High-integration-level vehicle-mounted charging module

Abstract

The invention relates to a high-integration-level vehicle-mounted charging module which comprises a power supply connector, a power supply reverse protection circuit, an EMC protection loop, a first fast charging protocol chip, a second fast charging protocol chip and a double Type-C interface. The power supply connector is connected with a vehicle-mounted power supply, and the reverse protection circuit prevents reverse current from entering the EMC protection loop for electromagnetic compatibility processing. The processed power supply is respectively transmitted to the two high-integration-level fast charging protocol chips, and the two fast charging protocol chips both integrate power supply conversion and protocol identification functions, respectively drive independent Type-C interfaces and intelligently identify multiple fast charging protocols. The module adopts a high-integration-level fast charging protocol chip, the number of peripheral components is greatly reduced, the size and the weight of the module are remarkably reduced, and the utilization rate of a vehicle-mounted space is improved; through multiple designs of a power supply reverse protection circuit, an EMC protection circuit and the like, the module is ensured to work stably in a vehicle-mounted complex environment, and the quick charging requirement of multiple devices in a vehicle-mounted scene can be met.

Description

Technical Field

[0001] This invention relates to the field of vehicle charging technology, and in particular to a highly integrated vehicle charging module. Background Technology

[0002] As automobiles transform from simple transportation tools into intelligent mobile terminals, especially in the new energy vehicle sector, a large number of high-power charging ports has become a very direct and attractive selling point for consumers. The strategic deployment of multiple high-performance charging ports has become an effective means for automakers to enhance product appeal. Modern commutes involve not only mobile phones but also tablets, laptops, game consoles, Bluetooth headsets, action cameras, and more. The need for charging ports has evolved from prioritizing the driver to catering to all users throughout the vehicle, becoming an important indicator of vehicle comfort and user-friendly design.

[0003] Currently available high-power, multi-port vehicle charging modules require significant interior space for overall vehicle deployment, and are all front-mounted, resulting in large product dimensions.

[0004] Existing high-power, multi-port onboard charging modules typically require significant interior space when deployed within a vehicle. These modules are front-mounted, resulting in large dimensions that can create seams after assembly with the panel, affecting aesthetics and potentially causing color and surface variations. Current designs, while increasing power output, have failed to effectively control size and weight, leading to inefficient space utilization and a less-than-sleek appearance. Summary of the Invention

[0005] In view of this, it is necessary to provide a highly integrated on-board charging module to address the aforementioned shortcomings of the prior art.

[0006] This invention provides a highly integrated vehicle charging module, including a power connector, a power reverse protection circuit, an EMC protection circuit, a first fast charging protocol chip, a second fast charging protocol chip, a first Type-C interface, and a second Type-C interface; The input end of the power connector is used to connect to the vehicle power supply, and the output end is connected to the reverse power protection circuit, which is used to prevent power from flowing in reverse and to provide protection. The input terminal of the EMC protection circuit is connected to the output terminal of the reverse power protection, and the output terminal of the EMC protection circuit is connected to the first fast charging protocol chip and the second fast charging protocol chip respectively to provide electromagnetic compatibility protection. The output terminal of the first fast charging protocol chip is connected to the first Type-C interface, and the output terminal of the second fast charging protocol chip is connected to the second Type-C interface, which is used to identify the charging protocol of the external device and control the charging output of the corresponding Type-C interface.

[0007] Preferably, the highly integrated vehicle charging module also includes a backlight interface, the input end of which is connected to a power connector to receive power and provide backlight display for the first Type-C interface and the second Type-C interface.

[0008] Preferably, the reverse power protection circuit includes a PMOS transistor Q1, a diode D2, a resistor R2, and a resistor R4; The source of PMOS transistor Q1 is connected to the output terminal of the power connector; the drain of PMOS transistor Q1 is connected to the input terminal of the EMC protection circuit; the anode of diode D2 is connected to the source of PMOS transistor Q1, and the cathode is connected to the gate of PMOS transistor Q1; resistor R2 is connected between the gate and source of PMOS transistor Q1; resistor R4 is connected between the gate of PMOS transistor Q1 and ground.

