A Smart Battery Charger with Wide Input Voltage Range
A voltage range, smart battery technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as narrow input voltage range, achieve the effect of improving reliability and expanding the working range
Inactive Publication Date: 2017-08-08
CHONGQING UNIV
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Problems solved by technology
However, due to the limitation of the power supply voltage, this type of chip allows a narrow input voltage range.
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[0015] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0016] figure 2 The circuit schematic diagram of the wide input voltage range intelligent battery charger provided for the embodiment of the present invention, as shown in the figure, includes a single-chip microcomputer controller, a current comparison circuit, a voltage comparison circuit and a signal amplification circuit; the single-chip microcomputer control The first input terminal of the device is connected to the output current sampling terminal; the second input terminal of the single-chip controller is connected to the output voltage sampling terminal; the first output terminal of the single-chip controller is connected to the non-inverting input terminal of the current comparison circuit; the single-chip The second output terminal of the controller is connected with the non-inverting input terminal of the voltage comparison circuit. ...
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The invention discloses an intelligent battery charger with a wide input voltage range, which is characterized in that it includes a single-chip controller, a current comparison circuit, a voltage comparison circuit and a signal amplification circuit; the first input of the single-chip controller The terminal is connected to the output current sampling end; the second input terminal of the single-chip controller is connected to the output voltage sampling end; the first output terminal of the single-chip controller is connected to the non-inverting input end of the current comparison circuit; the second input terminal of the single-chip controller is The output terminal is connected to the non-inverting input terminal of the voltage comparison circuit; the inverting input terminal of the operational amplifier U1 is connected to the output current sampling terminal; the inverting input terminal of the operational amplifier U2 is connected to the output voltage sampling terminal; the output of the operational amplifier U3 Power management chip that terminates the DC / DC converter. The invention expands the working range of the input voltage through the joint architecture of the MCU controller and the DC / DC converter, improves the application reliability of the smart charger, and allows charging a higher voltage battery pack at the same time.
Description
technical field [0001] The invention relates to the field of power electronic power conversion, in particular to an intelligent battery charger with a wide input voltage range. Background technique [0002] At present, the application of lithium-ion batteries in various electronic products has become more and more common, and its service life is greatly affected by the charging method. Studies have shown that the battery charging process has a great impact on battery life, while the discharge process has relatively little impact. The correct charging strategy can effectively extend the life of the battery. Lithium-ion batteries mainly have requirements on the parameters of charging voltage and charging current during the charging process, and generally adopt the constant current to constant voltage charging method. In the pre-charging stage, charge the battery with a small current to activate the over-discharged unit inside the battery; in the second stage, the charging cu...
Claims
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IPC IPC(8): H02J7/00
Inventor 王斌叶云波
Owner CHONGQING UNIV