A power storage system, in which two or more power storage devices are connected in parallel to one power conversion device by wiring, includes a detection unit that detects a voltage of the two or more power storage devices, and a control unit that executes current decrease control for decreasing a predetermined discharge current input to the power conversion device or a predetermined charge current output from the power conversion device to reduce a difference in voltage between the two or more power storage devices when the voltage detected by the detection unit reaches a predetermined voltage.

The present disclosure describes at least a coupling circuit for powering an electric or hybrid aircraft with an output voltage. The couple circuit can include multiple connecting inputs, a charging interface, a connecting output, a high-power diodes arrangement, and a pre-charge circuit. The multiple connecting inputs can connect multiple battery packs. The charging interface can connect to a charger for charging the multiple battery packs. The connecting output can connect with a hardware controller. The high-power diodes arrangement can electrically connect to each respective connecting input and the charging interface. The high-power arrangement can include for each battery pack a first high-power diode and a second high-power diode. The pre-charge circuit can electrically connect to the high-power diode arrangement. The pre-charge circuit can include a first branch with a first switch, and a second branch in parallel with the first branch.

A secondary battery protection circuit for protecting a secondary battery, including: a low-voltage detecting circuit configured to detect a voltage across the secondary battery that is lower than a second voltage for low voltage detection, the second voltage being set to be lower than a first voltage for overdischarge detection; and a switching circuit configured to cause a gate of a charge control NMOS transistor to be fixed at a potential at a high side power supply terminal, upon detecting, by the low-voltage detecting circuit, that the voltage across the secondary battery is lower than the second voltage for low voltage detection.

Systems and methods are disclosed for managing power for a mobile device. In one embodiment, an example mobile device may include at least one memory, at least one processor, a first rechargeable battery, a second rechargeable battery, and one or more solid state relays. The at least one memory may store computer-executable instructions, and the at least one processor may be configured to access the at least one memory and execute the computer-executable instructions. The first rechargeable battery may be configured to power the at least one processor, and the second rechargeable battery may be configured to power the at least one processor. The one or more solid state relays may be electrically coupled to the first rechargeable battery and the second rechargeable battery and configured to transition between a first state in which the one or more solid state relays form a series connection between the first rechargeable battery and the second rechargeable battery and a second state in which the one or more solid state relays form a parallel connection between the first rechargeable battery and the second rechargeable battery.

A motor-driven appliance comprises a drive source for driving a tool, a control unit, a power supply unit, a switch unit, a receiving unit, a supply signal output unit, and a data communication unit. The power supply unit generates a control voltage for operating the control unit. The switch unit supplies the control voltage to the control unit and stops supply of the control voltage to the control unit. The control voltage is supplied to the control unit while a given supply signal is inputted to the switch unit. The supply signal output unit outputs, to the switch unit, the supply signal for supplying the control voltage to the control unit when the receiving unit receives the electromagnetic wave while the supply of the control voltage to the control unit is stopped. The data communication unit outputs, to the control unit, the data contained in the electromagnetic wave.

Provided are a battery charging method and an electronic device. The electronic device includes a connector that includes a first terminal to which a voltage is applied by an external charger and a second terminal for transmitting and receiving data, and a first charging circuit configured to charge a battery of the electronic device by using the voltage applied to the first terminal. The first charging circuit may include a communication circuit configured to transmit information related to the battery through the second terminal, a voltage converter configured to convert a voltage supplied to the battery and a first controller circuit configured to obtain first information regarding a voltage of the battery, control the communication circuit to transmit the first information to a charger connected with the connector, and control the voltage converter to charge the battery using a voltage adjusted based on the first information by the charger, if the adjusted voltage is applied to the first terminal.

A method and apparatus for controlling a battery operating mode. The method includes connecting an electronic processor to a first electrical contact of a battery interface via a switch; generating, with the electronic processor, an initialization pulse for a signal demultiplexer of a battery; transmitting the initialization pulse to the signal demultiplexer; generating, with the electronic processor, a data word indicating a desired operating mode; transmitting the data word to the signal demultiplexer; generating, with the signal demultiplexer, a signal to electrically connect a first battery switch to the first electrical contact, the first battery switch selected based on the data word; receiving, with an analog to digital converter of the electrical device, a signal indicating the operating mode voltage; and verifying, with the electronic processor, a correct operating mode based on the operating mode voltage.

The invention relates to a method of controlling the operation of the electrical power supply to an electric motor vehicle comprising at least two energy storage modules connected in parallel, said modules being able to provide the motor with a delivered electrical power lying between a predetermined minimum power and a predetermined maximum power, noteworthy in that the method comprises the following steps: —detection (100, 110) of an operating anomaly of at least one defective module, —reduction (120, 130) of the maximum power that can be provided by the modules, —electrical disconnection (140) of each defective module, the disconnection step being implemented after the reduction of the maximum power.

Provided is a charge/discharge control circuit controllable by a control signal from a controller that is external. The charge/discharge control circuit includes a control circuit configured to, in response to a power-down control signal for transitioning to a power-down state being input from the controller, latch the power-down control signal and block a discharge path from a secondary cell (SC) to the controller.

Systems and methods are provided for a distributed mufti-sensor witness integrity sensing platform (WISP) approach which allows for positioning of sensors in an enclosed space. In particular, a WISP platform is divided into two modules, with a base module is connected to multiple edge sensor modules with a wired connection. In general, splitting up the distributed WISP system described herein allows multiple sensors to be placed in an enclosed (and generally inaccessible) location. The senor data can be transmitted from the multiple edge sensor modules via a connection to the base module. Additionally, the use of the two module system as provided herein allows the sensors to be positioned meters away from the first module.