BATTERY PACK MONITORING DEVICE

A battery pack monitoring device includes a battery pack, at least one first wireless communicator, at least one second wireless communicator, and a control device. The battery pack is installed in a vehicle and includes a battery. The at least one first wireless communicator is disposed inside the battery pack and can perform wireless communication. The at least one second wireless communicator is disposed in the vehicle outside the battery pack and can perform wireless communication. The control device includes one or more processors, and one or more memories. The one or more processors are configured to execute a process including trying the wireless communication between the first wireless communicator and the second wireless communicator, and estimating the presence and/or absence of a damage to the battery pack based on an establishment state of the wireless communication between the first wireless communicator and the second wireless communicator.