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US 12,742,686 B2Granted
Optically operating temperature sensor, use of said temperature sensor and battery cell assembly comprising at least one temperature sensor
AssigneeKistler Holding AG
InventorMarian Gragert
Life of this patent
Estimating the term…
Abstract
An optically operating temperature sensor includes at least one optical fiber configured and disposed for guiding light rays and including a plurality of optical elements configured and disposed for influencing the light rays which can be introduced into the at least one optical fiber, wherein the optical elements and the at least one optical fiber between the optical elements form an assembly together with a protective element.
Claims18
An optically operating temperature sensor configured for attachment to a measurement object, the optically operating temperature sensor comprising:
- an optical fiber strand configured to elongate along a longitudinal axis and defined by an external surface extending along the longitudinal axis, wherein the optical fiber strand includes at least one optical fiber disposed within the optical fiber strand and spaced apart from the external surface;
- wherein the at least one optical fiber is configured to extend along the longitudinal axis between a first end and a second end spaced apart from the first end along the longitudinal axis and disposed for guiding light rays along the longitudinal axis;
- at least a first optical element arranged axially spaced apart from at least a second optical element along the at least one optical fiber, wherein the first optical element and the second optical element are disposed between the first and second ends of the at least one optical fiber, and wherein each of the first and second optical elements is configured and disposed for influencing the light rays which can be introduced into the at least one optical fiber;
- wherein the first optical element is a first optical grating, the second optical element is a second optical grating, and each of the first and second optical gratings is configured and disposed to employ FSI technology during temperature detection;
- and
- a rigid protective element disposed in continuous contact with the optical fiber strand's external surface along the longitudinal axis between the at least first and second optical elements of the at least one optical fiber, wherein said protective element is electrically insulated at least on a side thereof that is configured to face a surface of the measurement object and that can be connected with the measurement object, wherein the coefficient of thermal expansion of the rigid protective element and the coefficient of thermal expansion of the at least one optical fiber differ from each other by not more than 20% of the coefficient of thermal expansion of the at least one optical fiber.
3 more elements
A battery cell assembly of an electric vehicle, the battery assembly comprising:
- a plurality of battery cells including a first battery cell defining a surface thereof;
- a temperature sensor connected to the surface of the first battery cell in a thermally conductive manner, wherein the temperature sensor includes:
- an optical fiber strand configured to elongate along a longitudinal axis and defined by an external surface extending along the longitudinal axis, wherein the optical fiber strand includes at least one optical fiber disposed within the optical fiber strand and spaced apart from the external surface;
- at least one optical fiber configured to extend along the longitudinal axis between a first end and a second end spaced apart from the first end along the longitudinal axis and disposed for guiding light rays along the longitudinal axis;
- at least a first optical element arranged axially spaced apart from at least a second optical element along the at least one optical fiber, wherein the first optical element and the second optical element are disposed between the first and second ends of the at least one optical fiber, and wherein each of the first and second optical elements is configured and disposed for influencing the light rays which can be introduced into the at least one optical fiber;
- wherein the first optical element is a first optical grating, the second optical element is a second optical grating, and each of the first and second optical gratings is configured and disposed to employ FSI technology during temperature detection;
- and
- a rigid protective element disposed in continuous contact with the optical fiber strand's external surface along the longitudinal axis between the at least first and second optical elements of the at least one optical fiber, wherein said rigid protective element is electrically insulated at least on a side thereof that is connected with the surface of the first battery cell, wherein the coefficient of thermal expansion of the rigid protective element and the coefficient of thermal expansion of the at least one optical fiber differ from each other by not more than 20% of the coefficient of thermal expansion of the at least one optical fiber.
5 more elements
Dependencies are inferred from the claim text.