Portable chargers having power factor correction capability for use with electric vehicles

• US 7,598,703 B2
• Filed: 12/29/2006
• Issued: 10/06/2009
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited
• Inventors: Niu, Kaihua, Zhang, JianHua, Guo, Bin
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US11/648,246
• Publication Number:
  US 20070153560A1
• Time in Patent Office: 1,012 Days
• Field of Search: 320/107, 320/112, 320/141, 320/161
• US Class Current: 320/107
• CPC Class Codes: B60L 2210/12 Buck converters
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/302 Cooling of charging equipment
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02M 1/4225 using a non-isolated boost converter
• CPC Class Codes: H02P 2201/11 Buck converter, i.e. DC-DC step down converter decreasing the voltage between the supply and the inverter driving the motor general aspects of plural converters in cascade H02M
• CPC Class Codes: H02P 2201/15 Power factor Correction [PFC] circuit generating the DC link voltage for motor driving inverter motor power factor control H02P23/26
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A type of portable chargers with power factor correction capability for use with electric vehicles comprises of a filtering rectifier module, an integrated circuit power supply module, a DC-DC PFC module and a DC-DC BUCK module. The filtering rectifier module has one input port and two output ports. The IC power supply module has one input port and two output ports. The DC-DC PFC module has two input ports and one output port. The DC-DC BUCK module has two input ports and one output port. The two output ports of the filtering rectifier module are connected to the input port of IC power supply module and the input port of the DC-DC PFC module respectively. The output port of the DC-DC PFC module is connected to one of the input ports of the DC-DC BUCK module. The two output ports of IC power supply module are connected, respectively, to the other input port of the DC-DC PFC module and to the other input port of the DC-DC BUCK module. This new type of portable chargers embodied with this invention can effectively reduce reactive power in the power system and develop greater power.

Claims

1. A portable charger having power factor correction capability for use with electric vehicles, comprising:

a filtering rectifier module, a chip power supply module, a DC-DC power factor correction (“

PFC”

) module, and a DC-DC BUCK module, wherein the filtering rectifier module has one input port and two output ports;

the chip power supply module has one input port and two output ports;

the DC-DC PFC module has two input ports and one output port;

the DC-DC BUCK module has two input ports and one output port;

the two output ports of the filtering rectifier module are connected to the input port of the chip power supply module and the input port of the DC-DC PFC module, respectively;

the output port of the DC-DC PFC module is connected to one of the input ports of the DC-DC BUCK module;

the two output ports of the chip power supply module are connected, respectively, to the other input port of the DC-DC PFC module and to the other input port of the DC-DC BUCK module.

2. The portable charger of claim 1, wherein, the chip power supply module comprises an isolation transformer that converts the received signals to at least two-way constant voltage signals.

3. The portable charger of claims 1, wherein the DC-DC PFC module comprises a PFC module control circuit and a PFC circuit corresponding to the control circuit;

the PFC circuit has both positive and negative electrodes that incept filtering rectifier module output;

the PFC circuit has a MOS switch Q1, divider resistors R1 and R2, a voltage sampling resistor Rs1, a charging capacitor C1, an inductor L1 and a diode D1;

the drain of the MOS switch is connected to positive electrode of the PFC circuit via inductor L1 and is connected to the anode of the diode D1;

the cathode of diode D1 is connected to serial resistors R1, R2 and voltage sampling resistor Rs1, which is connected to the negative electrode of the PFC circuit;

the source of MOS switch Q1 is connected to the negative electrode of PFC circuit via voltage sampling resistor Rs1;

the gate of MOS switch Q1 incepts the output signals from the control circuit of PFC module;

the voltage obtained with voltage division formulas of series resistors R1 and R2 is introduced to the control circuit of PFC module;

the negative electrode of PFC circuit is connected to the control circuit of PFC module as the signal input port;

the charging capacitor C1 is parallel to R1 and R2.

4. The portable charger of claims 1, wherein the DC-DC BUCK module comprises a BUCK module control circuit and a BUCK circuit corresponding to the control circuit;

the BUCK circuit has positive and negative nodes to incept the output of PFC circuit;

the BUCK circuit comprises a filtering capacitor C2, a diode D2, a MOS switch Q2, an inductor L2, resistors R3 and R4, a voltage sampling resistor Rs1 and a charging capacitor C3;

the filtering capacitor C2 is connected to positive and negative electrodes of the BUCK circuit;

the drain of said MOS switch is connected to the positive electrode of the BUCK circuit;

the source is connected to inductor L2 and the cathode of diode D2;

the gate is connected to the BUCK module control circuit;

the inductor L2 is connected to resistors R3, R4 and voltage sampling resistor Rs1, which is connected to the negative electrode of the BUCK circuit;

the anode of diode D2 is connected to the negative electrode of BUCK circuit;

the voltage obtained with voltage division formulas of series resistors R1 and R2 is introduced to the BUCK module control circuit;

the signals after Rs2 are introduced to the BUCK module control circuit from the negative electrode of BUCK circuit; and

the charging capacitor C3 is parallel to resistors R3 and R4.