A monitoring system includes monitoring devices provided in a monitored device, and a controller that wirelessly communicates with the monitoring devices to acquire monitoring information. In an operating state of the monitored device, the controller and the monitoring devices establish individual connections in which the controller acting as a communication master performs wireless communication with each of the monitoring devices acting as communication slaves. In a non-operating state of the monitored device, the controller and the monitoring devices maintain communication between the controller and the monitoring devices by establishing a sequential connection. In the sequential connection, the controller acting as a communication master performs wireless communication with one of the monitoring devices acting as a communication slave, and one of the monitoring devices, in sequence, acting as a communication master performs wireless communication with another one of the monitoring devices acting as a communication slave.

A monitoring system includes monitoring devices provided in a monitored device, and a controller that wirelessly communicates with the monitoring devices to acquire monitoring information. In an operating state of the monitored device, the controller and the monitoring devices establish individual connections in which the controller acting as a communication master performs wireless communication with each of the monitoring devices acting as communication slaves. In a non-operating state of the monitored device, the controller and the monitoring devices maintain communication between the controller and the monitoring devices by establishing a sequential connection. In the sequential connection, the controller acting as a communication master performs wireless communication with one of the monitoring devices acting as a communication slave, and one of the monitoring devices, in sequence, acting as a communication master performs wireless communication with another one of the monitoring devices acting as a communication slave.

A battery management system includes monitoring devices arranged in a housing accommodating a battery. The monitoring devices monitor the battery and acquire battery monitoring information. The controller performs wireless communication with each of the monitoring devices via a wireless communication connection. The controller transmits a disconnection instruction to each of the monitoring devices. Each of the monitoring devices periodically executes a requesting operation after disconnection of the wireless communication connection. The controller accepts the requesting operation to establish the wireless communication connection. The controller and each of the monitoring devices perform a periodic communication of the battery monitoring information via the established wireless communication connection. Each of the monitoring devices determines start timing of the requesting operation based on reception timing of the disconnection instruction so that at least some of timings of requesting operations of the monitoring devices do not overlap with each other.

A battery management system includes monitoring devices arranged in a housing accommodating a battery. The monitoring devices monitor the battery and acquire battery monitoring information. The controller performs wireless communication with each of the monitoring devices via a wireless communication connection. The controller transmits a disconnection instruction to each of the monitoring devices. Each of the monitoring devices periodically executes a requesting operation after disconnection of the wireless communication connection. The controller accepts the requesting operation to establish the wireless communication connection. The controller and each of the monitoring devices perform a periodic communication of the battery monitoring information via the established wireless communication connection. Each of the monitoring devices determines start timing of the requesting operation based on reception timing of the disconnection instruction so that at least some of timings of requesting operations of the monitoring devices do not overlap with each other.

A monitoring system includes monitoring devices provided in a monitored device and monitoring the monitored device, and a controller that wirelessly communicates with the monitoring devices to acquire monitoring information of the monitored device from the monitoring devices. The monitored device is switchable between an operating state and a non-operating state. In the non-operating state of the monitored device, the monitoring devices establish communication connections in which at least one of the monitoring devices acts as a communication master and others of the monitoring devices act as communication slaves for the communication master. In the non-operating state of the monitored device, the controller does not act as a communication master for the monitoring devices.

A monitoring system includes monitoring devices provided in a monitored device and monitoring the monitored device, and a controller that wirelessly communicates with the monitoring devices to acquire monitoring information of the monitored device from the monitoring devices. The monitored device is switchable between an operating state and a non-operating state. In the non-operating state of the monitored device, the monitoring devices establish communication connections in which at least one of the monitoring devices acts as a communication master and others of the monitoring devices act as communication slaves for the communication master. In the non-operating state of the monitored device, the controller does not act as a communication master for the monitoring devices.

A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery, monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and execute a predetermined process based on the battery monitoring information. The controller transmits a request for battery monitoring information to the monitoring device. The monitoring device transmits the battery monitoring information to the controller in response to the request. The controller determines whether missing of the battery monitoring information has occurred based on a correlation between the battery monitoring information acquired from the monitoring device via wireless communication and relationship information held by the controller related to the battery monitoring information.

A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery, monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and execute a predetermined process based on the battery monitoring information. The controller transmits a request for battery monitoring information to the monitoring device. The monitoring device transmits the battery monitoring information to the controller in response to the request. The controller determines whether missing of the battery monitoring information has occurred based on a correlation between the battery monitoring information acquired from the monitoring device via wireless communication and relationship information held by the controller related to the battery monitoring information.

A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery. The monitoring device monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and executes a predetermined process based on the battery monitoring information. The monitoring device holds imperfect information that is battery monitoring information indicating failure of data transmission/reception between the monitoring device and the controller. The monitoring device retransmits information corresponding to the imperfect information from next time the battery monitoring information is transmitted.

A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery. The monitoring device monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and executes a predetermined process based on the battery monitoring information. The monitoring device holds imperfect information that is battery monitoring information indicating failure of data transmission/reception between the monitoring device and the controller. The monitoring device retransmits information corresponding to the imperfect information from next time the battery monitoring information is transmitted.