Transformer-free battery charger for electric vehicle
A technology for battery chargers and electric vehicles, applied in electric vehicles, battery circuit devices, collectors, etc., can solve the problems of bulkiness, high production cost, and large volume, and achieve the effects of cost reduction, weight reduction, and volume reduction
Active Publication Date: 2012-08-01
CHANGZHOU WUJIN HGPOWER +1
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[0003] The purpose of the present invention is to provide a battery charger for electric vehicles without a transformer, so as to overcome the shortcomings of the existing battery chargers for electric vehicles with transformers, such as large volume, heavy weight, and high production costs.
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[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0022] See figure 1 , The transformerless electric vehicle battery charger of this embodiment is composed of a main circuit 1 , a control circuit 2 and a charging interface circuit 3 .
[0023]The aforementioned main circuit 1 has an AC input terminal A1, a DC output terminal A2, a first control signal input terminal A3 and a second control signal input terminal A4; the control circuit 2 has an AC power input terminal B1, a charging voltage signal input terminal B2, a charging The current signal input terminal B3, the battery temperature signal input terminal B4, the first control signal output terminal B5 and the second control signal output terminal B6; the charging interface circuit 3 has a charging interface J1, a charging voltage signal output terminal J2, a charging current signal The output terminal J3 and the battery temperature signal...
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The invention provides a transformer-free battery charger for a electric vehicle, which comprises a main circuit, a control circuit and a charging interface circuit. The main circuit can be in a series connection with a voltage dividing capacitor and a filtering energy storage capacitor through a plurality of crystal diodes to divide voltage to generate a direct current output when a positive half circle of alternating current is input, and can generate a voltage stable direct current output by the aid that the voltage dividing capacitor discharges and complements electricity for the filtering energy storage capacitor when a negative half circle of the alternating current is input. The control circuit can process sampled charging voltage signals, charging current signals and battery temperature signals and then exerts a feedback action on the main circuit to guarantee that output voltage and current conform to the requirements of a rechargeable battery. The charging interface circuit provides a battery charging interface and outputs the charging voltage signals, the charging current signals and the battery temperature signals in battery charging to the control circuit. According to the transformer-free battery charger for the electric vehicle, transformers are omitted, thereby the battery charger for the electric vehicle is reduced in size, lightened in weight and lowered in cost.
Description
technical field [0001] The invention relates to a battery charger, in particular to a battery charger for an electric vehicle without a transformer. Background technique [0002] At present, the common battery chargers for electric vehicles all contain a transformer for step-down, so the volume cannot be made small and heavy, and the transformer occupies a large production cost in the battery charger for electric vehicles. Contents of the invention [0003] The object of the present invention is to provide a battery charger for electric vehicles without a transformer, so as to overcome the shortcomings of the existing battery chargers for electric vehicles with transformers such as large volume, heavy weight and high production cost. [0004] The technical solution of the present invention is: a battery charger for a transformerless electric vehicle, the structural features of which include a main circuit, a control circuit and a charging interface circuit; the main circu...
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IPC IPC(8): H02J7/02
Inventor 冯俊萍贝绍轶赵良赵景波
Owner CHANGZHOU WUJIN HGPOWER