A mobile power supply with standard PD docking station function and inversion function and an implementation method thereof

Abstract

The present application relates to the technical field of mobile power supply, and particularly discloses a mobile power supply with standard PD docking station function and inversion function and an implementation method, wherein the mobile power supply with standard PD docking station function and inversion function is provided with an uplink Type-C interface, a downlink Type-C interface, and a first function circuit and a second function circuit electrically connected to the uplink Type-C interface and the downlink Type-C interface respectively, can supply power externally or charge a battery pack through the uplink Type-C interface, and can supply power externally through the downlink Type-C interface; the uplink Type-C interface and the downlink Type-C interface can also perform USB data transmission and DP video data transmission; by integrating power supply, docking station data transmission and AC inversion function, the number of devices required for outdoor operation and wiring is reduced, lightweight integrated design is realized, carrying and deployment costs are reduced, and use efficiency is improved; in addition, synchronous operation of standard PD protocol power supply and USB / DP data transmission of the two downlink Type-C interfaces can be realized, and actual needs of multi-peripheral standard PD power supply and data interaction are met.

Description

Technical Field

[0001] This invention relates to the field of mobile power technology, specifically to a mobile power supply with standard PD docking station and inverter functions, and a method for implementing it. Background Technology

[0002] In fields such as photography, videography, film and television production, and outdoor work, portable power banks are commonly used and necessary equipment. Traditional single-function devices can no longer meet user needs, especially in scenarios such as outdoor office work, professional imaging, and emergency power supply, where users require multi-functional integrated solutions.

[0003] The existing technology has the following main shortcomings: First, the devices are functionally separate, resulting in poor outdoor portability. In outdoor shooting and live streaming scenarios, users need to carry multiple independent devices such as power banks, Type-C interface docking stations, and DC-AC inverters. The large number of devices, their bulky size, and the complicated wiring severely reduce the portability and flexibility of outdoor operations, failing to meet the lightweight requirements of mobile creation. Second, the downlink interface function is fixed, making it impossible to achieve standard PD protocol power supply and data synchronization. In existing power banks with integrated docking station functions, the high-speed data transmission capability of the downlink Type-C interface and the standard PD protocol power supply function cannot be activated simultaneously. They only support a single function mode and cannot simultaneously meet the requirements for data interaction and standard PD protocol power supply. Summary of the Invention

[0004] The present invention aims to provide a mobile power supply with standard PD docking station function and inverter function and its implementation method, so as to solve the technical problem that existing mobile power supplies cannot simultaneously achieve outdoor portability, multi-port standard PD protocol power supply, high-speed data pass-through, and AC inverter output.

[0005] Current outdoor work scenarios require standard PD protocol power supply, high-speed USB / DP data transmission, multi-device expansion, and integrated AC power output. However, the functions of current power banks, Type-C docking stations, and DC-AC inverters on the market are independent and cannot be integrated. This leads to two difficulties: First, carrying multiple devices separately results in bulky overall size and complex wiring, seriously affecting the convenience and continuity of outdoor work. Second, even if some products attempt to integrate docking stations and functions, their downstream Type-C interfaces still have fixed functions. High-speed data transmission and standard PD protocol power supply cannot be achieved in parallel; they can only switch between the two. This makes it difficult to simultaneously support data interaction of multiple peripherals and standard PD protocol power supply, and it cannot meet the integrated and efficient use requirements of outdoor creative scenarios.

[0006] This invention proposes a solution to the aforementioned problems. By constructing a hardware architecture integrating power supply, high-speed docking station, and AC inverter, and providing a standard PD protocol power supply and data collaborative interaction control method, this invention overcomes the shortcomings of existing technologies. This mobile power supply, which integrates standard PD protocol docking station and inverter functions, improves integration, outdoor portability, and usage efficiency. It integrates power supply, docking station data transmission, and AC inverter functions into one unit, reducing the number of devices and wiring, achieving lightweight and integrated design, lowering carrying and deployment costs, and improving outdoor operation efficiency. It enables parallel power supply and data transmission via the downlink Type-C interface of the docking station using the standard PD protocol, allowing the downlink interface to simultaneously output PD fast charging power and perform USB / DP data transmission, solving the problem of choosing one function at a time and meeting the needs of multiple peripherals for simultaneous power supply and data interaction.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: Design a mobile power supply with standard PD docking function and inverter function, including a housing, in which a battery pack and a circuit board are arranged, and the battery pack is equipped with BMS circuit; The housing is provided with an upstream Type-C interface and a downstream Type-C interface; the circuit board is provided with a first functional circuit and a second functional circuit electrically connected to the upstream Type-C interface and the downstream Type-C interface, respectively; the first functional circuit and the second functional circuit are electrically connected to the BMS circuit, enabling power supply or charging of the battery pack through the upstream Type-C interface, and power supply through the downstream Type-C interface and the USB-A interface; the upstream Type-C interface and the downstream Type-C interface communicate with each other through the first functional circuit and the second functional circuit, enabling USB data transmission and DP video data transmission between the upstream Type-C interface and the downstream Type-C interface; An AC interface is also provided on the housing, and an AC inverter electrically connected to the AC interface is provided inside the housing. The AC interface is electrically connected to the BMS circuit through the AC inverter.

[0008] Furthermore, the first functional circuit includes a DC-DC circuit 1, an analog switch chip U1, a PD protocol chip U6, a USB PD controller U3, a signal switching switch chip U2, a video conversion chip U4, and a USB HUB controller U5; The second functional circuit includes a DC-DC circuit 2 and a USB PD controller U7; The uplink Type-C interface is electrically connected to the BMS circuit of the battery pack through the DC-DC circuit 1; the PD protocol chip U6 is electrically connected to the DC-DC circuit 1, the analog switch chip U1, and the USB PD controller U3 respectively; the USB PD controller U3 is electrically connected to the analog switch chip U1, the signal switching switch chip U2, the USB HUB controller U5, and the video conversion chip U4 respectively. The uplink Type-C interface is electrically connected to the video conversion chip U4 and the USB HUB controller U5 respectively through the signal switching chip U2. The video conversion chip U4 and the USB HUB controller U5 are electrically connected to the downlink Type-C interface respectively through the USBPD controller U7. The uplink Type-C interface and the downlink Type-C interface are electrically connected to the video conversion chip U4 respectively through the SBU-up and SBU-down auxiliary signal channels. The downlink Type-C interface is electrically connected to the BMS circuit of the battery pack via the DC-DC circuit 2.

[0009] Furthermore, there are two downlink Type-C interfaces, and two sets of the second functional circuits are provided accordingly; The casing is also equipped with a USB-A interface, and the circuit board is equipped with a USB-A circuit that is electrically connected to the USB-A interface. The USB-A interface is electrically connected to the BMS circuit of the battery pack through the USB-A circuit, so that power can be supplied to the outside through the USB-A interface.

[0010] Furthermore, the circuit board is also provided with a main control circuit and a charge / discharge switching circuit, and the main control circuit and the BMS circuit are electrically connected to the charge / discharge switching circuit respectively.

[0011] Furthermore, a first cascade interface is provided on the upper side of the housing, and a second cascade interface is provided on the lower side of the housing. The first cascade interface and the second cascade interface are respectively provided with electrical connection terminals. The electrical connection terminals in the first cascade interface include a charging spring, a discharging spring, a communication spring, and a GND pin. The electrical connection terminals in the second cascade interface include a charging spring, a discharging spring, a communication spring, and a GND pin. A cascaded control circuit is provided on the circuit board. The main control circuit and the BMS circuit are electrically connected to the cascaded control circuit respectively. The main control circuit includes a main control chip MCU. The communication pin and the communication spring are electrically connected to the main control chip MCU so as to control the status of the first cascaded interface and the second cascaded interface through the cascaded control circuit according to the signals of the communication pin and the communication spring. An upper positioning magnet and a lower positioning magnet are respectively provided on the upper and lower sides of the outer casing.

[0012] Furthermore, the charge / discharge switching circuit includes a back-to-back series MOSFET Q7 and a MOSFET Q18. The discharge terminal of the BMS circuit outputs power through the MOSFETs Q7 and Q18. The control terminals of the MOSFETs Q7 and Q18 are pulled down to ground through the MOSFET Q17. The control terminal of the MOSFET Q17 is electrically connected to the main control chip MCU. The charge / discharge switching circuit also includes MOSFETs Q6 and Q5 connected in series back to back. The charging terminal of the BMS circuit charges the battery pack through MOSFETs Q6 and Q5. The control terminals of MOSFETs Q6 and Q5 are pulled down to ground through MOSFET Q9. The control terminal of MOSFET Q9 is pulled down to ground through MOSFET Q10. The control terminal of MOSFET Q10 is electrically connected to the main control chip MCU. The charge / discharge switching circuit also includes a voltage sampling circuit electrically connected to the main control chip MCU, which is used to collect the voltage at the discharge terminal of the BMS circuit.

[0013] Furthermore, the cascaded control circuit includes a MOS transistor Q14 electrically connected to the charging terminal of the BMS circuit, and the MOS transistor Q14 is electrically connected to the charging spring and the charging spring via a diode D4; The cascaded control circuit also includes a MOS transistor Q16 electrically connected to the discharge terminal of the BMS circuit. The other end of the MOS transistor Q16 is electrically connected to a diode D5. The discharge spring is electrically connected to the diode D5 via diode Q15, and the discharge spring is electrically connected to the diode D5 via diode Q17. The control terminals of MOSFETs Q14, Q16, Q15, and Q17 are all electrically connected to the main control chip MCU.

[0014] Furthermore, an AC output control switch is provided on the housing, and the AC inverter is electrically connected to the BMS circuit through the AC output control switch.

[0015] Furthermore, a capacity indicator light and a capacity indicator button are provided on the housing, and a capacity indicator light driving circuit that is electrically connected to the BMS circuit of the battery pack is provided on the circuit board. The capacity indicator button and the capacity indicator light are electrically connected to the capacity indicator light driving circuit. The BMS circuit includes a BQ4050 chip and its peripheral circuits. The peripheral circuits of the BMS circuit include an electronic fuse connected to the output terminal of the battery pack. The BQ4050 chip is electrically connected to the electronic fuse via an electronic switch.

[0016] This invention also provides a method for realizing a portable power bank with standard PD docking station and inverter functions. The method uses the portable power bank with standard PD docking station and inverter functions described above, and includes: Implementation of standard PD docking station functions: The uplink Type-C interface is connected to the data output device, and the downlink Type-C interface is connected to the data receiving device; the USB PD controller U3 communicates with the video conversion chip U4, the USB HUB controller U5, and the PD protocol chip U6 respectively to regulate power supply and data transmission. Firstly, the PD protocol chip U6 negotiates the PD power supply with the data output device connected to the uplink Type-C interface through the CC pin, and the PD protocol chip U6 controls the DCDC circuit 1 to supply power to the data output device connected to the uplink Type-C interface; Secondly, the USB PD controller U7 integrates signal path switching and PD protocol functions. The USB PD controller U7 determines whether the external data receiving device is a DP device or a USB device through the CC pin and SBU pin of the downlink Type-C interface, and then controls the type of data interaction between the uplink Type-C interface and the downlink Type-C interface through the USB PD controller U3. Thirdly, the USB PD controller U7 also has PD protocol function, that is, the USB PD controller U7 can control the DC-DC circuit 2 to provide PD protocol power to the data receiving device connected to the downlink Type-C interface, and negotiate the PD power supply through the CC pin; Implementation of inverter function: The AC interface is connected to the power receiving device, and the AC inverter converts the DC power output from the BMS circuit of the battery pack into AC power to power the power receiving device. The method also includes: Battery pack charging: When an external charger is connected to the uplink Type-C interface, the PD protocol chip U6 controls the analog switch chip U1 to switch the CC pin of the uplink Type-C interface to the PD protocol chip U6. The PD protocol chip U6 controls the DC-DC circuit 1 to enable the charger to charge the battery pack. In addition, during the charging process, the PD protocol chip U6 communicates with the video conversion chip U4 and the USB HUB controller U5 respectively, interrupting the USB data and DP data transmission of the video conversion chip U4 and the USB HUB controller U5. DC pure power supply mode: When the upstream Type-C interface or the downstream Type-C interface is connected to a load, the PD protocol chip U6 and the USB PD controller U7 negotiate the PD power supply power respectively, and control the DC-DC circuit 1 and DC-DC circuit 2 respectively to convert the voltage of the battery pack into the PD voltage required by the load, so as to realize external DC power supply.

[0017] Based on the above, compared with the prior art, the beneficial effects of the present invention are as follows: The power bank with standard PD docking station function and inverter function is provided with an upstream Type-C interface and a downstream Type-C interface on the circuit board, and a first functional circuit and a second functional circuit are respectively electrically connected to the upstream Type-C interface and the downstream Type-C interface on the circuit board. The first functional circuit and the second functional circuit are respectively electrically connected to the BMS circuit, so that it can supply power to the outside or charge the battery pack through the upstream Type-C interface, and can supply power to the outside through the downstream Type-C interface; the upstream Type-C interface and the downstream Type-C interface communicate with each other through the first functional circuit and the second functional circuit, so that the upstream Type-C interface and the downstream Type-C interface can perform USB data transmission and DP video data transmission. This portable power bank, featuring standard PD docking and inverter functions, integrates power supply, docking data pass-through, and AC inverter capabilities. This reduces the number of devices and cabling required for outdoor operations, achieving a lightweight, integrated design that lowers carrying and deployment costs and improves efficiency. Furthermore, it enables simultaneous operation of standard PD protocol power supply via two downlink Type-C interfaces and USB / DP data transmission, breaking the limitation of choosing one function over the other and meeting the practical needs of multiple peripherals for standard PD power supply and data interaction. Attached Figure Description

[0018] The present invention will be explained in detail below with reference to the accompanying drawings. It should be noted that the drawings are used to provide a further understanding of the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but should not impose any limitation on the implementability of the present invention.

[0019] In the attached diagram: Figure 1 This is one of the three-dimensional structural schematic diagrams of a mobile power supply with standard PD docking station function and inverter function according to an embodiment of the present invention.

