An electric vehicle (EV) charging station for fast charging (e.g. 5 to 15 minutes) an electric vehicle (EV). The EV charging station can be configured to charge multiple EVs and multiple conventional fuel type vehicles at the same time.

A power system (150) operable to implement a power balancing control scheme is provided. In one aspect, a power system (150) includes multiple independent power supplies (182A, 182B) with independent batteries (172A, 172B) feeding onto a common power bus (180). The power supplies (182A, 182B) regulate the voltage on the common power bus (180) at the same time. The power balancing control scheme, when implemented, causes the load on the common power bus (180) to be shared among the individual power supplies (182A, 182B) with a specified load distribution. The specified load distribution can be set or determined to balance the State of Charge (SoC) of the batteries (172A, 172B) over time whilst taking into account the constraints or limits of the elements (172A, 172B, 182A, 182B) of the power system (150).

A power supply system comprises an alternating-current sweep unit that outputs alternating-current power from a U-phase battery string, a V-phase battery string, and a W-phase battery string that are Y-connected, a first power supply circuit that converts output of a direct-current sweep unit to alternating-current power using an inverter and outputs the alternating-current power, the direct-current sweep unit including a first battery string; and a control device. An energy density of a battery included in the U-phase battery string, the V-phase battery string, and the W-phase battery string is higher than an energy density of a battery included in the first battery string.

An energy storage system and a method for controlling an the energy storage system, includes a plurality of energy storage units. The energy storage unit includes a plurality of battery cells, a plurality of balancing units, a voltage conversion unit, a first switch, a second switch, and a control unit. The control unit is configured to detect fault cases of the plurality of battery cells, and control open and closed states of the first switch and the second switch. According to the application, it can be ensured that each energy storage unit in the energy storage system can continuously work when a battery cell is faulty and when state of charge balance between battery cells is implemented, thereby greatly improving reliability of the energy storage system with low costs.

A charge and discharge control device, which is to be connected with a battery system including a plurality of battery modules, includes an obtaining unit that obtains information on states of the battery modules, an estimation unit that estimates a parameter indicating each of the states of the battery modules by using the information on the states of the battery modules obtained by the obtaining unit, and an output control unit that compares the parameters of the battery modules estimated by the estimation unit, and controls division of output among the battery modules so as to reduce difference between charge states of the battery modules on the basis of a result of comparison.

Disclosed embodiments involve a rechargeable lithium-ion battery module assembly for use as an auxiliary power unit (APU), particularly in commercial trucks. Battery module assembly is recharged through the semi-trailer truck's alternator during engine operation. Battery module assembly has active voltage control capabilities to reduce charge time. Each battery array has two collector plate printed circuit board assemblies (PCBA) and two banks of lithium iron phosphate (LFP) battery cells. Individual battery cells are wire bonded to the collector plate PCBs, one of such PCBs incorporates a battery management system to monitor the electrical parameters and state of charge of the battery cells in the system. Battery cells are thermally coupled to an aluminum enclosure with a thermal gap filling material. Using different chemistries for the APU and the starting battery of the commercial truck, and methods of sequential charge and discharge cycles of each, without any other discrete device.

A wireless power receiver is for receiving power from a wireless power transmitter, the wireless power receiver may include at least one of: resonant circuitry; communication circuitry; and a controller configured to at least one of: enable a charging function to receive, through the resonant circuitry from the wireless power transmitter, first power for charging the wireless power receive, transmit, through the communication circuitry, a first signal indicating complete charge to the wireless power receiver while receiving the first power, receive, through the communication circuitry, a first charging function control signal that disables a charging function from the wireless power transmitter, based on the receiving of the first charging function control signal, disable the charging function, after disabling the charging function, identify that charging is required, transmit, through the communication circuitry, a second signal including information which is, by the wireless power receiver, set based on identifying that the charging is required to the wireless power transmitter, receive, through the communication circuitry, a second charging function control signal, and based on the receiving of the second charging function control signal, enable the charging function without outputting the indication related to the charging.

Described herein is a battery pack cell state of charge balancing system (1). A battery pack (2) of the system comprises a plurality of serially connected battery pack cells (BAT1-BATn), each of which (BATx) comprises one or more battery cells connected in parallel. For each respective battery pack cell (BATx) there is a set of serially connected fuel cells (FCx) at battery pack cell voltage level. Each respective set (FCx) is selectively connectable in parallel to a respective corresponding battery pack cell (BATx) by closing a respective first switch (SWx), for charging or boosting battery pack cell (BATx) power output. Each set (FCx) includes a respective DC-DC converter, arranged to regulate the operating point of the set (FCx) to its maximum power point or uniquely selected other operating point, to maintain the respective battery pack cell (BATx) at a defined state of charge for all battery pack cells (BAT1-BATn) constituting the battery pack (2).

A power supply structure and an electronic cigarette having same are provided. The power supply structure includes at least two rechargeable batteries connected in series, a charging circuit connected to the rechargeable batteries and used to charge the rechargeable batteries, and a switching circuit connected to the at least two rechargeable batteries. The switching circuit is used to switch the at least two rechargeable batteries into battery series circuits having different number of rechargeable batteries connected in series. The charging circuit is used to detect the voltages of the battery series circuits and convert a standard charging voltage into different charging voltages for charging the battery series circuits according to the detected voltages.

In a power supply system and a method for controlling the same, at least one battery from among a plurality of batteries is designated as a charging-side battery, and the remaining batteries are designated as discharging-side batteries. Next, the difference in current between the current flowing from the discharging-side batteries and the current flowing into the charging-side battery is determined on the basis of currents measured by a plurality of current measuring instruments. Next, the transformation rate of a voltage transformer connected to the discharging-side batteries is determined on the basis of the determined difference in current.