A battery with a battery management system is capable of charging the battery with recaptured energy from an energy regeneration device. The battery management system charges the battery with the energy regeneration device if the output voltage from the energy regeneration device is larger than the charging voltage of the battery.

Disclosed is an apparatus and method for mining battery characteristic data, which calculates a particle surface concentration (c.sub.se,i) of lithium from a first state space model derived from a Pade approximation equation of a transcendental transfer function, calculates a change ratio

[00001]$\frac{\partial c_{\mathrm{se},i}}{\partial \text{?}}\left(t\right)$$\text{?}\text{indicates text missing or illegible when filed}$

of the particle surface concentration to the change in the active material volume fraction from a second state space model derived by the partial derivative of the Pade approximation equation, calculates a change ratio

[00002]$\frac{\partial {\eta }_i\left(t\right)}{\partial \mathrm{.Math.}\text{?}}$$\text{?}\text{indicates text missing or illegible when filed}$

of over-potential to the change in the active material volume fraction from the Butler-Vollmer equation, calculates a potential slope

[00003]$\frac{\partial U_i}{\partial c_{\mathrm{se},i}}$

corresponding to the particle surface concentration by using an open circuit potential function, and stores voltage-current data in which the sensitivity of the battery voltage to the active material volume fraction of the electrode calculated from

[00004]$\frac{\partial U_i}{\partial c_{\mathrm{se},i}}$

A vehicle power supply system configured to be installed in a vehicle. The vehicle power supply system includes a battery having a rated voltage lower than a first voltage; a capacitor having a rated voltage higher than the first voltage; circuitry configured to discharge electric charge stored in the capacitor; and a controller configured to control the circuitry to charge the battery by discharging the electric charge stored in the capacitor in response to detection of a collision of the vehicle or detection of a process to replace the capacitor.

An aspect of the disclosure includes an uninterruptible power supply (UPS) system comprising a first input configured to receive input AC power, a second input configured to be coupled to an energy storage device having a backup runtime capacity, and a controller. The controller is configured to operate the UPS system to store a plurality of indications each indicating a number of times that the UPS system has regained access to the input AC power within a respective amount of time after the UPS system has stopped providing the output power, analyze the plurality of indications to determine an additional backup runtime capacity for reducing a number of load drops, determine a number of additional energy storage devices that provide the additional backup runtime capacity, and output the determined number of additional energy storage devices to add to attain the additional backup runtime capacity and reduce the load drops.

A power storage control system reduces the operating cost in a power storage system, and comprises a monitoring section and a charge/discharge control section. The monitoring section monitors a prescribed index value that correlates with the degradation degree of a storage battery for each storage battery included in a plurality of power storage systems. The charge/discharge control section controls the period in which the prescribed index value of each storage battery changes to a prescribed value by degradation accompanying charging and discharging of the storage battery, by performing control relating to at least one of the charge amount or the charge/discharge speed in charging and discharging of the storage battery based on the monitoring results of the monitoring section.

In a vehicle power supply system mounted on an electric vehicle, a vehicle controller switches a discharge power limit to a motor during travel of the electric vehicle according to degradation information of a battery module to which a plurality of cells are connected, the degradation information being calculated in advance before the travel of the electric vehicle. For example, the vehicle controller switches a limit of a maximum acceleration and/or maximum speed of the electric vehicle as the switching of the discharge power limit.

Power management techniques are disclosed. For instance, an apparatus may include a bidirectional voltage converter circuit, and a control module that selectively operates the bidirectional voltage converter circuit in a charging mode and a delivery mode. The charging mode converts a voltage provided by an interface (e.g., a USB interface) into a charging voltage employed by an energy storage module (e.g., a rechargeable battery). Conversely, the delivery mode converts a voltage provided by the energy storage module into a voltage employed by the interface. Other embodiments are described and claimed.

A system and method of planning external electric power usage of a vehicle traction battery includes retrieving, remotely from the vehicle, data including a current charge level of a traction battery in the vehicle and an estimated range of the vehicle based on the charge level. Input of planned power usage of the traction battery by a set of devices is input remotely from the vehicle. An estimated change of the current charge level is determined based upon the planned power usage based on the current charge level, the estimated range, and the planned power usage. Based on the estimated change of the current charge level, a revised charge level of the traction battery and a revised estimated range of the vehicle is determined, and the revised charge level of the traction battery and the revised estimated range of the vehicle is output to a user computing device.

In one aspect, an apparatus may include a processor and storage accessible to the processor. The storage may include instructions executable by the processor to determine a current state of charge of a battery and to determine a minimum length of time that a device will be powered by the battery to perform one or more tasks without an intervening connection to an external power source. The instructions may then be executable to dynamically determine, based on the current state of charge and the length of time, a first charge rate at which to charge the battery. The instructions may then be executable to charge the battery at the first charge rate prior to a beginning of the length of time. In various examples, the first charge rate may be faster or slower than a normal charge rate for the battery.

When power feeding from a battery to a load is ended, a welding detection unit detects welding of a power feeding contactor, and when the operation of an GBPS is stopped, the welding detection unit detects the welding of the power feeding contactor after a predetermined time has elapsed from when the operation of the GBPS is stopped.