The present disclosure provides a mobile power supply and a method for supplying power to a peripheral device. The mobile power supply comprises a first peripheral connection port and a second peripheral connection port, a first group of connection-port processing circuits and a second group of connection-port processing circuits, a control circuit, and a power supply circuit. A control strategy determining circuit in each group of connection-port processing circuits determines a voltage adjustment strategy according to power supply status information of a corresponding peripheral connection port. The control circuit then causes a voltage adjusting circuit in the connection-port processing circuit to adjust, according to the voltage adjustment strategy, a voltage output by the power supply circuit, such that the adjusted voltage is used to supply power to a peripheral device coupled, by means of a power supply terminal, to the peripheral connection port.

A bidirectional chopper selectively performs: a charging operation to store DC power received from a DC bus in a power storage device; and a discharging operation to output DC power of the power storage device to the DC bus. An inverter converts the DC power received from the DC bus into AC power and supplies the AC power to a load, and converts regenerative power generated by the load into DC power and outputs the DC power to the DC bus. An SOC reference value is set for the power storage device, the SOC reference value being smaller than an upper limit value of a usable range of the SOC and larger than a lower limit value of the usable range. When an AC power supply is sound, a control device controls the bidirectional chopper such that the SOC of the power storage device reaches the SOC reference value.

A reconfigurable battery system is disclosed. The reconfigurable battery system comprises a reconfigurable battery cell array, a controller, and a bus switch. The battery cell array is configured to operate in a first discharge mode, a second discharge mode, or a charge mode. The battery cell array includes a plurality of battery cells arranged as at least a first column of battery cells between a second battery terminal and a first battery terminal and a switch between each battery cell within the first column of battery cells. The bus switch is in signal communication with the battery cell array at the first battery terminal and is configured to select between electrically connecting the first battery terminal to a normal voltage bus or a high-voltage bus.

A charging management apparatus includes a main relay connected between a positive electrode terminal of a battery pack and a charging terminal of a charging connector, a current regulator connected in parallel to the main relay and including a precharge relay and a resistance regulation circuit connected in series, a battery pack voltage sensor, a battery pack current sensor, and a controller to control the main relay is into an on state and the precharge relay into an off state in response to a first switching condition while the main relay is in the off state, the resistance regulation circuit at a first resistance value and the precharge relay is in the on state, and to control the resistance regulation circuit to a second resistance value, the precharge relay into the on state and the main relay into the off state, in response to a second switching condition.

Embodiments that provide advanced charging of energy source arrangements for energy storage applications are disclosed. The embodiments can be used within energy storage systems having a cascaded arrangement of converter modules. The embodiments can include the application of pulses to an energy source of each module of the system. The pulses can be applied for a duration sufficient to initiate an electrochemical reaction. Feedback based pulse control embodiments are also disclosed.

The present disclosure is directed to charging a battery pack by measuring an electrical impedance value of a battery pack by applying a sinusoidal AC excitation signal to a plurality of battery cells of the battery pack, measuring a total impedance value of the battery pack, obtaining a chemical impedance value of the battery pack based on the electrical impedance value and the total impedance value, and adjusting a charge current applied to the battery pack based on the chemical impedance value of the battery pack.

A method for estimating battery cell capacity may comprise deriving a discharge curve for each battery cell included in a module including a plurality of battery cells; deriving a charge curve for each battery cell included in the module; calculating an additional dischargeable capacity of a second battery cell based on a pattern of the discharge curve of a first battery cell; calculating an additional chargeable capacity of the second battery cell based on the transition of the charge curve of the first battery cell; and calculating a capacity of the second battery cell based on the additional dischargeable capacity and the additional chargeable capacity of the second battery cell.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit, and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on/off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit, and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on/off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.

A charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit and a control circuit. The charging input interface is connected to the inductor, which is connected to the first switch and the second switch. The second switch is configured for electrical connection with an energy storage power supply. The first voltage acquisition circuit is connected to the second switch and configured to detect the first voltage output by the charging system in real time. The control circuit cyclically controls the switch on/off time of the first switch based on the first voltage. During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to conduct and starts cyclic control. The state of the first switch is opposite to that of the second switch.