An uninterruptible power apparatus with a function of forced disconnection path is coupled between a grid and a load, and the uninterruptible power apparatus includes a bypass path, a power conversion module, a current detection unit, and a control module. The bypass path includes a switch unit, and the power conversion module is connected in parallel to the bypass path. The current detection unit detects a current flowing through the bypass path and transmits a current signal to the control module. The control module provides a turned-off signal to the switch unit when a first voltage of the grid is abnormal, and transmits a polarity of the current signal. The power conversion module generates a compensation amount according to the polarity, and generates an output voltage command according to the compensation amount and a voltage at an input terminal or an output terminal of the power conversion module.

A backup power supply device is provided with: first to fifth battery packs connected in parallel; a charger that supplies a charge current to each battery pack; first to fifth charge switches that individually connect and disconnect charge paths of the respective battery packs; and a controller that controls each charge switch. The controller divides the battery packs into a plurality of groups and performs pulse-width modulation (PWM) control of each charge switch at a duty ratio corresponding to the number of batteries in each group to charge the battery packs for each group.

A method is provided for impedance-controlled fast charging of a stored electrical energy source of a working device, in particular of a stored energy source in a vehicle. In the method: a variable characteristic of an impedance of the stored energy source is detected; a present charging current for charging the stored electrical energy source is set as a function of the variable characteristic of the impedance; the present charging current is temporarily reduced with a steep edge by temporarily connecting a resistive load to the stored energy source and feeding the load using the stored energy source; and a voltage response of the stored energy source to the steep edge is detected as the variable characteristic of the impedance of the stored energy source and is used as the basis for setting the present charging current.

A vehicle-mounted device for detecting battery state comprises a controller, a load unit, and a switch unit. The load unit is coupled to the battery, the switch unit is coupled between the battery and the load unit. The controller can control the switch unit to disconnect or connect the battery and the load unit at a predefined frequency. The controller can switch the load unit to generate ripple voltage on the battery, and measure the ripple voltage of each battery cell, an abnormal state of a battery can be determined according to the ripple voltage of each battery cell.

A battery management system, may include an input configured to couple to a power supply, an output configured to couple to a battery, and battery management circuitry coupled between the power supply and the battery and configured to deliver electrical energy to the output at a significantly higher peak-to-average power ratio than receipt of electrical energy to the input.

A high-power DC charger system and method to charge a battery or electric vehicle are disclosed. The system can include a high-power rectifier with a plurality of Gallium Nitride (GaN) switches and a plurality of silicon carbide (SiC) rectifying diodes. The rectifier can be configured to receive AC input and output DC voltage and a converter configured to convert the voltage from the rectifier into a DC voltage that meets the charging needs of a battery.

A charging control method, an energy storage module, and a powered device. The method includes: obtaining a sampling voltage of an input port of a DC-DC unit; determining a charging parameter of the DC-DC unit for an energy storage unit based on the sampling voltage of the input port of the DC-DC unit and a preset constant voltage of the input port of the DC-DC unit, where a sum of a charging electricity quantity reflected by the charging parameter and a charging electricity quantity of a load is equal to a maximum output electricity quantity of an input source; and after the charging parameter is determined, charging the energy storage unit by using the charging electricity quantity reflected by the charging parameter.

A switching unit is included, which is arranged between a first electric storage unit of a first electric storage device configured to be connectable in parallel with a second electric storage device and a wire electrically connecting the first electric storage device and the second electric storage device, and which is configured to switch a electrical connection relationship of the wire and the first electric storage unit. A restricting unit is included, which is connected in parallel with the switching unit between the wire and the first electric storage unit, has a higher resistance than the switching unit, and is configured to cause a current to flow in the direction from the wire to the first electric storage unit and suppress current flowing in the direction from the first electric storage unit to the wire.

A system and method for prolonging a life of a battery is provided. The system may include a charge storage device and a battery. The charge storage device may be connected to the battery. The system may further include a controller connected to the charge storage device. The controller may compute a resonance frequency. The controller may further control the charge storage device to supply, to the battery, a specific voltage at a specific time defined by the resonance frequency, while the battery is under a load. Furthermore, the controller may control the charge storage device to charge while the battery is discharging and discharge while the battery is charging, for prolonging the life of the battery.

Disclosed are a jumper cable, a starting power supply and a jump start device. The jumper cable includes first and second input terminals respectively configured to be connected with positive and negative electrodes of a starting power supply; first and second clamps respectively configured to be clamped to positive and negative electrodes of a vehicle battery; the second input terminal and the second clamp are electrically connected; a switching device, wherein the first input terminal and the first clamp are electrically connected through the switching device; and a non-MCU controlling circuit electrically connected with a controlling terminal of the switching device, configured to control the switching device to be switched on when the clamps are properly connected to the electrodes of the vehicle battery, and configured to not control the switching device to be switched on when the clamps are reversely connected to the electrodes of the vehicle battery.