A battery charger and method is disclosed for detecting when a battery has a low state of health while simultaneously charging or maintaining the battery. A battery charger includes a processor; a non-transitory memory device; a power management device to receive an input power and to output a charging current; a pair of electrical conductors to electrically couple with a battery, and a display electrically coupled to the processor. The display being configured to indicate a bad battery indicator when the battery has a low state of health and whether the battery is good to start.

Systems, methods and apparatus for wireless charging are disclosed. A charging device has a plurality of charging cells provided on a charging surface, a charging circuit and a controller. The controller may be configured to cause the charging circuit to provide a charging current to a resonant circuit when a receiving device is placed on the charging surface, detect a change or rate of change in voltage or current level associated with the resonant circuit, provide a measurement slot by terminating the charging current for a period of time, and determine that the receiving device has been removed from the charging surface by performing a passive or digital ping procedure during the measurement slot.

An user-interactive charging paradigm is presented that tailors the device charging to the user's real-time needs. The core of approach is a relaxation-aware charging algorithm that maximizes the charged capacity within the user's available time and slows down the battery's capacity fading. The approach also integrates relaxation-aware charging algorithm existing fast charging algorithms via a user-interactive interface, allowing users to choose a charging method based on their real-time needs. The relaxation-aware charging algorithm is shown to slow down the battery fading by over 36% on average, and up to 60% in extreme cases, when compared with existing fast charging solutions. Such fading slowdown translates to, for instance, an up to 2-hour extension of the LTE time for a Nexus 5X phone after 2-year usage, revealed by a trace-driven analysis based on 976 charging cases collected from 7 users over 3 months.

A signal processing circuit includes: a plurality of A/D conversion units of a plurality of channels, each of plurality of the A/D conversion units including an amplifier configured to amplify an input analog signal and an A/D converter configured to convert an output signal from the amplifier into a digital signal, wherein at least one of operation parameters of the amplifier and the A/D converter is set individually for each of the plurality of channels.

Systems, methods and apparatus for wireless charging are disclosed. A charging device has a plurality of charging cells provided on a charging surface, a charging circuit and a controller. The controller may be configured to cause the charging circuit to cause an excitation flux to be transmitted from the charging device, determine that a compatible chargeable device is available for charging by the charging device when resonance is detected in response to the excitation flux, and provide a charging current to a power transmitting coil of the charging device. The excitation flux may be transmitted in a first range of frequencies that includes a first nominal resonant frequency associated with compatible chargeable devices. The charging current may be provided in a second range of frequencies that includes a second nominal resonant frequency associated with the compatible chargeable devices.

An electronic device includes a charging integrated circuit (IC) including a direct charging circuit that charges a battery; and an application processor that issues a request to an external power source to output a maximum voltage corresponding to a target current, performs a ramp-up operation on a charging current input to the charging IC on the basis of the maximum voltage, compensates for a difference between the charging current and the target current in response to the charging current entering a constant current period, and enters a sleep mode during the constant current period in response to that the charging current reaching the target current.

A power bank with charging management comprises: a charging interface, a charging circuit, a rechargeable battery and a CPU. The charging interface is connected to an external power supply; the charging circuit comprises a voltage and current detecting circuit and a voltage regulating circuit; the input terminal of the voltage and current detecting circuit is connected with the charging interface, for detecting the charging voltage and the operating current of the charging circuit; the CPU is connected with the voltage and current detecting circuit and the voltage regulating circuit, for controlling the voltage regulating circuit to work at the maximum power of the power bank; the input terminal of the voltage regulating circuit is connected with the output terminal of the voltage and current detecting circuit; the output terminal of the voltage regulating circuit is connected with the rechargeable battery, for charging the rechargeable battery at the maximum power.

An apparatus for controlling batteries includes a first current sensor configured to sense a first current flowing from a first battery to an output unit, a first current limiter configured to use a sensing result of the first current sensor to limit an increase of the first current when the first current exceeds a reference current, and a second current activator configured to draw a second current of a second battery to the output unit based on the limiting of the first current limiter.

A battery system includes a solid state switch (SSS), and a battery management system (BMS) including a gate driver and a shunt circuit. The SSS and the BMS share at least one module that is used for both the SSS and the BMS. The at least one module includes at least one of the gate driver and the shunt circuit.

A battery control device includes: a measurement unit that individually measures an amount of discharging current of each discharging secondary battery of discharging secondary batteries among a plurality of secondary batteries which are independently charged and discharged; a time calculating unit that calculates time required for discharging said each discharging secondary battery until said each discharging secondary battery reaches a constant battery capacity based on a discharging current rate for said each discharging secondary battery which is calculated based on the amount of discharging current, and a state of charge (SOC) of said each discharging secondary battery; a number calculating unit that calculates an expected number of charging secondary batteries among said plurality of secondary batteries, which become fully charged in a required time, based on a charging current rate for each charging secondary battery of charging secondary batteries among said plurality of secondary batteries which is calculated based on an amount of charging current of said each charging secondary battery, a SOC of said each charging secondary battery, and the required time, and calculates a total value of the expected number and an existing number of said charging secondary batteries among said plurality of secondary batteries which are already fully charged; and a control unit that determines whether or not to raise the charging current rate based on the total value.