Battery monitoring circuit
First Claim
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1. A battery monitoring circuit, comprising:
- a high counter that increments when a sense voltage measurement is above a threshold;
a low counter that increments when the sense voltage measurement is below the threshold;
state machine circuitry coupled to the high counter and to the low counter;
open circuit voltage monitoring circuitry coupled to the state machine circuitry; and
resistance monitoring circuitry coupled to the state machine circuitry;
wherein the state machine circuitry transitions from a low-load state to a high-load state when the high counter reaches a first high counter limit; and
wherein the state machine circuitry transitions from the high-load state to the low-load state when the low counter reaches a second low counter limit.
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Abstract
A battery monitoring circuit is described. The battery monitoring circuit includes a high counter that increments when a sense voltage measurement is above a threshold. The battery monitoring circuit also includes a low counter that increments when the sense voltage measurement is below the threshold. The battery monitoring circuit further includes state machine circuitry coupled to the high counter and to the low counter. The battery monitoring circuit additionally includes open circuit voltage monitoring circuitry coupled to the state machine circuitry. The battery monitoring circuit also includes resistance monitoring circuitry coupled to the state machine circuitry.
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Citations
38 Claims
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1. A battery monitoring circuit, comprising:
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a high counter that increments when a sense voltage measurement is above a threshold; a low counter that increments when the sense voltage measurement is below the threshold; state machine circuitry coupled to the high counter and to the low counter; open circuit voltage monitoring circuitry coupled to the state machine circuitry; and resistance monitoring circuitry coupled to the state machine circuitry; wherein the state machine circuitry transitions from a low-load state to a high-load state when the high counter reaches a first high counter limit; and wherein the state machine circuitry transitions from the high-load state to the low-load state when the low counter reaches a second low counter limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for monitoring a battery, comprising:
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incrementing a high counter when a sense voltage measurement is above a threshold; incrementing a low counter when the sense voltage measurement is below the threshold; controlling a state based on a high counter limit and a low counter limit; controlling open circuit voltage monitoring circuitry based on the state; and controlling resistance monitoring circuitry based on the state; wherein the state transitions from a low-load state to a high-load state when the high counter reaches a first high counter limit; and wherein the state transitions from the high-load state to the low-load state when the low counter reaches a second low counter limit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A computer-program product for monitoring a battery, comprising a non-transitory tangible computer-readable medium having instructions that, when run on a processor, cause the processor to:
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cause a high counter to increment when a sense voltage measurement is above a threshold; cause a low counter to increment when the sense voltage measurement is below the threshold; cause a battery monitoring circuit to control a state based on a high counter limit and a low counter limit; cause the battery monitoring circuit to control open circuit voltage monitoring circuitry based on the state; and cause the battery monitoring circuit to control resistance monitoring circuitry based on the state; wherein the state transitions from a low-load state to a high-load state when the high counter reaches a first high counter limit; and wherein the state transitions from the high-load state to the low-load state when the low counter reaches a second low counter limit. - View Dependent Claims (28, 29, 30, 31, 32)
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33. An apparatus for monitoring a battery, comprising:
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means for incrementing a high counter when a sense voltage measurement is above a threshold; means for incrementing a low counter when the sense voltage measurement is below the threshold; means for controlling a state based on a high counter limit and a low counter limit; means for controlling open circuit voltage monitoring circuitry based on the state; and means for controlling resistance monitoring circuitry based on the state; wherein the state transitions from a low-load state to a high-load state when the high counter reaches a first high counter limit; and wherein the state transitions from the high-load state to the low-load state when the low counter reaches a second low counter limit. - View Dependent Claims (34, 35, 36, 37, 38)
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Specification