Microprocessor controlled booster apparatus with polarity protection
First Claim
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1. A polarity detection circuit, comprising:
- cables for connecting a first battery to a depleted battery;
a polarity sensing circuit coupled to the first battery for providing an enable signal when a correct polarity connection is made between the first battery and the depleted battery;
a semiconductor device coupled to the polarity sensing circuit, the semiconductor device passing charging current flow between the first battery and the depleted battery when it receives the enable signal;
a frequency generator coupled to one of the cables and injecting a signal of a predetermined frequency into that cable; and
a frequency detector coupled to the other one of the cables, the frequency detector preventing the semiconductor device from permitting current flow between the first battery and the depleted battery when the frequency detector ceases to detect the signal of predetermined frequency injected by the frequency generator.
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Abstract
A polarity protection circuit for a battery booster device is provided. According to an exemplary embodiment, the polarity protection circuit is comprised of solid-state devices. Preferably no mechanical or electro-mechanical devices, such as solenoids are included in the polarity protection circuit. The polarity protection circuit is electrically connected to the battery to be charged and to the boosting battery. The polarity protection circuit prevents current flow between the batteries unless proper polarity is achieved.
111 Citations
21 Claims
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1. A polarity detection circuit, comprising:
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cables for connecting a first battery to a depleted battery; a polarity sensing circuit coupled to the first battery for providing an enable signal when a correct polarity connection is made between the first battery and the depleted battery; a semiconductor device coupled to the polarity sensing circuit, the semiconductor device passing charging current flow between the first battery and the depleted battery when it receives the enable signal; a frequency generator coupled to one of the cables and injecting a signal of a predetermined frequency into that cable; and a frequency detector coupled to the other one of the cables, the frequency detector preventing the semiconductor device from permitting current flow between the first battery and the depleted battery when the frequency detector ceases to detect the signal of predetermined frequency injected by the frequency generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16, 17, 18, 19)
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9. A portable booster apparatus, comprising:
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means for providing power; means for connecting the means for providing power to a depleted battery; means for detecting polarity of the connection between the means for providing power and the depleted battery and for generating an enable signal when a correct polarity is detected; and at least one FET having a control electrode and being coupled to the means for detecting polarity, the control electrode receiving the enable signal and placing the FET into a conducting state in which charging current flow passes through the FET between the means for providing power and the depleted battery; and means for injecting a signal of a predetermined frequency into the means for connecting; and means for detecting frequency coupled to the means for connecting on an opposite side of the depleted battery than the means for injecting, the means for detecting placing the FETs into a non-conducting state when the means for detecting ceases to detect the frequency from the means for injecting. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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20. A portable booster apparatus, comprising:
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means for providing power; means for connecting the means for providing power to a depleted battery; means for detecting polarity of the connection between the means for providing power and the depleted battery and for generating an enable signal when a correct polarity is detected; at least one FET having a control electrode and being coupled to the means for detecting polarity, the control electrode receiving the enable signal and placing the FET into a conducting state in which charging current flow passes through the FET between the means for providing power and the depleted battery; means for injecting a signal of a predetermined frequency into the means for connecting; and
means for detecting frequency coupled to the means for connecting on an opposite side of the depleted battery than the means for injecting, the means for detecting placing the FETs into a non-conducting state when the means for detecting ceases to detect the frequency from the means for injecting; andmeans for interrupting current flow after a correct polarity connection has been established; wherein the means for interrupting comprises a momentary switch adapted to short circuit the control electrode of the FET when depressed.
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21. A portable booster apparatus, comprising:
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means for providing power; means for connecting the means for providing power to a depleted battery; means for detecting polarity of the connection between the means for providing power and the depleted battery and for generating an enable signal when a correct polarity is detected; and at least one FET having a control electrode and being coupled to the means for detecting polarity, the control electrode receiving the enable signal and placing the FET into a conducting state in which charging current flow passes through the FET between the means for providing power and the depleted battery; means for injecting a signal of a predetermined frequency into the means for connecting; and
means for detecting frequency coupled to the means for connecting on an opposite side of the depleted battery than the means for injecting, the means for detecting placing the FETs into a non-conducting state when the means for detecting ceases to detect the frequency from the means for injecting;comprising means for interrupting current flow after a correct polarity connection has been established; wherein the means for interrupting comprises a microprocessor programmed to place the FET in a non-conducting state if no depleted battery is present and further comprising at least one sensor connected to an input of the microprocessor for producing a measured signal representing the presence of the depleted battery at the means for connecting; wherein the microprocessor is programmed to place the at least one FET in a non-conducting state, then check the measured signal about once every second, and place the at least one FET in a conducting state if a depleted battery is present.
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Specification