Battery condition monitoring method and apparatus
Patent 4052717 Issued on October 4, 1977. Estimated Expiration Date: 
October 4, 1994. 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.
October 4, 1994. 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 References3621359 InventorsAssigneeApplicationNo. 05/622200 filed on 10/14/1975US Classes:324/432, To determine battery electrolyte condition320/161, With detection of current or voltage differential (e.g., slope, etc.)324/430, To determine internal battery impedance340/636.11, By change or rate of change of impedance or admittance340/636.15, By voltage340/661ComparisonExaminersPrimary: Caldwell, Sr., John W.Assistant: Myer, Daniel Attorney, Agent or FirmInternational ClassG01R 31/36 (20060101)AbstractA battery condition monitoring device which senses battery terminal voltage and creates a function thereof and tests that function against predetermined criteria and determines battery condition as a result of such tests. Furthermore, the invention operates on the transient of the battery terminal voltage existant immediately upon the loading of the battery. The test is performed on the slope of the terminal voltage transient and a function of that transient during a test period is created, analyzed and evaluated against reference levels. | |
