A battery management system includes a voltage sensor to generate a voltage signal indicating a voltage of a battery, a current sensor to generate a current signal indicating a current flowing through the battery, and a control unit to record a voltage history and a current history of the battery based on the voltage signal and the current signal at a predetermined time interval during constant current charging of the battery. The control unit determines a differential capacity curve indicating a correlation between the voltage of the battery and a differential capacity in a reference voltage range. The control unit performs a first protection operation for the battery by comparing a first characteristic voltage of a main feature point with a reference voltage when the main feature point is detected from the differential capacity curve.

A method for capacity expansion of an energy storage system and an energy storage system are provided. The method is applied to a controller in the energy storage system. The controller acquires a value of a characteristic parameter of a to-be-added second energy storage device as a target characteristic value. Then, the controller controls a charge/discharge power converter to charge or discharge first energy storage devices until a proximity of a value of a characteristic parameter of at least one first energy storage device to the target characteristic value is less than a preset proximity. Finally, a signal indicating that the second energy storage device is allowed to be connected into the energy storage system is generated and outputted to notify an operator.

Embodiments of the present application provide a charging and discharging device. The charging and discharging device includes an AC/DC converter, a first DC/DC converter, a second DC/DC converter and a control unit. The control unit is used to: receive a first charging request, the first charging request including a first charging voltage and a first charging current; set output power of the first DC/DC converter based on the first charging voltage and the first charging current; turn on the second DC/DC converter if an SOC of the energy storage unit is greater than a first threshold to charge the battery by the energy storage unit; and adjust output power of the second DC/DC converter, so as to enable a voltage difference between a bus voltage and a bus balance voltage of the charging and discharging device to be less than or equal to a preset value.

Embodiments of the present application provide a charging/discharging apparatus, a method for charging a battery and a charging/discharging system, the charging-and-discharging apparatus including a bidirectional AC/DC converter, a first DC/DC converter, and a control unit, where the first DC/DC converter is a bidirectional DC/DC converter; and where the control unit is configured to: receive a first charging current sent by a BMS of a battery, control the bidirectional AC/DC converter and the first DC/DC converter according to the first charging current to charge the battery through an AC power; receive a first discharging current sent by the BMS and discharging a power of the battery according to the first discharging current; and receiving a second charging current sent by the BMS and control the bidirectional AC/DC converter and the first DC/DC converter according to the second charging current to charge the battery through the AC power.

A battery charging circuit for charging batteries includes a first switch connected in series between a first pole of a power supply and a first pole of the first battery cell, a second switch connected in parallel between the first pole of the first battery cell and a second pole of the first battery cell configured to adjust a size of a current applied to the first battery cell, a third switch connected in parallel between a first pole of the second battery cell and a second pole of the second battery cell, the third switch being configured to adjust a size of a current applied to the second battery cell, and a fourth switch connected in series between the second pole of the first battery cell and the first pole of the second battery cell.

The embodiments of the present application provide a method for charging a battery, a battery management system, and a charge and discharge device. The method for charging the battery includes: acquiring, by a BMS, a first charge current and sending it to a charge and discharge device, thus making the charge and discharge device charge the battery based on the first charge current; if a first accumulated charge quantity of the battery is greater than or equal to a first accumulated charge quantity threshold value, acquiring, by the BMS, a first discharge current and sending it to the charge and discharge device, thus making the charge and discharge device control the battery to discharge based on the first discharge current; and if a first accumulated discharge quantity of the battery is greater than or equal to a first accumulated discharge quantity threshold value.

A mobile powered workstation can include a head unit assembly that can have at least one power outlet configured to provide power to at least one electronic device. The workstation can include a power system coupled to the head unit assembly. The power system can include a permanent battery and a battery assembly. The battery assembly can include a battery connection housing that can have a plurality of power connectors configured to electrically couple to a corresponding plurality of power connectors of a replaceable battery, the battery connection housing can have a first face and a second face that extends from the first face. The first face can define a first raised portion configured to engage with a corresponding first recessed portion in the replaceable battery. The second face can define a second raised portion configured to engage with a corresponding second recessed portion in the replaceable battery.

A method of controlling a plurality of batteries and an electronic device to which the same is applied. The electronic device includes a housing and a plurality of batteries. The electronic device also includes a power management module, a plurality of current limiting ICs, and a processor operationally connected to the plurality of batteries, the power management module and the plurality of current limiting ICs. The processor is configured to sense a sum of the currents flowing into the plurality of batteries or a voltage of the power management module, perform a primary end of reducing a magnitude of the sum of the currents flowing into the plurality of batteries, sense the currents or voltages of the plurality of batteries, and perform a secondary end of blocking a current flowing into a battery.

In an approach for selecting a battery charging rate, a processor, responsive to an electronic device with a rechargeable battery being connected to a battery charging device, identifies a current battery status of the rechargeable battery. A processor determines a disconnect time of the battery charging device. A processor determines a charge level required. A processor determines a charging profile based on the current battery status, the disconnect time of battery charging device, and the charge level required. A processor sends the charging profile to the battery charging device.

Electric vehicle charging scheduling includes receiving repeated sensor readings of a battery of an electric vehicle, the readings monitoring a charge of the battery while the electric vehicle proceeds along a contemporaneously scheduled route. Then, a geolocation of the electric vehicle is determined and a database queried with the geolocation. A charging station is then identified within geographic proximity of the geolocation of the electric vehicle. As well, a route scheduled for the electric vehicle after the contemporaneously scheduled route is determined. Thereafter, a threshold charge is computed that is requisite to complete both the contemporaneously scheduled route and also at least a portion of the route scheduled after the contemporaneously scheduled route. Finally, in response to a determination that the monitored charge on the battery is below the threshold level, an alert is displayed indicating to charge the battery at the identified charging station.