[0020] Figure 2 This is a second three-dimensional structural schematic diagram of an embodiment of the mobile power supply with standard PD docking station function and inverter function according to the present invention.

[0021] Figure 3 This is an exploded view of an embodiment of the mobile power supply of the present invention, which has standard PD docking station function and inverter function.

[0022] Figure 4 This is a schematic diagram of the power conversion section in one embodiment of a mobile power supply with standard PD docking and inverter functions according to the present invention.

[0023] Figure 5 This is a diagram illustrating the architecture of the first and second functional circuits in one embodiment of a mobile power supply with standard PD docking and inverter functions according to the present invention.

[0024] Figure 6 This is a circuit diagram of the cascading interface in one embodiment of a mobile power supply with standard PD docking and inverter functions according to the present invention.

[0025] Figure 7 This is a circuit diagram illustrating the electrical connection of two cascaded power supplies in one embodiment of a mobile power supply with standard PD docking and inverter functions according to the present invention.

[0026] Figure 8 This is a circuit diagram of the BMS circuit in one embodiment of a mobile power supply with standard PD docking station and inverter functions according to the present invention.

[0027] Figure 9 This is a circuit diagram of the charge / discharge switching circuit in the BMS circuit of a mobile power supply with standard PD docking station and inverter functions according to an embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0029] In one embodiment, a mobile power supply with standard PD docking station functionality and inverter functionality is provided, such as... Figure 1 As shown, the power bank with standard PD docking and inverter functions includes a housing 10, such as... Figure 3 As shown, a battery pack 20 and a circuit board 30 are provided in the housing 10. The battery pack 20 has four battery cells and also includes a BMS circuit for managing the battery pack 20. Figure 8 As shown, the BMS circuit is based on the BQ4050 chip. The BQ4050 chip and peripheral circuit devices constitute the BMS circuit. It has four functions: power calculation, complete protection functions (overcharge protection, over-discharge protection, short circuit protection, overcurrent protection, temperature protection, etc.), cell balancing, and communication.

[0030] Combination Figure 1 As shown, the housing 10 is provided with an upstream Type-C interface 31, a downstream Type-C interface 32 and a USB-A interface 33. There are two downstream Type-C interfaces 32. These interfaces are all set on the circuit board 30 and exposed from the side of the housing 10. The upstream Type-C interface 31, the downstream Type-C interface 32 and the USB-A interface 33 are located on the side of the housing 10 for use.

[0031] Combination Figure 4-5 As shown, the circuit board 30 is provided with a first functional circuit, a second functional circuit, and a USB-A circuit that are electrically connected to the upstream Type-C interface 31, the downstream Type-C interface 32, and the USB-A interface 33, respectively. The first functional circuit, the second functional circuit, and the USB-A circuit are electrically connected to the BMS circuit, so that power can be supplied to the outside or the battery pack 20 can be charged through the upstream Type-C interface 31, and power can be supplied to the outside through the downstream Type-C interface 32 and the USB-A interface 33, thus meeting the high power supply requirements.

[0032] exist Figure 4 In the middle, the two downlink Type-C interfaces 32 are downlink Type-C interface 1 and downlink Type-C interface 2, respectively. There are two sets of second function circuits, namely second function circuit 1 and second function circuit 2, and the two sets of second function circuits have the same function.

[0033] Combination Figure 5 As shown, the upstream Type-C interface 31 and the downstream Type-C interface 32 communicate through the first functional circuit and the second functional circuit, enabling USB data transmission and DP video data transmission between the upstream Type-C interface 31 and the downstream Type-C interface 32, thereby giving the power bank the function of a standard PD docking station.

[0034] The standard PD docking station function allows it to provide PD protocol power to external devices such as monitors and external hard drives via this mobile circuit. It also enables high-speed data transmission via USB Gen3.2 protocol and video pass-through via DP1.4 protocol. Of course, this power bank is also compatible with the common need to provide pure power to devices via the upstream Type-C interface, two downstream Type-C interfaces, or USB-A interface.

[0035] Specifically, such as Figure 5As shown, the first functional circuit of this mobile power bank with standard PD docking and inverter functions includes a DC-DC circuit 1, an analog switch chip U1, a PD protocol chip U6, a USB PD controller U3, a signal switching switch chip U2, a video conversion chip U4 (DP Alt Mode video conversion chip U4), and a USB HUB controller U5; the second functional circuit has two sets, the second functional circuit 1 includes a DC-DC circuit 2 and a USB PD controller U7; the second functional circuit 2 includes a DC-DC circuit 3 and a USB PD controller U8.

[0036] Among them, such as Figure 5 As shown, the upstream Type-C interface is electrically connected to the BMS circuit of the battery pack through DC-DC circuit 1; the PD protocol chip U6 is electrically connected to DC-DC circuit 1, analog switch chip U1, and USB PD controller U3 respectively; the USB PD controller U3 is electrically connected to analog switch chip U1, signal switching switch chip U2, USB HUB controller U5, and video conversion chip U4 respectively; the upstream Type-C interface is electrically connected to video conversion chip U4 and USB HUB controller U5 through signal switching switch chip U2 respectively, and video conversion chip U4 and USB HUB controller U5 are electrically connected to downstream Type-C interface 1 through USB PD controller U7 respectively; video conversion chip U4 and USB HUB controller U5 are also electrically connected to downstream Type-C interface 2 through USB PD controller U8 respectively; USB HUB controller U5 is electrically connected to downstream Type-C interface 1 and downstream Type-C interface 2 through signal lines DP / DM-1 and DP / DM-2 respectively, and the DP / DM signal lines serve as the data transmission channel for USB 2.0.

[0037] The uplink Type-C interface and the downlink Type-C interface are electrically connected to the video conversion chip U4 through the SBU-up and SBU-down auxiliary signal channels, respectively. The SBU-down auxiliary signal channel includes the SBU-1 auxiliary signal channel and the SBU-2 auxiliary signal channel. Downlink Type-C interface 1 is connected to the video conversion chip U4 through the USB PD controller U7 and the SBU-1 auxiliary signal channel; downlink Type-C interface 2 is connected to the video conversion chip U4 through the USB PD controller U8 and the SBU-2 auxiliary signal channel.

[0038] Downlink Type-C interface 1 is electrically connected to the battery pack's BMS circuitry via DC-DC circuit 2; downlink Type-C interface 2 is electrically connected to the battery pack's BMS circuitry via DC-DC circuit 3. The USB-A circuitry also includes a separate DC-DC circuitry (in...). Figure 5(Not shown in the image), so that the output voltage of the BMS circuit is converted and output through the USB-A interface 33 for external power supply.

[0039] The analog switch chip U1 can be a CH444P chip, the signal switching switch chip U2 can be a VL171 chip, the USB PD controller U3 can be a VL109 chip, the video conversion chip U4 can be a VMM5220 chip, the USB HUB controller U5 can be a VL822 chip, the PD protocol chip U6 can be a CS32G020K8U6 chip, and the USB PD controller U7 and USB PD controller U8 can be EJ732I chips.

[0040] In addition, such as Figure 1-3 As shown, an AC interface 40 is also provided on the housing 10, and an AC inverter 41 electrically connected to the AC interface 40 is provided inside the housing 10. The AC interface 40 is electrically connected to the BMS circuit through the AC inverter 41.

