High-voltage battery charge system and charger therefor

Abstract

The invention discloses a high-voltage battery charge system and a charger therefor. The system comprises a rectifying circuit, a power factor correcting circuit, a bus capacitor, a relay non-isolated direct-current to direct-current converting circuit, a relay output capacitor and a non-isolated direct-current to direct-current converting circuit, wherein the rectifying circuit is used for rectifying alternating-current input voltage; the power factor correcting circuit is used for improving power factors and generating bus voltage and is connected to the rectifying circuit; the bus capacitor is connected with an output end of the power factor correcting circuit and a common connecting point; the relay non-isolated direct-current to direct-current converting circuit is used for boosting the bus voltage into relay output voltage and is connected with the output end of the power factor correcting circuit; the relay output capacitor is connected with an output end of the relay non-isolated direct-current to direct-current converting circuit and the common connecting point; and the non-isolated direct-current to direct-current converting circuit is connected with the output end of the relay non-isolated direct-current to direct-current converting circuit and a high-voltage battery, so that the relay output voltage is converted into high-voltage charge voltage to charge a high-voltage battery unit.

Description

technical field [0001] The invention relates to a high-voltage battery charging system, and in particular to a high-voltage battery charging system applied to an electric vehicle and an applicable charger thereof. Background technique [0002] The invention of fuel-powered vehicles has indeed improved the convenience of human movement and the delivery of goods. With the advancement of manufacturing technology, fuel-powered vehicles have been mass-produced. Today, fuel-powered vehicles have become one of the indispensable tools in human life. . At present, the total number of fuel vehicles in the world is about 850 million, and 57% of the world's oil consumption is in the transportation field (67% of which is in the United States). It is estimated that by 2020, fuel vehicles will reach 1.2 billion. There will be a net gap between the two countries, and the contradiction between supply and demand of oil energy will become increasingly prominent. It is estimated that the gap ...

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Problems solved by technology

[0009] The main purpose of the present invention is to provide a high-voltage battery charging system and its applicable charger, so as to solve the problem that it is difficult to obtain a bus capacitor with a high rated voltage value and a high cost for existing electric vehicle chargers, so it is difficult to provide a wide voltage range of high-voltage charging voltage to charge the battery unit, and to solve the problem that the auxiliary power supply circuit of the existing electric vehicle charger cannot continue to supply electric energy to each control unit when the input electric energy is abnormal or interrupted and stops supplying to the power factor correction circuit, resulting in Reduce the reliability of electric vehicles and solve the problem that the bus capacitors of existing electric vehicle chargers cannot be replaced

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