The invention relates to a battery cell unit (10) which comprises a rechargeable electrochemical battery cell (11), a monitoring-and-control unit (12) connected in parallel to said battery cell (11), and a coupling unit in the form of a half bridge (14) comprising a first power semi-conductor (15) and a second power semi-conductor (16). Said battery cell unit (10) is equipped with an integrated circuit (20) that has a noise source (21). A switch-on delay can be achieved by means of said noise source (21). The invention also relates to a switching method for a battery system which comprises a plurality of intrinsically-safe battery cell units (10).

A battery and an electronic device are provided. The battery includes a battery cell, including at least one anode of the battery cell and at least one cathode of the battery cell. The battery also includes a voltage detection circuit, wherein the voltage detection circuit detects a voltage of the battery cell. Further, the battery includes a protection circuit, wherein the protection circuit protects the battery cell based on the voltage of the battery cell detected by the voltage detection circuit.

A system and method to identify whether a removable battery pack inserted into a battery-powered device is an authorized battery pack for the device. Battery-powered devices may include a battery-powered drill, saw, flashlight or other type of device. The battery-powered device may send an authentication query to the battery pack. If the battery-powered device does not receive a valid reply from the battery pack, the battery-powered device may verify that the battery-powered device is still within a phase-out period that allows the battery-powered device to use a battery pack with an invalid authentication. If the phase-out period has expired, the battery-powered device may disable the use of the battery pack with an invalid authentication. If the phase-out period is still running, the battery-powered device may allow the use of the battery pack with an invalid authentication, but only for a limited number of battery pack recharge cycles.

A secondary battery protection circuit includes a first terminal connected to a power supply path between a secondary battery and a MOS transistor, a second terminal connected to the power supply path between a load and the MOS transistor, a third terminal connected to a gate of the MOS transistor, a fourth terminal connected to a back gate of the MOS transistor, a control circuit that outputs a switch control signal based on a detected abnormal state of the secondary battery, and a switch control circuit including a first switch for connecting the fourth terminal with the first terminal and a second switch for connecting the fourth terminal with the second terminal. At least one of the resistance between the fourth terminal and the first terminal and the resistance between the fourth terminal and the second terminal is greater than the on resistance value of the MOS transistor.

Multi-cell battery packs can be made safer with certain features that mitigate the consequences of cell failure. Parameters of a cell are monitored to determine when the cell should be disconnected from the pack in case of a fault. The battery is reconfigured to continue operating in a safer mode. An over-charging prevention system reduces the maximum voltage that remaining battery pack can be charged to, so that the cells do not overcharge. Additional circuitry allows the disconnected cell to be periodically reconnected to the battery pack to determine if its conditions have sufficiently improved. The cells also include components for self-powering these cell functions while it is disconnected from the rest of the circuit.

The present disclosure relates to the technical field of charging. A terminal and a battery charging control device and method are provided. The battery charging control device including a battery connector, a main control circuit and a quick charging switch circuit is adopted. During the regular charging or the quick charging, the main control circuit performs a data communication with the external power adapter via the communication interface, and obtains a charging voltage and a charging current for the battery; if the charging voltage is greater than a voltage threshold and/or the charging current is greater than a current threshold, the main control circuit sends a charging switch-off instruction, such that the controller controls the communication interface to switch off; if the charging voltage is less than or equal to the voltage threshold and the charging current is less than or equal to the current threshold, the main control circuit continues to obtain the charging voltage and the charging current.

In a method for operating an electric vehicle and an electric vehicle, including an electric traction drive device for driving vehicle, a control device for controlling the driving, a first energy storage device, for supplying the control device using a first DC voltage, a second energy storage device, for supplying the traction drive device using a second DC voltage, and an energy supply unit for providing an output DC voltage, the first energy storage device is connected to the second energy storage device via a converter device, the first energy storage device is connected to the energy supply unit, the converter device converts the first DC voltage into the second DC voltage, and a power flow from the second energy storage device to the first energy storage device is prevented.

A battery unit includes a power source; a detection part for detecting an output voltage of the power source; a connection part to which a load for atomizing an aerosol source or heating a flavor source and a charger for charging the power source are connectable; and a control part being able to execute a power supplying mode that allows supply of electric power from the power source to the load and a charging mode that allows charging of the power source by the charger, wherein if a decreased quantity of the output voltage per predetermined period in the charging mode is equal to or less than a threshold value that has been set based on a decreased quantity of the output voltage per the predetermined period in the power supplying mode, the control part determines that there is abnormality in the charging mode.

A nitride-based bidirectional switching device is provided for working with a battery protection controller having a power input terminal, a discharge over-current protection (DO) terminal, a charge over-current protection (CO) terminal, a voltage monitoring (VM) terminal and a ground terminal. The nitride-based bidirectional switching device comprises a nitride-based bidirectional switching element and an adaption module configured for receiving a DO signal and a CO signal from the battery protection controller and generating a main control signal for controlling the bidirectional switching element. By implementing the adaption circuit, the nitride-based bidirectional switching element can work with conventional battery protection controller for battery charging and discharging management. Therefore, a nitride-based battery management system can be realized with higher operation frequency as well as a more compact size.

This application provides a battery charging control method and device. Voltages of N cell units in an M.sup.th sampling period are obtained, and a voltage of the battery at each sampling moment among K sampling moments in said sampling period is calculated. Charging of the battery is stopped when the voltage of the battery increases monotonically in the M.sup.th sampling period and a trend of a fitting curve of the voltage of at least one cell unit among the N cell units in said sampling period is not rising.