Electronic battery testing device loose terminal connection detection via a comparison circuit
First Claim
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1. A device for accessing condition of a battery, comprising:
- a first connector for coupling to a first terminal of the battery;
a second connector for coupling to the first terminal of the battery;
a third connector for coupling to a second terminal of the battery;
a fourth connector for coupling to the second terminal of the battery;
electrical circuitry coupled to the first, second, third and fourth connectors for measuring a parameter of the battery and providing a measurement output;
a bridge circuit having first and second inputs connected to the first and second connectors and third and fourth inputs connected to the third and fourth connectors; and
output circuitry connected to a first and a second output of the bridge circuit providing an output in response to a voltage difference detected between the first output and the second output.
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Abstract
An electronic battery testing device includes first and second electrical probes for coupling to first and second battery terminals, respectively, and electrical circuitry coupled to the electrical probes for providing an output related to battery condition. The probes each have a pair of electrical connections. A bridge circuit connected between the first and second electrical probes provides a bridge output. An amplifier connected to the bridge output provides an amplified output. The amplified output is indicative of a loose connection between an electrical probe and a battery terminal. The amplified output may be used to indicate an alarm condition.
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Citations
11 Claims
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1. A device for accessing condition of a battery, comprising:
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a first connector for coupling to a first terminal of the battery; a second connector for coupling to the first terminal of the battery; a third connector for coupling to a second terminal of the battery; a fourth connector for coupling to the second terminal of the battery; electrical circuitry coupled to the first, second, third and fourth connectors for measuring a parameter of the battery and providing a measurement output; a bridge circuit having first and second inputs connected to the first and second connectors and third and fourth inputs connected to the third and fourth connectors; and output circuitry connected to a first and a second output of the bridge circuit providing an output in response to a voltage difference detected between the first output and the second output. - View Dependent Claims (2, 3, 4, 5)
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6. A device for detecting a loose connection in a battery tester having first and second connectors for connecting to a first terminal of a battery and third and fourth connectors for connecting to a second terminal of the battery, the device comprising:
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a first circuit connected between the first and third connectors and having an output related to a connection between a connector and a battery terminal; a second circuit connected between the second and fourth connectors having an output related to a connection between a connector and a battery terminal; and comparison circuitry coupled to the outputs of the first and second circuits which compares the outputs and provides a warning output in response to a detected difference between the outputs. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification