A battery pack, a vehicle and an energy storage device. The battery pack includes at least one battery sequence. The battery sequence includes a plurality of batteries. At least one of the batteries includes a casing and a core packaged in the casing. A gap exists between two neighboring batteries. A ratio of the gap to the thickness of the battery is c, and c satisfies the following relational expression: (a−b)<c<(a×t), where a represents an expansion rate of the battery; b represents a compression rate of the core; and t represents a ratio in percentage of a thickness of the battery after effective compression to a thickness of the battery before compression.

An energy conversion device is provided. The device includes: a reversible pulse width modulation (PWM) rectifier (11) and a motor coil (12), where the motor coil (12) includes at least a first winding unit and a second winding unit, and the first winding unit and the second winding unit are both connected with the reversible PWM rectifier (11). The first winding unit is connected with at least one of neutral lines in the second winding unit, where at least one neutral line of at least one of the winding units is connected with a first end of a first direct current (DC) charging and discharging port (3), the reversible PWM rectifier (11) is connected with a first end of a external battery (2) and a second end of the external battery (2) respectively, and a second end of the first DC charging and discharging port (3) is connected with the second end of the external battery (2).

A charging system which charges a power storage device mounted on a moving object, includes: an electric power conversion device that converts electric power supplied from a commercial power supply; a kinetic energy storage device that stores kinetic energy; and a rotary electric machine that is electrically connected to the electric power conversion device and is mechanically connected to the kinetic energy storage device.

The disclosure provides a method, system and device for controlling power sharing of a cluster of charging piles, comprising calculating a remaining power of the cluster at a current time according a total power upper limit of the cluster at the current time, a total number of charging piles of the cluster at the current time and an actual output power of each charging pile; calculating a weight of each charging pile for distributing the remaining power according to performance state of each charging pile; and obtaining a power output upper limit distributed to each charging pile at the next time according to the remaining power at the current time, the weight and the actual output power of each charging pile. The disclosure automatically adjusts the power output upper limit distributed to each charging pile in real time, thereby improving equipment utilization and load utilization of the charging station.

A charging connector includes a housing and a cover. The housing includes a normal fitting part and a quick fitting part. The normal fitting part has a normal frontage to which a normal charging connector is finable. The quick fitting part has a quick frontage to which a quick charging connector is finable. The cover is configured to close the quick frontage. The quick fitting part has a terminal insertion hole through which a terminal of the quick charging connector is insertable inside the quick fitting part. The cover has a first protrusion extending toward the terminal insertion hole and holding the cover on the housing with the first protrusion being inserted into the terminal insertion hole.

A vehicle includes a battery, a motor supplied with an input voltage, an inverter configured to boost the input voltage supplied to the motor to output to the battery, a voltage measuring device configured to measure the input voltage, a switching device connected to a neutral point of the motor, and a controller that determines whether fusion of the switching device occurs, repeats on/off of the switching device based on the determination result, measures a first voltage applied to the voltage measuring device, measures a second voltage applied to the voltage measuring device after discharging the voltage measuring device, compares the first voltage with the second voltage, and charges the battery when the fusion of the switching device is released based on the comparison result.

A vehicle charging circuit includes an AC voltage connection that has a plurality of potentials, a switch device, a plurality of rectifiers that are each in the form of a bridge rectifier, a plurality of step-up converters, and a plurality of galvanically isolating DC-DC converters. Inputs of the rectifiers are connected to one other. The interconnected inputs of the rectifiers are connected to the AC voltage connection via the switch device. The rectifiers each have an output, downstream of each of which is connected one of the step-up converters. The step-up converters are connected to a rechargeable battery connection of the vehicle charging circuit.

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 high-voltage charging system includes: an inverter connected to a rechargeable battery; a motor connected to the inverter and configured to supply power, which is provided to a neutral point of the motor, to the inverter; a first relay having one end connected to the charging power input terminal and an opposite end; a neutral point capacitor arranged on a by-pass path, wherein a first end of the by-pass path is connected to the neutral point and a charging power input terminal to which DC charging power is adapted to input, and a second end of the by-pass path is connected to the rechargeable battery and the opposite end of the opposite end of the first relay; characterized in that the charging system further comprises a second relay, wherein the in series second relay arranged in the by-pass path and with the neutral point capacitor.

The invention relates to a charging station for charging electric vehicles which comprises an electric charging cable and a spring element. The spring element is secured at one end and is resiliently movable at the other end. The charging station is characterised in particular in that the spring element at least partially supports the electric charging cable.