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Z-ARCHIVE-Energy Storage: Bidirectional Direct Current Converters
Search All Applications in Z-ARCHIVE-Energy Storage: Bidirectional Direct Current Converters
Application US20190176652
Published 2019-06-13
Electric Vehicle, Multifunctional Car Charger For Electric Vehicle, And Control Method Thereof
An electric vehicle, a multifunctional car charger therefor and a control method thereof. The charger includes: a bidirectional AC/DC conversion circuit, a first and a second DC/DC conversion circuit, a sampling circuit and a control module. The sampling circuit samples a voltage and a current of a power grid, a voltage of the direct-current end of the bidirectional AC/DC conversion circuit, a voltage and a current of the power battery and a voltage and a current of the low-voltage battery respectively; and the control module is configured to control the bidirectional AC/DC conversion circuit, the first DC/DC conversion circuit and the second DC/DC conversion circuit according to the sampling result of the sampling circuit, to realize any one of a power battery charging function, a low-voltage battery charging function, a power battery alternating-current inversion function, a low-voltage battery alternating-current inversion function and a power battery low-voltage loaded output function.
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- 1. A multifunctional car charger for an electric vehicle, comprising:
a bidirectional AC/DC conversion circuit, wherein an alternating-current end of the bidirectional AC/DC conversion circuit is configured for coupling to a power grid; a first DC/DC conversion circuit, wherein a first direct-current end of the first DC/DC conversion circuit is coupled to a direct-current end of the bidirectional AC/DC conversion circuit, and a second direct-current end of the first DC/DC conversion circuit is configured for coupling to a power battery of the electric vehicle; a second DC/DC conversion circuit, wherein a first direct-current end of the second DC/DC conversion circuit is respectively coupled to a direct-current end of the bidirectional AC/DC conversion circuit and the first direct-current end of the first DC/DC conversion circuit, and a second direct-current end of the second DC/DC conversion circuit is configured for coupling to a low-voltage battery of the electric vehicle; a sampling circuit, wherein the sampling circuit is configured to sample a voltage and a current of the power grid, a voltage of the direct-current end of the bidirectional AC/DC conversion circuit, a voltage and a current of the power battery and a voltage and a current of the low-voltage battery respectively; and a control module, in which a first control circuit for controlling the bidirectional AC/DC conversion circuit, a second control circuit for controlling the first DC/DC conversion circuit and a third control circuit for controlling the second DC/DC conversion circuit are integrated, wherein the control module is configured to correspondingly control the bidirectional AC/DC conversion circuit, the first DC/DC conversion circuit and the second DC/DC conversion circuit through the first control circuit, the second control circuit and the third control circuit according to the voltage and the current of the power grid, the voltage of the direct-current end of the bidirectional AC/DC conversion circuit, the voltage and the current of the power battery and the voltage and the current of the low-voltage battery that are sampled by the sampling circuit, to realize any one of a power battery charging function, a low-voltage battery charging function, a power battery alternating-current inversion function, a low-voltage battery alternating-current inversion function and a power battery low-voltage loaded output function.
- 12. A control method of a multifunctional car charger for an electric vehicle, wherein the multifunctional car charger for an electric vehicle comprises a bidirectional AC/DC conversion circuit, a first DC/DC conversion circuit and a second DC/DC conversion circuit, an alternating-current end of the bidirectional AC/DC conversion circuit is configured for coupling to a power grid, a first direct-current end of the first DC/DC conversion circuit is connected to a direct-current end of the bidirectional AC/DC conversion circuit, a second direct-current end of the first DC/DC conversion circuit is configured for coupling to a power battery of the electric vehicle, a first direct-current end of the second DC/DC conversion circuit is respectively coupled to a direct-current end of the bidirectional AC/DC conversion circuit and the first direct-current end of the first DC/DC conversion circuit, and a second direct-current end of the second DC/DC conversion circuit is configured for coupling to a low-voltage battery of the electric vehicle, the method comprising:
sampling a voltage and a current of the power grid, a voltage of the direct-current end of the bidirectional AC/DC conversion circuit, a voltage and a current of the power battery and a voltage and a current of the low-voltage battery respectively; and controlling the bidirectional AC/DC conversion circuit, the first DC/DC conversion circuit and the second DC/DC conversion circuit according to the voltage and the current of the power grid, the voltage of the direct-current end of the bidirectional AC/DC conversion circuit, the voltage and the current of the power battery and the voltage and the current of the low-voltage battery that are sampled, to realize any one of a power battery charging function, a low-voltage battery charging function, a power battery alternating-current inversion function, a low-voltage battery alternating-current inversion function and a power battery low-voltage loaded output function.
