Secondary battery degradation determination device
The secondary battery degradation determination device includes: a plurality of voltage sensors connected to respective batteries; a measurement current application device configured to apply a measurement current including an AC component to each battery group; and a controller. A sensor wireless communicator configured to wirelessly transmit a measurement value of a voltage of the AC component is provided to each voltage sensor. One current sensor is provided for a parallel-connection assembly of the battery groups. The controller is configured to receive the measurement value transmitted by the sensor wireless communicator, calculate an internal resistance of each battery by using the measurement value and a detection value of the current sensor, and determine degradation of the battery on the basis of the internal resistance.
NTN CORPORATION
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inventional inventional additional inventional inventional inventional inventional inventional
Hiroyuki
Yamada