[0041] AC interface 40 is a 3-pin AC interface, which is embedded in the outer casing 10. AC inverter 41 is a DC-AC inverter module, which is used to convert the DC power of the cells in the battery pack 20 into 120V / 60HZ AC power, which is output through AC interface 40 to power AC loads such as laptops, lamps, and small appliances.

[0042] The AC inverter 41 uses a common low-power product for power supply. It has an isolation transformer inside, so although there is no ground wire, it can ensure electrical safety. Combination Figure 5 As shown, the circuit working principle of this mobile power supply with standard PD docking station and inverter functions is as follows: The battery pack 20 is an energy storage unit. Its positive and negative terminals are electrically connected to the input terminals of the DC-DC circuit 1 of the upstream Type-C interface 31, the DC-DC circuit 2 and DC-DC circuit 3 of the two downstream Type-C interfaces 32, and the DC-DC circuit of the USB-A interface 33, respectively, to provide input power to each power supply branch.

[0043] In this circuit, the input of DC-DC circuit 1 is connected to the battery pack, and the output is connected to the upstream Type-C interface. DC-DC circuit 1 is controlled by PD protocol chip U6, which is used to perform buck-boost conversion between the battery pack voltage and the upstream Type-C interface voltage, enabling the upstream Type-C interface to support standard PD protocol charging / discharging. The PD protocol chip U6 is specifically responsible for managing the fast charging protocol of the upstream Type-C interface. It communicates with the device or charger plugged into the upstream Type-C interface, automatically identifies and negotiates the optimal charging voltage and current supported by both parties, and then directly controls the buck-boost circuit in DC-DC circuit 1 to achieve charging and discharging.

[0044] The input of DCDC circuit 2 is connected to the battery pack, and the output is connected to the downstream Type-C interface 1. DCDC circuit 2 is controlled by USBPD controller U7 to realize the step-up and step-down conversion between the battery pack voltage and the downstream Type-C interface 1 voltage, so that the downstream Type-C interface 1 supports the voltage output of the standard PD protocol.

[0045] The input of DCDC circuit 3 is connected to the battery pack, and the output is connected to the downstream Type-C interface 2. DCDC circuit 2 is controlled by USBPD controller U8 to realize the step-up and step-down conversion between the battery pack voltage and the downstream Type-C interface 2 voltage, so that the downstream Type-C interface 2 supports the voltage output of the standard PD protocol.

[0046] For the DC-DC circuit of the USB-A interface (not shown in the figure), the input terminal is also connected to the battery pack, and the output terminal is connected to the USB-A interface, providing a fixed 5V / 2A power supply to provide stable power to the devices connected to the USB-A interface.

[0047] One end of the analog switch chip U1 is electrically connected to the CC pin of the uplink Type-C interface 31 (the CC pin in this article is the pin used for power and role recognition), and the other end is electrically connected to the CC pin of the USB PD controller U3 or the CC pin of the PD protocol chip U6. It is used to negotiate PD power and role recognition with the external device connected to the uplink Type-C interface 31. Depending on the type of device connected to the uplink Type-C interface 31 (charger, mobile phone, computer, hard drive, etc.), it determines whether to charge the battery pack 20 of the power bank through the charger or to supply power to the outside through the battery pack 20, as well as to control the data transmission of the device through the uplink Type-C interface 31.

[0048] exist Figure 5In the circuit, the USB PD controller U3 is the core control unit. The USB PD controller U3 communicates with the PD protocol chip U6, and the CC pin of the USB PD controller U3 or the PD protocol chip U6 is connected to the CC pin of the uplink Type-C interface through the analog switch chip U1. This is used to identify the external device connected to the uplink Type-C interface through the USB PD controller U3, and to negotiate the power supply of the PD protocol based on the identified role. According to the role identification result and the negotiated power supply, the USB PD controller U3 then controls the DC-DC circuit 1 through the PD protocol chip U6, so that the battery pack discharges to the uplink Type-C interface through the DC-DC circuit 1 according to the negotiated power, or so that the uplink Type-C interface charges the battery pack through the DC-DC circuit 1 according to the negotiated power.

[0049] like Figure 5 As shown, the USB PD controller U3 also communicates with the video conversion chip U4 (DP Alt Mode video conversion chip U4) and the USB HUB controller U5. The control signal output terminal of the USB PD controller U3 is connected to the signal switching switch chip U2 to regulate the DP data and USB data from the upstream Type-C interface. The DP data is digital audio and video transmission data based on the DisplayPort protocol, and the USB data is data based on the USB protocol. That is, two types of data can be transmitted through the upstream Type-C interface.

[0050] like Figure 5 As shown, the input terminal of the video conversion chip U4 is connected to the TX / RX-1 terminal of the signal switching chip U2, and the output terminal is connected to the TX / RX-11 terminal of the USB PD controller U7. This is used to parse the DP AltMode video signal transmitted via the uplink Type-C interface, enabling video projection. The input terminal of the USB HUB controller U5 is connected to the TX / RX-2 terminal of the signal switching chip U2, and the output terminal is connected to the TX / RX-21 terminal of the USB PD controller U7. This is used to transmit USB data input via the uplink Type-C interface. The video conversion chip U4 is also connected to the uplink Type-C interface and the downlink Type-C interface 1 respectively via two auxiliary video transmission signal channels, SBU-up and SBU-1, for transmitting auxiliary channel signals.

[0051] For downlink Type-C interface 2, such as Figure 5As shown, the input terminal of the video conversion chip U4 is connected to the TX / RX-1 terminal of the signal switching chip U2, and the output terminal is connected to the TX / RX-12 terminal of the USB PD controller U8. This is used to parse the DP Alt Mode video signal transmitted via the uplink Type-C interface, enabling video projection. The input terminal of the USB HUB controller U5 is connected to the TX / RX-2 terminal of the signal switching chip U2, and the output terminal is connected to the TX / RX-22 terminal of the USB PD controller U8. This is used to transmit USB data input via the uplink Type-C interface. The video conversion chip U4 is also connected to the uplink Type-C interface and the downlink Type-C interface 2 respectively via two auxiliary video transmission signal channels, SBU-up and SBU-2, for transmitting auxiliary channel signals. The SBU pin is used to transmit the auxiliary control channel of the DP protocol when transmitting video signals, responsible for carrying important data such as device connection management and EDID information reading.

[0052] The core function of the signal switching chip U2 is to manage and switch between DP video signals and USB data signals from the uplink Type-C interface, and to realize automatic identification and path selection of DP Alt Mode and USB high-speed data mode.

[0053] Based on the circuit above, the functions of each interface are as follows: The uplink Type-C interface is a bidirectional interface. It can be used as an input port to connect a charger to charge its own battery pack 20, or as an output port or host interface to connect mobile phones, computers and other devices, realizing the functions of reverse power supply and data / video data transmission.

[0054] Two downstream Type-C ports are used to connect external hard drives or monitors. While powering devices connected via the downstream Type-C ports, the power bank can also transmit USB 3.2 Gen2 and DP 1.4 video data. In addition, it can also power numerous other Type-C devices that require power, in addition to these two types of devices.

