| 摘要 |
A charge maintenance system (10) for a lead-acid battery (11) includes a charger (14), a voltage monitor (16), and a load (17)/switch (18) series combination, all connectable in parallel across the battery terminals, the switch (18) and the charger (14) being under control of a microprocessor (15). The battery (11) is initially loaded for a predetermined time period, or until the battery voltage drops below an absolute minimum reference level during a loading cycle, and the system (10) stores the lowest battery terminal voltage occurring during the loading cycle. After a predetermined delay following the loading cycle the charger (14) is activated to charge the battery (11) until it reaches a maximum charge level. Then, if the stored lowest battery voltage level is below a predetermined reference level, the loading/charging routine is repeated, otherwise it is not and the battery is considered good. The system (10) indicates when the battery (11) failed the test and/or is bad.
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