[0009] Preferably, the EMC protection circuit includes a common-mode inductor L1, capacitors C1, C2, and C3, and a TVS diode D1. The input terminal of the common-mode inductor L1 is connected to the output terminal of the reverse power protection circuit; the output terminal of the common-mode inductor L1 is connected to the input terminals of the first fast charging protocol chip and the second fast charging protocol chip; capacitors C1 and C2 are connected in parallel between the input terminal of the common-mode inductor L1 and ground; capacitor C3 is connected in parallel between the output terminal of the common-mode inductor L1 and ground; and TVS diode D1 is connected in parallel between the input terminal of the common-mode inductor L1 and ground.

[0010] Preferably, both the first Type-C interface and the second Type-C interface include a Type-C connector, an ESD protection circuit, and a signal line; both the first Type-C interface and the second Type-C interface support QC3.0, QC2.0, PD3.0, FCP, and AFC fast charging protocols.

[0011] The Type-C connector has a VBUS power pin, a CC configuration channel pin, a DP data positive pin, and a DM data negative pin. The ESD protection circuit is composed of a TVS diode array, one end of which is connected to the data pin and configuration channel pin of the Type-C connector, and the other end is grounded. The signal lines include data signal lines and configuration channel signal lines; resistors are connected in series on both the data signal lines and the configuration channel signal lines; and a capacitor to ground is also connected in parallel on the data signal lines.

[0012] Preferably, the backlight interface includes at least one LED and a current-limiting resistor connected in series therewith; The anode of the LED is connected to the power input terminal of the backlight interface through the current-limiting resistor, and the cathode of the LED is grounded.

[0013] Preferably, the first fast charging protocol chip is model SC87550Q. The power input terminal of the first fast charging protocol chip is connected to the output terminal of the EMC protection circuit; the data pins and configuration channel pins of the first fast charging protocol chip are respectively connected to the corresponding signal lines of the first Type-C interface; the power output terminal of the first fast charging protocol chip is connected to the VBUS pin of the first Type-C interface.

[0014] Preferably, the second fast charging protocol chip is model CX8831. The power input terminal of the second fast charging protocol chip is connected to the output terminal of the EMC protection circuit; the data pins and configuration channel pins of the second fast charging protocol chip are respectively connected to the corresponding signal lines of the second Type-C interface; the power output terminal of the second fast charging protocol chip is connected to the VBUS pin of the second Type-C interface.

[0015] Preferably, the highly integrated vehicle charging module further includes a shielding cover; the shielding cover is disposed inside the housing of the highly integrated vehicle charging module and covers the first fast charging protocol chip and the second fast charging protocol chip, for isolating electromagnetic interference and assisting in heat dissipation.

[0016] Preferably, the protection rating of the housing is IP5K2.

[0017] The highly integrated vehicle charging module provided by this invention has the following advantages compared with the prior art: 1) This invention integrates power conversion and protocol identification functions into a single chip by using highly integrated fast charging protocol chips SC87550Q and CX8831, which greatly reduces the number of peripheral components and optimizes the overall structure. As a result, while providing 60W and 18W dual-port high power output, the size and weight of the module are significantly reduced, and the utilization rate of vehicle space is improved.

[0018] 2) The highly integrated vehicle charging module provided by this invention includes a reverse power protection circuit, an EMC protection circuit, and an ESD protection circuit for the Type-C interface. The reverse power protection circuit prevents reverse power flow from damaging the circuit; the EMC protection circuit provides electromagnetic compatibility protection; and the ESD protection circuit protects the interface from electrostatic discharge, providing multiple safeguards for the module to operate stably in the complex environment of a vehicle, ensuring normal and efficient charging of electronic devices.

[0019] 3) This invention uses a shielding cover to isolate electromagnetic interference and assist in heat dissipation. Combined with the IP5K2 dustproof and waterproof design, it ensures that the module can still work stably and safely in harsh environments.

