Abstract: Provided is a planar power module with a spatially interleaved structure, including a top power substrate, a bottom power substrate arranged opposite to the top power substrate, and a plurality of interleaved switch units configured between the top power substrate and the bottom power substrate; wherein adjacent interleaved switch units are electrically connected through a current commutator so that the interleaved switch units form spatial position interleaving. Problems of uneven parallel currents and uneven heat dissipation in the power module are solved.

Abstract: A joint control method with variable ZVS angles for dynamic efficiency optimization in a WPC system for EVs under ZVS conditions, including: adjusting a phase-shift duty cycle of a secondary active rectifier to control a charging voltage and a charging current of EV's batteries through a charging voltage closed loop and a charging current closed loop, respectively; adjusting a power angle of the secondary active rectifier to control a ZVS angle of the secondary active rectifier through a secondary ZVS angle closed loop; adjusting a phase-shift duty cycle of a primary inverter to control a ZVS angle of the primary inverter through the primary ZVS angle closed loop; determining the current operating case of the WPC system and adjusting the ZVS angles of the primary inverter and the secondary active rectifier to automatically identify an optimal operating point with a maximum charging efficiency through the P&O method.

Abstract: The present invention provides a current detection circuit applied to a SiC field effect transistor. The current detection circuit includes a current detection loop and an acquisition loop on the current detection loop. The current detection loop includes a voltage source, a capacitor, a first SiC field effect transistor, a second SiC field effect transistor, and a sampling resistor. The first SiC field effect transistor is connected to a power signal. The second SiC field effect transistor is connected to a pulse signal. The acquisition loop includes a compensating resistor and a compensating inductor. The compensating resistor and the compensating inductor are connected in series and then connected in parallel at two ends of the sampling resistor to counteract the influence of total parasitic inductance in the current detection loop.

Abstract: The present invention relates to a three-dimensional integrated package device for a high-voltage silicon carbide power module, comprising a source substrate, first chip submodules, a first driving terminal, a first driving substrate, a ceramic housing, a metal substrate, a water inlet, a water outlet, second chip submodules, a second driving terminal, a second driving substrate and a drain substrate from top to bottom; and each first chip submodule is composed of a driving connection substrate, a power source metal block, a first driving gate metal post, second driving gate metal posts, a silicon carbide bare chip, an insulation structure and the like. A three-dimensional integrated half-bridge structure is adopted to greatly reduce corresponding parasitic parameters.

Abstract: Provided is a planar power module with a spatially interleaved structure, including a top power substrate, a bottom power substrate arranged opposite to the top power substrate, and a plurality of interleaved switch units configured between the top power substrate and the bottom power substrate; wherein adjacent interleaved switch units are electrically connected through a current commutator so that the interleaved switch units form spatial position interleaving. Problems of uneven parallel currents and uneven heat dissipation in the power module are solved.

Abstract: The present invention discloses a current phase locking and driver pulse generation method for wireless charging for electric vehicles. By monitoring the resonant current iL2 of the receiving coil, the proposed method generates the synchronization signal accurately based on the phase of the current iL2. Moreover, it controls the phases of driver pulses of switching transistors according to the synchronization signal so as to control the turn-on moment and turn-off moment of the switching transistors in the secondary rectifier. As a result, by using the proposed method, the pulse losing of the switching transistors in the secondary active rectifier can be avoided; the stable and reliable phase locking of the high-frequency resonant current and generation of driver pulses can be achieved; the anti-interference capability can be greatly enhanced, and the stability and reliability of the wireless charging system for electric vehicles can also be improved.

Abstract: A joint control method with variable ZVS angles for dynamic efficiency optimization in a WPC system for EVs under ZVS conditions, including: adjusting a phase-shift duty cycle of a secondary active rectifier to control a charging voltage and a charging current of EV's batteries through a charging voltage closed loop and a charging current closed loop, respectively; adjusting a power angle of the secondary active rectifier to control a ZVS angle of the secondary active rectifier through a secondary ZVS angle closed loop; adjusting a phase-shift duty cycle of a primary inverter to control a ZVS angle of the primary inverter through the primary ZVS angle closed loop; determining the current operating case of the WPC system and adjusting the ZVS angles of the primary inverter and the secondary active rectifier to automatically identify an optimal operating point with a maximum charging efficiency through the P&O method.

Abstract: The present invention relates to a three-dimensional integrated package device for a high-voltage silicon carbide power module, comprising a source substrate, first chip submodules, a first driving terminal, a first driving substrate, a ceramic housing, a metal substrate, a water inlet, a water outlet, second chip submodules, a second driving terminal, a second driving substrate and a drain substrate from top to bottom; and each first chip submodule is composed of a driving connection substrate, a power source metal block, a first driving gate metal post, second driving gate metal posts, a silicon carbide bare chip, an insulation structure and the like. A three-dimensional integrated half-bridge structure is adopted to greatly reduce corresponding parasitic parameters.

Abstract: The present invention discloses a current phase locking and driver pulse generation method for wireless charging for electric vehicles. By monitoring the resonant current iL2 of the receiving coil, the proposed method generates the synchronization signal accurately based on the phase of the current iL2. Moreover, it controls the phases of driver pulses of switching transistors according to the synchronization signal so as to control the turn-on moment and turn-off moment of the switching transistors in the secondary rectifier. As a result, by using the proposed method, the pulse losing of the switching transistors in the secondary active rectifier can be avoided; the stable and reliable phase locking of the high-frequency resonant current and generation of driver pulses can be achieved; the anti-interference capability can be greatly enhanced, and the stability and reliability of the wireless charging system for electric vehicles can also be improved.

Abstract: A miniature fast charging and discharging circuit, including a power supply, a pre-stage boost auxiliary circuit, a bidirectional flyback circuit and an output capacitor. Input and output terminals of the pre-stage boost auxiliary circuit are respectively connected to the power supply and an input terminal of the bidirectional flyback circuit. The output capacitor is an output terminal of the bidirectional flyback circuit. The pre-stage boost auxiliary circuit includes a third switching MOSFET and a primary high-voltage storage capacitor connected in parallel with the power supply. When energy of the bidirectional flyback circuit reversely flows, the current cannot flow from the drain to the source, the current is stored in the primary high-voltage storage capacitor.

Abstract: A miniature fast charging and discharging circuit, including a power supply, a pre-stage boost auxiliary circuit, a bidirectional flyback circuit and an output capacitor. Input and output terminals of the pre-stage boost auxiliary circuit are respectively connected to the power supply and an input terminal of the bidirectional flyback circuit. The output capacitor is an output terminal of the bidirectional flyback circuit. The pre-stage boost auxiliary circuit includes a third switching MOSFET and a primary high-voltage storage capacitor connected in parallel with the power supply. When energy of the bidirectional flyback circuit reversely flows, the current cannot flow from the drain to the source, the current is stored in the primary high-voltage storage capacitor.