Method and system for determining state-of-health of a lead-acid defibrillator battery using an intelligent system
First Claim
1. A method of determining a state-of-health of a lead acid battery, the method comprising:
- detecting an impedance characteristic of the battery at one or more selected frequencies;
counting a number of complete charge/discharge cycles that the lead acid battery undergoes; and
determining said state-of-health of said lead acid battery from a fuzzy system trained in a relationship between said impedance characteristic and said number of cycles of the lead acid battery and said state-of-health, wherein said state-of-health is a function of and varies with ability of the battery to deliver power required by a load and capacity of the battery to meet requirements of the load.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of and system for determining the state-of-health of a lead acid battery of the type commonly used in portable external defibrillators comprises detecting an impedance characteristic of the battery at at least one selected frequency, counting the number of complete charge/discharge cycles that the battery undergoes, and determining the state of health of the battery from a fuzzy system trained in a relationship between the impedance characteristic and the cycle number of the lead acid battery and the state-of-health, wherein the state-of-health is a function of and varies with the battery'"'"'s ability to deliver power required by the load and the battery'"'"'s capacity to meet load requirements.
66 Citations
18 Claims
-
1. A method of determining a state-of-health of a lead acid battery, the method comprising:
-
detecting an impedance characteristic of the battery at one or more selected frequencies;
counting a number of complete charge/discharge cycles that the lead acid battery undergoes; and
determining said state-of-health of said lead acid battery from a fuzzy system trained in a relationship between said impedance characteristic and said number of cycles of the lead acid battery and said state-of-health, wherein said state-of-health is a function of and varies with ability of the battery to deliver power required by a load and capacity of the battery to meet requirements of the load. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system for detecting a state-of-health of a lead acid battery, the system comprising:
-
a microcontroller adapted to receive inputs from an impedance measurement device and a voltage measurement device, the microcontroller including software causing the microcontroller to perform operations including;
storing an input value corresponding to an impedance characteristic at one or more selected frequencies;
storing an input value corresponding to a cycle number, said cycle number being determined using said voltage measurement device;
inputting each said input value into a fuzzy system trained in a relationship between each said input value and said state-of-health, said state-of-health being a function of ability of the battery to deliver power required by a load and capacity of the battery to meet requirements of the load; and
storing an output value corresponding to said state-of-health of the battery, said output value being outputted from the fuzzy system. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A portable defibrillator having a lead acid battery, the portable defibrillator comprising:
-
a microcontroller adapted to receive inputs from an impedance measurement device for measuring an impedance of said lead acid battery and a voltage measurement device for measuring a voltage of said lead acid battery, the microcontroller including software causing the microcontroller to perform operations including;
storing an input value corresponding to an impedance characteristic at one or more selected frequencies;
storing an input value corresponding to a cycle number, said cycle number being determined using said voltage measurement device;
inputting each said input value into a fuzzy system trained in a relationship between each said input value and said a state-of-health, said state-of-health being a function of ability of the battery to deliver power required by a load and capacity of the battery to men lead requirements of the load; and
storing an output value corresponding to said state-of-health of the battery, said output value being outputted from the fuzzy system. - View Dependent Claims (17, 18)
-
Specification