| CPC G01N 25/72 (2013.01) [B60K 1/04 (2013.01); B60L 58/24 (2019.02); B60K 2001/0438 (2013.01)] | 9 Claims |
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1. A detection device configured to detect a decrease in heat insulation performance of a battery pack mounted at an electrically powered vehicle,
the battery pack including a battery and at least one battery temperature sensor capable of detecting a temperature of the battery which are housed in a case having a heat insulation property, and
the electrically powered vehicle including, outside the battery pack, an environmental temperature sensor capable of detecting an environmental temperature around the electrically powered vehicle,
the detection device comprising:
a heat insulation performance derivation unit configured to derive a heat insulation performance value, which is an evaluation value of the heat insulation performance, based on a temperature change of the battery detected by the at least one battery temperature sensor and an environmental temperature detected by the environmental temperature sensor in a predetermined period in which the electrically powered vehicle is stopped;
a determination unit configured to determine, based on the heat insulation performance value derived by the heat insulation performance derivation unit and a predetermined reference value, whether the decrease in the heat insulation performance occurs; and
an output unit configured to output, when the determination unit determines that the decrease in the heat insulation performance occurs, detection information indicating that the decrease in the heat insulation performance occurs.
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