[0020] 4) The dual Type-C interfaces of this invention's highly integrated vehicle charging module support multiple mainstream fast charging protocols such as PD3.0 and QC3.0, and can intelligently identify and meet the fast charging needs of various external devices such as mobile phones and laptops. Furthermore, the backlight interface can be synchronized with the vehicle's ambient lighting, further enhancing ease of use and the overall technological feel and passenger experience of the vehicle. Attached Figure Description

[0021] Figure 1 The structural schematic diagram of the highly integrated vehicle charging module provided by this invention; Figure 2 A schematic diagram of the external structure of the highly integrated vehicle charging module provided by the present invention; Figure 3 This is a schematic diagram of the overall circuit architecture of the highly integrated vehicle charging module of the present invention. Figure 4 A circuit diagram of the first fast charging protocol chip provided by the present invention; Figure 5 A circuit diagram of the second fast charging protocol chip provided by the present invention; Figure 6 A backlight driving circuit diagram of the backlight interface provided by the present invention; Figure 7 The signal circuit diagram of the first Type-C interface provided by the present invention; Figure 8 A connector circuit diagram of the first Type-C interface provided for this invention; Figure 9 ESD protection circuit diagram of the first Type-C interface provided for this invention; Figure 10 The signal circuit diagram of the second Type-C interface provided by this invention; Figure 11 The connector circuit diagram for the second Type-C interface provided by the present invention. Detailed Implementation

[0022] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] Figure 1 This is a schematic diagram illustrating the structure of the highly integrated on-board charging module provided by the present invention. (Refer to...) Figure 1 The present invention provides a highly integrated vehicle charging module, including a power connector, a power reverse protection circuit, an EMC protection circuit, a first fast charging protocol chip, a second fast charging protocol chip, a first Type-C interface and a second Type-C interface; The input end of the power connector is used to connect to the vehicle power supply, and the output end is connected to the reverse power protection circuit, which is used to prevent power from flowing in reverse and to provide protection. The input terminal of the EMC protection circuit is connected to the output terminal of the reverse power protection, and the output terminal of the EMC protection circuit is connected to the first fast charging protocol chip and the second fast charging protocol chip respectively to provide electromagnetic compatibility protection. The output terminal of the first fast charging protocol chip is connected to the first Type-C interface, and the output terminal of the second fast charging protocol chip is connected to the second Type-C interface, which is used to identify the charging protocol of the external device and control the charging output of the corresponding Type-C interface.

[0025] Specifically, the system architecture of the highly integrated vehicle charging module of this invention uses a power connector as the input port for vehicle power, and a reverse power protection circuit as a secondary protection unit to prevent vehicle power from flowing back into the module's internal circuitry, thus avoiding damage to the circuitry due to reverse power and providing protection. An EMC protection circuit filters electromagnetic interference, providing a stable environment for subsequent circuits. The first and second fast charging protocol chips integrate power conversion and protocol identification functions, supporting fast charging protocols such as QC3.0 / QC2.0 / PD3.0 with PPS / FCP / AFC, and can intelligently identify and meet the fast charging needs of various external devices such as mobile phones and laptops, dynamically adjusting the output voltage (5V-20V) and power (60W / 18W). The two chips process the charging needs of different devices in parallel. The first Type-C interface and the second Type-C interface are connected to the first and second fast charging protocol chips, respectively, serving as charging interfaces for external devices. The first Type-C interface outputs 60W charging power, and the second Type-C interface outputs 18W charging power, supporting multiple fast charging protocols to meet the charging needs of different devices such as mobile phones and tablets.

[0026] The highly integrated vehicle charging module provided by this invention, with multiple safety guarantees such as reverse power protection and EMC protection, significantly reduces the module's size and weight by using highly integrated chips, thereby improving the utilization rate of the vehicle's internal space. It achieves highly integrated vehicle charging with dual Type-C interfaces, delivering power of 60W and 18W respectively, and supports multiple fast charging protocols.

[0027] Figure 2 This is a schematic diagram of the external structure of the highly integrated vehicle charging module provided by the present invention. (Refer to...) Figure 2 The outer casing features a compact design, suitable for in-vehicle installation. The module is connected to the vehicle body via a rear-mounting method. In the context of this highly integrated in-vehicle charging module, rear-mounting refers to the installation method where the module is fixed to a pre-designed mounting location on the vehicle body (such as the interior of the center console, the inner side of the door trim panel, or other concealed or semi-concealed installation areas) using the non-exposed charging port side as the fixing surface. After installation, only the charging interface on the front of the module is exposed on the interior surface of the vehicle, thus achieving seamless integration and visual concealment with the interior panel.

