Charging control apparatus, method of controlling the charging process, and power output apparatus
CA 2265338 C · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Kuno, Hiromichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is a fear of excessively charging a secondary battery which is subjected to repeated charge and discharge in a specific charged state that is lower than a full charge level. The technique of the present invention measures a temperature gradient of the secondary battery due to a charging process determines that the charged state of the secondary battery is close to the full charge level at the time point when the temperature gradient abruptly increases and stops the charging process based on the determination. In the case where the secondary battery is repeatedly charged and discharged the structure of the present invention corrects the observed temperature gradient. The concrete …
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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
- Filed March 16, 1999 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2021.
- 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.