Secondary battery control device
CA 2249784 C · Owner: Toyota Jidosha Kabushiki Kaisha · Inventors: Asakawa, Fumihiko; Nakanishi, Toshiaki; Kimura, Tadao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The voltage of each of battery block (50-1 ~ 50-n) of a battery (50) is detected by a voltage sensor (70-1 ~ 70-n). Further the, temperature of the battery (50) is detected by a temperature sensor (74). These detected values are supplied to a detecting section (80) of a battery ECU (68). A judging section (82) reads out the threshold value of the voltage stored in a memory (84) on the basis, of the detected values of temperature and compares the threshold, value of the voltage with the detected voltage of each of the battery blocks (50-1 ~ 50-n). Then, if at least any one is less than the threshold value of the voltage, a relay (76) is turned off. Furthermore the threshold value of the …
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
- Filed October 8, 1998 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2020.
- 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.