A battery data management system includes a communication device for obtaining state data of a battery from a battery management system and transmitting the state data of the battery to an outside and a management server for managing the state data of the battery, received from the communication device through a first network.

A secondary battery management device is connected with electronic equipment using a secondary battery as a driving power supply via the Internet. The secondary battery management device acquires performance information of the secondary battery from the electronic equipment, and measures a degradation level of performance of the secondary battery during a predetermined unit period. The secondary battery management device estimates a degrading speed of the secondary battery on the basis of the degradation level. The secondary battery management device may notify a user of the electronic equipment of the replacement timing of the secondary battery, use fees of the secondary battery, and the like.

A secondary battery management device is connected with electronic equipment using a secondary battery as a driving power supply via the Internet. The secondary battery management device acquires performance information of the secondary battery from the electronic equipment, and measures a degradation level of performance of the secondary battery during a predetermined unit period. The secondary battery management device estimates a degrading speed of the secondary battery on the basis of the degradation level. The secondary battery management device may notify a user of the electronic equipment of the replacement timing of the secondary battery, use fees of the secondary battery, and the like.

A semiconductor device capable of monitoring the state of a battery or the like is provided. The states of a plurality of batteries in a battery module is easily acquired. The semiconductor device that can be attached to an electrode of a battery or the like includes a first substrate, an element layer, and first to third conductive layers. The element layer includes a first circuit and a second circuit and is provided on a side of a first surface of the first substrate. The first conductive layer and the second conductive layer are provided on a side of a second surface positioned opposite to the first surface of the first substrate. The first circuit is electrically connected to each of the first conductive layer and the second conductive layer through an opening provided in the first substrate. The third conductive layer is provided to be stacked on a side opposite to the first substrate side of the element layer and electrically connected to the second circuit. The first conductive layer and the second conductive layer each function as a terminal, and the third conductive layer functions as an antenna.

A semiconductor device capable of monitoring the state of a battery or the like is provided. The states of a plurality of batteries in a battery module is easily acquired. The semiconductor device that can be attached to an electrode of a battery or the like includes a first substrate, an element layer, and first to third conductive layers. The element layer includes a first circuit and a second circuit and is provided on a side of a first surface of the first substrate. The first conductive layer and the second conductive layer are provided on a side of a second surface positioned opposite to the first surface of the first substrate. The first circuit is electrically connected to each of the first conductive layer and the second conductive layer through an opening provided in the first substrate. The third conductive layer is provided to be stacked on a side opposite to the first substrate side of the element layer and electrically connected to the second circuit. The first conductive layer and the second conductive layer each function as a terminal, and the third conductive layer functions as an antenna.

A voltage sensor includes a drive-sense circuit (DSC) and a reference load. The DSC is operably coupled to a point along a wire that is proximate to a battery terminal. The wire connects the battery terminal to a load. The DSC is configured to generate a signal based on a reference signal that is reference signal is based on an estimate of a voltage at the point along the wire. The DSC is also configured to generate an output signal that corresponds to a difference between the signal and the reference signal and to tune the reference signal until the signal compares favorably to the voltage at the point along the wire. The DSC also is configured to determine the voltage at the point along the wire based on the tuned reference signal. The reference load is operably coupled to the DSC and the point along a wire.

A capacitively coupled data link for a battery is disclosed. The battery comprises a battery cell and a battery management system. The battery is disposed in a battery case. The data li communicates data between the battery management system and a data terminal disposed outside of the battery case. The data link comprises an interior date link portion coupled to the battery management system. The interior data link portion comprises an interior electrode disposed on an inside surface of the battery case and an interior transceiver disposed inside of the battery case coupled to the interior electrode. The data link further comprises an exterior data link portion coupled to data terminal. The exterior data link portion comprises an exterior electrode disposed o outside surface of the battery case opposite the interior electrode, and an exterior transceiver disposed outside of the battery case coupled to the exterior electrode. The interior electrode, the exterior electrode and the battery case disposed therebetween form a capacitive communication link between the interior data link portion and the exterior data link portion.

A capacitively coupled data link for a battery is disclosed. The battery comprises a battery cell and a battery management system. The battery is disposed in a battery case. The data li communicates data between the battery management system and a data terminal disposed outside of the battery case. The data link comprises an interior date link portion coupled to the battery management system. The interior data link portion comprises an interior electrode disposed on an inside surface of the battery case and an interior transceiver disposed inside of the battery case coupled to the interior electrode. The data link further comprises an exterior data link portion coupled to data terminal. The exterior data link portion comprises an exterior electrode disposed o outside surface of the battery case opposite the interior electrode, and an exterior transceiver disposed outside of the battery case coupled to the exterior electrode. The interior electrode, the exterior electrode and the battery case disposed therebetween form a capacitive communication link between the interior data link portion and the exterior data link portion.

Systems and methods for providing notifications regarding battery pack charging status. One charging system includes a battery charger and an external device. The battery charger includes a housing, a battery pack interface, a wireless communication controller, and a charger controller. The charger controller receives status information associated with power tool battery packs and transmits the status information to an external device. The external device includes a display and an external device controller. The external device controller receives the status information from the charger controller and controls the display to display the status information via a user interface.

A battery pack diagnosing device mediating signal communication between a battery pack and a user terminal includes a controller generating a wake-up signal based on a user input to a third switch and transmitting the generated wake-up signal to the battery pack, and establishing a communication connection according to a first communication method with the battery pack turned on based on the wake-up signal and receiving state information of the battery pack through the established communication connection.