Insulation resistance detection apparatus
An insulation resistance detection apparatus includes: a first switch connected to a high potential side of a battery assembly including plural battery cells connected in series; a second switch connected to a low potential side of the battery assembly; a detection resistor; a controller configured to turn on one of the first switch and the second switch and turn off the other of the first switch and the second switch to form a series connection circuit including the battery assembly, an insulation resistor of the battery assembly, and the detection resistor, and calculate insulation resistance based on a voltage applied to the detection resistor, in which the first switch is connected between two battery cells on the high potential side among the plural battery cells.
1. An insulation resistance detection apparatus comprising:
a first switch connected to a high potential side of a battery assembly including a plurality of battery cells connected in series;
a second switch connected to a low potential side of the battery assembly;
a detection resistor; and
a controller configured to
turn on one of the first switch and the second switch and turn off the other of the first switch and the second switch to form a series connection circuit including the battery assembly, an insulation resistor of the battery assembly, and the detection resistor, and
calculate insulation resistance based on a voltage applied to the detection resistor, wherein
the first switch is connected between two battery cells on the high potential side among the plurality of battery cells, and
the second switch is connected between two battery cells on the low potential side among the plurality of battery cells.
2. The insulation resistance detection apparatus according to claim 1 , wherein
the insulation resistor is at least a part of an insulating case that houses the battery assembly.
3. The insulation resistance detection apparatus according to claim 1 , wherein
the controller is configured to determine whether there is an electric leakage based on the calculated insulation resistance.
4. The insulation resistance detection apparatus according to claim 3 , wherein
the controller is configured to warn a user using a warning device in response to the electric leakage being determined.
5. An insulation resistance detection method comprising:
connecting a first switch that is connected to a high potential side of a battery assembly including a plurality of battery cells connected in series between two battery cells on the high potential side among the plurality of battery cells;
connecting a second switch that is connected to a low potential side of the battery assembly between two battery cells on the low potential side among the plurality of battery cells;
turning on one of the first switch and the second switch and turning off the other of the first switch and the second switch to form a series connection circuit including the battery assembly, an insulation resistor of the battery assembly, and a detection resistor; and
calculating insulation resistance based on a voltage applied to the detection resistor.
6. The insulation resistance detection method according to claim 5 , wherein
the insulation resistor is at least a part of an insulating case that houses the battery assembly.
7. The insulation resistance detection method according to claim 5 , further comprising:
determining whether there is an electric leakage based on the calculated insulation resistance.
8. The insulation resistance detection method according to claim 7 , further comprising:
warning a user using a warning device in response to the electric leakage being determined.