Abstract:
The present invention provides a battery heating circuit, comprising a switch unit (10), a switching control module (100), a one-way semiconductor element D10, a damping element R, and a transformer (T), wherein, the switching control module (100) is electrically connected with the switch unit (10); the battery, damping element R, first winding of the transformer (T), and switch unit (10) are connected in series with each other to constitute a battery discharging circuit; the battery, damping element R, second winding of the transformer (T), and one-way semiconductor element D10 are connected in series with each other to constitute a battery charging circuit. The transformer in the present invention serves as an energy storage element, and has current limiting function. The present invention not only can limit the magnitude of current in the battery charging/discharging circuit, thereby the battery and switch unit can be protected against damage by heavy current, but also can reduce the energy loss in the heating process.
Abstract:
A battery heating circuit, comprising a switch unit (1), a switching control module (100), a damping element R1, an energy storage circuit, and an energy transfer unit, wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a charge storage element C1; the damping element R1 and switch unit (1) are connected in series with the energy storage circuit; the switching control module (100) is connected with the switch unit (1), and is designed to control ON/OFF of the switch unit (1), so as to control the energy flowing between the battery and the energy storage circuit; the energy transfer unit is connected with the energy storage circuit, and is designed to transfer the energy in the energy storage circuit to the energy storage element after the switch unit (1) switches on and then switches off. The heating circuit provided in the present invention can improve the charge/discharge performance of the battery, improve safety when the battery is heated, and also has an energy recycling function.
Abstract:
A battery heating circuit is provided, comprising a switch unit (1), a switching control module (100), a damping element R1, and an energy storage circuit, the energy storage circuit is designed to connected with the battery and comprises a current storage element L1 and a charge storage element C1; the damping element R1, switch unit (1), current storage element L1, and charge storage element C1 are connected in series; the switching control module (100) is connected with the switch unit (1) and is designed to control ON/OFF of the switch unit (1), so as to control energy flowing from the battery to the energy storage circuit only. The heating circuit provided in the present invention can improve the charge/discharge performance of the battery, improve safety when the battery is heated.
Abstract:
The present invention provides a battery heating circuit, comprising a plurality of switch units (1), a switching control module (100), a damping element R1, an energy storage circuit, and a polarity inversion unit (101), wherein, the energy storage circuit is connected with the battery, and comprises a current storage element L1 and a plurality of charge storage elements C1; the plurality of charge storage elements C are connected with the plurality of switch units (1) in series in one-to-one correspondence to form a plurality of branches; the plurality of branches are connected in parallel with each other and then connected with the current storage element L1 and damping element R1 in series; the switching control module (100) is connected with the switch units (1), and is configured to control ON/OFF of the switch units (1), so that the energy flows to and fro between the battery and the energy storage circuit when the switch units (1) switch on; the polarity inversion unit (101) is connected with the energy storage circuit, and is configured to invert the voltage polarity of the plurality of charge storage elements C1 after the switch units (1) switch from ON state to OFF state. The heating circuit provided in the present invention can improve charge/discharge performance of the battery, as well as safety and work efficiency in the battery heating process.
Abstract:
The present invention provides a battery heating circuit, wherein: a battery E, a damping element R1, a current storage element L1, a switch unit DK1 and a charge storage element C are connected in series to form a battery discharging circuit; a current storage element L2 is connected with an one-way semiconductor element D3 in series, and then the series circuit composed of the current storage element L2 and one-way semiconductor element D3 is connected in parallel to the ends of the switch unit DK1; the charge storage element C1, current storage element L2 and one-way semiconductor element D3 are connected in series in sequence to form a battery back-charging circuit; and a switch unit DK2 is connected in parallel to the ends of the serially connected charge storage element C1 and current storage element L2, and works together with the current storage element L2 to form a voltage regulation and polarity inversion circuit for the charge storage element C1. In the present invention, the voltage across the charge storage element C1 can be regulated flexibly by controlling the switch unit DK2 in the voltage regulation and polarity inversion circuit.
Abstract:
A method for eliminating background noise may comprise a) detecting a characteristic value of an audio signal to obtain a characteristic signal reflecting a change trend of the audio signal; b) multiplying the characteristic signal and the audio signal to obtain a product signal; and c) 5 amplifying the product signal proportionally and outputting the amplified product signal. A device for eliminating background noise is also disclosed.
Abstract:
The present invention provides a touchpad comprising a double-layer printed circuit board and an insulating layer attached onto the upper layer of the board, the board comprises an upper layer and a lower layer, the upper layer comprises a plurality of first axial conductive units, a first axial conductive wire, and a plurality of second axial conductive units, the lower layer comprises a wire connecting zone and a component zone defined by the wire connecting zone, the wire connecting zone includes a wire; a first conductor; and a second conductor; the plurality of first and second axial conductive units are serially-connected via the first and second axial conductive wires respectively; and the second axial conductive wire is electrically coupled to the second axial conductive units via the second conductor. According to the present invention, the manufacturing process is simple and the cost is low.
Abstract:
The present invention discloses a microphone, which may comprise an inner unit comprising a microphone module; a driver module coupled to the microphone module; a noise cancellation module coupled to the driver module; and a housing for accommodating the inner unit. At least two modules selected from the microphone module, the driver module and the noise cancellation module may be integrated in a chip. The microphone according to the present invention has a smaller volume with reduced technical complexity.
Abstract:
A method for eliminating background noise and a device thereof are provided. The method may comprise the steps of : detecting an effective value of a received audio signal to generate an output signal corresponding to an average power of the received audio signal (step A); generating a noise eliminating control signal by comparing the output signal corresponding to the average power signal with first threshold determined based on the difference between an average power of the voice signal and an average power of the noise signal (step B); eliminating the noise signal from the received audio signal, and amplifying the voice signal in the received audio signal with the control of the noise eliminating control signal. Based on the method and device, the background noise may be eliminated effectively.
Abstract:
Methods and systems for detecting internal battery abnormalities during charging and discharging states. The systems include a circuit (301) for determining charging and/or discharging state of the battery, a circuit for sampling the battery voltage at sequential time points, a circuit for measuring the decline of the voltage, a counter for counting the time T dec while the voltage is in decline, a circuit for measuring the rate of the decrease of the voltage, a circuit for producing an indicator for internal abnormalities if one or more of the following conditions is met: (a) the battery is in the charging state and T dec exceeds a predetermined time; (b) the battery is in the charging state and the decrease of the voltage exceeds a predetermined voltage; and (c) the battery is in the discharging state and the rate of the decrease of the voltage exceeds a predetermined decline rate.