[0055] The USB-A interface is designed to provide a standard 5V / 2A power supply for devices with a USB-A port.

[0056] The power bank, which features standard PD docking and inverter functions, operates in the following modes: (1) Battery charging mode: When an external charger is connected to the uplink Type-C interface, the PD protocol chip U6 controls the analog switch chip U1 to switch the CC pin of the uplink Type-C interface to the PD protocol chip U6. The PD protocol chip U6 controls the DCDC circuit 1 to enable the charger to charge the battery pack 20. In addition, during the charging process, the PD protocol chip U6 communicates with the video conversion chip U4 and the USB HUB controller U5 respectively, interrupting the USB data and DP data transmission of the video conversion chip U4 and the USB HUB controller U5.

[0057] (2) Data Expansion and Multi-Device Power Supply Mode: When the uplink Type-C interface is connected to the host mobile phone and the downlink Type-C interface 1 (or downlink Type-C interface 2) is connected to the monitor, the core control unit USB PD controller U3 communicates with the video conversion chip U4, USB HUB controller U5 and PD protocol chip U6 respectively to regulate power supply and data transmission. On the one hand, the PD protocol chip U6 negotiates PD power with the device connected to the uplink Type-C interface through the CC pin, and the PD protocol chip U6 controls the DCDC circuit 1 to supply power to the device connected to the uplink Type-C interface; on the other hand, the USB PD controller U7 integrates MUX (Multiplexer, signal path switching) and PD functions. The USB PD controller U7 determines whether the external device is a DP device or a USB device through the CC pin, SBU and other pins of the downlink Type-C interface 1, and thus regulates the type of data interaction between the uplink Type-C interface and the downlink Type-C interface 1 through the USB PD controller U3; the USB PD controller U7 also has PD protocol function, that is, USB The PD controller U7 can control the DC-DC circuit 2 to provide PD protocol power to the devices connected to the downlink Type-C interface 1, and negotiate the PD power supply through the CC pin.

[0058] (3) Pure power supply mode: When the upstream Type-C interface or the downstream Type-C interface 1 and downstream Type-C interface 2 are connected to the load, the PD protocol chip U6, USB PD controller U7 and USB PD controller U8 negotiate the PD power supply power respectively, and control the DC-DC circuit 1, DC-DC circuit 2 and DC-DC circuit 3 respectively to convert the voltage of the battery pack 20 into the PD voltage required by the load to achieve fast charging; the USB-A interface is provided with 5V / 2A power by its corresponding DC-DC circuit to power the load connected to it.

[0059] The power bank, which has standard PD docking and inverter functions, also has a main control circuit and a charge / discharge switching circuit on the circuit board 30. The main control circuit and the BMS circuit are electrically connected to the charge / discharge switching circuit respectively.

[0060] The charge / discharge switching circuit is electrically connected to the battery pack 20 through the BMS circuit, and the main control circuit controls the charging and discharging process of the battery pack 20 by controlling the state of the charge / discharge switching circuit.

[0061] Specifically, in combination Figure 6 As shown, the main control circuit includes a main control chip MCU set on the circuit board 30.

[0062] like Figure 9 As shown, Figure 9 The circuit board 30 is a charge / discharge switching circuit electrically connected to the BMS circuit. The charge / discharge switching circuit includes MOSFETs Q7 and Q18 connected in series back to back. The discharge terminal of the BMS circuit outputs power through MOSFETs Q7 and Q18. The control terminals of MOSFETs Q7 and Q18 are pulled down to ground through MOSFET Q17. The control terminal of MOSFET Q17 is electrically connected to the main control chip MCU. The charge / discharge switching circuit also includes MOSFETs Q6 and Q5 connected in series back to back. The charging terminal of the BMS circuit charges the battery pack through MOSFETs Q6 and Q5. The control terminals of MOSFETs Q6 and Q5 are pulled down to ground through MOSFET Q9. The control terminal of MOSFET Q9 is pulled down to ground through MOSFET Q10. The control terminal of MOSFET Q10 is electrically connected to the main control chip MCU.

[0063] The charge / discharge switching circuit also includes a voltage sampling circuit electrically connected to the main control chip MCU. This voltage sampling circuit is used to collect the voltage of the discharge terminal (PACK+) of the BMS circuit. The voltage sampling circuit includes resistors R165 and R166 connected in series, and capacitor C107 connected in parallel across resistor R166. The input terminal of resistor R165 is electrically connected to the discharge terminal (PACK+) of the BMS circuit, and the PACK-AD terminal of the main control chip MCU is electrically connected between resistors R165 and R166.

[0064] Figure 9 The DSG / CHG-EN terminal is electrically connected to Figure 6 The main control chip MCU (microcontroller) controls the signal of the DSG / CHG-EN terminal to be high or low level. Figure 9 The PACK-CHG+ and PACK-DSG terminals are electrically connected to Figure 8 The middle PACK-CHG+ terminal and PACK-DSG terminal. Figure 5 The DC-DC circuits 1, 2, and 3 in the DCDC circuit, as well as the DC-DC circuit of the USB-A, are all connected to... Figure 9 The PACK+ terminal of the intermediate circuit.

[0065] Figure 9 The circuit principle is: Portable power banks are normally in a discharging state, meaning they are powered by electricity generated from water. Figure 6 The DSG / CHG-EN control signal of the main control chip MCU is high at this time. Figure 9 MOSFETs Q17, Q18, and Q7 are all turned on, and the battery pack outputs power through the BMS circuit and terminal PACK+. Figure 5 The DCDC circuits 1, 2, and 3, as well as the DCDC circuit of the USB-A interface, allow the upstream Type-C interface, downstream Type-C interface 1, downstream Type-C interface 2, and USB-A interface to supply power to external devices. Since DSG / CHG-EN is at a high level, after MOSFET Q10 is turned on, the driving terminal of MOSFET Q9 is at a low level, and MOSFETs Q9, Q5, and Q6 are not turned on. At this time, the charging circuit of battery pack 20 is closed.

[0066] The power bank's upstream Type-C port 31 supports charging via an external charger, while the downstream Type-C port 32 does not. The USB PD controllers U7 and U8 of the downstream Type-C port 32 are only configured for discharge mode. When a charger is connected to the upstream Type-C port 31, at this time... Figure 9 The PACK+ terminal in the circuit represents the battery's charging voltage. This voltage is sampled by the PACK-AD terminal between resistors R165 and R166 and sent to the main control chip MCU. The MCU determines that the voltage has reached the charging voltage value and then sends a low-level signal to its DSG / CHG-EN control terminal. Figure 9 When MOSFETs Q7 and Q18 are turned off, and MOSFETs Q5 and Q6 are turned on, the discharge circuit is closed and the charging circuit is open.

[0067] The main control chip MCU determines charging and discharging as follows: Battery pack 20 consists of 4 cells in series. The fully charged voltage of the battery pack is 16.8V (Battery pack 20 generally does not fully charge to 16.8V, reaching a maximum of around 16.6V, and after removing the charger, the battery pack voltage will drop back to around 16.3-16.5V within a few minutes). The voltage provided by the charger is 16.8V. Therefore, if the voltage at the PACK+ terminal is between 16.6V and 16.9V, the main control chip MCU considers it to be connected to the charger and switches to charging. Otherwise, it is discharging, thus realizing the determination of charging and discharging voltage.

