tery ~..e~ed deviice to be u~ed when c ~ to a ch&~ while 25 ~till cl~a,~ the k~ at a low, ~ ,e .~ e ra~
~O~a:86 i~ illu~ ed in ~e figure.
I~e ba~ of t~e ~ E_.~I, ~v~ iu~ hree ~ge rate~. The fast charge ra~ r~hoet~ ly ~ .. d to as C. In tlle ~ d ~.mho~ 500 ma~ bPI l ~ . :e~ a~e 30 u~ed, thu~ m~kinE C _ ~OO ~A. A~ernslte f~.~.h~t;l..çn~s will h~ve .L;~e~e,.~ valtles for C ~ P~ o~ ~e c~pa~ o~ ~he battery be~ cl~ d.
Ref~ to l~he figure, the b~t~ery cl~ the bat~ery t~...p~ iu.~ a6 the battery i~ g ~d at 1~he C
36 rate (101). VVheIl the ba~texy Jtl~ reache~ a I,.e~et~ poi~t (102), 47~ C iD ~e l~e~o~ qmhorlim~nt., , . . . ....... . . .
... .. . ..
:
, .
OD l~OR BA'~ ~A~rs~G
1~ 2r~.~r~ ~latea g~n~rally to th~ field of ~s UB~ ~f ~., t-_ ~J ~ r ~
r r~ 3 a ~ed ~or d~ioss are '~ eF~o--~ rad~ 7 asd ~- r~ ~., The~e new~ m~ikel metal 3L~,da (N~) ~ n;~ ry low, ~t a~ ~gh ~ ~1, rate u~1il the batte~ i8 ~oSt cL~Ejad ~
~h E 1~he cha~e rate ~ a low m~n~c0 ~ge. l~i8 i8 t~piwilly don~ by momto~ t~ batt~B t~ i e ~ud aD 5~ 1 he ehar~ rat~ as ~e batt~ry t~ e ln~eaE~eB. WheIl ~ne b~ a~l313 a ~rt~
hs ch~b.,. rlhK~ e 1O~elr9 ma~t.~,c~ ~rge.
11l order to ~ ~e time ~uat a co~uni~ation ~ ~ d~ice cannot b0 u~ed dtle to ~ h~ t ~5 ~e ~ *~n de~nce to be ~ ~ 2~ e ~B~ t4) power the de~ce ~v~le ~ ~ ~ed f~ ~ g.
Thi~ ~a~e~ a problem if ~he batte~ d ~he c1~7_. iE~ 21I~ the ...s-;I .t'-.~h.~l'e c~e mode. T~e O~ "R.. :r~l:nn d~nce ca~ a~ so ~us~ llhat th~
3D ~1;~. in the ~ance ms~de ~ ~u~plg all l~lhe device'6 need~ d the b~ ~t be us~d to ~upply ~h8 re~t.
mpl~ ~vo~ld be a i--ll;o~ A.h-~.. Q i~ de u~g ~O mA ~hile ~he d~g... s~ ;rT3 c~y ~i mA. The l;r~t~le"~h~ user ~6 ~e pho~ E;~ ~h~ll the 35 b~ actual~y b~mg rl..~ There il~ a re~ E need f~r .: ~
2 ~
a proee88 to dharge ~ battery, without ~ the batterJr, w~2ile the de~ *~rhed to 1 he batteIy is being uaed.
The ~ n(l of tlle IJ~e~ t inv~tion en~mr~ e~ a prooe~ for c~l~ a bn~ry. The batt~ harger haB a plur~ity Of ~ILeae~ ~ed cha~ r~tea. The ~oce~s ;k)1 D ~be batte~r voltag~ nal. If a 01ope of the batteIy ~0 voltage signal is greater thaII a ~.de~rminPd value, tlhe ~ g rate iB ~;lched firom a first ~e-~ete ~- ;-.e(l charge rate to a ~e~nd ~'Qt~rmined ~ rate. The seco~d ~de~ermi~ed ~rge rate ha~ a hi~her ra~e ~char~e t~an ~he firstpre.~ ,r..~ d ~harge rate.
The figure shows a flv.. ~ of tJhe battery cha.a;i,~g ~.ocea~ of the ~w~,nt in~entio~.
aD
T~e ~ OB~. of~he~ t~.~o~ aba~tery ~..e~ed deviice to be u~ed when c ~ to a ch&~ while 25 ~till cl~a,~ the k~ at a low, ~ ,e .~ e ra~
~O~a:86 i~ illu~ ed in ~e figure.
