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US 12,000,795 B2Granted
Eddy current sensor having improved crack detection capability, and eddy current inspection device including same
AssigneeLG Energy Solution, Ltd.
InventorsSeok Jin Kim, Su Taek Jung, Sang Hyun Koo, Jung Hoon Lee
Life of this patent
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Abstract
An eddy current sensor for deriving an eddy current and sensing the derived eddy current in order to detect a crack in a battery cell, the eddy current sensor comprises: a core unit in which a coil is wound around a magnetic member; and a case for accommodating the core unit of which there are at least two, which are arranged so that the central axis of the coil is oriented in the thickness direction of the battery cell.
Claims13
An eddy current sensor for inducing an eddy current and detecting the induced eddy current to detect a crack in a battery cell, comprising:
- at least two core units, each core unit including a coil wound around a magnetic member;
- and
- a case which accommodates the at least two core units,
- wherein each of the core units is arranged such that a central axis of the coil is oriented in a thickness direction of a battery cell,
- wherein the case comprises:
- a first stage extending toward a longitudinal direction of the battery cell and having a step corresponding to a shape extending from the battery cell to an electrode lead, and having a cuboid shape;
- and
- a second stage extending toward the electrode lead in a thickness direction of the battery cell from the first stage and having a cuboid shape,
- wherein the first stage and the second stage are integrated to form the step, and
- wherein an area of a side parallel to a ground of the first stage is larger than an area of a side parallel to a ground of the second stage.
7 more elements
Dependencies are inferred from the claim text.