Life diagnosis apparatus for automotive battery
US4888716A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1987 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Apr 13, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2310/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A novel automotive battery life diagnosis apparatus is disclosed, in which the terminal voltage, charge-discharge current and the temperature of a battery are detected, output signals from the detectors are applied to and processed in a predetermined manner by a control unit, and a life alarm is displayed on a display unit. Further, the control unit has the functions to calculate a value representing the life of the battery from the detection signals of the detectors before and after cranking of an internal combustion engine and to store an initial value of a parameter representing the battery life in the initial stage of battery operation. The initial value of the parameter is compared with the present value thereof to forecast and indicate the life of the battery on the display unit from a predetermined relationship formed by life curves between the initial value and the present value of the parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.