[0028] Only the charging terminals of the first and second Type-C ports are exposed on the outer casing; all other functional components are encapsulated inside. The casing is secured to the vehicle body using a snap-fit ​​structure, with the snaps corresponding to pre-set mounting positions on the vehicle body for easy installation and removal. Simultaneously, the module contains a shielding cover that at least covers the first and second fast-charging protocol chips, and can also be designed to cover all internal functional components, effectively isolating electromagnetic interference and providing auxiliary heat dissipation for the chips.

[0029] The highly integrated vehicle charging module provided in this invention features a rear-mounted design with only the charging port exposed, keeping the vehicle interior clean and seamless, thus enhancing aesthetics. The snap-fit ​​fixing structure simplifies the assembly and disassembly process and reduces maintenance difficulty. The IP5K2 housing protection rating blocks everyday water and dust ingress, preventing module damage; the internal shielding cover isolates electromagnetic interference and aids in chip heat dissipation, ensuring stable operation of the module in the complex environment of a vehicle, further improving reliability and user experience.

[0030] Figure 3 This is a schematic diagram of the overall circuit architecture of the highly integrated vehicle charging module of the present invention. Figure 3 The circuit architecture of the highly integrated on-board charging module of this invention is demonstrated. Power connector J2 serves as the physical and electrical access point for the on-board 12V DC power supply. The power input first enters a reverse power protection circuit centered around a PMOS transistor Q1. This circuit includes PMOS transistor Q1, diode D2, resistors R2 and R4. The source of PMOS transistor Q1 is connected to the output terminal of the power connector; the drain of PMOS transistor Q1 is connected to the input terminal of the EMC protection circuit; the anode of diode D2 is connected to the source of PMOS transistor Q1, and the cathode is connected to the gate of PMOS transistor Q1; resistor R2 is connected between the gate and source of PMOS transistor Q1; and resistor R4 is connected between the gate of PMOS transistor Q1 and ground. The reverse power protection circuit achieves current direction monitoring and reverse cutoff protection through an intelligent control loop composed of Q1, D2, R2, and R4.

[0031] The protected power supply then enters the EMC protection circuit. The EMC protection circuit includes a common-mode inductor L1, capacitors C1, C2, and C3, and a TVS diode D1. The input terminal of the common-mode inductor L1 is connected to the output terminal of the reverse power protection circuit; the output terminal of the common-mode inductor L1 is connected to the input terminals of the first and second fast-charging protocol chips; capacitors C1 and C2 are connected in parallel between the input terminal of the common-mode inductor L1 and ground; capacitor C3 is connected in parallel between the output terminal of the common-mode inductor L1 and ground; and TVS diode D1 is connected in parallel between the input terminal of the common-mode inductor L1 and ground. The EMC protection circuit uses the common-mode inductor L1, input capacitors C1 and C2, and output capacitor C3 to form a π-type filter network, effectively suppressing common-mode and differential-mode interference, and is further protected by the TVS diode D1 connected in parallel at the input terminal to clamp transient surge voltages.

[0032] The purified power is distributed in parallel to two independent fast-charging protocol chips. The first path uses the SC87550Q chip U1, which integrates a buck-boost converter and can dynamically convert the input voltage to multiple voltage levels from 5V to 20V, providing a maximum power output of 60W for the first Type-C interface J1. The second path uses the CX8831 chip U2, which integrates a buck converter and provides a maximum power output of 18W for the second Type-C interface J3. Both Type-C interfaces have built-in complete signal conditioning and ESD protection circuits, ensuring data signal integrity through series resistors and parallel capacitors, and protecting against electrostatic discharge through a TVS diode array. The backlight interface draws power from the power connector and drives an LED array through a current-limiting resistor to provide illumination for the charging area. The entire core circuit is encapsulated in a metal shield, effectively isolating electromagnetic interference and assisting in chip heat dissipation.

