In an example embodiment, an apparatus includes a bridge rectifier circuit having branches between the AC and DC nodes formed by a set of transistors. A load current measurement circuit includes a current-controlled current source coupled to the bridge rectifier circuit. The current control current source is configured to generate a mirrored current that is a scaled version of a current through at least one of the set of transistors. A current integration circuit is configured to integrate the mirrored current by charging a capacitor with the scaled current in a first mode and discharging the capacitor in a second mode. A sample and hold circuit is configured to set an output node to a voltage equal to a voltage stored by the capacitor in response to the current integration circuit entering the second mode and prior to the discharge of the capacitor.

A foreign object detector for detecting a foreign object between a transmission pad and a reception pad of a wireless charging system can include a plurality of object detectors; and a detection circuit configured to detect an object based on data received from the plurality of object detectors, in which each of the plurality of object detectors includes a first coil part including a coil wound in a first rotation direction; and a second coil part stacked on the first coil part and including a coil wound in a second rotation direction different from the first rotational direction, and in which each of the plurality of object detectors is connected in series or in parallel with one another.

A measuring method for a portable electrical energy system includes acquiring a total capacity and an initial electric quantity percentage of each battery pack, detecting a discharging current and a discharging time of each battery pack, calculating a discharging capacity of each battery pack, calculating a remaining electric quantity of each battery pack; calculating a real-time electric quantity percentage of each battery pack; acquiring an open circuit voltage of each battery pack and a real-time internal resistance of a cell unit of each battery pack; calculating a remaining electric quantity of each battery pack; and calculating a remaining electric quantity of the portable electrical energy system. This method can reduce the calculation error of the remaining electric quantity and improve the battery utilization.

To shorten a charge time to a battery. A battery control device includes: a discharge controller which controls a discharge from the battery; and a charge controller which controls a charge to the battery. The discharge controller is configured to be capable of performing at least a discharge from the battery to a lower limit SOC determined in advance which is higher than a pre-charge SOC determined in advance. The charge controller is configured to charge the battery at a second charge rate that is lower than a first charge rate determined in advance when a present SOC of the battery is lower than the pre-charge SOC and to charge the battery at the first charge rate when the present SOC of the battery is equal to or higher than the pre-charge SOC.

A battery control device includes: a discharge controller which controls discharge from the battery; a charge controller which controls charge to the battery; and a storage which stores a target charge capacity to be charged to the battery. The discharge controller is configured to be capable of performing at least discharge from the battery to a lower limit SOC determined in advance. The charge controller is configured to start a count of the charge capacity at a timing at which a present SOC of the battery becomes equal to the lower limit SOC when charge is started in a state where the present SOC of the battery is lower than the lower limit SOC, and to end the charge to the battery once the charge capacity having been charged after starting the count becomes equal to the target charge capacity stored in the storage.

Embodiments of the present application provide a method for charging a traction battery and a battery management system, where the method includes: obtaining a negative electrode potential of a traction battery during a charging process of the traction battery; and controlling the traction battery to be discharged when a difference between the negative electrode potential and a preset potential is less than or equal to a safety threshold. The method and the battery management system in the embodiments of the present application can improve the safety performance of the traction battery.

A charging control system includes a lawn mower that includes a battery and performs a lawn mowing work while traveling autonomously, and a charging station for charging the battery. The lawn mower includes a superimposing unit for superimposing, on a charging current, a current indicating period information for defining a shutoff period of supply power to be supplied from the charging station. The charging station includes a current detector for detecting the charging current, an information acquisition unit for acquiring period information based on a detection result of the current detector, a switch for shutting off the supply power, and a shutoff controller for controlling the operation of the switch. The shutoff controller releases the shutoff of supply of power to the lawn mower based on the period information acquired by the information acquisition unit. Therefore, the power consumption of the lawn mower can be reduced.

The present invention provides a method for reasonably adjusting an end-of-discharge voltage of a lithium battery with attenuation of a battery life. The method includes: acquiring an end-of-charge voltage, an end-of-discharge voltage and a rated capacity based on a basic parameter table for a lithium battery, then setting a safety end-of-charge voltage and a safety end-of-discharge voltage to obtain an initial safety discharge capacity, and finally setting a preset discharge capacity of the battery; using an Ampere-hour integration method to estimate a discharged power, taking the preset discharge capacity as a discharge standard, and stopping discharge when the discharged power reaches the preset discharge capacity; and the safety discharge capacity being gradually less than the preset discharge capacity within a battery life cycle, and the battery stopping discharge when the voltage reaches the safety end-of-discharge voltage. By controlling the discharge capacity to be unchanged, the present invention ensures stably outputting power in the case that the battery capacity attenuates, so that a user feels that the endurance mileage of an electric vehicle is stably unchanged within a certain period. The method has the characteristics of simple adjusting control method and convenience in commercialization.

An energy storage system has a battery device, a first terminal, a second terminal, a capacitor device and a DC/DC converter. The first and second terminals are respectively connected two electrodes of the battery device, and the two electrodes have opposite polarities. The capacitor device is electrically connected to the first and second terminals in parallel. The DC/DC converter is electrically connected between the first terminal and the capacitor device. The battery device composed of at least one secondary battery and the capacitor device composed of at least one capacitor are electrically connected to each other in parallel, and by combining with the DC/DC converter, configuring the relation between the equivalent series resistor of the capacitor device and the internal resistor of the battery device, and/or configuring the upper current limit of the rated current of range the DC/DC converter, the battery cycle life is increased.

An electronic includes: a battery; a power supply circuit electrically connected to the battery; and a processor configured to receive power through the power supply circuit, wherein the power supply circuit may be further configured to, based on a ship mode command received from the processor at a first time, switch an operation mode of the electronic device to a ship mode of the electronic device by shutting off power supplied to the processor by the battery at a second time that is delayed from the first time by a preset time.