Systems and methods for providing notifications regarding battery pack charging status. One charging system includes a battery charger and an external device. The battery charger includes a housing, a battery pack interface, a wireless communication controller, and a charger controller. The charger controller receives status information associated with power tool battery packs and transmits the status information to an external device. The external device includes a display and an external device controller. The external device controller receives the status information from the charger controller and controls the display to display the status information via a user interface.

Charging an accumulator having an energy storage cell, a data interface and a wake-up circuit. A charging apparatus contains a data interface, a controller, a timer and a switch apparatus. The data interfaces connected to one another via a communication line for differential communication between the accumulator and charging apparatus. Setting the timer to a predetermined period of time; setting the control electronics of the accumulator to a deactivation mode; sending at least one signal from the charging apparatus to the accumulator via the communication line after the predetermined period of time has elapsed; activating the wake-up circuit for activating control electronics by detecting a voltage value from the communication line, the voltage value is consistent with either the dominant or recessive state of the communication line; setting the control electronics to an activation mode; and requesting or releasing a charging current from the charging apparatus using the accumulator.

A device for controlling battery operation includes a battery cell, a thermal cutoff, and a battery management system. The thermal cutoff is coupled in series between the battery cell and a system load of the device. The thermal cutoff has at least three terminals. A first terminal of the thermal cutoff is electrically-coupled to the battery cell and a second terminal of the thermal cutoff is electrically-coupled to the system load. The thermal cutoff includes a permanent failure mechanism having an open state and closed state wherein the closed state allows electrical communication between the first terminal and the second terminal. The battery management system is electrically-coupled to a third terminal of the thermal cutoff. The permanent failure mechanism permanently switches to the open state in response to an electrical signal from the battery management system.

A rechargeable battery jump starting device with a discharged battery pre-conditioning system to facilitate boosting the discharged battery to jump start a vehicle or equipment engine. The pre-conditioning increases the operating voltage to the discharged battery during the pre-conditioning phase.

An electronic device may include a power management circuit (PMC) configured to charge a battery using a power signal, a processor connected to the PMC, and a memory connected to the processor. The memory may store instructions that, when executed, cause the processor to identify that an internal temperature of the electronic device increases to a first temperature while a current power signal value is a first charging current, configure the current power signal value to a thermal control current lower than the first charging current as the internal temperature increases to the first temperature, identify that the internal temperature decreases to a second temperature while the current power signal value is the thermal control current, and configure the current power signal value to a second charging current lower than the first charging current but higher than the thermal control current as the internal temperature decreases to the second temperature.

Certain aspects relate to a ground support cart for charging an electric aircraft. An exemplary ground support cart includes a frame, at least a wheel operatively coupled to the frame and configured to facilitate rolling translation of the ground support cart, a cart battery mounted to the frame and configured to provide a first electrical charging current, a conductor in electric communication with the at least a cart battery, a coolant source mounted to the frame and configured to provide a coolant flow, a hose in fluidic communication with the coolant source, and a controller configured to control the first electrical charging current within the conductor and the coolant flow within the hose.

A battery pack includes a pack case configured to form an appearance, a plurality of battery modules configured to include at least one battery cell; at least one insulation member provided between the plurality of battery modules; and an energy drain unit spaced apart from the insulation member and connected to any one battery module, the energy drain unit being configured to externally short-circuit any one battery module when thermal runaway occurs in at least one battery module.

Exemplary power supply systems and methods according to the present invention include circuitry that is configured to provide DC power and configured to receive a input signal that originates from a portable electronic device (the “PED”) and to provide a output signal to be sent to the PED. Such circuitry is configured to be coupled to the PED via a connector having a first, second, third, and fourth conductor. Such a connector is configured to be detachably mated with a power input interface of the PED to transfer the DC power to the PED, a ground reference to the PED, the input signal from the PED to the circuitry, and, in coordination with the input signal, the output signal from the circuitry to the PED, which is usable by the PED in connection with control of charging a battery of the PED based on the DC power provided by the circuitry.

A jump starting device having USB. For example, a handheld jump starting device having USB for boosting or charging a depleted or discharged battery. The handheld jump starting device, for example, can include a rechargeable lithium ion battery pack and a microcontroller. The lithium ion battery can be coupled to a power output port of the device through a power switch circuit actuated by the microcontroller.

A non-contact charging station with a planar-spiral power transmission core, a non-contact power-receiving apparatus, and a method for controlling the same. A primary core of the non-contact charging station transmitting a power signal to a portable device using an induced magnetic field and a secondary core of the non-contact power-receiving apparatus are configured as a power transmission Printed Circuit Board (PCB) core in which a planar-spiral core structure is formed on a core base. The power transmission PCB core has a simplified shape along with improved applicability that facilitates its mounting on a non-contact charger. In addition, the receiving core has a reduced volume to reduce the entire size of the power-receiving apparatus so that it can be easily mounted onto a portable device.