I~e ba~ of t~e ~ E_.~I, ~v~ iu~ hree ~ge rate~. The fast charge ra~ r~hoet~ ly ~ .. d to as C. In tlle ~ d ~.mho~ 500 ma~ bPI l ~ . :e~ a~e 30 u~ed, thu~ m~kinE C _ ~OO ~A. A~ernslte f~.~.h~t;l..çn~s will h~ve .L;~e~e,.~ valtles for C ~ P~ o~ ~e c~pa~ o~ ~he battery be~ cl~ d.
Ref~ to l~he figure, the b~t~ery cl~ the bat~ery t~...p~ iu.~ a6 the battery i~ g ~d at 1~he C
36 rate (101). VVheIl the ba~texy Jtl~ reache~ a I,.e~et~ poi~t (102), 47~ C iD ~e l~e~o~ qmhorlim~nt., , . . . ....... . . .
... .. . ..
:
, .
3- 2 ~
~e char~ ~l~ces~ change~ to a trickle c~rge mode (103) to finia~h cha.~g the battery. I~ ~e ~f~ d ~mho-lim~n~, 1~bi8 trie:kle ~ha~e rate i~ C/8. ~lle. ..~ P~nho~imP!~t-~ can have ~;lroiG.~ le charge rates A.7~..~ on how fast the b~tte~ can be triclcle cll~d ~.;ll.ou~ m~$in~ or re~n~n~
1he life of the battery. The ~ cle ~ge i~ h~ Qd ~or a ~I,.ec'~ mined time (104). In tbe ~.~f~.~ed emho~ nt, thi8 t;me is 4 bour~.
Ollce ~e battery is fulty cl~ 5e~, the c~t;il,g proce~s to a ~ t. "~n~e ~halrge mode (106) t~ keep the batte~ry cl~a,,~3~. Ni~I batt~ries ~ cally lo~e t heir ~harge over an e~ Ad time, e~ .;LIhoul, ~e. The ..~s~ nS~ e 3~harge mode l~BepB the bat~Iy chafged ~ur~g this pe2iod 80 ~hat a lbat~e~y user w~l retu~n ~o a fi~lly c}~,ed bPAttery no J5 matter how lo~g 1~h~y are a~1vay. This m~ten~ce chsxge r~te in l he pr~f8;rred RmhG~ f ~t iB C/40.
If tlhe batte~y i~ ~v~ ~ a d~ice while in the nr~ rge mode (106), it'B likely t~at ~he C/40 rate iB
t providi~g enough ~ e~ to power t~e device and al80 ~0 keep the batte~y cl~ed to ~ a~y Thi~, may result i~ the user returni~ to a .L6d~d batte~ ne p.~ of ~e y.e~ent invention ~o .;lo~ ~ the battery vol~g~ while ~e battery iB being..~ 0~ d. Ifthe~lopeoftke voltage BigIlal i8 ~lealal than a p..~' rmin~ ralue, 2~; in~jsr~;nE the ba~er~ i i being di~g~d, tli~ piOCe3B
~an~ th9 C~large rate back to the tri~lsle ch~rge, (103~. In ~he ~ d emho~im~nt, the ~re~ ~1 ..~do.. i~ a 0.1 V drop in one hour~ harge rate ia ~ d for ~e 4 hour~ (104)~ ~i~ loop i6 1~ he b~ d ~om tlle ~hai~r~
In the l~-cf~ d e~hGt~ e~-t, a r~ iot~ nn9 i~
c~ Pcled to ~he ba~tery while ~g. Tne rP~io~l~hc~ne ~ra~s 50 mA while o~e.c~ g in the ~l~dl,~ mode. In 1~he t~i~le ~harge mode, the tri~le charge of C:/8 minus th~ radio ~5 st~dby ~ yield~ a C/40 ~arge rate to ~he ba~;tery~ Thi~ Pn~ler the ol~ eep the bat~ ~d while the . . . ~ ~ . i - . ~ . .............. .
., , .
-4- 2(~U'8~3~
l~ldiQ iS in use and ~he user will retur~ ~o a fillly charged batt~r~.
"~ e~hGr~ entq ofthe ~-~ce~3 of ~be pre8ent il~.~Li~ can have ditre~t c~aarge rate~ lle~ ~ on the 6 ~ nt ~¢q.u~d by the batter~ .esed device. If the de~ice dl'aW8 more e~.6~t tha~ 50 mA, the t~i~ls ~harge is le ' to ~ e ~l~, thu8 k~,3~ tbe battery c~arged while lhe device iB o~J.,.~Ii~;.