[0033] This invention's highly integrated vehicle charging module achieves dual-port high-power fast charging output within a minimal space through highly integrated chips and optimized circuit design. The system supports multiple fast charging protocols such as PD and QC, and can automatically identify and adapt to different devices. The overall design reduces the module size by more than 40%, while providing 60W and 18W dual-interface output, solving the problems of exposed interfaces, noticeable seams, and large space occupation inherent in traditional vehicle chargers.

[0034] Figure 4 The circuit diagram of the first fast charging protocol chip provided by the present invention. Figure 4This paper demonstrates a detailed implementation scheme of the first fast charging protocol chip U1 and its peripheral circuits in this invention. The first fast charging protocol chip is model SC87550Q. The circuit uses the highly integrated fast charging protocol chip U1 as its core. Its power input terminal VIN is connected to the output terminal of the preceding EMC protection circuit through a multi-stage filtering network. Input filter capacitors C17 and C19 form a large-capacity energy storage unit, which, together with subsequent capacitors such as C18 and C27, forms a hierarchical decoupling structure, effectively ensuring the stability of the chip's operation.

[0035] The four switching pins SW1 to SW4 of the first fast charging protocol chip U1 are connected to a four-switch Buck-Boost power stage circuit composed of inductor L1 and power MOSFETs. This topology allows the chip to flexibly boost or buck the onboard 12V input voltage to various output voltages such as 5V, 9V, 15V, and 20V, depending on the device requirements. The feedback network monitors the output voltage in real time through a precision resistor divider and compares it with the chip's internal reference voltage to achieve precise closed-loop control of the output voltage.

[0036] The chip's data communication pins CC1 and CC2 are connected to the configuration channel of the Type-C interface via pull-up resistors R16 and R17 for USB PowerDelivery protocol handshake. The data pins DP / DM are directly connected to the interface, supporting the recognition of traditional fast charging protocols such as QC3.0. The chip communicates digitally with external devices through its internally integrated protocol recognition engine, intelligently adjusting output voltage and current, with a maximum output power of 60W.

[0037] In this embodiment, the first fast charging protocol chip combines buck-boost power conversion with multi-protocol identification through a highly integrated single-chip solution, simplifying the peripheral circuit structure. The use of an efficient switching topology and multi-stage filtering design ensures power conversion efficiency and output stability.

[0038] Figure 5 The circuit diagram of the second fast charging protocol chip provided by the present invention. Figure 5 The complete application circuit of the second fast charging protocol chip CX8831 in this invention is shown. The circuit is based on the highly integrated step-down fast charging protocol chip U2. Its power input terminal VIN is connected to the front-end EMC protection circuit through a π-type filter network. The input capacitors C30 and C31 form a high-frequency decoupling and energy storage combination to ensure that the chip works stably in the vehicle power fluctuation environment.

[0039] The chip integrates a synchronous Buck converter, using inductor L3 to construct a step-down topology, converting the 12V automotive input voltage to a 5V or 9V output voltage. The feedback network samples the output voltage in real time through a precision resistor divider and compares it with an internal reference voltage to achieve closed-loop precision regulation. The chip's enable control pin enables intelligent power management through specific circuit configuration. The protocol communication section connects to the second Type-C interface via configuration channel pins CC12 and CC22, and the built-in protocol recognition engine supports mainstream fast charging standards such as PD3.0 and QC3.0. The data pin DP / DM directly connects to the interface data line, enabling bidirectional communication with connected devices. The power output VBUS is connected to the Type-C interface through an LC filter circuit to ensure that the output power quality meets specifications.

[0040] The second fast charging protocol chip provided in this embodiment is based on the highly integrated CX8831 chip, integrating power conversion and protocol functions, significantly reducing the number of peripheral components, optimizing module size and weight, and improving the utilization rate of vehicle interior space. The efficient voltage conversion topology and multi-stage filtering design of the second fast charging protocol chip ensure stable power output, and together with vehicle EMC protection and shielding, it can work stably in complex electrical environments.

[0041] Figure 6 A backlight driving circuit diagram for the backlight interface provided by this invention. (Refer to...) Figure 1 and Figure 6 The highly integrated vehicle charging module also includes a backlight interface. The input end of the backlight interface is connected to the power connector to receive power and provide backlight display for the first Type-C interface and the second Type-C interface.

[0042] Reference Figure 6 The backlight driving circuit consists of two independent backlight branches, providing backlight for the first Type-C interface and the second Type-C interface, respectively. The first Type-C interface backlight branch includes current-limiting resistors R28 and R29, and LEDs LED1 and LED2. One end of R28 is connected to the power input terminal VIN, and the other end is connected to the anode of LED1; one end of R29 is connected to VIN, and the other end is connected to the anode of LED2; the cathodes of both LED1 and LED2 are grounded. The second Type-C interface backlight branch includes current-limiting resistors R30 and R31, and LEDs LED3 and LED4. One end of R30 is connected to VIN, and the other end is connected to the anode of LED3; one end of R31 is connected to VIN, and the other end is connected to the anode of LED4; the cathodes of both LED3 and LED4 are grounded.

[0043] The VIN power output from the power connector is limited by current-limiting resistors R28, R29, R30, and R31, which then drive the corresponding LEDs (LED1-LED4) to emit light. The core function of the current-limiting resistors is to prevent the LEDs from being damaged by excessive current, ensuring that they operate stably within their rated current range. LED1 and LED2 provide backlighting for the first Type-C interface, while LED3 and LED4 provide backlighting for the second Type-C interface, enabling independent backlighting display functionality for both interfaces.

[0044] The backlight driving circuit architecture provided in this embodiment is simple and reliable. Through a combination of LEDs and current-limiting resistors, it draws power from the power connector to provide independent backlighting for the dual Type-C interfaces. In low-light conditions inside the vehicle, it clearly indicates the location of the charging ports, facilitating quick plugging and unplugging of devices and improving operational convenience. Simultaneously, the backlight design can match the style of the vehicle's ambient lighting, enhancing the technological feel and aesthetics of the entire interior, further improving the user's visual experience and satisfaction.

[0045] Figure 7 This is a signal circuit diagram of the first Type-C interface provided by the present invention. Figure 7 This demonstrates the specific implementation of the signal lines for the first Type-C interface. The signal lines include data signal lines DM1 and DP1, and configuration channel signal lines CC11 and CC21. Each signal line is connected in series with 33Ω resistors R1, R3, R5, and R7. Data signal lines DM1 and DP1 are also connected in parallel with 330pF capacitors to ground C1, C14, C15, and C22. Resistors R1 / R3 / R5 / R7 are connected in series on the data lines DP1 / DM1 and the configuration channels CC11 / CC21 for impedance matching and signal integrity protection. Simultaneously, 330 picofarad capacitors C1 / C14 are connected in parallel to ground on the data lines to effectively filter out high-frequency noise interference. The configuration channels use precision resistors to establish a standard pull-up, enabling intelligent device type identification. Series resistors achieve impedance matching and signal current limiting, while parallel capacitors filter out high-frequency noise, making DM, DP, and CC signal transmission more stable and ensuring accurate and reliable protocol communication between the first Type-C interface and the first fast charging protocol chip, thereby supporting the identification and interaction of multiple fast charging protocols such as QC3.0 and PD3.0.

[0046] Both the first and second Type-C interfaces consist of a Type-C connector, ESD protection circuitry, and signal lines. The Type-C connector, as the core physical connection, features VBUS power pins, DP data positive pins, DM data negative pins, and CC configuration channel pins, handling power and protocol signal transmission. The signal lines include data signal lines and the CC configuration channel signal line. Series resistors on these lines achieve impedance matching and current limiting, while parallel capacitors to ground on the data signal lines filter high-frequency noise, ensuring stable protocol communication. The ESD protection circuitry consists of a TVS diode array, with one end connected to the Type-C connector's data lines, configuration channel, and VBUS pins, and the other end grounded. This allows for rapid voltage clamping during electrostatic discharge or surge impacts, protecting the interface and subsequent circuitry. Through the synergy of these three components, both interfaces achieve 60W and 18W power output respectively, and both support multiple fast charging protocols.