[0068] Furthermore, such as Figure 1-2 As shown, the power bank with standard PD docking station function and inverter function has a first cascade interface 34 on the upper side of the housing 10 and a second cascade interface 35 corresponding to the first cascade interface 34 on the lower side of the housing 10. The first cascade interface 34 and the second cascade interface 35 are respectively provided with corresponding electrical connection terminals.

[0069] The first cascade interface 34 and the second cascade interface 35 are electrically connected to the circuit board 30 respectively. The upper and lower sides of the housing 10 are provided with openings corresponding to the first cascade interface 34 and the second cascade interface 35. The second cascade interface 35 of the first cascade interface 34 is used to allow two mobile power supplies with standard PD expansion dock function and inverter function to be connected vertically for cascade power supply.

[0070] When power banks are not cascaded, the electrical terminals of the second cascade interface 35 of the first cascade interface 34 have no output. When two power banks are cascaded together, the electrical terminals of the second cascade interface 35 of the first cascade interface 34 will only have output after the contact judgment pin receives the cascade signal. This can effectively protect the electrical circuits inside the power banks.

[0071] Specifically, such as Figure 6 As shown, the first cascade interface 34 is... Figure 6 The power bank's top shell spring pins, the second cascade interface 35 is... Figure 6 The power bank's bottom shell has spring contacts (the spring contacts and spring pins here are only for distinguishing terminals and do not represent the actual shape). The first cascade interface 34 has 2 charging spring pins (charging positive spring pins), 2 discharging spring pins (discharging positive spring pins), 1 communication spring pin, and 3 GND pins located on the upper side; the second cascade interface 35 has 2 charging spring contacts (charging positive spring contacts), 2 discharging spring contacts (charging positive spring contacts), 1 communication spring contact, and 3 GND pins located on the lower side; the communication spring pin and communication spring contacts are connected to the main control chip MCU in the main control circuit.

[0072] Combination Figure 7 As shown, when two such power banks (Power Bank 1 and Power Bank 2) are cascaded vertically, the bottom shell spring contact (second cascade interface) of Power Bank 1 will be electrically connected to the top shell spring pin (first cascade interface) of Power Bank 2.

[0073] A cascaded control circuit is provided on the circuit board, and the main control circuit and BMS circuit are electrically connected to the cascaded control circuit, such as... Figure 6 As shown, the cascaded control circuit includes a MOSFET Q14 electrically connected to the charging terminal of the BMS circuit. MOSFET Q14 is electrically connected to the charging spring and the charging contact via diode D4. The cascaded control circuit also includes a MOSFET Q16 electrically connected to the discharging terminal of the BMS circuit. The other end of MOSFET Q16 is electrically connected to diode D5. The discharging spring is electrically connected to diode D5 via diode Q15, and the discharging contact is electrically connected to diode D5 via diode Q17. The control terminals of MOSFETs Q14, Q16, Q15, and Q17 are all electrically connected to the main control chip MCU.

[0074] Combination Figure 6-7As shown, the working principle of the cascaded control circuit controlling the cascaded mobile power supply is as follows: like Figure 6 As shown, the charging positive electrode spring and the charging positive electrode contact are electrically connected to the charging terminal of the BMS circuit inside the power bank, and the discharging positive electrode spring and the discharging positive electrode contact are electrically connected to the discharging terminal of the BMS circuit inside the power bank; when the bottom shell contact of one power bank and the corresponding top shell contact of another power bank are aligned as shown... Figure 7 The corresponding connections shown are as follows: the charging positive contact spring and the charging positive contact spring of the two cascaded mobile power supplies are in contact with each other; the discharging positive contact spring and the discharging positive contact spring are in contact with each other; the communication contact spring and the communication contact spring are in contact with each other; and the GND contact spring and the GND contact spring are in contact with each other.

[0075] By default, two cascaded power banks are in a discharging state under normal conditions. At this time, the internal MOSFET Q16 is conducting and MOSFET Q14 is off. However, for safety protection, when not cascaded, MOSFETs Q15 and Q17 are disconnected, and the exposed discharge pins and contacts are de-energized. Only when the power banks are cascaded together does the main control chip (MCU) detect the communication pin signal and control MOSFETs Q15 and Q17 to conduct. The positive and negative terminals of the discharge terminals of the two cascaded power banks are electrically connected. At this time, the cascaded power banks can supply power to external devices, which can increase the battery life.

[0076] When one of the upstream Type-C ports of the cascaded power banks is connected to a charger, the power bank turns on MOSFET Q14 and turns off MOSFET Q16 by detecting the charging voltage. At this time, the power bank switches from discharging mode to charging mode, and the external charger connected to the upstream Type-C port can charge the cascaded power banks.

[0077] like Figure 3 As shown, the power bank with standard PD docking and inverter functions has an upper positioning magnet 13 and a lower positioning magnet 14 on the upper and lower sides of the outer casing 10, respectively. There are four upper positioning magnets 13 and four lower positioning magnets 14. The upper positioning magnets 13 and the lower positioning magnets 14 are used to attract the two power banks when they are cascaded.

[0078] like Figure 3 As shown, the circuit board 30 includes two layers, and the AD inverter 41 is sandwiched between the two layers of the circuit board 30 to improve the utilization of internal space.

[0079] like Figure 3As shown, the outer casing 10 includes an upper casing 11 and a lower casing 12. The outer casing 10 can be made of metal. The heat-generating components on the circuit board 30 can be concentrated on the circuit board 30 and contact the inner side of the upper casing 11 through a thermal pad (not shown in the figure). The battery pack 20 contacts the inner side of the lower casing 12 through a thermal pad to facilitate heat dissipation.

[0080] like Figure 8 As shown, terminals B1P, B2P, B3P, and B4P of the BMS circuit are connected to the battery cells of battery pack 20. The peripheral circuit of the BMS circuit includes an electronic fuse FB2 connected to the output terminal of battery pack 30. The BQ4050 chip is electrically connected to the electronic fuse FB2 (D6SC4-15) via an electronic switch. Specifically, as shown... Figure 8 As shown, the BFUSE terminal is connected to pin 25 of the BQ4050 chip through resistor R10 and diode D2 for temperature protection control. The drive signal of the BFUSE terminal controls the opening and closing of the electronic switch Q3 of the electronic fuse FB2. When the internal temperature of the power bank is too high, the electronic fuse FB2 can be opened to stop the discharge. Figure 8 J4 in the code is the program download interface for the BQ4050 chip.

[0081] like Figure 1-2 As shown, the power bank with standard PD docking station function and inverter function has a capacity indicator light 36 and a capacity indicator button 361 on the outer shell 10. The circuit board 30 has a capacity indicator light driving circuit that is electrically connected to the BMS circuit of the battery pack 20. The capacity indicator button 361 and the capacity indicator light 36 are electrically connected to the capacity indicator light driving circuit.