~e char~ ~l~ces~ change~ to a trickle c~rge mode (103) to finia~h cha.~g the battery. I~ ~e ~f~ d ~mho-lim~n~, 1~bi8 trie:kle ~ha~e rate i~ C/8. ~lle. ..~ P~nho~imP!~t-~ can have ~;lroiG.~ le charge rates A.7~..~ on how fast the b~tte~ can be triclcle cll~d ~.;ll.ou~ m~$in~ or re~n~n~
1he life of the battery. The ~ cle ~ge i~ h~ Qd ~or a ~I,.ec'~ mined time (104). In tbe ~.~f~.~ed emho~ nt, thi8 t;me is 4 bour~.
Ollce ~e battery is fulty cl~ 5e~, the c~t;il,g proce~s to a ~ t. "~n~e ~halrge mode (106) t~ keep the batte~ry cl~a,,~3~. Ni~I batt~ries ~ cally lo~e t heir ~harge over an e~ Ad time, e~ .;LIhoul, ~e. The ..~s~ nS~ e 3~harge mode l~BepB the bat~Iy chafged ~ur~g this pe2iod 80 ~hat a lbat~e~y user w~l retu~n ~o a fi~lly c}~,ed bPAttery no J5 matter how lo~g 1~h~y are a~1vay. This m~ten~ce chsxge r~te in l he pr~f8;rred RmhG~ f ~t iB C/40.
If tlhe batte~y i~ ~v~ ~ a d~ice while in the nr~ rge mode (106), it'B likely t~at ~he C/40 rate iB
t providi~g enough ~ e~ to power t~e device and al80 ~0 keep the batte~y cl~ed to ~ a~y Thi~, may result i~ the user returni~ to a .L6d~d batte~ ne p.~ of ~e y.e~ent invention ~o .;lo~ ~ the battery vol~g~ while ~e battery iB being..~ 0~ d. Ifthe~lopeoftke voltage BigIlal i8 ~lealal than a p..~' rmin~ ralue, 2~; in~jsr~;nE the ba~er~ i i being di~g~d, tli~ piOCe3B
~an~ th9 C~large rate back to the tri~lsle ch~rge, (103~. In ~he ~ d emho~im~nt, the ~re~ ~1 ..~do.. i~ a 0.1 V drop in one hour~ harge rate ia ~ d for ~e 4 hour~ (104)~ ~i~ loop i6 1~ he b~ d ~om tlle ~hai~r~
In the l~-cf~ d e~hGt~ e~-t, a r~ iot~ nn9 i~
c~ Pcled to ~he ba~tery while ~g. Tne rP~io~l~hc~ne ~ra~s 50 mA while o~e.c~ g in the ~l~dl,~ mode. In 1~he t~i~le ~harge mode, the tri~le charge of C:/8 minus th~ radio ~5 st~dby ~ yield~ a C/40 ~arge rate to ~he ba~;tery~ Thi~ Pn~ler the ol~ eep the bat~ ~d while the . . . ~ ~ . i - . ~ . .............. .
., , .
-4- 2(~U'8~3~
l~ldiQ iS in use and ~he user will retur~ ~o a fillly charged batt~r~.
"~ e~hGr~ entq ofthe ~-~ce~3 of ~be pre8ent il~.~Li~ can have ditre~t c~aarge rate~ lle~ ~ on the 6 ~ nt ~¢q.u~d by the batter~ .esed device. If the de~ice dl'aW8 more e~.6~t tha~ 50 mA, the t~i~ls ~harge is le ' to ~ e ~l~, thu8 k~,3~ tbe battery c~arged while lhe device iB o~J.,.~Ii~;.
Claims (2)
1. A method for charging a battery in a battery charger having at least three charging rates, the method comprising the steps of:
charging the battery at a charge rate having a value of C until the battery temperature reaches a predetermined temperature;
if the predetermined temperature has been reached, charging the battery at a charge rate having a value of C/8 for a predetermined time;
after the predetermined time, charging the battery at a charge rate having a value of C/40;
monitoring a battery voltage signal of the battery;
determining a slope of the battery voltage signal; and if the drop in slope of the battery voltage signal is greater than a predetermined value, charging the battery at the charge rate having a value of C/8 for the predetermined time.
charging the battery at a charge rate having a value of C until the battery temperature reaches a predetermined temperature;
if the predetermined temperature has been reached, charging the battery at a charge rate having a value of C/8 for a predetermined time;
after the predetermined time, charging the battery at a charge rate having a value of C/40;
monitoring a battery voltage signal of the battery;
determining a slope of the battery voltage signal; and if the drop in slope of the battery voltage signal is greater than a predetermined value, charging the battery at the charge rate having a value of C/8 for the predetermined time.
