Secondary battery diagnosing apparatus and method
AssigneeLG Energy Solution, Ltd.
InventorJi-Eun LEE
Life of this patent
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Abstract
A secondary battery diagnosing apparatus includes a thickness sensor configured to sense a change in thickness of a secondary battery according to a volume change of a negative electrode active material while the secondary battery comprising a negative electrode active material containing silicon or silicon oxide is being charged or discharged; and a processor configured to estimate a capacity ratio, which is a ratio of a capacity provided by the silicon or the silicon oxide to a capacity of the secondary battery provided by the negative electrode active material, using a sensing result of the thickness sensor, and diagnose the state of the secondary battery based on the capacity ratio.
Claims15
A secondary battery diagnosing apparatus for diagnosing a state of a secondary battery comprising a negative electrode active material containing silicon or silicon oxide, the secondary battery diagnosing apparatus comprising:
- a thickness sensor configured to sense a change in thickness of the secondary battery according to a volume change of the negative electrode active material while the secondary battery is being charged or discharged;
- and
- a processor configured to estimate a capacity ratio, which is a ratio of a capacity provided by the silicon or the silicon oxide to a capacity of the secondary battery provided by the negative electrode active material, using a sensing result of the thickness sensor, and diagnose the state of the secondary battery based on the capacity ratio.
A secondary battery diagnosing method for diagnosing a state of a secondary battery comprising a negative electrode active material containing silicon or silicon oxide, the secondary battery diagnosing method comprising:
- sensing, with a thickness sensor, a change in thickness change of the secondary battery according to a volume change of the negative electrode active material while the secondary battery is being charged or discharged;
- and;
- executing computing instructions configured to run on a processor to perform:
- estimating a capacity ratio, which is a ratio of a capacity provided by the silicon or the silicon oxide to a capacity of the secondary battery provided by the negative electrode active material, using a sensing result of the thickness sensor;
- and
- diagnosing the state of the secondary battery based on the capacity ratio.
Dependencies are inferred from the claim text.