[0047] Figure 8 This is a connector circuit diagram for the first Type-C interface provided by the present invention. Figure 8 The complete pin definitions and physical interface structure of the Type-C connector J1 are demonstrated. The connector includes four VBUS power pins for high-current transmission, two configuration channels CC1 / CC2 for power negotiation, and two data differential pairs (DP / DM) for USB 2.0 data transfer. It also includes a dedicated ground pin, sideband usage signals, and connection status detection pins, forming a complete interface specification compliant with the Type-C standard.

[0048] Figure 9 This invention provides an ESD protection circuit diagram for a first Type-C interface. Figure 9 The implementation scheme of the ESD protection circuit is demonstrated. The ESD protection circuit consists of a TVS diode array, including D12 and D13 for the VBUS terminal, and D3, D4, D5, and D6 for the data / configuration channels. One end of each TVS diode is connected to the VBUS1, CC2-1, CC1-1, DM-1, and DP-1 pins of the Type-C connector, while the other end is grounded. The ESD protection circuit employs a multi-channel TVS diode array architecture, where D12 / D13 specifically protect the VBUS power line, and D3-D6 and D7-D10 respectively protect the data lines and configuration channels. All TVS diodes are bidirectional, with one end connected to the signal line and the other end grounded, forming a low-impedance discharge path for electrostatic discharge pulses. When the interface encounters static electricity or surges, the TVS diodes quickly conduct to clamp overvoltages, protecting the subsequent signal conditioning circuitry and fast-charging protocol chip, ensuring the electrical safety of the interface in the complex electromagnetic environment of an automotive environment.

[0049] The first and second Type-C interfaces provided in this embodiment of the invention ensure stable protocol communication through signal lines and support the recognition of multiple fast charging protocols such as QC3.0 / PD3.0. The Type-C connector enables physical transmission of 60W power and signals, meeting the fast charging needs of multiple devices; the ESD protection circuit resists electrostatic interference, ensuring the interface is stable and reliable in the vehicle environment. This provides users with an efficient and safe fast charging experience.

[0050] Figure 10 The circuit diagram of the signal line for the second Type-C interface provided by this invention includes data signal lines DM2 and DP2, and configuration channel signal lines CC22 and CC12. Each signal line is connected in series with 33Ω resistors R22, R24, R25, and R26. Data signal lines DM2 and DP2 are also connected in parallel with 330pF capacitors to ground C37, C50, C53, and C55. (Refer to...) Figure 10 Series resistors R22, R24, R25, and R26 achieve impedance matching and signal current limiting, while parallel capacitors filter out high-frequency noise, making the transmission of DM, DP, and CC signals more stable and ensuring accurate and reliable protocol communication between the second Type-C interface and the second fast charging protocol chip, thereby supporting the recognition and interaction of multiple fast charging protocols such as QC2.0, QC3.0, and AFC.

[0051] Figure 11 This is a connector circuit diagram for the second Type-C interface provided by the present invention. (Refer to...) Figure 11 The second Type-C interface, Type-C connector J3, includes VBUS power pins B4, A4, B9, and A9; DP data positive pin A6; DM data negative pins A7, B7, and B6; CC configuration channel pins A5 and B5; and GND pins A1, B1, A12, and B12. The VBUS pins receive the 18W power output from the second fast-charging protocol chip. The DP, DM, and CC pins connect to the DM2-2, DP2-2, CC1-2, and CC2-2 terminals of the signal conditioning circuit, respectively, enabling protocol communication with external devices. The connector uses a standard Type-C interface pinout, including necessary ground pins, sideband signal pins, and status detection pins, conforming to the Type-C interface specification.

[0052] This invention integrates power conversion and protocol identification functions into a single chip by using highly integrated fast charging protocol chips SC87550Q and CX8831, which significantly reduces the number of peripheral components and optimizes the overall structure. As a result, while providing 60W and 18W dual-port high power output, the size and weight of the module are significantly reduced, and the utilization rate of vehicle space is improved.

