Battery charger
First Claim
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1. An apparatus for charging batteries comprising, in combination:
- a main power section including a transformer-input EMI filter section, a rectifier filter section, and a power switching section, and having a battery output line and a battery return line;
a control section including a low voltage regulator providing low voltage power to the control section from said main power section, a pulse width modulator and output driver section providing driver signals to said power switching section, a constant current control circuit for maintaining a constant current output of said apparatus operably connected to said pulse width modulator, a constant voltage control section operably connected to sense a portion of the output voltage and to supply a control signal to said pulse width modulator, and a battery over-temperature control operably connected to sense battery temperature and to provide a control signal to said pulse width modulator; and
a timer section operably connected to provide temporal control over said apparatus, subject to the charging current used, the output voltage, and the battery temperature as monitored by said control section, and providing to said control section an end of charge indication.
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Abstract
A battery charger analyzer utilizing a down pulse configuration employs a mber of power switching transistors driven from a pulse-width modulator in a control section which monitors and analyzes the battery temperature, charge condition, current provided, and length of time in the charge cycle, all of which affect the operation of the pulsewidth modulator and thereby the charge supplied to the battery. The charger analyzer supplies 95% of the battery charge at either of two selected charging rates.
48 Citations
20 Claims
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1. An apparatus for charging batteries comprising, in combination:
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a main power section including a transformer-input EMI filter section, a rectifier filter section, and a power switching section, and having a battery output line and a battery return line; a control section including a low voltage regulator providing low voltage power to the control section from said main power section, a pulse width modulator and output driver section providing driver signals to said power switching section, a constant current control circuit for maintaining a constant current output of said apparatus operably connected to said pulse width modulator, a constant voltage control section operably connected to sense a portion of the output voltage and to supply a control signal to said pulse width modulator, and a battery over-temperature control operably connected to sense battery temperature and to provide a control signal to said pulse width modulator; and a timer section operably connected to provide temporal control over said apparatus, subject to the charging current used, the output voltage, and the battery temperature as monitored by said control section, and providing to said control section an end of charge indication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification