EP0204038A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of operating a secondary battery
Assignee: Meidensha Corp
•
Filing: 1985-06-04
•
Granted: —
•
Expires: 2005-06-04
Abstract
Abstract A method for charging and discharging a secondary battery (10) using zinc as the negative electrode active material. After the termination of the normal discharge, direct current supply means (20, 26-22) is connected to the secondary battery in opposite polarity relation with each other and the secondary battery is reverse charged in a polarity opposite to the normal polarity. As a result of this reversed charge, the zinc remaining on the negative electrode afterthe termination of the normal discharge is completely dissolved into the electrolyte. If necessary, the energy stored in the secondary battery after the termination of the normal discharge is regenerated during the reversed charge. Following the reversed charge operation, a reversed discharge of the secondary battery (10) is effected to restore the polarity of the battery to normal, also possibly with power regeneration during the reverse discharge.
Inventors
- 👤 Takafumi Hashimoto
- 👤 Yoshihide Kamanaka
- 👤 Tadashi Ashikaga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 20:26
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; H02; H02J; H02J7/00; H02J7/90; H02J7/92; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A method of operating a secondary battery (10) adapted to be charged and discharged repeatedly, characterised by the improvement comprising performing a reversed charge operation of effecting a reversed charge of said battery by connecting positive (10P) and negative (10M) electrodes of said battery respectively to negative (10M) electrodes of said battery respectively to negative (20M) and positive (20P) output terminals of direct current supply means (20) such that said battery and said supply means are opposite in polarity to each other, said reversed charge operation being performed before a normal charge operation of said battery.
Claim 2
Independent Claim
96 words
A method of operating a secondary battery (10) adapted to be charged and discharged repeatedly, characterised by the improvement comprising performing a reversed charge operation of effecting a reversed charge of said battery by connecting positive (10P) and negative (10M) electrodes of said battery respectively to negative (10M) electrodes of said battery respectively to negative (20M) and positive (20P) output terminals of direct current supply means (20) such that said battery and said supply means are opposite in polarity to each other, said reversed charge operation being performed before a normal charge operation of said battery.
Claim 3
Independent Claim
106 words
A method of operating a secondary battery (10) including at least one unit cell using zinc as an active material for a negative electrode and adapted to be charged and discharged repeatedly, characterised by the improvement comprising performing a reversed charge operation of effecting a reversed charge of said battery by connecting positive (10P) and negative (10M) electrodes of said battery respectively to negative (20M) and positive (20P) output terminals of direct current supply means (20) such that said battery and said supply means are connected opposite in polarity to each other, said reversed charge operation being performed before a normal charge operation of said battery.
Claim 4
Independent Claim
106 words
A method of operating a secondary battery (10) including at least one unit cell using zinc as an active material for a negative electrode and adapted to be charged and discharged repeatedly, characterised by the improvement comprising performing a reversed charge operation of effecting a reversed charge of said battery by connecting positive (10P) and negative (10M) electrodes of said battery respectively to negative (20M) and positive (20P) output terminals of direct current supply means (20) such that said battery and said supply means are connected opposite in polarity to each other, said reversed charge operation being performed before a normal charge operation of said battery.
Claim 5
Dependent Claim
20 words
A method according to claim 1 or claim 2, wherein said reversed charge operation reverses the polarity of the battery.
Claim 6
Dependent Claim
36 words
A method according to claim 3 which includes a reversed discharge operation performed after said reversed charge operation to restore the polarity of said battery (10) subjected to said reversed charge to a normal polarity thereof.
Claim 7
Dependent Claim
28 words
A method according to claim 4, wherein said reversed discharge operation is performed until the voltage (e v ) of said battery (10) reaches a normal charged voltage.
Claim 8
Independent Claim
44 words
A method according to any one of claims 1 to 5, wherein said battery (10) has means for circulating its electrolytes, and wherein said reversed charge operation is performed in a condition in which the circulation of electrolytes in said battery (10) is stopped.
Claim 9
Independent Claim
52 words
A method according to any one of claims 1 to 6, wherein said direct current supply means (20) includes a.,c.-d.c. converting means ( 22 ) adapted to convert alternating-current power from an a.c. power source (26) to direct-current power and to convert direct-current power form said battery (10) to stepped-up alternating-current power.
Claim 10
Dependent Claim
42 words
A method according to claim 7, wherein said a.c.- d.c. converting means operates to return direct-current power from said battery to said a.c. power source and effect power regeneration during said reversed charge operation until the voltage of said battery reaches zero.
Claim 11
Dependent Claim
76 words
A method according to claim 7 or claim 8, which includes a reversed discharge operation performed after said reversed charge operation to restore the polarity of said battery subjected to said reversed charge to a normal polarity thereof, and wherein said a.c.-d.c. converting means operates to return direct current power from said battery to said a.c; power source and effect a power regeneration during said reversed discharge operation until the voltage of said battery reaches zero.
References Cited (Backward Citations)
GB1599076A
Cited
US4342954A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.