2. A method for charging a battery in a battery charger having at least three charging rates, the method comprising the steps of:
charging the battery at a fast charge rate until the battery temperature reaches a predetermined temperature;
if the predetermined temperature has been reached, charging the battery at a trickle charge rate, less than the fast charge rate, for a predetermined time;
after the predetermined time, charging the battery at a maintenance charge rate, less than the trickle charge rate;
monitoring a battery voltage signal of the battery;
determining a slope of the battery voltage signal; and if the drop in slope of the battery voltage signal is greater than a predetermined value, charging the battery at the trickle charge rate for the predetermined time.
charging the battery at a fast charge rate until the battery temperature reaches a predetermined temperature;
if the predetermined temperature has been reached, charging the battery at a trickle charge rate, less than the fast charge rate, for a predetermined time;
after the predetermined time, charging the battery at a maintenance charge rate, less than the trickle charge rate;
monitoring a battery voltage signal of the battery;
determining a slope of the battery voltage signal; and if the drop in slope of the battery voltage signal is greater than a predetermined value, charging the battery at the trickle charge rate for the predetermined time.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US90988392A | 1992-07-07 | 1992-07-07 | |
| US07/909,883 | 1992-07-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2098468A1 CA2098468A1 (en) | 1994-01-08 |
| CA2098468C true CA2098468C (en) | 1998-09-01 |
Family
ID=25427979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002098468A Expired - Fee Related CA2098468C (en) | 1992-07-07 | 1993-06-15 | Method for battery charging |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5510693A (en) |
| KR (1) | KR0147033B1 (en) |
| CA (1) | CA2098468C (en) |
| MX (1) | MX9304082A (en) |
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|---|---|---|---|---|
| KR970018830A (en) * | 1995-09-30 | 1997-04-30 | 김광호 | Charging method of sealed nickel-zinc battery |
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| US6060865A (en) * | 1998-06-05 | 2000-05-09 | Yuasa-Delta Technology, Inc. | Rapid charging of a battery by applying alternating pulsed large current without a high temperature |
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| JP2003224933A (en) * | 2001-11-09 | 2003-08-08 | Milwaukee Electric Tool Corp | Battery charger |
| US7609027B2 (en) | 2001-11-09 | 2009-10-27 | Milwaukee Electric Tool Corporation | Electrical component, audio component, or electrical combination having a selectively connectable battery charger |
| US20050083639A1 (en) * | 2001-11-09 | 2005-04-21 | Zick Jonathan A. | Electrical component, such as a radio, MP3 player, audio component, battery charger, radio/charger, MP3 player/radio, MP3 player/charger or MP3 player/radio/charger, having a selectively connectable battery charger |
| US6812656B2 (en) * | 2002-02-27 | 2004-11-02 | Railpower Technologies Corp. | Sequenced pulse width modulation method and apparatus for controlling and powering a plurality of direct current motors |
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| US20050078834A1 (en) * | 2003-10-14 | 2005-04-14 | Credo Technology Corporation | Portable battery charging and audio unit |
| US8604752B2 (en) * | 2003-10-14 | 2013-12-10 | Robert Bosch Gmbh | Portable battery charging and audio unit |
| US7064507B2 (en) | 2004-02-17 | 2006-06-20 | Railpower Technologies Corp. | Managing wheel skid in a locomotive |
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-
1993
- 1993-06-15 CA CA002098468A patent/CA2098468C/en not_active Expired - Fee Related
- 1993-07-07 MX MX9304082A patent/MX9304082A/en not_active IP Right Cessation
- 1993-07-07 KR KR1019930012687A patent/KR0147033B1/en not_active Expired - Fee Related
-
1994
- 1994-08-18 US US08/292,553 patent/US5510693A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| MX9304082A (en) | 1994-03-31 |
| KR940003138A (en) | 1994-02-19 |
| CA2098468A1 (en) | 1994-01-08 |
| US5510693A (en) | 1996-04-23 |
| KR0147033B1 (en) | 1998-10-01 |
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