PORTABLE HEAVY LOAD BATTERY TESTING SYSTEM AND METHOD
First Claim
1. A portable measurement device for determining a parameter of a battery comprising:
- a first contactor to connect to a first terminal of the battery, the first contactor comprising a first pair of leads;
a second contactor to connect to a second terminal of the battery, the second contactor comprising a second pair of leads;
a housing configured to house a measurement circuit, the measurement circuit comprising;
a switch to selectively connect a resistive load to the battery via one of the first pair of leads and one of the second pair of leads;
an analog to digital (AD) converter connected to the battery via another one of the first pair of leads and another one of the second pair of leads, and wherein the AD converter is configured to;
receive a first voltage from the battery before the resistive load is connected to the battery and convert the first voltage to a first digital signal;
receive a second voltage from the battery after the resistive load is connected to the battery and convert the second voltage to a second digital signal; and
receive a third voltage from the battery after the resistive load is disconnected from the battery and convert the third voltage to a third digital signal;
a microcontroller configured to;
calculate voltage drop data as a function of the first, second, and third digital signals;
retrieve voltage profile data corresponding to a desired parameter from a memory; and
compare the voltage drop data to the voltage profile data to determine a value of the desired parameter; and
a display to generate the value of the desired parameter for display.
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Accused Products
Abstract
A portable measurement device and method for measuring a parameter value of a battery. The measurement device connects a large resistive load to a battery being tested. The load is connected to the battery through a first set of kelvin connected clamps and a switch. A microprocessor measures open and closed circuit voltages via a second set of kelvin connected jaws. The microprocessor determines voltage drop curve data based on the measure open and closed circuit voltages. The microprocessor compares the voltage drop curve data to voltage drop profile data for a particular parameter to determine the parameter value for the battery.
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Citations
27 Claims
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1. A portable measurement device for determining a parameter of a battery comprising:
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a first contactor to connect to a first terminal of the battery, the first contactor comprising a first pair of leads; a second contactor to connect to a second terminal of the battery, the second contactor comprising a second pair of leads; a housing configured to house a measurement circuit, the measurement circuit comprising; a switch to selectively connect a resistive load to the battery via one of the first pair of leads and one of the second pair of leads; an analog to digital (AD) converter connected to the battery via another one of the first pair of leads and another one of the second pair of leads, and wherein the AD converter is configured to; receive a first voltage from the battery before the resistive load is connected to the battery and convert the first voltage to a first digital signal; receive a second voltage from the battery after the resistive load is connected to the battery and convert the second voltage to a second digital signal; and receive a third voltage from the battery after the resistive load is disconnected from the battery and convert the third voltage to a third digital signal; a microcontroller configured to; calculate voltage drop data as a function of the first, second, and third digital signals; retrieve voltage profile data corresponding to a desired parameter from a memory; and compare the voltage drop data to the voltage profile data to determine a value of the desired parameter; and a display to generate the value of the desired parameter for display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for obtaining a parameter measurement of a battery, the system comprising:
a hand-held parameter measurement device comprising; a first contactor to connect to a first terminal of the battery, the first contactor comprising a first pair of leads; a second contactor to connect to a second terminal of the battery, the second contactor comprising a second pair of leads; a switch configured to selectively connect a resistive load to the battery via one of the first pair of leads and one of the second pair of leads; an analog to digital (AD) converter connected to the battery via another one of the first pair of leads and another one of the second pair of leads and wherein the AD converter is configured to; receive a first voltage from the battery before the resistive load is connected to the battery and convert the first voltage to a first digital signal; and receive a second voltage from the battery after the resistive load is connected to the battery and convert the second voltage to a second digital signal, wherein the second voltage decreases from a maximum level to a minimum level over a period time; and a processor configured to determine a first open circuit voltage (OCV) as a function of the first digital signal and to determine a plurality of closed circuit voltage values (CCVs) as a function of the second digital signal over the period of time, and wherein the processor comprises modules executable on the processor, the modules comprising; a voltage curve module to define voltage drop curve data as a function of the OCV and the plurality CCVs; a profile retrieval module to retrieve profile data corresponding to a voltage drop profile for a desired parameter; a comparison module to compare the voltage drop data to the profile data to determine a value of the desired parameter; and a display module to generate the value of the desired parameter for display on a display. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for measuring a parameter of a battery, the method steps comprising:
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connecting a first pair of leads to a first terminal of the battery; connecting a second pair of leads to a second terminal of the battery; selectively connecting a resistive load to the battery via one of the first pair of leads and one of the second pair of leads; connecting an analog to digital (AD) converter to the battery via another one of the first pair of leads and another one of the second pair of leads; receiving a first voltage at the AD converter from the battery before connecting the resistive load; converting the first voltage to a first digital signal at the AD converter; receiving a second voltage at the AD converter from the battery after connecting the resistive load, wherein the second voltage decreases from a maximum level to a minimum level over a period time; converting the second voltage to a second digital signal at the AD converter; receiving a third voltage at the AD converter from the battery after disconnecting the resistive load from the battery; converting the third voltage to a third digital signal at the AD converter; processing the first, second, and third digital signals at a processor to calculate voltage drop data; retrieving, at the processor, voltage profile data corresponding to a desired parameter from a memory and comparing the voltage drop data to the voltage profile data to determine a value of the desired parameter; and generating the value of the desired parameter for display. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification