Battery power source
First Claim
1. A low voltage DC power-supply for an electronic circuit load which comprises:
- at least one battery;
means for regulating the voltage delivered from said battery to said load; and
means for charging said battery from AC line power source comprising;
means for controlling the charging voltage applied to said battery in function of the net current flowing in and out of said battery;
switchable means for rectifying the AC line power;
means for detecting the full-cycle zero-axis crossing time of the AC line power; and
means for switching said means for rectifying at said zero-axis crossing time.
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Accused Products
Abstract
A regulated, low-voltage DC power source which draws energy from a standard AC outlet and uses a bank of lead-acid batteries for intermediate power storage.
The power source features a multi-level charge-voltage controller which is automatically adjusted in function of the net current flowing in or out of the batteries. The charge-voltage control is accomplished by switching the charging current rectifiers on or off only at the zero-axis crossing in order to minimize voltage spikes, and only at every other crossing in order to minimize DC components in the secondary of the transformer. Charge current, load current and net battery current are separately metered in order to provide maximum efficiency and safety in the operation of the power source. A low-voltage-drop series regulator is relied upon to provide a 5 volt regulated output to the load from a 6 volt unregulated battery voltage source.
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Citations
15 Claims
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1. A low voltage DC power-supply for an electronic circuit load which comprises:
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at least one battery; means for regulating the voltage delivered from said battery to said load; and means for charging said battery from AC line power source comprising; means for controlling the charging voltage applied to said battery in function of the net current flowing in and out of said battery; switchable means for rectifying the AC line power; means for detecting the full-cycle zero-axis crossing time of the AC line power; and
means for switching said means for rectifying at said zero-axis crossing time. - View Dependent Claims (15)
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2. The power supply claimed in claim 2 wherein said means for controlling comprises:
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means for metering the net current flowing in and out of said battery; and means, responsive to said means for metering, for setting said charging voltage. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification