PFC integrated circuit compatible with multi-standard ac charging, control method, and onboard charger

Abstract

A PFC integrated circuit compatible with multi-standard AC charging, a control method, and an onboard charger. The PFC integrated circuit comprises an AC power source input port (100), a first contactor (S1) to a sixth contactor (S6), a first inductor (L1), a second inductor (L2), a third inductor (L3), and an AC / DC module (200), wherein the AC / DC module (200) comprises a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm and a first capacitor (C1), which are connected in parallel; the first contactor (S1) to the fourth contactor (S4) are configured to connect to the AC power source input port (100), and the first contactor (S1) to the third contactor (S3) are respectively connected to the first inductor (L1) to the third inductor (L3); a first end of the fifth contactor (S5) is connected to a first end of the first inductor (L1), and a second end of the fifth contactor (S5) is connected to a first end of the second inductor (L2); and a first end of the sixth contactor (S6) is connected to a first end of the third inductor (L3), and a second end of the sixth contactor (S6) is connected to a midpoint of the fourth bridge arm.

Description

PFC integrated circuit, control method and on-board charger compatible with multi-standard AC charging

[0001] This application claims priority to Chinese patent application No. 202311755666.3, filed on December 18, 2023, entitled “PFC integrated circuit, control method and on-board charger compatible with multi-standard AC charging,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of vehicle-mounted charger charging technology, and in particular to a PFC integrated circuit, a control method, and a vehicle-mounted charger compatible with multi-standard AC charging. Background Art

[0003] In recent years, with the continuous development and innovation of domestic new energy vehicle technology, product strength has gradually increased, and more and more technological fields have reached the international forefront. This has driven the internationalization of domestic electric vehicles. More and more domestic new energy vehicles have accelerated their export plans, gradually increasing their share of the global market and driving the globalization of new energy vehicles. Consequently, product development must comply with the standards and regulations of different countries, especially in the charging field. Currently, there are four main international AC (Alternating Current) charging standards: the Chinese standard, the European standard, the American standard, and the Japanese standard. Technical issues

[0004] However, faced with multiple charging standards and the requirements for vehicle platformization and universalization, existing PFC (Power Factor Correction) integrated circuits are not compatible with multiple charging standards, resulting in the non-universalization of on-board charging systems, increased vehicle development costs, and increased parts diversity. Technical Solutions

[0005] The purpose of the present invention is to provide a PFC integrated circuit, control method and on-board charger compatible with multi-standard AC charging, which can effectively achieve charging compatibility and ensure the universality of the on-board charging system, while effectively reducing the development cost of the entire vehicle and reducing the diversity of parts.

[0006] The present invention provides a PFC integrated circuit compatible with multi-standard AC charging. The PFC integrated circuit includes an AC power input port, a first contactor, a second contactor, a third contactor, a fourth contactor, a fifth contactor, a sixth contactor, a first inductor, a second inductor, a third inductor, and an AC / DC module. The AC / DC module includes a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm, and a first capacitor connected in parallel. The AC power input port includes a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal. The first input terminal is connected to the first terminal of the first contactor, the second terminal of the first contactor is connected to the first terminal of the first inductor, and the second terminal of the first inductor is connected to the midpoint of the first bridge arm. The second input terminal is connected to the first terminal of the second contactor. The first end of the second contactor is connected to the first end of the second inductor, and the second end of the second inductor is connected to the midpoint of the second bridge arm; the third input end is connected to the first end of the third contactor, the second end of the third contactor is connected to the first end of the third inductor, and the second end of the third inductor is connected to the midpoint of the third bridge arm; the fourth input end is connected to the first end of the fourth contactor, and the second end of the fourth contactor is connected to the midpoint of the fourth bridge arm; the first end of the fifth contactor is connected to the first end of the first inductor, and the second end of the fifth contactor is connected to the first end of the second inductor; the first end of the sixth contactor is connected to the first end of the third inductor, and the second end of the sixth contactor is connected to the midpoint of the fourth bridge arm.

[0007] Optionally, the PFC integrated circuit further includes a pre-charging resistor and a pre-charging contactor, wherein the pre-charging resistor is arranged between the first contactor and the first inductor, and the pre-charging contactor is connected in parallel to both ends of the pre-charging resistor.

[0008] Optionally, the PFC integrated circuit further includes an EMC filtering module, and the second end of the first contactor, the second end of the second contactor, the second end of the third contactor, and the second end of the fourth contactor are respectively connected to the first end of the first inductor, the first end of the second inductor, the first end of the third inductor, and the midpoint of the fourth bridge arm through the EMC filtering module.

[0009] Optionally, the first bridge arm includes a first switching tube and a second switching tube, the second bridge arm includes a third switching tube and a fourth switching tube, the third bridge arm includes a fifth switching tube and a sixth switching tube, and the fourth bridge arm includes a seventh switching tube and an eighth switching tube; the first end of the first switching tube, the first end of the third switching tube, the first end of the fifth switching tube, and the first end of the seventh switching tube are connected to form a first output end of the AC / DC module; the second end of the second switching tube, the second end of the fourth switching tube, the second end of the sixth switching tube, and the second end of the eighth switching tube are connected to form a second output end of the AC / DC module; the connection between the second end of the first switching tube and the first end of the second switching tube constitutes a midpoint of the first bridge arm; the connection between the second end of the third switching tube and the first end of the fourth switching tube constitutes a midpoint of the second bridge arm; the connection between the second end of the fifth switching tube and the first end of the sixth switching tube constitutes a midpoint of the third bridge arm; the connection between the second end of the seventh switching tube and the first end of the eighth switching tube constitutes a midpoint of the fourth bridge arm.

[0010] Optionally, the first to eighth switching tubes are power MOS tubes.

[0011] Optionally, components of the first bridge arm, the second bridge arm and the third bridge arm are all the same.

[0012] The present invention also provides a control method for a PFC integrated circuit compatible with multi-standard AC charging, the control method comprising: obtaining a charging standard for AC charging; according to the charging standard, controlling the closing or opening of the first contactor to the fourth contactor to access the AC power input port, controlling the closing or opening of the fifth contactor to select whether to reuse the second bridge arm, and controlling the closing or opening of the sixth contactor to select whether to reuse the fourth bridge arm.

[0013] Optionally, according to the charging standard, controlling the closing or disconnection of the first contactor to the fourth contactor to access the AC power input port, controlling the closing or disconnection of the fifth contactor to select whether to reuse the second bridge arm, and controlling the closing or disconnection of the sixth contactor to select whether to reuse the fourth bridge arm, includes: when the charging standard is national standard / European standard / American standard / Japanese standard single-phase AC charging, controlling the first contactor and the fourth contactor to close, and controlling the second contactor, the third contactor, the fifth contactor and the sixth contactor to disconnect, to enter a single-phase charging mode; when the charging standard is national standard / European standard three-phase AC charging, controlling the first contactor, the second contactor, the third contactor and the fourth contactor to close, and controlling the fifth contactor and the sixth contactor to disconnect, to enter a three-phase charging mode; when the charging standard is American standard / Japanese standard two-phase AC charging, controlling the first contactor to the sixth contactor to close, to enter a two-phase charging mode.

[0014] Optionally, the PFC integrated circuit also includes a pre-charging resistor and a pre-charging contactor, the pre-charging resistor is arranged between the first contactor and the first inductor, and the pre-charging contactor is connected in parallel at both ends of the pre-charging resistor. After obtaining the charging standard for AC charging, the method also includes: controlling the first contactor and the fourth contactor to close, controlling the pre-charging contactor to disconnect, and controlling the second contactor, the third contactor, the fifth contactor and the sixth contactor to disconnect for pre-charging; when the voltage of the first capacitor rises to the input voltage of the AC power input port, controlling the pre-charging contactor to close.

[0015] The present invention also provides an on-board charger, comprising the above-mentioned PFC integrated circuit compatible with multi-standard AC charging. Beneficial effects

[0016] The PFC integrated circuit, control method, and on-board charger compatible with multi-standard AC charging provided by the present invention can control the closing of corresponding contactors to access the AC power input port, control the closing or opening of the fifth contactor to select whether to reuse the second bridge arm, and control the closing or opening of the sixth contactor to select whether to reuse the fourth bridge arm according to charging standards such as European standards, national standards, American standards, and Japanese standards. This can effectively achieve charging compatibility, ensure the universality of the on-board charging system, and effectively reduce the development cost of the entire vehicle and reduce the diversity of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] FIG1 is a circuit diagram of a PFC integrated circuit compatible with multi-standard AC charging according to an embodiment of the present invention.

[0019] FIG2 is a circuit diagram of a PFC integrated circuit compatible with multi-standard AC charging according to an embodiment of the present invention during single-phase AC charging according to national / European / American / Japanese standards.

[0020] FIG3 is a circuit diagram of a PFC integrated circuit compatible with multi-standard AC charging according to an embodiment of the present invention during national standard / European standard three-phase AC charging.

[0021] FIG4 is a circuit diagram of a PFC integrated circuit compatible with multi-standard AC charging according to an embodiment of the present invention during US / Japanese standard two-phase AC charging.

[0022] FIG5 is a flow chart of a control method of a PFC integrated circuit compatible with multi-standard AC charging according to an embodiment of the present invention. Modes for Carrying Out the Invention

[0023] The aforementioned and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Through the description of the specific embodiments, a deeper and more specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are only for reference and illustration purposes and are not intended to limit the present invention. Some well-known parts may not be shown. In the various drawings, the same elements are represented by similar reference numerals. For the sake of clarity, the various parts in the drawings are not necessarily drawn strictly according to the actual scale.

[0024] It should be understood that the terms "first," "second," "third," "fourth," etc., are intended only to distinguish between components or circuits having similar properties, and do not indicate or imply relative importance or a particular order. The terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion, and may include, in addition to the listed elements, other elements not explicitly listed.

[0025] Figure 1 is a circuit diagram of a PFC integrated circuit compatible with multi-standard AC charging according to one embodiment of the present invention. This embodiment provides a PFC integrated circuit compatible with multi-standard AC charging. The PFC integrated circuit includes an AC power input port 100, a first contactor S1, a second contactor S2, a third contactor S3, a fourth contactor S4, a fifth contactor S5, a sixth contactor S6, a first inductor L1, a second inductor L2, a third inductor L3, and an AC / DC module 200. The AC / DC module 200 includes a first bridge arm, a second bridge arm, a third bridge arm, and a fourth bridge arm connected in parallel, and a first capacitor C1.

[0026] The AC power input port 100 includes a first input terminal 101, a second input terminal 102, a third input terminal 103, and a fourth input terminal 104; the first input terminal 101 is connected to the first end of the first contactor S1, the second end of the first contactor S1 is connected to the first end of the first inductor L1, and the second end of the first inductor L1 is connected to the midpoint of the first bridge arm; the second input terminal 102 is connected to the first end of the second contactor S2, the second end of the second contactor S2 is connected to the first end of the second inductor L2, and the second end of the second inductor L2 is connected to the midpoint of the second bridge arm; the third input terminal 103 is connected to the first end of the third contactor S3, the second end of the third contactor S3 is connected to the first end of the third inductor L3, and the second end of the third inductor L3 is connected to the midpoint of the third bridge arm; the fourth input terminal 104 is connected to the first end of the fourth contactor S4, and the second end of the fourth contactor S4 is connected to the midpoint of the fourth bridge arm.

[0027] Among them, the first end of the fifth contactor S5 is connected to the first end of the first inductor L1, and the second end of the fifth contactor S5 is connected to the first end of the second inductor L2; the first end of the sixth contactor S6 is connected to the first end of the third inductor L3, and the second end of the sixth contactor S6 is connected to the midpoint of the fourth bridge arm.

[0028] In one embodiment, as shown in FIG1 , the PFC integrated circuit further includes a pre-charging resistor R1 and a pre-charging contactor S7 . The pre-charging resistor R1 is disposed between the first contactor S1 and the first inductor L1 , and the pre-charging contactor S7 is connected in parallel to both ends of the pre-charging resistor R1 .

[0029] In one embodiment, as shown in FIG1 , the PFC integrated circuit further includes an EMC filter module 300. The second end of the first contactor S1, the second end of the second contactor S2, the second end of the third contactor S3, and the second end of the fourth contactor S4 are connected to the first end of the first inductor L1, the first end of the second inductor L2, the first end of the third inductor L3, and the midpoint of the fourth bridge arm, respectively, via the EMC filter module 300. The EMC filter module 300 can be connected to the AC power input port 100 via the first contactor S1, the second contactor S2, the third contactor S3, and the fourth contactor S4, and can filter noise at each input end of the AC power input port 100. The EMC filter module 300 typically comprises an LC low-pass filter circuit, whose primary function is to filter out unwanted signals above a specific frequency.

[0030] In one embodiment, as shown in FIG1 , the first bridge arm includes a first switch tube D1 and a second switch tube D2, the second bridge arm includes a third switch tube D3 and a fourth switch tube D4, the third bridge arm includes a fifth switch tube D5 and a sixth switch tube D6, and the fourth bridge arm includes a seventh switch tube D7 and an eighth switch tube D8; the first end of the first switch tube D1, the first end of the third switch tube D3, the first end of the fifth switch tube D5, and the first end of the seventh switch tube D7 are connected to form a first output end of the AC / DC module 200; the second end of the second switch tube D2, the second end of the fourth switch tube D4 The second end of the sixth switch tube D6 and the second end of the eighth switch tube D8 are connected to form the second output end of the AC / DC module 200; the connection between the second end of the first switch tube D1 and the first end of the second switch tube D2 constitutes the midpoint of the first bridge arm; the connection between the second end of the third switch tube D3 and the first end of the fourth switch tube D4 constitutes the midpoint of the second bridge arm; the connection between the second end of the fifth switch tube D5 and the first end of the sixth switch tube D6 constitutes the midpoint of the third bridge arm; and the connection between the second end of the seventh switch tube D7 and the first end of the eighth switch tube D8 constitutes the midpoint of the fourth bridge arm.

[0031] In one embodiment, as shown in Figure 1 , each switching transistor in the first to fourth bridge arms is provided with a diode, which is connected in antiparallel to both ends of the switching transistor. For example, the anode of the diode is connected to the emitter or source of the switching transistor, and the cathode of the diode is connected to the collector or drain of the switching transistor. In one embodiment, each switching transistor and its corresponding diode are integrated into a single structure to facilitate circuit wiring.

[0032] In one embodiment, the first through eighth switching transistors D1 through D8 are power MOS transistors. Power MOS transistors offer advantages such as fast switching speed, low power consumption, high stability, and low noise. However, the present invention is not limited thereto. The first through eighth switching transistors D1 through D8 may also be other types of switching transistors, such as IGBTs.

[0033] In one embodiment, the components of the first, second, and third bridge arms are identical. The midpoints of the first, second, and third bridge arms are connected to the first, second, and third inductors L1, L2, and L3, respectively. This allows the first, second, and third bridge arms in the AC / DC module 200 to be driven in a three-phase interleaved manner. This results in symmetrical operation of the inductors, further facilitating magnetic integration of the inductors and further reducing overall size and cost. Furthermore, the identical components of the first, second, and third bridge arms simplify the design and manufacture of the AC / DC circuit, reducing costs.

[0034] In one embodiment, the first capacitor C1 may be configured as an X-capacitor, which can be used to stabilize direct current and resist electromagnetic interference from the power supply.

[0035] In one embodiment, the AC / DC module 200 is a bidirectional AC / DC circuit. The AC / DC module can be used for inverter output, that is, to convert the DC power generated by the vehicle's power battery into AC power, which can be output to the AC power input port 100 through a corresponding inductor to provide AC power to another PFC integrated circuit for external discharge, such as for charging other vehicles.

[0036] Specifically, the PFC integrated circuit of this embodiment can be used to be compatible with multi-standard AC charging and can be driven by a controller according to a control strategy. Specifically, the charging standard is first obtained for AC charging, and then, based on the charging standard, the first contactor S1 to the fourth contactor S4 are controlled to be closed or opened to connect to the AC power input port 100, the fifth contactor S5 is controlled to be closed or opened to select whether to reuse the second bridge arm, and the sixth contactor S6 is controlled to be closed or opened to select whether to reuse the fourth bridge arm, thereby entering the corresponding charging mode. The following, in conjunction with Figures 2 to 4, illustrates the control strategy of the PFC integrated circuit of one embodiment that is compatible with AC charging of different standards, as follows:

[0037] (1) When the vehicle is charged with single-phase AC of national standard / European standard / American standard / Japanese standard, pre-charging can be performed first, that is, the first contactor S1 and the fourth contactor S4 are controlled to be closed, the pre-charging contactor S7 is controlled to be disconnected, and the second contactor S2, the third contactor S3, the fifth contactor S5 and the sixth contactor S6 are controlled to be disconnected. When the voltage of the first capacitor C1 rises to the input voltage of the AC power input port 100, the pre-charging contactor S7 is controlled to be closed. As shown in FIG2 , the first contactor S1 and the fourth contactor S4 are controlled to be closed, and the second contactor S2, the third contactor S3, the fifth contactor S5 and the sixth contactor S6 are controlled to be disconnected, entering the single-phase charging mode, and finally realizing AC single-phase charging. That is, the first input terminal 101 of the AC power input port 100 is used for the phase line voltage, and the fourth input terminal 104 is used for the neutral line. Single-phase drive is performed only through the first bridge arm, realizing single-phase AC charging of national standard / European standard / American standard / Japanese standard.

[0038] (2) When the vehicle is charged with national standard / European standard three-phase AC, pre-charging can be performed first, that is, the first contactor S1 and the fourth contactor S4 are controlled to be closed, the pre-charging contactor S7 is controlled to be disconnected, and the second contactor S2, the third contactor S3, the fifth contactor S5 and the sixth contactor S6 are controlled to be disconnected. When the voltage of the first capacitor C1 rises to the input voltage of the AC power input port 100, the pre-charging contactor S7 is controlled to be closed. As shown in FIG3 , the first contactor S1, the second contactor S2, the third contactor S3 and the fourth contactor S4 are controlled to be closed, and the fifth contactor S5 and the sixth contactor S6 are controlled to be disconnected, and finally AC single-phase charging is achieved. That is, the first input terminal 101, the second input terminal 102 and the third input terminal 103 of the AC power input port 100 can be used for three phase line voltages respectively, and the first bridge arm to the third bridge arm are driven in three-phase staggered manner to achieve national standard / European standard three-phase AC charging.

[0039] (3) When the vehicle is charged with two-phase AC of American standard / Japanese standard, pre-charging can be performed first, that is, the first contactor S1 and the fourth contactor S4 are controlled to be closed, the pre-charging contactor S7 is controlled to be disconnected, and the second contactor S2, the third contactor S3, the fifth contactor S5 and the sixth contactor S6 are controlled to be disconnected. When the voltage of the first capacitor C1 rises to the input voltage of the AC power input port 100, the pre-charging contactor S7 is controlled to be closed. As shown in FIG4 , the first contactor S1 to the sixth contactor S6 are controlled to be closed, and finally the AC American standard / Japanese standard 80A charging is realized. That is, the second bridge arm and the fourth bridge arm are reused, the first input terminal 101 and the second input terminal 102 of the AC power input port 100 can be used for one phase line voltage, and the third input terminal 103 and the fourth input terminal 104 of the AC power input port 100 can be used for the other phase line voltage. The two-phase drive is performed through the first bridge arm to the fourth bridge arm to realize the two-phase AC charging of American standard / Japanese standard.

[0040] Therefore, based on the above-mentioned AC charging control strategy, the PFC integrated circuit can implement different control strategies according to the AC charging standards of different countries, ensure charging compatibility, realize the universalization and platformization of on-board charger products, and effectively reduce the development cost of the entire vehicle.

[0041] FIG5 is a flow chart of a control method for a PFC integrated circuit compatible with multi-standard AC charging according to an embodiment of the present invention. As shown in FIG5 , an embodiment of the present invention further provides a control method for a PFC integrated circuit compatible with multi-standard AC charging, including:

[0042] S100, obtaining a charging standard for AC charging;

[0043] S200, according to the charging standard, controls the closing or opening of the first contactor S1 to the fourth contactor S4 to connect to the AC power input port 100, controls the closing or opening of the fifth contactor S5 to select whether to reuse the second bridge arm, and controls the closing or opening of the sixth contactor S6 to select whether to reuse the fourth bridge arm.

