Traction battery for an electrically or semi-electrically driven vehicle
A traction battery for an electrically or semi-electrically driven vehicle. The traction battery includes at least one temperature sensor. The temperature sensor is configured as an infrared sensor and includes a sensor array having several sensor elements for spatially resolved detection of the temperature of a surface of one or more components of the traction battery. A deflection optic is arranged between the respective surface and the sensor array, via which optic the temperature sensor detects the respective surface.
1 . A traction battery for an electrically or semi-electrically driven vehicle, wherein the traction battery comprises:
a battery module housing having an interior region bounded by interconnected walls, said interconnected walls including a top wall,
at least one temperature sensor in the form of an infrared sensor that includes a sensor array having several sensor elements for spatially resolved detection of a temperature of a surface of one or more components of the traction battery, and
a deflection optic arranged in the interior region of the battery module housing and above the surface,
wherein the temperature sensor detects the temperature of the surface via the deflection optic,
wherein the deflection optic and the infrared sensor are arranged in the interior region of the battery module housing and are each suspended from the top wall of the housing and spaced apart from the top wall of the housing,
wherein an optical axis of the infrared sensor is arranged in a longitudinal direction of the vehicle, and
wherein the deflection optic is angled relative to the top wall and the optical axis of the infrared sensor.
2 . The traction battery according to claim 1 , wherein the deflection optic is configured so as to cause a beam deflection of 70° to 110°.
3 . The traction battery according to claim 1 , wherein the temperature sensor comprises a mapping optic for mapping the surface to be measured onto the sensor array.
4 . The traction battery according to claim 1 , wherein the one or more components of the traction battery is selected from a group consisting of:
a battery cell,
a battery module comprising several interconnected battery cells,
a module connector,
a contactor,
a power bus,
a connector,
a current sensor, and
a fuse.
5 . The traction battery according to claim 1 , wherein the surface of the component detected by the temperature sensor includes a coating, wherein a material of the coating has a higher emissivity than the coated material, wherein the material of the coating has a predetermined emissivity of more than 0.8 in an area of the infrared spectrum relevant to the infrared sensor.
6 . A motor vehicle comprising the traction battery of claim 1 .
7 . The traction battery according to claim 1 , wherein the deflection optic is angled obliquely relative to the top wall and the optical axis of the infrared sensor.
8 . The traction battery according to claim 1 , wherein the deflection optic and the infrared sensor are spaced apart from each other in the longitudinal direction of the vehicle.
9 . The traction battery according to claim 1 , wherein the infrared sensor is aimed at the deflection optic.
10 . The traction battery according to claim 9 , wherein the optical axis is not aimed at the top wall or the surface.
11 . The traction battery according to claim 1 , wherein the deflection optic comprises a mirror or is formed by a mirror.
12 . The traction battery according to claim 11 , wherein the mirror is configured as a metal foil mirror.
13 . The traction battery according to claim 11 , wherein the mirror is metallically coated.
14 . The traction battery according to claim 1 , wherein the traction battery comprises a battery module having several battery cells, wherein the battery cells are arranged so as to be stacked one behind the other in a stacking direction (Y) in the battery module housing.
15 . The traction battery according to claim 14 , wherein the infrared sensor is arranged such that the optical axis of the infrared sensor runs either parallel or approximately parallel to the stacking direction (Y) of the battery cells.
16 . The traction battery according to claim 14 , wherein the temperature sensor detects the temperature of the respective surface of all battery cells of the battery module via the deflection optic.
17 . The traction battery according to claim 14 , wherein the stacking direction (Y) is oriented in said longitudinal direction of the vehicle.