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US 11,307,254 B2Granted
Contactor failure rate prediction system and method
AssigneeLG Energy Solution, Ltd.
InventorsHyunki Cho, Chang Hyun Sung, Sang Hoon Lee, Yean Sik Choi
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Abstract
A system of predicting a failure rate of a contactor before the generation of a failure by counting a lifespan index of the contactor based on normality of through-currents of a primary side and a secondary side of the contactor, and determining that a failure rate of the contactor increases when a count value for an abnormal through-current exceeds a predetermined threshold value.
Claims10
A system for predicting a failure rate of a contactor connected to a battery, the system comprising:
- an on/off detecting unit configured to detect an on/off operation of the contactor;
- a lifespan index counting unit configured to count a lifespan index of the contactor based on whether an electric conducting state of the contactor corresponds to a predetermined electric conducting state during the on operation of the contactor;
- and
- a failure rate predicting unit configured to predict a failure rate of the contactor based on the counted lifespan index,
- wherein the lifespan index counting unit includes:
- a first measuring unit, which measures control voltage values of primary-side upper and lower ends of the contactor;
- a second measuring unit, which measures control current values of the primary-side tipper and lower ends of the contactor;
- a third measuring unit, which measures an inrush current value of a secondary side of the contactor;
- and
- a fourth measuring unit, which measures a through-current value flowing through the secondary side of the contactor.
7 more elements
A method of predicting a failure rate of a contactor connected to a battery, the method comprising:
- detecting, by an on/off detecting unit, an on/off operation of the contactor;
- counting, by a lifespan index counting unit, a lifespan index of the contactor based on whether an electric conducting state for the contactor corresponds to a predetermined electric conducting state during an on-operation of the contactor;
- and
- predicting, by a failure rate predicting unit, a failure rate of the contactor based on the counted lifespan index,
- wherein the counting of the lifespan index of the contactor includes:
- measuring, by a first measuring unit, control voltage values of primary-side upper and tower ends of the contactor;
- measuring, by a second measuring unit, control current values of the primary-side upper and lower ends of the contactor;
- measuring, by a third measuring unit, an inrush current value of a secondary side of the contactor;
- and
- measuring, by a fourth measuring unit, a through-current value flowing through the secondary side of the contactor.
7 more elements
Dependencies are inferred from the claim text.