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 selectively apply power to a heater of the second battery based on an estimated value of the second SOC of the second battery at a next startup of an engine.

According to the present invention, a state management unit measures or estimates the AC resistance value of a secondary cell at a plurality of time points, estimates a predicted transition of the AC resistance value of the secondary cell on the basis of the AC resistance value at the plurality of time points, and estimates a remaining use period until the AC resistance value of the secondary cell reaches a resistance threshold value corresponding to a time point at which usage of the secondary cell ends. When the remaining use period of the secondary cell becomes shorter than a prescribed period, an operation management unit changes the usage manner of the secondary cell method to a usage manner that has a smaller load on the secondary cell, or stops the usage of the secondary cell.

Provided is a vehicle control device that prevents a specific function of a traveling vehicle from being not able to operate due to a failure of a battery. The vehicle control device includes: a control section configured to execute predetermined function control for a vehicle system; a discharge performance determination section configured to determine whether or not a battery is able to discharge a predetermined amount of current in accordance with a predetermined function before the predetermined function control is started; and an execution availability determination section configured to permit the control section to execute the predetermined function when it is determined that the predetermined amount of current is able to be discharged and inhibit the control section from executing the predetermined function when it is determined that the predetermined amount of current is not able to be discharged.

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.

A vehicle battery controller includes a sensor configured to acquire information on a subordinate battery configured to back up a main battery during autonomous driving, a DDC provided between the main battery and the subordinate battery, a switching circuit configured to switch a connection state of the subordinate battery between a connection state for manual driving and a connection state for the autonomous driving, and an electronic control unit configured to control charging and discharging of the subordinate battery by controlling the DDC and the switching circuit based on the information acquired by the sensor. The electronic control unit permits the autonomous driving when determination is made, through first battery control, that the subordinate battery can output backup power. The electronic control unit determines whether the subordinate battery can output the backup power by executing second battery control having higher accuracy than that of the first battery control.

A power supply system with UPS, PCS and circuit diagnosis capabilities is disclosed, including: a DC-bus connected to a voltage/current (V/I) meter, a battery energy storage system (ESS) container, a power conditioning system (PCS), at least one current translation unit, and an energy management controller (EMC), wherein, the V/I meter is used to monitor the voltage and current of the DC-bus, and the PCS performs bi-directional conversion between the DC current from the DC-bus and the AC power from an external distribution panel, the current translation unit translate the DC current from the DC-bus into a voltage suitable for at least a critical load, and the EMC controls the operation of the V/I meter, the battery ESS container, the PCS, and the at least one current translation unit, respectively.

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.

The invention concerns a motor vehicle battery wear monitoring system (1,1A,1B) that includes an acquisition device (11) and a processing device/system (12,12A,12B). The acquisition device (11) is: installed onboard a motor vehicle (2) that is equipped with an internal combustion engine, a battery for providing a battery voltage (V.sub.B), an alternator, and a starter motor for starting up the internal combustion engine; and configured to receive the battery voltage (V.sub.B) and to output quantities indicative of said battery voltage (V.sub.B). The processing device/system (12,12A,12B) is: configured to receive the quantities indicative of the battery voltage (V.sub.B) from the acquisition device (11); and programmed to perform a battery voltage monitoring based on the quantities indicative of the battery voltage (V.sub.B) to detect an approaching battery failure. The battery voltage monitoring includes detecting for each start-up of the internal combustion engine: a respective first voltage value (V.sub.MIN) that is a minimum value assumed by the battery voltage (VB) just after the starter motor has started operating to start up the internal combustion engine; and a respective second voltage value (V.sub.2) assumed by the battery voltage (V.sub.B) just after the internal combustion engine has been started up, the starter motor has stopped operating and the alternator has started operating. The battery voltage monitoring further includes for each start-up of the internal combustion engine: computing a respective voltage rise value (ΔV.sub.R) indicative of a difference between the respective first (V.sub.MIN) and second (V.sub.2) voltage values; and detecting an approaching battery failure if the respective voltage rise value (ΔV.sub.R) meets a predefined condition with respect to a predefined voltage rise threshold (T.sub.ΔVR).

Described herein are system for evaluating operation of a battery by utilizing battery operating data for the battery and utilizing battery operating data for a plurality of other batteries. A system for evaluating operation of a first battery based on measured temperature and voltage monitored in the first battery and in a plurality of other batteries, the system comprising: a battery monitor circuit and a remote device in communicative connection with the battery monitor circuit, wherein the battery monitor circuit wirelessly transmits temperature and voltage information for the first battery to the remote device, wherein the remote device receives temperature and voltage information associated with a plurality of other batteries, and the remote device is configured to evaluate a condition of the first battery as a function of both: (i) the temperature and voltage information of the first battery and (ii) the temperature and voltage information of the plurality of other batteries.

A system identification method executed by a system identification device that estimates a response of a system having a current flowing in a battery as input and an overvoltage of the battery as output, comprises: a first step of identifying the system by applying a model of the battery including a FIR model and an ARX model to the system, based on time series data of each of the current flowing in the battery and the overvoltage of the battery in a predetermined period; and a second step of estimating, based on the model of the battery, the overvoltage of the battery output from the system at an estimation target time after an input start time in the case where no current is input before the input start time and the current is input to the system from the input start time onwards.