초록 ▼

A method for determining state of charge (SOC) of an electrochemical device using fuzzy logic (i.e., an intelligent system) is presented. State of charge of an electrochemical device is determined by an internal characteristic or parameter (or external operating and environmental conditions) with an

A method for determining state of charge (SOC) of an electrochemical device using fuzzy logic (i.e., an intelligent system) is presented. State of charge of an electrochemical device is determined by an internal characteristic or parameter (or external operating and environmental conditions) with an intelligent system. The electrochemical device comprises such devices as primary ("throwaway") batteries, rechargeable batteries, fuel cells, a hybrid battery containing a fuel cell electrode and electrochemical supercapacitors. The intelligent system is trained in the relationship between the characteristic of the electrochemical device and the SOC of the electrochemical device.

대표청구항 ▼

[ What is claimed is:] [36.] A method of determining a state of charge of an electrochemical device, comprising:detecting at least one internal characteristic of said electrochemical device; anddetermining said state of charge of said electrochemical device from an intelligent system trained in a re

[ What is claimed is:] [36.] A method of determining a state of charge of an electrochemical device, comprising:detecting at least one internal characteristic of said electrochemical device; anddetermining said state of charge of said electrochemical device from an intelligent system trained in a relationship between said at least one internal characteristic and said state of charge, said intelligent system comprising an additive fuzzy system, and said additive fuzzy system mathematically comprising: ]EQU6 ] where, w.sub.j is a weight of rule j,a.sub.j.sup.i represents if-part set function, membership function of input i of rule j on input i,a.sub.j represents joint if-part set function, result of "a.sub.j.sup.1 `and` a.sub.j.sup.2 . . . `and` a.sub.j.sup.i, that states a degree to which an input x belongs to the if-part fuzzy set a.sub.j,B.sub.j represents then-part set function, membership function j on an output,V.sub.j is a finite positive volume or area of the then-part set B.sub.j,c.sub.j is a centroid of the then-part set B.sub.j,B.sub.j is a scaled then-part set, scaled output membership function j, result of a.sub.j (x)B.sub.j, andB is an output set prior to defuzzification. [38.] A system for determining a state of charge of an electrochemical device, comprising:a sensor for detecting at least one internal characteristic of said electrochemical device and providing an internal sensed signal indicative thereof; anda signal processor responsive to said internal sensed signal for determining said state of charge of said electrochemical device and providing a state of charge signal, said signal processor including an intelligent system trained in a relationship between said at least one internal characteristic and said state of charge, said intelligent system comprising an additive fuzzy system, said additive fuzzy system mathematically comprising: ]EQU7 ] where, w.sub.j is a weight of rule j,a.sub.j.sup.i represents if-part set function, membership function of input i of rule j on input i,a.sub.j represents joint if-part set function, result of "a.sub.j.sup.1 `and` a.sub.j.sup.2 . . . `and` a.sub.j.sup.i, that states a degree to which an input x belongs to the if-part fuzzy set a.sub.j,B.sub.j represents then-part set function, membership function j on an output,V.sub.j is a finite positive volume or area of the then-part set B.sub.j,c.sub.j is a centroid of the then-part set B.sub.j,B.sub.j is a scaled then-part set, scaled output membership function j, result of a.sub.j (x)B.sub.j, andB is an output set prior to defuzzification.