Lithium secondary battery having thermal switch
CA 2230575 A1 · Owner: Nishikata, Genjiro · Inventors: Kami, Kenichiro; Nishikata, Genjiro; Tateno, Tatsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a lithium secondary battery comprising an electrode assembly which consists of a cathode an anode and a, separator laminated therebetween and a battery case in which, the electrode assembly is placed said lithium secondary, battery characterized by having a thermal switch which has a mechanism for electrically connecting the cathode and the anode at a portion other than an active material-contained layer in accordance with an increase in the battery temperature. The lithium secondary battery can prevent itself from being left in a charged condition after having an unusual trouble, and can operate the safety device even when its internal pressure decreases.
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 February 25, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 25, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 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.