Control of power supply
First Claim
1. A control system for a power supply comprising a controlled battery change over switch, a battery connected to said controlled battery change over switch which connects said battery to battery charging means, when a mains supply is operative in association with said change over switch, or to a load to be supplied with battery power when said mains supply fails after having been operatively connected, and wherein when the battery voltage, during discharge through the load, has fallen to a predetermined value, a battery voltage detector generates a signal operative to effect switching of said change over switch to disconnect said battery from said load and connect said battery to the charging means.
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Accused Products
Abstract
A power supply control system suitable for controlling and protecting batteries used in such systems by causing the automatic disconnection of the battery from a load when either the battery voltage has dropped to a preset level or when the load has open circuited. Disconnection of the load ensures that the battery does not undergo any further discharge (except self discharge) and the load can only be reconnected to the battery when a main supply (charging means) is reapplied and removed again or by use of additional circuitry from an external switch, and then only when load is present and battery voltage is above the preset level.
41 Citations
4 Claims
- 1. A control system for a power supply comprising a controlled battery change over switch, a battery connected to said controlled battery change over switch which connects said battery to battery charging means, when a mains supply is operative in association with said change over switch, or to a load to be supplied with battery power when said mains supply fails after having been operatively connected, and wherein when the battery voltage, during discharge through the load, has fallen to a predetermined value, a battery voltage detector generates a signal operative to effect switching of said change over switch to disconnect said battery from said load and connect said battery to the charging means.
Specification