[0044] In one embodiment, according to the charging standard, controlling the closing or opening of the first to fourth contactors S1 to S4 to connect to the AC power input port 100, controlling the closing or opening of the fifth contactor S5 to select whether to reuse the second bridge arm, and controlling the closing or opening of the sixth contactor S6 to select whether to reuse the fourth bridge arm include:

[0045] When the charging standard is single-phase AC charging of the national standard / European standard / American standard / Japanese standard, the first contactor S1 and the fourth contactor S4 are controlled to be closed, and the second contactor S2, the third contactor S3, the fifth contactor S5 and the sixth contactor S6 are controlled to be disconnected, entering the single-phase charging mode;

[0046] When the charging standard is national / European standard three-phase AC charging, the first contactor S1, the second contactor S2, the third contactor S3 and the fourth contactor S4 are controlled to be closed, and the fifth contactor S5 and the sixth contactor S6 are controlled to be disconnected, entering the three-phase charging mode;

[0047] When the charging standard is US / Japanese two-phase AC charging, the first contactor S1 to the sixth contactor S6 are controlled to be closed, entering the two-phase charging mode.

[0048] In one embodiment, the PFC integrated circuit further includes a pre-charging resistor R1 and a pre-charging contactor S7. The pre-charging resistor R1 is arranged between the first contactor S1 and the first inductor L1, and the pre-charging contactor S7 is connected in parallel at both ends of the pre-charging resistor R1. After obtaining the charging standard for AC charging, the method further includes: controlling the first contactor S1 and the fourth contactor S4 to be closed, controlling the pre-charging contactor S7 to be disconnected, and controlling the second contactor S2, the third contactor S3, the fifth contactor S5, and the sixth contactor S6 to be disconnected for pre-charging; when the voltage of the first capacitor C1 rises to the input voltage of the AC power input port 100, controlling the pre-charging contactor S7 to be closed.

[0049] The implementation of the control method of the PFC integrated circuit compatible with multi-standard AC charging of this embodiment can refer to the above-mentioned embodiment of the PFC integrated circuit compatible with multi-standard AC charging, and the repeated parts are not repeated here.

[0050] Based on the same inventive concept, embodiments of the present invention further provide an on-board charger, including the aforementioned multi-standard AC charging-compatible PFC integrated circuit provided in embodiments of the present invention. The implementation of this on-board charger can be referenced to the aforementioned multi-standard AC charging-compatible PFC integrated circuit embodiments, and any repetitive details will not be repeated. Industrial Applicability

[0051] According to charging standards such as European standards, national standards, American standards, and Japanese standards, the corresponding contactors can be controlled to close to connect to the AC power input port 100, the fifth contactor S5 can be controlled to be closed or opened to select whether to reuse the second bridge arm, and the sixth contactor S6 can be controlled to be closed or opened to select whether to reuse the fourth bridge arm. This can effectively achieve charging compatibility, ensure the universality of the on-board charging system, and effectively reduce the development cost of the entire vehicle and reduce the diversity of parts.

Claims

1. A PFC integrated circuit compatible with multi-standard AC charging, characterized in that: The AC / DC module comprises an AC power input port, a first contactor, a second contactor, a third contactor, a fourth contactor, a fifth contactor, a sixth contactor, a first inductor, a second inductor, a third inductor and an AC / DC module, wherein the AC / DC module comprises a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm and a first capacitor connected in parallel; The AC power input port includes a first input terminal, a second input terminal, a third input terminal and a fourth input terminal; the first input terminal is connected to the first end of the first contactor, the second end of the first contactor is connected to the first end of the first inductor, and the second end of the first inductor is connected to the midpoint of the first bridge arm; the second input terminal is connected to the first end of the second contactor, the second end of the second contactor is connected to the first end of the second inductor, and the second end of the second inductor is connected to the midpoint of the second bridge arm; the third input terminal is connected to the first end of the third contactor, the second end of the third contactor is connected to the first end of the third inductor, and the second end of the third inductor is connected to the midpoint of the third bridge arm; the fourth input terminal is connected to the first end of the fourth contactor, and the second end of the fourth contactor is connected to the midpoint of the fourth bridge arm; The first end of the fifth contactor is connected to the first end of the first inductor, and the second end of the fifth contactor is connected to the first end of the second inductor; the first end of the sixth contactor is connected to the first end of the third inductor, and the second end of the sixth contactor is connected to the midpoint of the fourth bridge arm.

2. The PFC integrated circuit compatible with multi-standard AC charging according to claim 1, characterized in that: It also includes a pre-charging resistor and a pre-charging contactor. The pre-charging resistor is arranged between the first contactor and the first inductor, and the pre-charging contactor is connected in parallel to both ends of the pre-charging resistor.

