Thermal switch for battery protection
Patent 5070427 Issued on December 3, 1991. Estimated Expiration Date: 
January 31, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 31, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2006810 Thaw alarm for food freezer Radial lead thermal cut-off device Temperature sensitive fire alarm unit Patent #: 4771270 InventorAssigneeApplicationNo. 473040 filed on 01/31/1990US Classes:361/104, With fuse307/144, Fluid-pressure actuator337/407, Utilizing spring or other energy361/103Circuit interruption by thermal sensingExaminersPrimary: Pellinen, A. D.Assistant: Schultz, C. Attorney, Agent or FirmInternational ClassH02H 005/04AbstractLithium batteries are protected from a runaway condition marked by over-current and high temperature by a temperature sensor having a thermally conductive housing in thermal contact with all the cells of the battery and containing a fusible column which melts when a limit temperature is reached to open a switch in series with the battery. The switch may be the same switch which activates the circuit. | |
