Indication method for state of battery charge in stored motor vehicles - is based on encoded flashes of radio theft-warning LED driven by comparator of battery voltage with full-charge and partial-charge thresholds

摘要

A conventional radio receiver (R) is augmented with a control unit (S) and a processor (A) utilising existing hardware with function modifying software to compare continuously the battery voltage (UBatt) with two threshold values stored in memory. The higher threshold (1) is appropriate for a fully charged battery, and the lower threshold (2) for one retaining sufficient charge. According to the result of the comparison a pulse train with high, medium or low duty ratio is produced for distinctive flashing of the theft-warning diode (LD). USE/ADVANTAGE - In vehicles held at distribution depots or showrooms, an automatic and continuous indication of the state of charge is given without recourse to additional instruments or tools.Integrates method into conventional code-radio anti-theft warning diode.