A battery management device manages a battery including a plurality of battery cells in which a change in OCV relative to a change in SOC is smaller in a first SOC range than in a second SOC range. The battery management device is configured to: accumulate a current flowing in each battery cell to calculate the SOC of the battery cell; when the calculated SOC has stayed in the first SOC range for a predetermined period or more, control the cell balancing circuits in such a way that the SOC of a target battery cell selected from the battery cell s falls within the second SOC range; and calculate the SOC of the target battery cell based on the relationship between the SOC and the OCV in the second SOC range and correct the SOC of each battery cell by the amount of correction obtained based on the calculated SOC.

Systems and methods are provided for suggesting a charging station for an electric vehicle. A partial range of the electric vehicle corresponding to a predetermined percentage of the current state of charge of a battery of the electric vehicle is determined. A location corresponding to the partial range, along a route to a destination, is determined and used to select a suggested charging station based on the location corresponding to the partial range. The suggested charging station is generated for presentation at a display.

Systems and methods are provided for suggesting a charging station for an electric vehicle. A partial range of the electric vehicle corresponding to a predetermined percentage of the current state of charge of a battery of the electric vehicle is determined. A location corresponding to the partial range, along a route to a destination, is determined and used to select a suggested charging station based on the location corresponding to the partial range. The suggested charging station is generated for presentation at a display.

Methods, apparatus, systems and articles of manufacture are described for a wireless battery system. An example apparatus includes at least one memory, instructions, and processor circuitry to at least one of instantiate or execute the instructions to identify a first battery node to transmit an uplink command during a first superframe interval, transmit a downlink command to the first battery node and a second battery node, the first battery node to switch in the first superframe interval from a receive state to a transmit state in response to the downlink command, the first battery node to transmit the uplink command in the transmit state, and receive the uplink command from the first battery node in the first superframe interval.

Methods, apparatus, systems and articles of manufacture are described for a wireless battery system. An example apparatus includes at least one memory, instructions, and processor circuitry to at least one of instantiate or execute the instructions to identify a first battery node to transmit an uplink command during a first superframe interval, transmit a downlink command to the first battery node and a second battery node, the first battery node to switch in the first superframe interval from a receive state to a transmit state in response to the downlink command, the first battery node to transmit the uplink command in the transmit state, and receive the uplink command from the first battery node in the first superframe interval.

According to one embodiment, a sensor includes an element part, and a control circuit part. The element part includes first and second elements. Each of the first and second elements includes a first magnetic element and a first conductive member. The control circuit part includes a first current circuit, a differential circuit, and a phase detection circuit. The first current circuit is configured to supply a first current to the first conductive member. The differential circuit is configured to output a differential signal corresponding to a difference of a first signal and a second signal. The first signal corresponds to a change in a first electrical resistance of the first magnetic element of the first element, The second signal corresponds to a change in a second electrical resistance of the first magnetic element of the second element. The phase detection circuit is configured to perform a phase detection of the differential signal.

According to one embodiment, a sensor includes an element part, and a control circuit part. The element part includes first and second elements. Each of the first and second elements includes a first magnetic element and a first conductive member. The control circuit part includes a first current circuit, a differential circuit, and a phase detection circuit. The first current circuit is configured to supply a first current to the first conductive member. The differential circuit is configured to output a differential signal corresponding to a difference of a first signal and a second signal. The first signal corresponds to a change in a first electrical resistance of the first magnetic element of the first element, The second signal corresponds to a change in a second electrical resistance of the first magnetic element of the second element. The phase detection circuit is configured to perform a phase detection of the differential signal.

A ground fault detection device compatible with Y capacitors of various capacities without increasing the capacitance of a detection capacitor is provided. The ground fault detection device includes a first detection capacitor that operates as a flying capacitor, a second detection capacitor that operates as a flying capacitor, a control unit measures the charging voltage of the first detection capacitor and the second detection capacitor, a switching unit that switches between a state using a first measurement system in which the first detection capacitor is charged with the high voltage battery and the charging voltage of the first detection capacitor is measured by the control unit, and a state using a second measurement system in which the second detection capacitor is charged with the high voltage battery and the charging voltage of the second detection capacitor is measured by the control unit.

A current measurement device 50 for measuring the current of a power storage element comprises a measurement resistor unit 80 that is positioned on a current path and comprises a resistor 81, a pair of detection points Pa, Pb that are positioned on the current path on both sides of the resistor 81, a current detection unit 160 that comprises a pair of voltage input units 161A, 161B that are connected to the pair of detection points Pa, Pb and detects the current of the power storage element from the voltage difference between the pair of detection points, and a ground connection point Pg that is connected to a common ground GND with the current detection unit 160. The resistance Rga along the current path X to the ground connection point Pg from the detection point Pa from among the pair of detection points Pa, Pb that is closest to the ground connection point Pg is smaller than the value obtained by dividing the input voltage tolerance Vm of the current detection unit 160 by a prescribed current of the power storage element.

A current measurement device 50 for measuring the current of a power storage element comprises a measurement resistor unit 80 that is positioned on a current path and comprises a resistor 81, a pair of detection points Pa, Pb that are positioned on the current path on both sides of the resistor 81, a current detection unit 160 that comprises a pair of voltage input units 161A, 161B that are connected to the pair of detection points Pa, Pb and detects the current of the power storage element from the voltage difference between the pair of detection points, and a ground connection point Pg that is connected to a common ground GND with the current detection unit 160. The resistance Rga along the current path X to the ground connection point Pg from the detection point Pa from among the pair of detection points Pa, Pb that is closest to the ground connection point Pg is smaller than the value obtained by dividing the input voltage tolerance Vm of the current detection unit 160 by a prescribed current of the power storage element.