Thermally responsive battery charger
CA 1319736 C · Owner: Woods, Samuel G. · Inventors: Bhagwat, Pradeep M.; Daniel, Daniel Steven; Woods, Samuel G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A battery charger(10)includes a capacitor(20)which establishes a level of current sufficient to fast charge in one-hour a battery(18)having from one to twenty cells. An SCR(16)is controlled by a timer(42)to initially delay the supply of current while determining whether the battery(18)is hot or cool. If battery(18) is cool, charger(10)proceeds to fast charge the battery. After battery(18)is fully charged the, battery heats to a temperature where a NTC thermistor (58)responds to trigger a second timer(52)which controls SCR(16)to stop the fast charging operation. Charger(10) is then controlled to prevent the charger from thereafter re-entering a fast charge mode. If battery(18)is initially …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.