Measuring and monitoring a power source
First Claim
1. A battery sensor for testing a battery comprising:
- (a) a microcontroller configured to;
(i) analyze frequencies of background noise at a battery to be tested during a test operation;
(ii) determine, based on an analysis of the background noise, a duty cycle of a desired pulse width modulation (PWM) signal to be applied to the battery, the duty cycle being selected such that, when applied to the battery, it at least approximates an AC signal having a frequency that has been determined by the microcontroller to provide optimal test results in view of the background noise;
(iii) generate the desired PWM signal;
(iv) analyze a response from the battery resulting from application of the PWM signal thereto; and
(v) based on the response, determine at least one attribute of the battery; and
,(b) circuitry, including a switch, for applying the PWM signal to the battery.
3 Assignments
0 Petitions
Accused Products
Abstract
Battery testing sensors, and systems and methods for testing batteries, are disclosed. Each battery sensor has a microcontroller programmed to analyze the frequencies of noise or other undesirable signals (“background noise”) present at a battery to be tested, and to determine the duty cycle of a desired pulse width modulation (PWM) signal to be applied to the battery in view of the background noise. Duty cycles of desired PWM signals are selected such that, when applied to the battery, they will at least approximate an AC signal having a frequency that has been determined to provide optimal test results in view of the background noise. The microcontroller analyzes the battery'"'"'s response from application of the PWM signal thereto. Consequently, measurement errors from background noise present at the battery are minimized. Based on the response, attributes of the battery, such as internal admittance, voltage, current, and temperature, are determined.
35 Citations
24 Claims
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1. A battery sensor for testing a battery comprising:
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(a) a microcontroller configured to;
(i) analyze frequencies of background noise at a battery to be tested during a test operation;
(ii) determine, based on an analysis of the background noise, a duty cycle of a desired pulse width modulation (PWM) signal to be applied to the battery, the duty cycle being selected such that, when applied to the battery, it at least approximates an AC signal having a frequency that has been determined by the microcontroller to provide optimal test results in view of the background noise;
(iii) generate the desired PWM signal;
(iv) analyze a response from the battery resulting from application of the PWM signal thereto; and
(v) based on the response, determine at least one attribute of the battery; and
,(b) circuitry, including a switch, for applying the PWM signal to the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery testing system comprising:
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(a) a plurality of battery sensors, each sensor adapted to be associated with one of a plurality of batteries to be tested, each sensor comprising; (i) a microcontroller configured to;
(1) analyze frequencies of background noise at a battery to be tested during a test operation;
(2) determine, based on an analysis of the background noise, a duty cycle of a desired pulse width modulation (PWM) signal to be applied to the battery, the duty cycle being selected such that, when applied to the battery, it at least approximates an AC signal having a frequency that has been determined by the microcontroller to provide optimal test results in view of the background noise;
(3) generate the desired PWM signal;
(4) analyze a response from the battery resulting from application of the PWM signal thereto; and
, (5) based on the response, determine at least one attribute of the battery; and
,(ii) circuitry, including a switch, for applying the PWM signal to the battery; and
,(iii) a communications interface; (b) a controller adapted to communicate with (i) the sensors via each sensor'"'"'s communications interface and (ii) a remote management server. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A battery testing method comprising:
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a) analyzing frequencies of background noise at a battery under test; b) determining, based on an analysis of the background noise, a duty cycle of a pulse width modulation (PWM) signal to be applied to the battery, the duty cycle being selected such that, when applied to the battery, it at least approximates an AC signal having a frequency that has been determined by the microcontroller to provide optimal test results in view of the background noise; c) generating the PWM signal, and applying the PWM signal to the battery under test; d) analyzing a response from the battery resulting from application of the PWM signal thereto; and
,e) based on the response, determining at least one attribute of the battery. - View Dependent Claims (21, 22, 23, 24)
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Specification