A recovery processing method of a lithium ion battery having a positive electrode and a negative electrode and in which performance has decreased due to a residue of lithium ions in the negative electrode, the method comprises: repeating a cycle a plurality of times, the cycle including: a first process of setting an SOC of the lithium ion battery to a first value, that is equal to or smaller than a value of the SOC in which a gradient of an SOC-voltage curve is a minimum value and that is equal to or greater than the value of the SOC in which the gradient of the SOC-voltage curve is two times the minimum value, by charging; and a second process of setting the SOC of the lithium ion battery to a second value, that is smaller than the first value, by discharging.

A Dielectric Energy Storage System (DESS), a Dielectric Energy Storage System Management System (DESS-MS), and method that stores energy for a wide variety of applications.

A measurement apparatus detects a voltage change in a power storage device. The measurement apparatus supplies constant current to the power storage device; measures voltage related to the power storage device supplied with the constant current; and detects the voltage change in the power storage device subjected to the measurement. The measurement apparatus also acquires the voltage change in the power storage device based on an electrical property serving as a reference of the power storage device.

Embodiments of the systems and methods of direct cell attachment for battery cells disclosed herein operate without the protection FETs and the protection IC, thereby enabling the direct attachment of battery cells to the system without compromising safety. A charger IC comprises a switching regulator whose output is used to charge the battery through a pass device. In example embodiments of the disclosed systems and methods of direct cell attachment, a combination of switching FETs and the pass device are used as a protection device instead of the charge and discharge FETs. During normal operation, the pass device may be used to charge the battery using the traditional battery charging profile. Under fault condition, the switching FETs and pass device may be driven appropriately to protect the system.

The battery system is a combined system of a first battery and a second battery. The discharging curve (discharging characteristic) (311) of the first battery has a stable region (B1). The discharging curve (discharging characteristic) (321) of the second battery has a stable region (B2) in the range of voltage lower than the voltage in the stable region (B1) of the first battery and also has an unstable region (A2) in the range of voltage overlapping the voltage in the stable region (B1) of the first battery. The first battery and the second battery are connected in parallel so that, in a discharging process, the discharging state of the entire battery shifts from the stable region (B1) of the first battery to the stable region (B2) of the second battery.

An adaptive charging protocol (ACP) implemented for fast-charging a rechargeable battery having electrode terminals connected to terminals of a power supply provided to apply time-varying voltages to the electrodes, comprising, before starting a charging operation for the battery, the steps of: detecting the existence of historical data on previous charging operations for the battery; in case of detection, processing the historical data to adjust charging parameters in view of optimizing the charging operation; in absence of detection, electrically testing the battery to get data on variations of the state of charge (SOC) for the battery, in view of building a learning model on the SOC variations to be used for optimizing the charging operation.

In accordance with an embodiment, a bypass charging circuit includes a pair of transistors having current carrying terminals commonly connected to form a node. An input of a comparator is coupled to the node through a switch and to a resistor. Another input terminal of the comparator is coupled for receiving a reference voltage. Optionally, a transistor may be connected to the bypass charging circuit. In accordance with another embodiment a method is provided in which bypass charging transistors are coupled to first input of a comparator in response to closing a switch. A voltage is generated at the first input of the comparator in response to closing the switch and the voltage is compared with a reference voltage. In response to the comparison, a status indicator signal is generated to indicate the presence of a low-impedance failure in one or both of the bypass charging transistors.

Techniques for controlling charging of a battery of a vehicle comprise receiving, from a positive (B+) voltage sensor, a B+ voltage signal indicative of a voltage at a B+ terminal of an alternator of the vehicle, receiving, from an intelligent battery sensor (IBS), an IBS voltage signal indicative of a voltage at a positive terminal of the battery, applying high pass and low pass filters to the B+ voltage signal and the IBS voltage signals, respectively, estimating a voltage of the battery using both the filtered B+ voltage signal and the filtered IBS voltage signal, adjusting a target voltage for the battery based on the estimated battery voltage, and controlling charging of the battery using the adjusted target voltage to mitigate overcharging and undercharging of the battery.

A method and apparatus for waking a battery pack from a dormant mode via shaking. The battery pack has a piezo electric device coupled to a semiconductor control circuit providing a power path between a positive terminal of a battery cell and a boot input of an ASIC charge/discharge controller powered by the battery cell. Shaking of the piezo electric device energizes the semiconductor control circuit, which engages the power path to power the initial booting of the ASIC charge/discharge controller.

Systems, methods and apparatus for wireless charging are disclosed. A charging device has a plurality of charging cells provided on a charging surface, a charging circuit and a controller. The controller may be configured to cause the charging circuit to provide a charging current to a resonant circuit when a receiving device is placed on the charging surface, detect a change or rate of change in voltage or current level associated with the resonant circuit, provide a measurement slot by terminating the charging current for a period of time, and determine that the receiving device has been removed from the charging surface by performing a passive or digital ping procedure during the measurement slot.