SYSTEMS AND METHODS FOR AN OPEN WIRE SCAN
First Claim
1. An apparatus, comprising:
- a circuit including a plurality of inputs for connecting with a plurality of outputs of a multi-cell battery pack; and
an open connection detection circuit, formed within the circuit, for detecting an open connection on at least one of the plurality of inputs connected to the multi-cell battery pack and generating a fault condition responsive thereto, the open connection detection circuit comprising;
at least one current source device coupled between the plurality of inputs connected to the multi-cell battery and a reference voltage;
at least one device for turning on and off the at least one current source device, wherein the at least one device causes a current to flow through an input in the plurality of inputs to which the at least one device is connected;
at least one amplifier for amplifying voltages at adjacent inputs of the plurality of inputs and generating a voltage responsive thereto;
an analog to digital converter for measuring the voltage produced by the at least one amplifier, wherein the analog to digital converter measures voltages produced by the at least one amplifier at the beginning and end of a time period; and
a control logic circuit for generating a fault detection indication responsive to the voltage indicating an open connection on at least one of the plurality of inputs based on the measured voltages by the analog to digital converter.
1 Assignment
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Accused Products
Abstract
Systems and methods for an open wire scan are provided. In certain embodiments, An apparatus comprising a circuit includes a plurality of inputs for connecting with a plurality of outputs of a multi-cell battery pack; and an open connection detection circuit, formed within the circuit, for detecting an open connection on at least one of the plurality of inputs connected to the multi-cell battery pack and generating a fault condition responsive thereto. The open connection detection circuit comprises at least one current source device; and at least one device for turning on and off the at least one current source device. The open connection detection circuit also comprises at least one amplifier; an analog to digital converter; and a control logic circuit.
11 Citations
23 Claims
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1. An apparatus, comprising:
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a circuit including a plurality of inputs for connecting with a plurality of outputs of a multi-cell battery pack; and an open connection detection circuit, formed within the circuit, for detecting an open connection on at least one of the plurality of inputs connected to the multi-cell battery pack and generating a fault condition responsive thereto, the open connection detection circuit comprising; at least one current source device coupled between the plurality of inputs connected to the multi-cell battery and a reference voltage; at least one device for turning on and off the at least one current source device, wherein the at least one device causes a current to flow through an input in the plurality of inputs to which the at least one device is connected; at least one amplifier for amplifying voltages at adjacent inputs of the plurality of inputs and generating a voltage responsive thereto; an analog to digital converter for measuring the voltage produced by the at least one amplifier, wherein the analog to digital converter measures voltages produced by the at least one amplifier at the beginning and end of a time period; and a control logic circuit for generating a fault detection indication responsive to the voltage indicating an open connection on at least one of the plurality of inputs based on the measured voltages by the analog to digital converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An open connection detection circuit for detecting an open connection on at least one of a plurality of inputs from a multi-cell battery pack, the open connection detection circuit comprising:
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at least one current source connected between one of the plurality of inputs and a reference voltage, wherein the plurality of inputs are configured to couple to the multi-cell battery pack; at least one device for turning on and off the at least one current source; at least one comparing device for comparing voltages at adjacent inputs of the plurality of inputs and generating a control signal responsive thereto; at least one amplifier for amplifying voltages at adjacent inputs of the plurality of inputs and generating a voltage responsive thereto; an analog to digital converter for measuring voltages produced by the at least one amplifier, wherein the analog to digital converter measures the voltages produced by the at least one amplifier at the beginning and end of a time period; a control logic circuit for generating a fault detection indication responsive to the voltages indicating an open connection on at least one of the plurality of inputs based on the measured voltages by the analog to digital converter; and a second control logic circuit coupled to the at least one comparing device, the second control logic circuit generating a fault detection indication responsive to the control signal indicating an open connection on at least one of the plurality of inputs. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for detecting an open connection between a circuit device and a multi-cell battery, comprising the steps of:
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measuring a voltage at each input connection on the circuit device from the multi-cell battery pack at the beginning and end of a time period; calculating a difference between beginning measurements made at the beginning of the time period and end measurements made the end of the time period; and detecting the open connection of at least one of the plurality of inputs by observing the positive and negative peak patterns produced by the difference calculations. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A system comprising:
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a multi-cell battery pack having a plurality of inputs; and a circuit device comprising; at least one current source connected between one of the plurality of inputs and a reference voltage, wherein the plurality of inputs are configured to couple to the multi-cell battery pack; at least one device for turning on and off the at least one current source; and an open circuit detector comprising; at least one amplifier for amplifying voltages at adjacent inputs of the plurality of inputs and generating a voltage responsive thereto; an analog to digital converter for measuring voltages produced by the at least one amplifier, wherein the analog to digital converter measures the voltages produced by the at least one amplifier at the beginning and end of a time period; and a control logic circuit for generating a fault detection indication responsive to the voltages indicating an open connection on at least one of the plurality of inputs based on the measured voltages by the analog to digital converter. - View Dependent Claims (22, 23)
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Specification