[0082] like Figure 6 As shown, in this embodiment, the capacity indicator light driving circuit is implemented by the main control chip MCU. The main control chip MCU communicates with the BMS circuit of the battery pack 20. The main control chip MCU obtains the capacity of the battery pack 20 through the BMS circuit of the battery pack 20. When the capacity indicator button 361 is pressed, the main control chip MCU controls the capacity indicator light 36 to light up. There are multiple capacity indicator lights 36. The greater the remaining power of the battery pack 20, the more capacity indicator lights 36 will light up.

[0083] In other embodiments, a data indicator light can also be provided. This data indicator light can be electrically connected to the USB PD controller U3 in the first functional circuit. During data transmission, the USB PD controller U3 controls the data indicator light to flash. The data indicator light flashes when communication occurs between the upstream Type-C interface 31 and the downstream Type-C interface 32, such as when the downstream Type-C interface 32 is connected to a portable hard drive for USB 3.2 Gen 2 data transmission, or when the downstream Type-C interface 32 is connected to a monitor for DP 1.4 video data transmission. This allows the user to easily observe the working status.

[0084] Based on the above embodiments, this power bank with standard PD docking and inverter functions not only provides PD protocol power supply through its upstream and downstream Type-C interfaces, but also integrates DP Alt video transmission and USB HUB data transmission. It achieves a four-in-one function of "charging / power supply / data / video" using only one upstream Type-C interface and one downstream Type-C interface, unlike traditional single power banks or those without a battery docking station. This meets users' needs for simultaneous data transmission and standard PD protocol power supply. The power bank can be stacked magnetically, allowing for expansion of the built-in battery pack by connecting multiple power banks magnetically, thus meeting users' high-power and long-lasting power requirements.

[0085] This portable power bank highly integrates battery energy storage, bidirectional PD charging and discharging, USB data expansion, and DP Alt Mode video output. It adopts a dual PD controller collaborative control, intelligent power path switching, and multi-channel independent DC-DC power supply architecture. It can achieve integrated operation of charging, power supply, data transmission, and video projection using only one upstream Type-C interface and one downstream Type-C interface. It effectively solves the shortcomings of traditional portable power banks with single functions and traditional docking stations with no portable battery life. At the same time, it has the advantages of automatic mode recognition and switching, stable and uninterrupted power supply, multi-port output without interference, and system safety and reliability. It significantly improves the integration, portability, and practicality of the device, and has better compatibility and user experience.

[0086] In one embodiment, a method is provided to enable a power bank to have standard PD docking and inverter functions. The method employs a power bank with standard PD docking and inverter functions as described in the preceding embodiments, and includes: The standard PD docking station function is implemented as follows: the uplink Type-C interface connects to the data output device, and the downlink Type-C interface connects to the data receiving device; the USB PD controller U3 communicates with the video conversion chip U4, the USB HUB controller U5, and the PD protocol chip U6 respectively to regulate power supply and data transmission; firstly, the PD protocol chip U6 negotiates the PD power supply with the data output device connected to the uplink Type-C interface through the CC pin, and controls the DC-DC circuit 1 to supply power to the data output device connected to the uplink Type-C interface; secondly, the USB PD controller U7 integrates signal path switching and PD protocol functions. The USB PD controller U7 determines whether the external data receiving device is a DP device or a USB device through the CC pin and SBU pin of the downlink Type-C interface, and thus regulates the type of data interaction between the uplink Type-C interface and the downlink Type-C interface through the USB PD controller U3; thirdly, the USB PD controller U7 also has PD protocol function, that is, the USB PD controller U7 can control the DC-DC circuit 2 to provide PD protocol power to the data receiving device connected to the downlink Type-C interface, and negotiate the PD power supply through the CC pin.

[0087] Inverter function implementation: The AC interface connects to the powered device, and the AC inverter converts the DC power output from the BMS circuit of the battery pack into AC power to power the powered device. The method also includes: Battery pack charging: When an external charger is connected to the uplink Type-C interface, the PD protocol chip U6 controls the analog switch chip U1 to switch the CC pin of the uplink Type-C interface to the PD protocol chip U6. The PD protocol chip U6 controls the DC-DC circuit 1 to enable the charger to charge the battery pack. In addition, during the charging process, the PD protocol chip U6 communicates with the video conversion chip U4 and the USB HUB controller U5 respectively, interrupting the USB data and DP data transmission of the video conversion chip U4 and the USB HUB controller U5. DC pure power supply mode: When the upstream Type-C interface or the downstream Type-C interface is connected to a load, the PD protocol chip U6 and the USB PD controller U7 negotiate the PD power supply power respectively, and control the DC-DC circuit 1 and DC-DC circuit 2 respectively to convert the voltage of the battery pack into the PD voltage required by the load, so as to realize external DC power supply.

[0088] Based on the above embodiments, it can be seen that the method for realizing a mobile power bank with standard PD docking station and inverter functions integrates power supply, docking station data pass-through and AC inverter functions, reduces the number of equipment and wiring required for outdoor operations, achieves lightweight integrated design, reduces carrying and deployment costs, and improves usage efficiency; it realizes the synchronous operation of standard PD protocol power supply and USB / DP data transmission through two downlink Type-C interfaces, breaks the limitation of choosing one of the two functions, and meets the actual needs of standard PD power supply and data interaction for multiple peripherals.

[0089] It should be noted that, unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains, and terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art. It should also be understood that the above is a description of the disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of the disclosure have been described, those skilled in the art will readily understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention. Therefore, all such modifications are intended to be included within the scope of the disclosure as defined in the claims, and will not be detailed here.

Claims

1. A portable power bank with standard PD docking station and inverter functions, comprising a housing, a battery pack and a circuit board disposed within the housing, the battery pack being provided with a BMS circuit, characterized in that: The housing is provided with an upstream Type-C interface and a downstream Type-C interface; the circuit board is provided with a first functional circuit and a second functional circuit electrically connected to the upstream Type-C interface and the downstream Type-C interface, respectively; the first functional circuit and the second functional circuit are electrically connected to the BMS circuit, enabling power supply or charging of the battery pack through the upstream Type-C interface, and power supply through the downstream Type-C interface and the USB-A interface; the upstream Type-C interface and the downstream Type-C interface communicate with each other through the first functional circuit and the second functional circuit, enabling USB data transmission and DP video data transmission between the upstream Type-C interface and the downstream Type-C interface; An AC interface is also provided on the housing, and an AC inverter electrically connected to the AC interface is provided inside the housing. The AC interface is electrically connected to the BMS circuit through the AC inverter.

2. The mobile power supply with standard PD docking station function and inverter function according to claim 1, characterized in that: The first functional circuit includes a DC-DC circuit 1, an analog switch chip U1, a PD protocol chip U6, a USB PD controller U3, a signal switching switch chip U2, a video conversion chip U4, and a USB HUB controller U5; The second functional circuit includes a DC-DC circuit 2 and a USB PD controller U7; The uplink Type-C interface is electrically connected to the BMS circuit of the battery pack through the DC-DC circuit 1; the PD protocol chip U6 is electrically connected to the DC-DC circuit 1, the analog switch chip U1, and the USB PD controller U3 respectively; the USB PD controller U3 is electrically connected to the analog switch chip U1, the signal switching switch chip U2, the USB HUB controller U5, and the video conversion chip U4 respectively. The uplink Type-C interface is electrically connected to the video conversion chip U4 and the USB HUB controller U5 via the signal switching chip U2, respectively. The video conversion chip U4 and the USB HUB controller U5 are electrically connected to the downlink Type-C interface via the USB PD controller U7, respectively. The uplink Type-C interface and the downlink Type-C interface are electrically connected to the video conversion chip U4 via the SBU-up and SBU-down auxiliary signal channels, respectively. The downlink Type-C interface is electrically connected to the BMS circuit of the battery pack via the DC-DC circuit 2.

