System and method for determining an amount of degradation of a medical device battery
First Claim
1. A method of determining an amount of degradation of an autoclavable lithium battery for a medical device, the method comprising:
- providing an autoclavable lithium battery for a medical device;
receiving a charging signal from a charging device;
initiating a charging cycle to charge a cell of the battery based on the charging signal, the charging cycle comprising a constant current phase and a constant voltage phase;
determining a first time at which the constant voltage phase begins;
monitoring a current provided to the cell during at least a portion of the constant voltage phase;
determining a second time at which the current provided during the constant voltage phase reaches a predetermined threshold;
calculating a current taper time based on the difference between the second time and the first time; and
determining an amount of degradation of the battery based on the current taper time.
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Accused Products
Abstract
A method, a battery, and a system determine an amount of degradation of the battery. The method includes providing an autoclaveable lithium battery for a medical device, receiving a charging signal from a charging device, and initiating a charging cycle to charge a cell of the battery based on the charging signal. The charging cycle includes a constant current phase and a constant voltage phase. The method also includes monitoring a current provided to the cell during at least a portion of the constant voltage phase, calculating a current taper time based on the current provided during the constant voltage phase, and determining an amount of degradation of the battery based on the current taper time.
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Citations
17 Claims
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1. A method of determining an amount of degradation of an autoclavable lithium battery for a medical device, the method comprising:
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providing an autoclavable lithium battery for a medical device; receiving a charging signal from a charging device; initiating a charging cycle to charge a cell of the battery based on the charging signal, the charging cycle comprising a constant current phase and a constant voltage phase; determining a first time at which the constant voltage phase begins; monitoring a current provided to the cell during at least a portion of the constant voltage phase; determining a second time at which the current provided during the constant voltage phase reaches a predetermined threshold; calculating a current taper time based on the difference between the second time and the first time; and determining an amount of degradation of the battery based on the current taper time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An autoclavable lithium battery for a medical device, the battery comprising:
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a cell for storing a charge; a charging circuit configured to receive a charging signal from a charging device and to responsively initiate a charging cycle to charge the cell, wherein the charging cycle comprises a constant current phase and a constant voltage phase; a battery controller coupled to the charging circuit, the battery controller configured to; determine a first time at which the constant voltage phase begins; monitor a current provided to the cell during at least a portion of the constant voltage phase; determine a second time at which the current provided during the constant voltage phase reaches a predetermined threshold; calculate a current taper time based on the difference between the second time and the first time; and determine an amount of degradation of the battery based on the current taper time. - View Dependent Claims (8, 9, 10)
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11. A system, comprising:
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an autoclavable lithium battery for a medical device; and a module for charging the battery, the module comprising; a module controller; and a transmission component configured to provide a charging signal to the battery, wherein the battery comprises; a cell for storing a charge; a charging circuit configured to receive the charging signal from the module and to responsively initiate a charging cycle to charge the cell, wherein the charging cycle comprises a constant current phase and a constant voltage phase; a battery controller coupled to the charging circuit, the battery controller configured to monitor a current provided to the cell during at least a portion of the constant voltage phase, wherein one of the module controller and the battery controller is configured to; determine a first time at which the constant voltage phase begins; determine a second time at which the current provided during the constant voltage phase reaches a predetermined threshold; calculate a current taper time based on the difference between the second time and the first time; and determine an amount of degradation of the battery based on the current taper time. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification