A system and a method for determining a current and/or forecast state of a vehicle battery of a vehicle. The system includes an acquisition device which repeatedly acquires a respectively current idle state voltage value during at least one idle state of the vehicle when a prespecified idle state condition is met; a data storage device storing at least one voltage threshold value; an adaptation device which adapts the at least one voltage threshold value in the data storage device based on the acquired idle state voltage values; and a computing device that determines the current or forecast state of the vehicle battery based on a comparison of a provided comparison voltage value with at least the at least one adapted voltage threshold value, and issues an output signal that indicates the determined current and/or forecast state of the vehicle battery.

A method detects electrical fault states of a removable battery pack and/or an electrical device, in particular a charging device, a diagnostic device or an electrical consumer, that can be connected to the removable battery pack, using a first monitoring unit integrated in the removable battery pack. The method includes measuring a charging or discharge current using a first current measuring apparatus integrated in the electrical device and transmitting the measured current directly or as a converted voltage value to the first monitoring unit of the removable battery pack, and determining, using the first monitoring unit, based on the charging or discharge current and/or the voltage value calculated therefrom, whether the removable battery pack is operating in a permissible operating range.

A method and device for estimating remaining available energy of a power battery is provided. The method includes: estimating, under current state, maximum available energy of a first cell with minimum State of Charge (SOC), and maximum available energy of a second cell with minimum of maximum available capability in the power battery; estimating remaining available energy of the first cell based on its maximum available energy and SOC, and estimating remaining available energy of the second cell based on its maximum available energy and SOC; and estimating the remaining available energy of the power battery based on the number of cells included in the power battery and the smaller one of the remaining available energy between the first and the second cell.

Systems, methods, and computer media for battery system management and non-linear estimation of battery state of charge are provided herein. Battery data is received for a time period over which a battery system has operated. The battery data represents the actual performance of the battery system over the time period. Sub-periods of charging or discharging can be identified in the time period. For the sub-periods of time, a curve can be fit to the battery data. Using the curves for the battery data for the sub-periods of time, an expected performance of the battery system, over a range of states-of-charge, can be determined. Operating instructions for the battery system can be provided based on the expected performance.

A power management system for a vehicle includes a first battery monitoring module configured to monitor a first state of charge (SOC) of a first battery of the vehicle. The first battery has a first nominal voltage. A second battery monitoring module is configured to monitor a second SOC of a second battery of the vehicle. The second battery has a second nominal voltage that is greater than the first nominal voltage. A control module is configured to, using a direct current (DC) to DC converter, selectively charge the second battery with power from the first battery until the second SOC of the second battery is greater than or equal to a predetermined SOC.

A method for estimating a power limit of a battery pack is disclosed, including: obtaining an actual minimum cell voltage of an electrical core with a minimum voltage in the battery pack; obtaining a static discharge power limit of the battery pack; calculating, based on the actual minimum cell voltage, an estimated discharge voltage of the electrical core with the minimum voltage for use when the battery pack is discharged based on the static discharge power limit; determining whether the estimated discharge voltage falls between a discharge voltage control threshold of the electrical core with the minimum voltage and an undervoltage threshold of the electrical core with the minimum voltage; and determining a target discharge power limit of the battery pack through a discharge interpolation algorithm when the estimated discharge voltage falls between the discharge voltage control threshold and the undervoltage threshold.

In one or more embodiments, one or more systems, one or more methods, and/or one or more processes may determine multiple voltage values associated with a rechargeable battery over a period of time; store the multiple voltage values with respect to multiple clock values over the period of time; determine a voltage drop rate from the multiple voltage values and the multiple clock values; determine a threshold voltage value associated with a predicted energy capacity of the rechargeable battery for a mobile information handling system (IHS) to perform a power state transition; determine a voltage value associated with the rechargeable battery; determine that the voltage value has reached the threshold voltage value; provide a notification to an operating system executed by the mobile IHS; store data from a volatile memory medium to a non-volatile memory medium; and transition the mobile IHS from an operational state to a power conservation state.

A method for assigning swappable battery packs to electric aircraft includes receiving, at a computing system, status information for a plurality of battery packs located at at least one battery swapping location, wherein the status information comprises states of charge and states of health for the plurality of battery packs; determining, by the computing system, energy requirements for a plurality of electric aircraft based at least in part on flight plans for the plurality of electric aircraft; determining, by the computing system, assignments of at least a portion of the plurality of battery packs to the plurality of electric aircraft based at least in part on the states of charge and states of health of the plurality of battery packs and the energy requirements for the plurality of aircraft; and swapping at least one battery pack into at least one aircraft based on the determined assignments.

A deterioration diagnosis apparatus of an assembled battery includes at least one processor. The processor executes discharging of each of a plurality of cells included in an assembled battery mounted on a vehicle while measuring a voltage of each of the cells, and estimates a deterioration degree of the assembled battery using voltage data indicating a transition of a voltage of at least one of the cells from a discharging start voltage to a predetermined discharging end voltage. The vehicle includes an internal combustion engine and a motor that executes start processing of the internal combustion engine. The assembled battery supplies power to the motor. The processor determines, during the discharging, whether the assembled battery becomes unable to supply power required for the start processing to the motor when the discharging is continued, and ends the discharging before the assembled battery becomes unable to supply the power to the motor.

A system for determining an operating mode of a battery includes a voltage sensor configured to detect a present voltage across terminals of the battery. The system further includes a non-transitory memory configured to store previously detected voltages across the terminals of the battery, and a previous operating mode of the battery. The system further includes a processor coupled to the voltage sensor and the non-transitory memory and configured to determine the operating mode of the battery by comparing the present voltage across the terminals of the battery to the previously detected voltages of the battery and based on the previous operating mode of the battery.