High-power USB charging module for vehicles

Abstract

This invention provides a high-power in-vehicle USB charging module, comprising a first charging circuit, a second charging circuit, a first USB interface, and a second USB interface. The first charging circuit includes a first DC-DC boost / buck circuit and a first charging protocol control circuit. The first DC-DC boost / buck circuit performs DC-DC conversion on the in-vehicle DC input power VBAT received at its input terminal Vin to obtain a first DC power supply VBUS1 provided to the first USB interface. The first charging protocol control circuit is connected to the first DC-DC boost / buck circuit. The second charging circuit includes a second DC-DC boost / buck circuit and a second charging protocol control circuit. The first USB interface is connected to both the first DC-DC boost / buck circuit and the first charging protocol control circuit. The second USB interface is connected to both the second DC-DC boost / buck circuit and the second charging protocol control circuit. Thus, it supports not only standard charging protocols but also proprietary charging protocols.

Description

[Technical Field]

[0001] This invention relates to the field of vehicle charging technology, and in particular to a high-power vehicle-mounted USB charging module. [Background Technology]

[0002] Nowadays, people are highly dependent on electronic products such as mobile phones, tablets, and laptops. While these products bring great convenience, they also cause battery anxiety. People have higher demands for faster phone charging speeds, making high-power charging devices extremely valuable for research and development.

[0003] Most high-power USB charging modules for vehicles currently on the market use relatively simple chips, with separate PD control and BUCK-BOOST chips, resulting in poor integration and a loss of cost advantage. Current high-power USB charging modules for vehicles use the PD protocol to charge mobile phones and cannot provide the maximum charging power for proprietary protocols.

[0004] Therefore, it is necessary to propose an improved technical solution to address the above problems. [Summary of the Invention]

[0005] One of the objectives of this invention is to provide a high-power USB charging module for vehicles that supports not only standard charging protocols but also proprietary charging protocols, thereby meeting the high-power charging requirements of the vast majority of mobile phones on the market and greatly alleviating people's anxiety about low battery levels and slow charging speeds.

[0006] According to one aspect of the present invention, a vehicle-mounted high-power USB charging module is provided, comprising a first charging circuit, a second charging circuit, a first USB interface, and a second USB interface. The first charging circuit includes a first DC-DC boost / buck circuit and a first charging protocol control circuit. The first DC-DC boost / buck circuit is used to perform DC-DC conversion on the vehicle-mounted DC input power VBAT received at its input terminal Vin to obtain a first DC power supply VBUS1 provided to the first USB interface. The first charging protocol control circuit is connected to the first DC-DC boost / buck circuit and controls the first DC-DC boost / buck circuit to charge the device to be charged via the first USB interface based on a standard charging protocol or a proprietary charging protocol. The second charging circuit includes... The device includes a second DC-DC boost / buck circuit and a second charging protocol control circuit. The second DC-DC boost / buck circuit performs DC-DC conversion on the on-board DC input power VBAT received at its input terminal Vin to obtain a second DC power supply VBUS2 provided to the second USB interface. The second charging protocol control circuit is connected to the second DC-DC boost / buck circuit and the first charging protocol control circuit, and controls the second DC-DC boost / buck circuit to charge the device to be charged through the second USB interface based on a standard charging protocol or a proprietary charging protocol. The first USB interface is connected to the first DC-DC boost / buck circuit and the first charging protocol control circuit. The second USB interface is connected to the second DC-DC boost / buck circuit and the second charging protocol control circuit.

[0007] Compared with the prior art, the present invention can provide a large charging power for devices that support proprietary charging protocols or support standard charging protocols when used with a single port; when used with two ports, it can provide a large charging power for two devices simultaneously, thereby meeting the high-power charging requirements of most mobile phones on the market and greatly alleviating people's anxiety about low battery and slow charging speed. [Attached Image Description]

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0009] Figure 1 This is a circuit diagram of a vehicle-mounted high-power USB charging module in one embodiment of the present invention;

[0010] Figure 2 For example, in one embodiment of the present invention Figure 1The circuit diagram shown is of the input protection and filtering circuit.

[0011] Figure 3 This is a circuit diagram of the CPSQ5206_A chip and its peripheral circuits in one embodiment of the present invention;

[0012] Figure 4 This is a circuit diagram of the CPSQ5206_B chip and its peripheral circuitry in one embodiment of the present invention;

[0013] Figure 5 This is a circuit diagram of the CPSQ8841_A chip and its peripheral circuits in one embodiment of the present invention;

[0014] Figure 6 This is a circuit diagram of the CPSQ8841_B chip and its peripheral circuitry in one embodiment of the present invention;

[0015] Figure 7 For example, in one embodiment of the present invention Figure 1 The circuit diagram of the input interface circuit shown is shown.

[0016] Figure 8 For example, in one embodiment of the present invention Figure 1 The circuit diagram of the first USB interface is shown.

[0017] Figure 9 For example, in one embodiment of the present invention Figure 1 The circuit diagram of the second USB interface is shown.

Detailed Implementation Methods

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. Unless otherwise specified, the terms coupling, connection, linking, and interconnection used herein to indicate electrical connection mean direct or indirect connection. For example, A being connected to B includes both a direct electrical connection between A and B and a connection between A and B via electrical components or circuits.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Please refer to Figure 1 As shown, it is a circuit diagram of a vehicle-mounted high-power USB charging module in one embodiment of the present invention. Figure 1 The vehicle-mounted high-power USB charging module shown includes a first charging circuit 110, a second charging circuit 120, a first USB interface 130, and a second USB interface 140.

[0022] The first charging circuit 110 includes a first DC-DC boost / buck circuit 112 and a first charging protocol control circuit 114. The first DC-DC boost / buck circuit 112 is used to perform DC-DC conversion on the vehicle DC input power VBAT received at its input terminal Vin to obtain a first DC power VBUS1 provided to the first USB interface 130. The first charging protocol control circuit 114 is connected to the first DC-DC boost / buck circuit 112 and controls the first DC-DC boost / buck circuit 112 to charge the device to be charged through the first USB interface 130 based on a standard charging protocol or a proprietary charging protocol.

[0023] The second charging circuit 120 includes a second DC-DC boost / buck circuit 122 and a second charging protocol control circuit 124. The second DC-DC boost / buck circuit 122 is used to perform DC-DC conversion on the on-board DC input power VBAT received at its input terminal Vin to obtain a second DC power supply VBUS2 provided to the second USB interface 140. The second charging protocol control circuit 124 is connected to the second DC-DC boost / buck circuit 122 and the first charging protocol control circuit 114. It controls the second DC-DC boost / buck circuit 122 to charge the device to be charged through the second USB interface 140 based on a standard charging protocol or a proprietary charging protocol.

[0024] The first USB interface 130 is connected to the first DC-DC step-up / step-down circuit 112 and the first charging protocol control circuit 114; the second USB interface 140 is connected to the second DC-DC step-up / step-down circuit 122 and the second charging protocol control circuit 124.

[0025] exist Figure 1In the specific embodiment shown, the first DC-DC buck-boost circuit 112 includes a CPSQ5206_A chip (which is a DC-DC buck-boost chip). The CPSQ5206_A chip, together with four external PMOS transistors (or MOS transistors), constitutes a BUCK-BOOST circuit (i.e., the first DC-DC buck-boost circuit 112). Please refer to [link to documentation] for details. Figure 3 The diagram shows a schematic of the CPSQ5206_A chip and its peripheral circuitry in one embodiment of the present invention. The first charging protocol control circuit 114 includes a CPSQ8841_A chip (which is a charging protocol control chip). The CPSQ8841_A chip is connected to the corresponding pin of the first USB interface 130. For details, please refer to [link to relevant documentation]. Figure 5 The diagram shows a schematic of the CPSQ8841_A chip and its peripheral circuitry in one embodiment of the present invention. The second DC-DC buck-boost circuit 122 includes a CPSQ5206_B chip (which is a DC-DC buck-boost chip). The CPSQ5206_B chip, together with four external PMOS transistors (or MOS transistors), forms a BUCK-BOOST circuit (i.e., the second DC-DC buck-boost circuit 122). For details, please refer to [link to documentation]. Figure 4 As shown, this is a circuit diagram of the CPSQ5206_B chip and its peripheral circuits in one embodiment of the present invention; the second charging protocol control circuit 124 includes a CPSQ8841_B chip (which is a charging protocol control chip), and the CPSQ8841_B chip is connected to the corresponding pin of the second USB interface 140. For details, please refer to [link to relevant documentation]. Figure 6 As shown, it is a circuit diagram of the CPSQ8841_B chip and its peripheral circuit in one embodiment of the present invention; the CPSQ8841_A chip and the CPSQ8841_B chip are connected for communication via the I2C bus signal lines SCL\SDA.

[0026] exist Figure 1In the specific embodiment shown, the CC11, CC12, DP1, and DM1 pins of the first USB interface 130 are respectively connected to the corresponding pins of the first charging protocol control circuit 114 (or the CPSQ8841_A chip); the CC21, CC22, DP2, and DM2 pins of the second USB interface 140 are respectively connected to the corresponding pins of the second charging protocol control circuit 124 (or the CPSQ8841_B chip); the first charging protocol control circuit 114 (or the CPSQ8841_A chip) supports the PD protocol as the standard charging protocol and Huawei's proprietary protocol as the proprietary protocol; the second charging protocol control circuit 124 (or the CPSQ8841_B chip) supports the PD protocol as the standard charging protocol and Huawei's proprietary protocol as the proprietary protocol; in other words, the CPSQ8841 chip is a Huawei proprietary protocol & PD protocol control circuit or chip. Both the first USB interface 130 and the second USB interface 140 are USB Type-C interfaces; please refer to [link to relevant documentation] for details. Figure 8 As shown, this is one embodiment of the present invention. Figure 1 The circuit diagram of the first USB interface 130 shown is in... Figure 8 In the illustrated embodiment, ESD diodes are placed to protect DP, DM, CC1, and CC2 in the first USB interface 130; please refer to [link to documentation] for details. Figure 9 As shown, this is one embodiment of the present invention. Figure 1 The circuit diagram of the second USB interface 140 shown is in... Figure 9 In the embodiment shown, DP, DM, CC1 and CC2 in the second USB interface 140 are all protected by ESD diodes.

[0027] exist Figure 1In the illustrated embodiment, the first charging circuit 110 further includes a transistor Q1. The detection terminal of the first charging protocol control circuit 114 (or the CPSQ8841_A chip) is connected to the first DC power supply VBUS1 provided by the first DC boost / buck circuit 112. Its first control terminal is connected to the control terminal of the transistor Q1. The first connection terminal of the transistor Q1 is connected to the first DC power supply VBUS1. The second connection terminal of the transistor Q1 is connected to the FB pin of the first DC boost / buck circuit 112 (or the CPSQ5206_A chip). The first charging protocol control circuit 114 (or the CPSQ8841_A chip) outputs a corresponding control signal to the control terminal of the transistor Q1 based on the voltage of the first DC power supply VBUS1 detected by its detection terminal, so as to adjust the first DC power supply VBUS1 output by the first DC boost / buck circuit 112. In other words, the CPSQ8841_A chip regulates the voltage of the FB pin of the CPSQ5206_A chip through a transistor Q1, thereby regulating the output voltage of the CPSQ5206_A chip. The output current can be adjusted up to 8A in 50mA steps (with a 5mΩ output current sensing resistor). The second charging circuit 120 also includes a transistor Q2. The detection terminal of the second charging protocol control circuit 124 (or CPSQ8841_B chip) is connected to the second DC power supply VBUS2 provided by the second DC boost / buck circuit 122. Its first control terminal is connected to the control terminal of the transistor Q2. The first connection terminal of the transistor Q2 is connected to the second DC power supply VBUS2. The second connection terminal of the transistor Q2 is connected to the FB pin of the second DC boost / buck circuit 122 (or CPSQ5206_B chip). The second charging protocol control circuit 124 (or CPSQ8841_B chip) outputs a corresponding control signal to the control terminal of the transistor Q2 based on the voltage of the second DC power supply VBUS2 detected by its detection terminal, so as to adjust the second DC power supply VBUS2 output by the second DC boost / buck circuit 122. In other words, the CPSQ8841_B chip regulates the voltage of the FB pin of the CPSQ5206_B chip through a transistor Q2, thereby regulating the output voltage of the CPSQ5206_B chip. The output current can be adjusted up to 8A in 50mA steps (with a 5mΩ output current sensing resistor).

[0028] exist Figure 1 In the specific embodiment shown, transistor Q1 is a PNP transistor, and the first connection terminal, the second connection terminal, and the control terminal of transistor Q1 are the emitter, collector, and base of the PNP transistor, respectively; transistor Q2 is a PNP transistor, and the first connection terminal, the second connection terminal, and the control terminal of transistor Q2 are the emitter, collector, and base of the PNP transistor, respectively.

[0029] exist Figure 1In the illustrated embodiment, the first charging circuit 110 further includes a first switch K1, which is connected between the first DC power supply VBUS1 provided by the first DC-DC boost / buck circuit 112 and the VBUS1 pin of the first USB interface 130. The control terminal of the first switch K1 is connected to the second control terminal of the CPSQ8841_A chip, and the CPSQ8841_A chip controls the first switch K1 to be turned on or off. The second charging circuit 120 further includes a second switch K2, which is connected between the second DC power supply VBUS2 provided by the second DC-DC boost / buck circuit 122 and the VBUS2 pin of the second USB interface 140. The control terminal of the second switch K2 is connected to the second control terminal of the CPSQ8841_B chip, and the CPSQ8841_B chip controls the second switch K2 to be turned on or off.

[0030] The following is a detailed introduction Figure 1 The working principle of the in-vehicle high-power USB charging module shown is illustrated.

[0031] When the vehicle-mounted high-power USB charging module detects that only the first USB port 130 is connected to a device to be charged, it continues to detect whether the device to be charged supports a proprietary charging protocol (e.g., Huawei mobile phone proprietary charging protocol). If yes, the first charging protocol control circuit 114 (e.g., CPSQ8841_A chip) controls the first DC-DC boost / buck circuit 112 (e.g., CPSQ5206_A chip) to charge the device to be charged (e.g., mobile phone) through the first USB port 130 based on the proprietary charging protocol. If no, the first charging protocol control circuit 114 (e.g., CPSQ8841_A chip) controls the first DC-DC boost / buck circuit 112 (e.g., CPSQ5206_A chip) to charge the device to be charged (e.g., mobile phone) through the first USB port 130 based on a standard charging protocol (e.g., PD protocol).

[0032] When the vehicle-mounted high-power USB charging module detects that only the second USB port 140 is connected to a device to be charged, it continues to detect whether the device to be charged supports a proprietary charging protocol (e.g., Huawei mobile phone proprietary charging protocol). If yes, the second charging protocol control circuit 124 (e.g., CPSQ8841_B chip) controls the second DC-DC boost / buck circuit 122 (e.g., CPSQ5206_B chip) to charge the device to be charged (e.g., mobile phone) through the second USB port 140 based on the proprietary charging protocol. If no, the second charging protocol control circuit 124 (e.g., CPSQ8841_B chip) controls the second DC-DC boost / buck circuit 122 (e.g., CPSQ5206_B chip) to charge the device to be charged (e.g., mobile phone) through the second USB port 140 based on a standard charging protocol (e.g., PD protocol).

[0033] When the vehicle-mounted high-power USB charging module detects that both the first USB port 130 and the second USB port 140 are connected to devices to be charged (e.g., mobile phones), the first charging protocol control circuit 114 (e.g., CPSQ8841_A chip) controls the first DC-DC boost / buck circuit 112 (e.g., CPSQ5206_A chip) to charge the devices to be charged (e.g., mobile phones) through the first USB port 130; at the same time, the second charging protocol control circuit 124 (e.g., CPSQ8841_B chip) controls the second DC-DC boost / buck circuit 122 (e.g., CPSQ5206_B chip) to charge the devices to be charged (e.g., mobile phones) through the second USB port 140.

[0034] exist Figure 1 In the specific embodiment shown, when only the first USB port 130 is connected to the device to be charged, and the device to be charged supports a proprietary charging protocol (e.g., Huawei mobile phone proprietary charging protocol), the first USB port 130 provides a maximum charging power of 66W to the device to be charged; when only the first USB port 130 is connected to the device to be charged, and the device to be charged supports a standard charging protocol (e.g., PD protocol), the first USB port 130 provides a maximum charging power of 65W to the device to be charged; when only the second USB port 140 is connected to the device to be charged, and the device to be charged supports a proprietary charging protocol (e.g., PD protocol), the first USB port 130 provides a maximum charging power of 65W to the device to be charged; When the Huawei mobile phone proprietary charging protocol is used, the second USB port 140 provides a maximum charging power of 66W to the device being charged; when only the second USB port 140 is connected to the device being charged, and the device being charged supports a standard charging protocol (e.g., PD protocol), the second USB port 140 provides a maximum charging power of 65W to the device being charged; when both the first USB port 130 and the second USB port 140 are connected to the device being charged, the first USB port 130 provides a charging power of 45W to the device being charged, and the second USB port 140 also provides a charging power of 45W to the device being charged.

[0035] The CPSQ8841_A and CPSQ8841_B chips are Huawei's proprietary protocol and PD protocol control circuits or chips. They are responsible for protocol control, identifying charging devices such as mobile phones. If the device supports Huawei's proprietary protocol (e.g., high power 66W), it provides 66W charging power using Huawei's proprietary protocol; otherwise, it provides a maximum 65W charging power using the PD protocol. The CPSQ8841_A and CPSQ8841_B chips communicate via I2C to achieve power distribution, providing 45W (total 90W) charging power to both phones simultaneously during dual-port charging.

[0036] exist Figure 1In the embodiment shown, the vehicle-mounted high-power USB charging module further includes an input protection and filtering circuit 150. The input terminal of the input protection and filtering circuit 150 receives the vehicle-mounted DC input power supply VBAT, and its output terminal is connected to the input terminal Vin of the first DC boost / buck circuit 112 and the second DC boost / buck circuit 122. The input protection and filtering circuit 150 is used for reverse connection protection, surge protection and filtering of the vehicle-mounted DC input power supply VBAT.

[0037] Please refer to Figure 2 As shown, this is one embodiment of the present invention. Figure 1 The circuit diagram shown is for the input protection and filtering circuit. Figure 2 The input protection and filtering circuit shown includes an input reverse protection unit 152, a filtering unit 154, and a voltage regulation and filtering unit 156.

[0038] The input reverse protection unit 152 includes a PMOS transistor Q100, a Zener diode D101, a resistor R100, and a resistor R103. The source D of the PMOS transistor Q100 is connected to the vehicle DC input power supply VBAT, its gate G is connected to the connection node TP105, and its drain is connected to the connection node TP101. One end of the resistor R103 is connected to the connection node TP105, and the other end is grounded. The anode of the Zener diode D101 is connected to the connection node TP105, and its cathode is connected to the connection node TP101. One end of the resistor R100 is connected to the connection node TP105, and the other end is connected to the connection node TP101.

[0039] The filter unit 154 includes capacitors C101, C102, C103, C104, C105, C106, CE100, and inductor L100. Capacitor C103 is connected between connection node TP101 and the ground terminal; capacitor C104 is connected between connection node TP101 and the ground terminal; capacitor C105 is connected between connection node TP101 and the ground terminal; and capacitor C106 is connected between connection node TP101 and the ground terminal. Inductor L100 is connected between connection node TP101 and connection node TP102; capacitor C101 is connected between connection node TP102 and ground; capacitor C102 is connected between connection node TP102 and ground; capacitor CE100 is connected between connection node TP102 and ground; connection node TP102 is connected to the output terminal of input protection and filtering circuit 150 (or the input terminal VIN of the first DC boost / buck circuit 112 and the second DC boost / buck circuit 122).

[0040] The voltage regulation and filtering unit 156 includes a bidirectional Zener diode D100 and a capacitor C100. The bidirectional Zener diode D100 is connected between the vehicle DC input power supply VBAT and the ground terminal; the capacitor C100 is connected between the vehicle DC input power supply VBAT and the ground terminal.

[0041] exist Figure 1 In the illustrated embodiment, the in-vehicle high-power USB charging module further includes an input interface circuit 160. The Power pin of the input interface circuit 160 is used to provide in-vehicle DC input power VBAT. The enable pin EN of the input interface circuit 160 is used to provide an enable signal EN to the enable terminals of the first DC-DC boost / buck circuit 112 (or CPSQ5206_A chip) and the second DC-DC boost / buck circuit 122 (or CPSQ5206_B chip) to wake up the first DC-DC boost / buck circuit 112 (or CPSQ5206_A chip) and the second DC-DC boost / buck circuit 122 (or CPSQ5206_B chip) and start operation. The ground pin of the input interface circuit 160 is grounded. Please refer to [link to details] for further information. Figure 7 As shown, this is one embodiment of the present invention. Figure 1 The circuit diagram of the input interface circuit shown is shown.

[0042] In summary, this invention presents a technical solution for a 66W USB charging module supporting Huawei's proprietary protocol and a 65W USB charging module supporting PD protocol, based on domestically produced CPS chips. It utilizes the CPSQ5206 chip, which supports high-power output, and the CPSQ8841 chip, which supports both Huawei's proprietary protocol and PD protocol, fulfilling the requirement of Hongqi, the main vehicle manufacturer, for a 66W high-power output with Huawei's proprietary protocol. This design features power distribution capabilities. When used with a single port, it can provide a maximum charging power of 66W for phones supporting Huawei's proprietary protocol or a maximum charging power of 65W for PD protocol. When used with two ports, it can simultaneously provide 45W charging power to each of two phones, for a maximum dual-port output power of 90W. This design not only possesses an intelligent power distribution strategy but also automatically derating under different ambient temperatures, ensuring safe operation of the product under various conditions. This significantly guarantees the safety of in-vehicle electronic devices and meets users' urgent need for fast charging.

[0043] It should be noted that any modifications made by those skilled in the art to the specific embodiments of the present invention do not depart from the scope of the claims. Accordingly, the scope of the claims is not limited to the foregoing specific embodiments.

Claims

1. A vehicle-mounted high-power USB charging module, characterized in that, It includes a first charging circuit, a second charging circuit, a first USB interface, and a second USB interface. The first charging circuit includes a first DC-DC boost / buck circuit and a first charging protocol control circuit. The first DC-DC boost / buck circuit is used to convert the on-board DC input power VBAT received at its input terminal Vin into a DC-DC power supply VBUS1 to be provided to the first USB interface. The first charging protocol control circuit is connected to the first DC-DC boost / buck circuit and controls the first DC-DC boost / buck circuit to charge the device to be charged through the first USB interface based on a standard charging protocol or a proprietary charging protocol. The second charging circuit includes a second DC-DC boost / buck circuit and a second charging protocol control circuit. The second DC-DC boost / buck circuit is used to convert the on-board DC input power VBAT received at its input terminal Vin into a DC-DC converter to obtain a second DC power supply VBUS2 provided to the second USB interface. The second charging protocol control circuit is connected to the second DC-DC boost / buck circuit and the first charging protocol control circuit, and controls the second DC-DC boost / buck circuit to charge the device to be charged through the second USB interface based on a standard charging protocol or a proprietary charging protocol. The first USB interface is connected to the first DC buck-boost circuit and the first charging protocol control circuit; The second USB interface is connected to the second DC-DC buck-boost circuit and the second charging protocol control circuit. When the vehicle-mounted high-power USB charging module detects that only the first USB interface is connected to a device to be charged, it continues to detect whether the device to be charged supports the proprietary charging protocol. If yes, the first charging protocol control circuit controls the first DC-DC boost / buck circuit to charge the device to be charged through the first USB interface based on the proprietary charging protocol. If no, the first charging protocol control circuit controls the first DC-DC boost / buck circuit to charge the device to be charged through the first USB interface based on the standard charging protocol. When the vehicle-mounted high-power USB charging module detects that only the second USB interface is connected to a device to be charged, it continues to detect whether the device to be charged supports the proprietary charging protocol. If yes, the second charging protocol control circuit controls the second DC-DC boost / buck circuit to charge the device to be charged through the second USB interface based on the proprietary charging protocol; if no, the second charging protocol control circuit controls the second DC-DC boost / buck circuit to charge the device to be charged through the second USB interface based on the standard charging protocol. When the vehicle-mounted high-power USB charging module detects that both the first USB port and the second USB port are connected to devices to be charged, the first charging protocol control circuit controls the first DC-DC boost / buck circuit to charge the devices to be charged via the first USB port; simultaneously, the second charging protocol control circuit controls the second DC-DC boost / buck circuit to charge the devices to be charged via the second USB port. When only the first USB interface is connected to the device to be charged, and the device to be charged supports a proprietary charging protocol, the first USB interface provides a maximum charging power of 66W to the device to be charged. When only the first USB port is connected to a device to be charged, and the device to be charged supports the standard charging protocol, the first USB port provides a maximum charging power of 65W to the device to be charged. When only the second USB port is connected to the device to be charged, and the device to be charged supports a proprietary charging protocol, the second USB port provides a maximum charging power of 66W to the device to be charged. When only the second USB port is connected to the device to be charged, and the device to be charged supports the standard charging protocol, the second USB port provides a maximum charging power of 65W to the device to be charged. When both the first USB port and the second USB port are connected to a device to be charged, the first USB port provides 45W of charging power to the device to be charged, and the second USB port provides 45W of charging power to the device to be charged.

2. The vehicle-mounted high-power USB charging module according to claim 1, characterized in that, The first DC-DC buck-boost circuit includes a CPSQ5206_A chip, which, together with an external MOSFET, constitutes the first DC-DC buck-boost circuit. The first charging protocol control circuit includes a CPSQ8841_A chip, which is connected to the corresponding pin of the first USB interface. The second DC-DC buck-boost circuit includes a CPSQ5206_B chip, which, together with an external MOSFET, constitutes the second DC-DC buck-boost circuit. The second charging protocol control circuit includes a CPSQ8841_B chip, which is connected to the corresponding pin of the second USB interface; The CPSQ8841_A chip and the CPSQ8841_B chip are connected via the I2C bus signal lines SCL\SDA.

3. The vehicle-mounted high-power USB charging module according to claim 2, characterized in that, The CC11, CC12, DP1, and DM1 pins of the first USB interface are respectively connected to the corresponding pins of the CPSQ8841_A chip; The CC21, CC22, DP2, and DM2 pins of the second USB interface are respectively connected to the corresponding pins of the CPSQ8841_B chip.

4. The vehicle-mounted high-power USB charging module according to claim 2, characterized in that, The CPSQ8841_A chip supports the PD standard charging protocol and the Huawei proprietary charging protocol. The CPSQ8841_B chip supports the PD standard charging protocol and the Huawei proprietary charging protocol. Both the first USB interface and the second USB interface are USB Type-C interfaces.

5. The vehicle-mounted high-power USB charging module according to claim 2, characterized in that, The first charging circuit also includes a transistor Q1. The detection terminal of the CPSQ8841_A chip is connected to the first DC power supply VBUS1 provided by the first DC buck-boost circuit, and its first control terminal is connected to the control terminal of the transistor Q1. The first connection terminal of the transistor Q1 is connected to the first DC power supply VBUS1, and the second connection terminal of the transistor Q1 is connected to the FB pin of the CPSQ5206_A chip. The CPSQ8841_A chip outputs a corresponding control signal to the control terminal of the transistor Q1 based on the voltage of the first DC power supply VBUS1 detected by its detection terminal, so as to adjust the first DC power supply VBUS1 output by the first DC buck-boost circuit. The second charging circuit also includes a transistor Q2. The detection terminal of the CPSQ8841_B chip is connected to the second DC power supply VBUS2 provided by the second DC buck-boost circuit. Its first control terminal is connected to the control terminal of the transistor Q2. The first connection terminal of the transistor Q2 is connected to the second DC power supply VBUS2. The second connection terminal of the transistor Q2 is connected to the FB pin of the CPSQ5206_B chip. The CPSQ8841_B chip outputs a corresponding control signal to the control terminal of the transistor Q2 based on the voltage of the second DC power supply VBUS2 detected by its detection terminal, so as to adjust the second DC power supply VBUS2 output by the second DC buck-boost circuit.

6. The vehicle-mounted high-power USB charging module according to claim 5, characterized in that, The first charging circuit also includes a first switch K1, which is connected between the first DC power supply VBUS1 provided by the first DC buck-boost circuit and the VBUS1 pin of the first USB interface; the control terminal of the first switch K1 is connected to the second control terminal of the CPSQ8841_A chip, and the CPSQ8841_A chip controls the first switch K1 to be turned on or off. The second charging circuit also includes a second switch K2, which is connected between the second DC power supply VBUS2 provided by the second DC boost / buck circuit and the VBUS2 pin of the second USB interface; the control terminal of the second switch K2 is connected to the second control terminal of the CPSQ8841_B chip, and the CPSQ8841_B chip controls the second switch K2 to be turned on or off.

7. The in-vehicle high-power USB charging module according to any one of claims 1-6, characterized in that, It also includes input protection and filtering circuits. The input terminal of the input protection and filtering circuit receives the vehicle-mounted DC input power supply VBAT, and its output terminal is connected to the input terminal Vin of the first DC boost / buck circuit and the second DC boost / buck circuit.

8. The vehicle-mounted high-power USB charging module according to claim 7, characterized in that, The input protection and filtering circuit includes an input reverse protection unit and a filtering unit. The input reverse protection unit includes a PMOS transistor Q100, a Zener diode D101, a resistor R100, and a resistor R103. The source of the PMOS transistor Q100 is connected to the vehicle-mounted DC input power supply, its gate is connected to connection node TP105, and its drain is connected to connection node TP101. One end of the resistor R103 is connected to connection node TP105, and the other end is grounded. The anode of the Zener diode D101 is connected to connection node TP105, and its cathode is connected to connection node TP101. One end of the resistor R100 is connected to connection node TP105, and the other end is connected to connection node TP101. The filtering unit includes capacitors C101, C102, C103, C104, C105, C106, CE100, and inductor L100. Specifically, capacitor C103 is connected between connection node TP101 and the ground terminal; capacitor C104 is connected between connection node TP101 and the ground terminal; capacitor C105 is connected between connection node TP101 and the ground terminal; capacitor C106 is connected between connection node TP101 and the ground terminal; inductor L100 is connected between connection node TP101 and connection node TP102; capacitor C101 is connected between connection node TP102 and the ground terminal; capacitor C102 is connected between connection node TP102 and the ground terminal; capacitor CE100 is connected between connection node TP102 and the ground terminal; and connection node TP102 is connected to the output terminal of the input protection and filtering circuit.

9. The vehicle-mounted high-power USB charging module according to claim 8, characterized in that, The input protection and filtering circuit also includes a voltage stabilizing and filtering unit. The voltage stabilizing and filtering unit includes a bidirectional Zener diode D100 and a capacitor C100. The bidirectional Zener diode D100 is connected between the vehicle-mounted DC input power supply and the ground terminal; The capacitor C100 is connected between the vehicle-mounted DC input power supply and the ground terminal.

10. The vehicle-mounted high-power USB charging module according to claim 1, characterized in that, It also includes an input interface circuit. The power pin Power of the input interface circuit is used to provide the vehicle-mounted DC input power VBAT; The enable pin of the input interface circuit is used to provide an enable signal EN to the enable terminals of the first DC-DC buck-boost circuit and the second DC-DC buck-boost circuit to wake up the first DC-DC buck-boost circuit and the second DC-DC buck-boost circuit to start working. The ground pin of the input interface circuit is grounded.

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