A battery information processing system comprises: an acquisition unit configured to acquire battery information including use histories of batteries; a classification unit configured to classify the batteries for each property on the basis of properties of the batteries and store the battery information in a plurality of databases classified for each property; a selection unit configured to select a database including high priority battery information from the plurality of classified databases; a determination unit configured to determine the selected database as a database for selecting a combination of a plurality of batteries in a case in which a property of an assembled battery calculated by combining a plurality of batteries satisfies a criterion; and a presentation unit configured to present combination information of the plurality of batteries selected in a descending order from the highest coincidence.

A method for detecting a fault state of at least one battery cell of a battery having multiple battery cells. A cell voltage of a respective battery cell of the multiple battery cells is registered at a measurement time and a comparison value is determined as a function of at least one of the cell voltages and is compared to a provided first reference value. The fault state is detected as a function of a result of the comparison. A scatter value is determined, which represents a scatter of at least part of the cell voltages registered at the specific measurement time, and the fault state is determined as a function of the scatter value.

A modular battery system provides propulsive power to the rotor system of an aircraft. The modular battery system includes an array of battery modules arranged in at least one stack. Each battery module includes a plurality of battery cells, a first side having positive and negative receptacles and a second side, that is opposite of the first side, having positive and negative plugs. The receptacles and plugs are configured such that adjacent battery modules in a side-by-side relationship are electrically coupled together via plug and receptacle connections and such that the battery modules are electrically coupled together in parallel. An interconnection electrically couples each stack of battery modules together via plug and receptacle connections with one of the battery modules in each stack such that the stacks of battery modules are electrically coupled together in parallel.

In a power supply system, a plurality of voltage converters have chargeable/dischargeable batteries connected to the respective primary sides and have respective secondary sides connected in parallel to each other. For each of the voltage converters, a voltage transformation rate is set such that the current measured by a primary side current measuring instrument is maintained within a first range between the discharge current maximum value of the batteries connected to the primary sides and the charge current maximum value of the batteries.

A system for assessment of a battery cell comprises a testing platform, a conveying system, one or more ultrasound sources, and one or more ultrasound sources, and a control unit. The conveying system can move the battery cell to the testing platform for assessment and from the testing platform after the assessment. The control unit can control the one or more ultrasound sources and the one or more ultrasound sensors to perform the assessment. The assessment can comprise determining a state of the battery cell based on the one or more signals generated by the one or more ultrasound sensors. The control unit can control the conveying system to direct the battery cell from the testing platform responsive to the assessment.

A system for assessment of a battery cell comprises a testing platform, a conveying system, one or more ultrasound sources, and one or more ultrasound sources, and a control unit. The conveying system can move the battery cell to the testing platform for assessment and from the testing platform after the assessment. The control unit can control the one or more ultrasound sources and the one or more ultrasound sensors to perform the assessment. The assessment can comprise determining a state of the battery cell based on the one or more signals generated by the one or more ultrasound sensors. The control unit can control the conveying system to direct the battery cell from the testing platform responsive to the assessment.

A battery management device that manages a battery includes: multiple voltage detection circuits each connected to a corresponding one of a plurality of battery cells; and multiple discharge circuits each connected to a corresponding one of the battery cells. The battery management device causes the battery cell whose voltage difference from a reference voltage is equal to or greater than a predetermined first threshold and less than a second threshold that is greater than the first threshold to be discharged while a system of the vehicle is stopped, and causes the battery cell whose voltage difference is equal to or greater than the second threshold to be discharged at least either while the system is stopped or while the system is in operation.

A battery management device that manages a battery includes: multiple voltage detection circuits each connected to a corresponding one of a plurality of battery cells; and multiple discharge circuits each connected to a corresponding one of the battery cells. The battery management device causes the battery cell whose voltage difference from a reference voltage is equal to or greater than a predetermined first threshold and less than a second threshold that is greater than the first threshold to be discharged while a system of the vehicle is stopped, and causes the battery cell whose voltage difference is equal to or greater than the second threshold to be discharged at least either while the system is stopped or while the system is in operation.

In a management device that manages a parallel system for power storage where a plurality of series-connected cell groups are connected in parallel, controller (16) derives deviations of currents flowing through the plurality of series-connected cell groups, and calculates an upper limit value of a charging current or charging power of the whole parallel system or an upper limit value of a discharging current or discharging power of the whole parallel system based on the derived current deviations. Controller (16) adjusts the upper limit value by multiplying the upper limit value by a coefficient α (0≤α≤1) in accordance with a condition at a time of deriving the current deviations.

An information processing method includes: acquiring a weight of an electric mobile body; acquiring an amount of power consumption of the mobile body for each of numbers of one or more batteries mounted on the mobile body, the amount of power consumption being calculated based on the number of batteries; calculating a degradation cost of batteries for each of the numbers of the one or more batteries, the degradation cost being calculated based on the amount of power consumption and on the number of batteries; calculating a charging cost for each of the numbers of the one or more batteries, the charging cost being calculated based on the weight; and determining a number of batteries to be actually mounted on the mobile body, in accordance with the degradation cost and the charging cost, and outputting the number of batteries to be mounted.