An implantable medical device (IMD) is configured to provide stimulation therapy to a patient. The IMD includes a rechargeable battery, pulse generating circuitry powered by the rechargeable battery and an inductive coupling element including at least one inductor operative to accept radio frequency (RF) power from an external charger and generate a charging voltage. A temperature sensor is configured to measure a temperature of at least a part of the IMD and output measured temperature data. A waveform generating circuit for converting measured temperature data to a waveform signal for controlling a recharging current for the rechargeable battery. The inductive coupling element is configured to communicate the waveform signal to the external charger.

In an embodiment a circuit includes drive circuitry configured to be coupled to a control terminal of an electronic switch and configured to apply a discharge signal to the control terminal causing the electronic switch to become conductive and provide an electrical discharge path for an energized element, a sensing node configured to be coupled to the control terminal and configured to sense a voltage at the control terminal and a feedback network coupled between the sensing node and the drive circuitry, wherein the feedback network includes a comparator circuit coupled to the sensing node and configured to compare the voltage at the control terminal and sensed at the sensing node with a reference threshold and to provide a comparison signal having a first value and a second value, respectively, in response to the voltage at the control terminal being higher or lower than the reference threshold, and wherein the drive circuitry is configured to produce the discharge signal as a function of the comparison signal.

A pulse charging for a battery includes multi-stage voltage conversion. At first stage, an input voltage from a power supply is divided into a plurality of intermediate voltages. At second stage, one or more of the plurality of intermediate voltage are further down converted to generate one or more portions of a charging pulse to be applied to the battery. The down conversion of the input voltage to the output voltage is accompanied by increase in charging current that is applied to the battery. The higher charging current applied to the battery results in fast charging of the battery. Also, the described multi-stage voltage conversion circuitry has high efficiency which alleviates problem of heat dissipation associated with the voltage conversion for charging of the battery.

Disclosed is an operating method for a wirelessly communicating electronic device, including the following steps: a) acquisition of a radio-frequency frame representative of at least one data item intended to be transmitted by the radio-frequency transmitter in a radio-frequency message; b) determination of the amount of power available in the power storage; c) determination of the length of the radio-frequency message to be transmitted; d) determination of transmission parameters of the radio-frequency transmitter, according to the values determined for the length of the message and the amount of power available in the power storage; e) and transmission of the message by the transmitter, using the determined transmission parameters.

A battery diagnosis apparatus determines whether a battery may be reused and includes a data obtaining device configured to output a perturbation signal, a signal regulating device configured to generate a current by applying the perturbation signal to a battery and performing feedback of a current signal output from the battery, and a noise canceling device configured to cancel noises of the current signal and a voltage signal received from the battery. The data obtaining device outputs the perturbation signal while changing a frequency, obtains an impedance spectrum based on the noise-canceled current signal and voltage signal for each frequency, and determines whether to reuse the battery based on the obtained impedance spectrum.

A method of charging a lithium-ion battery. It is assumed that the battery has a cooling system. A desired temperature profile for the battery during charging is determined. The charge current is pulse width modulated (PWM), as is the activation of the cooling system. During charging, various parameters of either or both of the PWM signals are adjusted such that the desired temperature profile is maintained.

A Battery Management System (BMS) inspects a battery pack using AC impedance. A controller on the BMS drives a Pulse-Width Modulation (PWM) output signal to an on-board excitation regulator such as a synchronous buck converter that modulates a limited energy unit such as a capacitor with a swept frequency of a PWM input signal. The capacitor modulations are applied to a terminal of the battery pack as an AC excitation signal. Synchronous sampling of the battery pack provides responses to the AC excitation signal. An AC excitation signal current and a battery response voltage are processed and Fourier-transformed to generate a Nyquist plot of the excitation-response data. Curve shifts can indicate worn battery cells. The capacitor generating the AC excitation signal draws little energy from the battery pack so AC impedance inspection can occur during all modes: charging, discharging, and idle modes without an external power supply.

The present invention relates to a method for charging an electrochemical cell of a rechargeable battery with charging pulse control (PL), the pulses (PL) being driven in voltage control mode in the form of voltage steps (Pt) of variable amplitude. According to the invention, the method consists in calculating the value (Ut+1) of each voltage step (Pt+1) with respect to the value (Ut) of the preceding voltage step (Pt) and according to a progression variable representative of the variation in the internal resistance of the cell (d(R)/dt), for a period ending on the preceding step (Pt), with respect to a predetermined tolerated variation threshold (α), where Var=d(R)/dt−α. The method applies to high-voltage electric battery charging protocols for electromobility or stationary applications, or portable device batteries, for example.

A battery management system and a battery management method are provided. The battery management system includes a temperature sampling circuit, a plurality of voltage measurement circuits, a current sampling circuit, and a microcontroller. The temperature sampling circuit is configured to obtain a temperature parameter of a plurality of battery packs. The voltage measurement circuits are configured to obtain a plurality of open circuit voltage parameters of the battery packs. The current sampling circuit is configured to obtain a current parameter of the battery packs. The microcontroller obtains a plurality of initial state-of-charge parameters of the battery packs according to the open circuit voltage parameters and the temperature parameter and respectively calculates a plurality of present battery powers of the battery packs according to the initial state-of-charge parameters, the temperature parameter, and the current parameter.

A terminal and a device are provided. The terminal includes a charging interface and a first charging circuit. The first charging circuit is coupled with the charging interface, and is configured to receive an output voltage from the adapter via the charging interface and apply the output voltage to both ends of multiple cells connected in series in the terminal to charge the multiple cells.