A power supply unit for an aerosol inhaler includes: a power supply configured to supply power to a load that atomizes an aerosol source; a temperature sensor configured to acquire a temperature of the power supply; a controller; and a circuit board on which a plurality of elements including the temperature sensor and the controller are mounted. The circuit board includes a first surface and a second surface which is a reverse surface from the first surface or is located on a side opposite from the first surface. The plurality of elements are mounted on each of the first surface and the second surface. The second surface faces the power supply, and/or the second surface is arranged closer to the power supply than the first surface. The temperature sensor is mounted on the second surface.

A multiple-battery charger includes a switching subsystem and a control element. The switching subsystem is configured to selectively electrically connect each of a plurality of individual batteries one at a time to a constrained energy source having electrical power production that varies over time. The control element is operatively connected to the switching subsystem. The control element is configured to deliver one or more pulse width modulated signals to the switching subsystem. The one or more pulse width modulated signals establish a duty cycle with which each of the plurality of batteries is electrically connected to the constrained energy source to receive electrical power from the constrained energy source.

A charging system includes: an input voltage supply circuit; a control circuit coupled to the input voltage supply circuit, configured to control the input voltage supply circuit to generate an input voltage according to a battery voltage of a target battery; and a charging circuit, coupled to the control circuit, configured to receive the input voltage and to provide a charging current to charge the target battery. The input voltage is generated according to a function that takes the battery voltage as a parameter. The input voltage is positively correlated with the battery voltage, and is greater than the battery voltage.

A wireless charging device has a controller and at least one coil that is positioned near the surface of the charging device and configured to transmit an electromagnetic field and a first driver circuit configured to drive the transmitting coil. The controller is configured to cause the driver circuit to provide a charging current to the transmitting coil, decode a request for lower transmission power from a modulation of the charging current, reduce the amplitude of the charging current in accordance with the request for lower transmission power when a temperature measured at a surface of the charging device is less than a threshold temperature, and initiate a cool down sequence when the temperature measured at the surface of the charging device equals or exceeds the threshold temperature. In one example, the request for lower transmission power may be provided in an ASK-modulated signal superimposed on the charging current.

A battery provisioning method is implemented by an outdoor electronic device having a rechargeable battery. The electronic device obtains geolocation information of a geographic location where the electronic device is located. The electronic device further obtains outdoor temperature information of the geographic location based on the geolocation information. A battery setting of the rechargeable battery is determined based on the outdoor temperature information, and used to provision the rechargeable battery of this electronic device. In some implementations, the rechargeable battery is provisioned with an upper limit for a state of charge at each time of installing and initializing the electronic device. During normal operation, the rechargeable battery of the electronic device is charged up to the upper limit for the state of charge, while the upper limit for the state of charge of the rechargeable battery may be updated periodically or upon request.

A control assembly for a thermal management system for a high voltage battery of a plug-in electric vehicle may include a control valve and a control module. The control valve may be operable to control a flow of battery coolant to the high voltage battery from a refrigerant cooling circuit and from a cabin heater core cooling circuit. The control module may be configured to selectively operate the control valve to select a cooling mode, including a refrigerant only mode, a core mode, and a combined mode in which both the refrigerant cooling circuit and the cabin heater core cooling circuit provide cooling to the high voltage battery.

Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may provide a fuel gauge circuit that operates in conjunction with a charger to perform a pre-charging operation of the battery in the event the battery has experienced an over-discharge. The pre-charging operation is defined by a period of time selected according to a measured state of charge and/or an internal resistance of the battery.

A wireless charging device has a controller and at least one coil that is positioned near the surface of the charging device and configured to transmit an electromagnetic field and a first driver circuit configured to drive the transmitting coil. The controller is configured to cause the driver circuit to provide a charging current to the transmitting coil, decode a request for lower transmission power from a modulation of the charging current, reduce the amplitude of the charging current in accordance with the request for lower transmission power when a temperature measured at a surface of the charging device is less than a threshold temperature, and initiate a cool down sequence when the temperature measured at the surface of the charging device equals or exceeds the threshold temperature. In one example, the request for lower transmission power may be provided in an ASK-modulated signal superimposed on the charging current.

A power tool including a battery pack interface configured to receive a battery pack. The battery pack interface includes one or more power terminals and one or more communication terminals. The power tool further includes a controller having an electronic processor. The controller is configured to receive, via the one or more communication terminals, a plurality of signals indicating a plurality of temperatures of the battery pack. The controller is further configured to determine, based on the signals, a battery pack type. The controller is further configured to control discharge of the battery pack based on the battery pack type.

A battery type determination device according to an embodiment includes: an output controller configured to instruct a current application circuit to apply a specific current to a target battery; a voltage response measurer configured to measure a voltage response of the target battery with respect to the current applied using the output controller; a calculator configured to obtain an inductance value of the target battery on the basis of a current value applied using the output controller and a voltage value measured by the voltage response measurer; and a determiner configured to determine a type of the target battery on the basis of a specified value of an inductance according to the type of the target battery and an inductance value of the target battery obtained using the calculator.