3. The mobile power supply with standard PD docking station function and inverter function according to claim 1, characterized in that: The downlink Type-C interface is provided in two places, and the second functional circuit is provided in two sets accordingly; The casing is also equipped with a USB-A interface, and the circuit board is equipped with a USB-A circuit that is electrically connected to the USB-A interface. The USB-A interface is electrically connected to the BMS circuit of the battery pack through the USB-A circuit, so that power can be supplied to the outside through the USB-A interface.

4. The mobile power supply with standard PD docking station function and inverter function according to claim 1, characterized in that: The circuit board is also provided with a main control circuit and a charge / discharge switching circuit, and the main control circuit and the BMS circuit are electrically connected to the charge / discharge switching circuit respectively.

5. The mobile power supply with standard PD docking station function and inverter function according to claim 4, characterized in that: A first cascade interface is provided on the upper side of the housing, and a second cascade interface is provided on the lower side of the housing. The first cascade interface and the second cascade interface are respectively provided with electrical connection terminals. The electrical connection terminals in the first cascade interface include a charging spring, a discharging spring, a communication spring, and a GND pin. The electrical connection terminals in the second cascade interface include a charging spring, a discharging spring, a communication spring, and a GND pin. A cascaded control circuit is provided on the circuit board. The main control circuit and the BMS circuit are electrically connected to the cascaded control circuit respectively. The main control circuit includes a main control chip MCU. The communication pin and the communication spring are electrically connected to the main control chip MCU so as to control the status of the first cascaded interface and the second cascaded interface through the cascaded control circuit according to the signals of the communication pin and the communication spring. An upper positioning magnet and a lower positioning magnet are respectively provided on the upper and lower sides of the outer casing.

6. The mobile power supply with standard PD docking station function and inverter function according to claim 5, characterized in that: The charge / discharge switching circuit includes a back-to-back series MOSFET Q7 and a MOSFET Q18. The discharge terminal of the BMS circuit outputs power through the MOSFETs Q7 and Q18. The control terminals of the MOSFETs Q7 and Q18 are pulled down to ground through the MOSFET Q17. The control terminal of the MOSFET Q17 is electrically connected to the main control chip MCU. The charge / discharge switching circuit also includes MOSFETs Q6 and Q5 connected in series back to back. The charging terminal of the BMS circuit charges the battery pack through MOSFETs Q6 and Q5. The control terminals of MOSFETs Q6 and Q5 are pulled down to ground through MOSFET Q9. The control terminal of MOSFET Q9 is pulled down to ground through MOSFET Q10. The control terminal of MOSFET Q10 is electrically connected to the main control chip MCU. The charge / discharge switching circuit also includes a voltage sampling circuit electrically connected to the main control chip MCU, which is used to collect the voltage at the discharge terminal of the BMS circuit.

7. The mobile power supply with standard PD docking station function and inverter function according to claim 5, characterized in that: The cascaded control circuit includes a MOS transistor Q14 electrically connected to the charging terminal of the BMS circuit, and the MOS transistor Q14 is electrically connected to the charging spring and the charging spring via a diode D4. The cascaded control circuit also includes a MOS transistor Q16 electrically connected to the discharge terminal of the BMS circuit. The other end of the MOS transistor Q16 is electrically connected to a diode D5. The discharge spring is electrically connected to the diode D5 via diode Q15, and the discharge spring is electrically connected to the diode D5 via diode Q17. The control terminals of MOSFETs Q14, Q16, Q15, and Q17 are all electrically connected to the main control chip MCU.

8. The mobile power supply with standard PD docking station function and inverter function according to claim 1, characterized in that: An AC output control switch is provided on the housing, and the AC inverter is electrically connected to the BMS circuit through the AC output control switch.

9. The mobile power supply with standard PD docking station function and inverter function according to claim 1, characterized in that: The outer casing is provided with a capacitive indicator light and a capacitive indicator button. The circuit board is provided with a capacitive indicator light driving circuit that is electrically connected to the BMS circuit of the battery pack. The capacitive indicator button and the capacitive indicator light are electrically connected to the capacitive indicator light driving circuit. The BMS circuit includes a BQ4050 chip and its peripheral circuits. The peripheral circuits of the BMS circuit include an electronic fuse connected to the output terminal of the battery pack. The BQ4050 chip is electrically connected to the electronic fuse via an electronic switch.

10. A method for enabling a portable power bank to have standard PD docking station and inverter functions, characterized in that, This method uses the mobile power supply with standard PD docking station and inverter functions as described in claim 2, and the method includes: Implementation of standard PD docking station functions: The uplink Type-C interface is connected to the data output device, and the downlink Type-C interface is connected to the data receiving device; the USB PD controller U3 communicates with the video conversion chip U4, the USB HUB controller U5, and the PD protocol chip U6 respectively to regulate power supply and data transmission. Firstly, the PD protocol chip U6 negotiates the PD power supply with the data output device connected to the uplink Type-C interface through the CC pin, and the PD protocol chip U6 controls the DCDC circuit 1 to supply power to the data output device connected to the uplink Type-C interface; Secondly, the USB PD controller U7 integrates signal path switching and PD protocol functions. The USB PD controller U7 determines whether the external data receiving device is a DP device or a USB device through the CC pin and SBU pin of the downlink Type-C interface, and then controls the type of data interaction between the uplink Type-C interface and the downlink Type-C interface through the USB PD controller U3. Thirdly, the USB PD controller U7 also has PD protocol function, that is, the USB PD controller U7 can control the DC-DC circuit 2 to provide PD protocol power to the data receiving device connected to the downlink Type-C interface, and negotiate the PD power supply through the CC pin; Implementation of inverter function: The AC interface is connected to the power receiving device, and the AC inverter converts the DC power output from the BMS circuit of the battery pack into AC power to power the power receiving device. The method also includes: Battery pack charging: When an external charger is connected to the uplink Type-C interface, the PD protocol chip U6 controls the analog switch chip U1 to switch the CC pin of the uplink Type-C interface to the PD protocol chip U6. The PD protocol chip U6 controls the DC-DC circuit 1 to enable the charger to charge the battery pack. In addition, during the charging process, the PD protocol chip U6 communicates with the video conversion chip U4 and the USB HUB controller U5 respectively, interrupting the USB data and DP data transmission of the video conversion chip U4 and the USB HUB controller U5. DC pure power supply mode: When the upstream Type-C interface or the downstream Type-C interface is connected to a load, the PD protocol chip U6 and the USB PD controller U7 negotiate the PD power supply power respectively, and control the DC-DC circuit 1 and DC-DC circuit 2 respectively to convert the voltage of the battery pack into the PD voltage required by the load, so as to realize external DC power supply.

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