3. The PFC integrated circuit compatible with multi-standard AC charging according to claim 1, characterized in that: An EMC filter module is also included, and the second end of the first contactor, the second end of the second contactor, the second end of the third contactor and the second end of the fourth contactor are respectively connected to the first end of the first inductor, the first end of the second inductor, the first end of the third inductor and the midpoint of the fourth bridge arm through the EMC filter module.

4. The PFC integrated circuit compatible with multi-standard AC charging according to claim 1, characterized in that: The first bridge arm includes a first switch tube and a second switch tube, the second bridge arm includes a third switch tube and a fourth switch tube, the third bridge arm includes a fifth switch tube and a sixth switch tube, and the fourth bridge arm includes a seventh switch tube and an eighth switch tube; the first end of the first switch tube, the first end of the third switch tube, the first end of the fifth switch tube and the first end of the seventh switch tube are connected to form a first output end of the AC / DC module; the second end of the second switch tube, the second end of the fourth switch tube, the second end of the sixth switch tube and the second end of the eighth switch tube are connected to form a second output end of the AC / DC module; the connection between the second end of the first switch tube and the first end of the second switch tube constitutes a midpoint of the first bridge arm; the connection between the second end of the third switch tube and the first end of the fourth switch tube constitutes a midpoint of the second bridge arm; the connection between the second end of the fifth switch tube and the first end of the sixth switch tube constitutes a midpoint of the third bridge arm; the connection between the second end of the seventh switch tube and the first end of the eighth switch tube constitutes a midpoint of the fourth bridge arm.

5. The PFC integrated circuit compatible with multi-standard AC charging according to claim 4, characterized in that: The first to eighth switch tubes are power MOS tubes.

6. The PFC integrated circuit compatible with multi-standard AC charging according to claim 1, characterized in that: The components of the first bridge arm, the second bridge arm and the third bridge arm are all the same.

7. A control method for a PFC integrated circuit compatible with multi-standard AC charging, applied to the PFC integrated circuit compatible with multi-standard AC charging as claimed in claim 1, characterized in that: The control method comprises: Get charging standards for AC charging; According to the charging standard, the first contactor to the fourth contactor are controlled to be closed or opened to access the AC power input port, the fifth contactor is controlled to be closed or opened to select whether to reuse the second bridge arm, and the sixth contactor is controlled to be closed or opened to select whether to reuse the fourth bridge arm.

8. The control method according to claim 7, characterized in that: According to the charging standard, controlling the closing or opening of the first contactor to the fourth contactor to access the AC power input port, controlling the closing or opening of the fifth contactor to select whether to reuse the second bridge arm, and controlling the closing or opening of the sixth contactor to select whether to reuse the fourth bridge arm, comprises: When the charging standard is single-phase AC charging of the national standard / European standard / American standard / Japanese standard, the first contactor and the fourth contactor are controlled to be closed, and the second contactor, the third contactor, the fifth contactor and the sixth contactor are controlled to be disconnected to enter the single-phase charging mode; When the charging standard is national standard / European standard three-phase AC charging, the first contactor, the second contactor, the third contactor and the fourth contactor are controlled to be closed, and the fifth contactor and the sixth contactor are controlled to be disconnected to enter the three-phase charging mode; When the charging standard is American standard / Japanese standard two-phase AC charging, the first contactor to the sixth contactor are controlled to be closed to enter a two-phase charging mode.

9. The control method according to claim 7, characterized in that: The PFC integrated circuit further includes a pre-charging resistor and a pre-charging contactor, the pre-charging resistor is arranged between the first contactor and the first inductor, the pre-charging contactor is connected in parallel to both ends of the pre-charging resistor, and after obtaining the charging standard for AC charging, the method further includes: controlling the first contactor and the fourth contactor to close, controlling the pre-charging contactor to open, and controlling the second contactor, the third contactor, the fifth contactor and the sixth contactor to open, so as to perform pre-charging; When the voltage of the first capacitor rises to the input voltage of the AC power input port, the pre-charging contactor is controlled to close.

10. A vehicle charger, characterized in that: A PFC integrated circuit compatible with multi-standard AC charging comprising any one of claims 1-6.

Images