A load modulation circuit applied to a power adapter, comprising a temperature sensing circuit, a rectification sensing circuit and a control circuit. The temperature sensing circuit is configured to obtain a temperature sensing voltage according to an internal temperature of the power adapter. The rectification sensing circuit is coupled to a transformer circuit of the power adapter to obtain a rectification sensing voltage. The control circuit is coupled to the transformer circuit, the temperature sensing circuit and the rectification sensing circuit, and is configured to determine whether the temperature sensing voltage exceeds a preset voltage range. When the temperature sensing voltage exceeds the preset voltage range, the control circuit is configured to generate an adjustment signal according to the rectification sensing voltage to adjust an output signal or an operating power of the power adapter.

A downhole power system includes an energy storage adapted to operate at high temperatures, and a modular signal interface device that serves to control the energy storage component as well as offer a means of data logging at high temperatures. The controller is fabricated from pre-assembled components that may be selected for various combinations to provide desired functionality. The energy storage may include at least one ultracapacitor.

An electronic device may include a battery, a charging circuit, at least one sensor, a plurality of temperature sensors disposed respectively at different positions, at least one processor operatively coupled to the battery, the charging circuit, the at least one sensor, or the plurality of temperature sensors, and memory. The memory storing instructions which are configured to, when executed, cause the electronic device to, measure temperature values at intervals of a predefined period using the plurality of temperature sensors during charging, identify a heat state based on at least in part of the measured temperature values, identify a user contact state using the at least one sensor, and control charging power for the battery through the charging circuit based on the heat state and the user contact state. Various other embodiments are also available.

In an embodiment, a method for performing foreign object detection (FOD) testing of a wireless power transmitter includes: placing a foreign object (FO) between the wireless power transmitter and a wireless power receiver; beginning to wirelessly transmitting power from the wireless power transmitter towards the wireless power receiver; a predetermined amount of time after beginning to wirelessly transmit power, measuring an FO temperature indicative of a temperature of the FO, a transmitter temperature indicative of a temperature of the wireless power transmitter, and a receiver temperature indicative of a temperature of the wireless power receiver; determining a weighted average temperature based on the measured transmitter temperature and the measured receiver temperature; and when a difference between the measured FO temperature and the weighted average temperature is higher than a threshold temperature, asserting an error flag indicative that the FOD test failed.

A method of performing fast-charging for a lithium-ion battery (LIB) includes sensing an environmental temperature, performing an initial constant-current charging and subsequent discharge of the LIB, and evaluating whether the sensed environmental temperature falls below a threshold temperature. If the sensed environmental temperature initially falls below a threshold temperature, the LIB is charged via a dynamic alternating current (AC) charging according to a low-temperature charging algorithm to heat and charge the lithium-ion battery. Once the LIB reaches a temperature below the threshold temperature, charging switches to a comparatively high-temperature charging algorithm.

A charger circuit comprises a constant current charging circuit and a thermal regulation circuit. The constant current charging circuit is configured for generating a charging current, including a charger input terminal for receiving an input voltage, a charge current setting terminal, a charger output terminal for outputting the charging current, a current mirror including a reference current path between the charger input terminal and charge current setting terminal and an output current path between the charger input terminal and charger output terminal, and a feedback amplifier having a positive terminal, a negative terminal for receiving a feedback reference voltage, and a feedback output terminal coupled to the current mirror. The thermal regulation circuit is configured for generating and modulating a thermal regulation voltage with temperature, and outputting the thermal regulation voltage across the positive terminal of the feedback amplifier and the charging current setting terminal.

The battery electric vehicle selects and executes a charge mode from a first charge mode in which power supplied from an external power source device to a first neutral point of a first motor is supplied to a power storage device via the first motor and a first inverter, and a second charge mode in which power supplied from the external power source device to a second neutral point of a second motor is supplied to the power storage device via the second motor and a second inverter, based on at least one of temperatures of the first and second motors and temperatures of the first and second inverters.

A wireless charger device can support multiple different receiver devices having different wireless charging specifications. The wireless charger device can house two wireless power transmitter coils having different dimensions and arranged coaxially with each other. A first coil can have a size and shape compatible with a portable device such as a smart phone while the second coil can have a size and shape compatible with a smaller device such as a smart watch. The first coil and the second coil can deliver power through the same charging surface, or the first coil can deliver power through a first charging surface while the second coil can deliver power through a second charging surface opposite the first charging surface.

A wireless charger for a mobile device includes a coil arranged adjacent to a charging surface. A power conversion module is configured to selectively supply power from a power source to the coil to wirelessly charge the mobile device. A temperature sensor is configured to sense a temperature at the charging surface of the wireless charger. A material sensor is configured to sense a material of a cover of the mobile. A communications and control module is configured to control wireless charging of the mobile device based on the sensed temperature and a temperature range selected in response to the sensed material of the cover of the mobile device.

A method for monitoring an electric vehicle charging apparatus is provided. A charging pile that includes a power meter and a processor is used to provide a charging current to an electric vehicle through a charging connector. The power meter detects the charging current to generate an initial current value and an initial power value that correspond to an initial charging time, and a present current value and a present power value that correspond to a present time, so that the processor calculates an initial resistance value and a present resistance value of the charging connector accordingly, and then calculates an estimated present temperature value of the charging connector based on the initial resistance value and the present resistance value. The estimated present temperature value is compared with an over-temperature threshold to determine whether to reduce the charging current.