[0053] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise expressly specified and limited, the terms "installed," "connected," or "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate medium; or a connection within two components. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0055] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A high-integration level on-board charging module, characterized by, The power connector, the power reverse protection circuit, the EMC protection circuit, the first fast charging protocol chip, the second fast charging protocol chip, the first Type-C interface and the second Type-C interface are included. The input end of the power connector is used for connecting the vehicle-mounted power supply, and the output end is connected to the power reverse protection circuit. The input end of the EMC protection circuit is connected to the output end of the power reverse protection circuit, and the output end of the EMC protection circuit is connected to the first fast charging protocol chip and the second fast charging protocol chip. The output end of the first fast charging protocol chip is connected to the first Type-C interface, and the output end of the second fast charging protocol chip is connected to the second Type-C interface.

2. The high-integration level on-board charging module according to claim 1, characterized in that, It also includes: The backlight interface, the input end of the backlight interface is connected to the power connector, is used for receiving power and providing backlight display for the first Type-C interface and the second Type-C interface.

3. The high-integration level on-board charging module according to claim 1, characterized in that, The power reverse protection circuit includes a PMOS tube Q1, a diode D2, a resistor R2 and a resistor R4. The source of the PMOS tube Q1 is connected to the output end of the power connector; the drain of the PMOS tube Q1 is connected to the input end of the EMC protection circuit; the anode of the diode D2 is connected to the source of the PMOS tube Q1, and the cathode is connected to the gate of the PMOS tube Q1; the resistor R2 is connected between the gate and the source of the PMOS tube Q1; the resistor R4 is connected between the gate of the PMOS tube Q1 and the ground.

4. The high-integration level on-board charging module according to claim 1, characterized in that, The EMC protection circuit includes a common mode inductor L1, a capacitor C1, a capacitor C2, a capacitor C3 and a TVS tube D1. The input end of the common mode inductor L1 is connected to the output end of the power reverse protection circuit; the output end of the common mode inductor L1 is connected to the input end of the first fast charging protocol chip and the second fast charging protocol chip; the capacitor C1 and the capacitor C2 are connected in parallel between the input end of the common mode inductor L1 and the ground; the capacitor C3 is connected in parallel between the output end of the common mode inductor L1 and the ground; the TVS tube D1 is connected in parallel between the input end of the common mode inductor L1 and the ground.

5. The high-integration level on-board charging module according to claim 1, characterized in that, The first Type-C interface and the second Type-C interface each include a Type-C connector, an ESD protection circuit and a signal line; The Type-C connector has a VBUS power supply pin, a CC configuration channel pin, a DP data positive pin and a DM data negative pin; The ESD protection circuit is composed of a TVS diode array, one end of which is connected to the data pin and the configuration channel pin of the Type-C connector, and the other end is grounded; The signal line includes a data signal line and a configuration channel signal line; a resistor is connected in series on the data signal line and the configuration channel signal line; a capacitor connected in parallel to the ground is also connected on the data signal line.

6. The high-integration level on-board charging module according to claim 2, wherein, The backlight interface includes at least one LED lamp and its series current limiting resistor; The anode of the LED lamp is connected to the power input end of the backlight interface through the current limiting resistor, and the cathode is grounded.

7. The high-integration level on-board charging module according to claim 1, wherein, The model of the first fast charging protocol chip is SC87550Q; the power input end of the first fast charging protocol chip is connected with the output end of the EMC protection circuit; the data pin and the configuration channel pin of the first fast charging protocol chip are respectively connected with the corresponding signal lines of the first Type C interface; and the power output end of the first fast charging protocol chip is connected with the VBUS pin of the first Type C interface.

8. The high-integration level on-board charging module according to claim 1, wherein, The model of the second fast charging protocol chip is CX8831; the power input end of the second fast charging protocol chip is connected with the output end of the EMC protection circuit; the data pin and the configuration channel pin of the second fast charging protocol chip are respectively connected with the corresponding signal lines of the second Type C interface; and the power output end of the second fast charging protocol chip is connected with the VBUS pin of the second Type C interface.

9. The high-integration level on-board charging module according to claim 1, wherein, The shielding cover is arranged in the shell of the high-integration vehicle-mounted charging module and covers the first fast charging protocol chip and the second fast charging protocol chip, so as to isolate electromagnetic interference and assist heat dissipation.

10. The high-integration level on-board charging module according to claim 9, characterized in that, The protection level of the shell is IP5K2.

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