Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2011-06-14
2011-06-14
Lau, Tung S (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
Reexamination Certificate
active
07962300
ABSTRACT:
A battery state judging method is provided capable of properly judging a state of a lead-acid battery by measuring voltages without measuring currents. A state of the battery is judged by obtaining, in advance, a DC internal resistance r0of a same type battery in a new and fully-charged state; calculating, in advance, a load R [R=r0×Vst0/(OCV0−Vst0)] at an engine starting time (S112) from an open-circuit voltage OCV0(S104) and a lowest voltage Vst0(S108) at the engine starting time, both measured when the loaded battery is in a new and fully-charged state, and the DC internal resistance r0; calculating a DC internal resistance r [(r=R/(OCV−Vst)/Vst)] of the loaded battery from an open-circuit voltage OCV (S104) and a lowest voltage Vst (S108), both measured when the loaded battery is in a deteriorated/insufficiently-charged state, and the load R; and comparing r and r0.
REFERENCES:
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European Search Report dated Oct. 6, 2010 issued in corresponding European Patent Application No. EP 06 83 4499.
Lau Tung S
Roberts Mlotkowski Safran & Cole P.C.
Shin-Kobe Electric Machinery Co. Ltd.
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