Power supply control circuit supporting AC / DC input and shared power bank cabinet

Abstract

The utility model relates to a power supply control circuit supporting AC / DC input and a shared power bank cabinet, comprising an AC input interface, a DC input interface, an anti-reverse connection circuit, a decoy circuit and a DC / DC conversion circuit, the DC input interface comprises a power supply port and a fast charge protocol port; the alternating current input interface is electrically connected with a cabinet main board supporting alternating current and direct current input and used for being connected with an alternating current power supply. A power supply port of the direct current input interface is connected with the reverse connection prevention circuit, and a fast charging protocol port is connected with the decoy circuit and used for being connected with a direct current power supply; the output end of the reverse connection prevention circuit is connected with the decoy circuit and the DC / DC conversion circuit. According to the cabinet machine, alternating current is accessed through the alternating current input interface, direct current is accessed through the direct current input interface, a direct current power supply with a fast charging protocol can be supported by arranging the decoy circuit, and the problem that a traditional cabinet machine is single in power supply input type is solved.

Description

Technical Field

[0001] This application relates to the field of charging management technology, and in particular to power control circuits that support AC and DC inputs and shared power bank cabinets. Background Technology

[0002] With the widespread adoption of mobile devices and the rapid development of the sharing economy, AC / DC input support has gradually become a standard feature in public places such as shopping malls, restaurants, and airports as a convenient charging solution. However, traditional AC / DC input support systems have significant limitations in power input design, especially in terms of power input flexibility and emergency power supply capabilities.

[0003] Traditional charging stations that support both AC and DC input typically only support AC power input, relying on mains power. While this design may meet the station's operational needs under normal circumstances, a power outage will immediately shut it down, preventing users from renting or returning shared power banks. This is particularly common in areas with unstable power supplies or during sudden power outages, severely impacting user experience and potentially leading to complaints and a crisis of trust. Furthermore, traditional charging stations lack flexibility in their power input design, usually supporting only AC power input and incompatible with other types of power input, such as DC power supplies supporting fast charging protocols. This design limits the station's applicability, especially in special environments (such as outdoor activities or temporary locations) where other power sources (such as power banks or solar panels) cannot be used to power the station. Utility Model Content

[0004] This application provides a power control circuit that supports both AC and DC inputs and a shared charging station cabinet, which at least solves the problem in the related technology that traditional cabinets lack flexibility in power input design and only support a single AC power input.

[0005] In a first aspect, embodiments of this application provide a power control circuit supporting AC / DC input, applied in a shared charging station cabinet, comprising:

[0006] AC input interface, used for connecting to AC power supply;

[0007] An AC / DC conversion circuit is connected between the AC power input interface and the main board of the shared charging station, and is used to convert the AC voltage output by the AC power supply into a voltage suitable for the main board of the station.

[0008] DC input interface for connecting to a DC power supply;

[0009] A reverse connection protection circuit is connected between the DC input interface and the DC / DC conversion circuit to disconnect when a reverse voltage occurs in the circuit.

[0010] A DC / DC conversion circuit is connected between the DC power input interface and the main board of the shared charging station, and is used to convert the output voltage of the DC power supply into a voltage suitable for the main board of the station.

[0011] In one embodiment, the power control circuit further includes a decoy circuit, and the DC input interface includes a power port and a fast charging protocol port; wherein,

[0012] The power input terminal of the deception circuit is connected to the power port through the reverse connection protection circuit, and the communication input terminal of the deception circuit is connected to the DC power input interface fast charging protocol port.

[0013] When the DC power supply does not support the fast charging protocol, the decoy circuit is in a non-operating state, and the DC power supply outputs a first power voltage; when the DC power supply supports the fast charging protocol, the decoy circuit is in an operating state and decoys the DC power supply to output a second power voltage; wherein, the first power voltage is less than the second power voltage.

[0014] In one embodiment, the reverse connection protection circuit includes an electronic switch, a first resistor, a second resistor, a first capacitor, and a second capacitor; wherein,

[0015] The first end of the electronic switch is connected to the power port, and the second end is connected to the DC / DC conversion circuit. The control terminal of the electronic switch is connected to the power port and the common ground through the first resistor and the second resistor, respectively. The first capacitor is connected between the second end of the electronic switch and the common ground, and the second capacitor is connected in parallel with the first resistor.

[0016] In one embodiment, the electronic switch is a PMOS transistor, wherein the gate, source, and drain of the PMOS transistor are respectively referred to as the control terminal, the first terminal, and the second terminal of the electronic switch.

[0017] In one embodiment, the fast charging protocol port includes a CC1 signal terminal, a CC2 signal terminal, a DP signal terminal, and a DM signal terminal, and the decoy circuit includes a decoy chip, a third resistor, and a fourth resistor; wherein,

[0018] The CC1 signal terminal is connected to the CC1 pin of the decoy chip through the third resistor, the CC2 signal terminal is connected to the CC2 pin of the decoy chip through the fourth resistor, the DP signal terminal is connected to the DP pin of the decoy chip, the DM signal terminal is connected to the DM pin of the decoy chip, and the power input pin of the decoy chip is connected to the output terminal of the reverse connection protection circuit.

[0019] In one embodiment, the deception circuit further includes a first Zener diode and a second Zener diode; wherein,

[0020] The anode of the first Zener diode is grounded, and the cathode is connected to the CC1 pin of the decoy chip; the anode of the second Zener diode is grounded, and the cathode is connected to the CC2 pin of the decoy chip.

[0021] In one embodiment, the decoy circuit further includes a filter circuit connected between the output of the reverse connection protection circuit and the power input pin of the decoy chip.

[0022] In one embodiment, the DC / DC conversion circuit includes:

[0023] A DC / DC step-down converter is used to convert the voltage output by the reverse connection protection circuit to a voltage suitable for the power bank cabinet.

[0024] An anti-backflow circuit is connected between the output terminal of the DC / DC step-down converter and the main board of the cabinet to prevent current backflow.

[0025] In one embodiment, the anti-backflow circuit includes N anti-backflow diodes connected in parallel, where N is a positive integer; the anode of the anti-backflow diode is connected to the output terminal of the DC / DC buck converter, and the cathode is connected to the cabinet motherboard.

[0026] Secondly, this application provides a shared power bank cabinet, characterized in that it includes a power control circuit supporting AC / DC input as described in any of the above embodiments.

[0027] The power control circuit and shared charging station that support AC / DC input provided in this application embodiment have at least the following technical effects:

[0028] This utility model proposes a power control circuit and a shared charging station cabinet, including an AC input interface, a DC input interface, a reverse connection protection circuit, a deception circuit, and a DC / DC conversion circuit. AC power is connected through the AC input interface, and DC power is connected through the DC input interface. In summary, this application enables the cabinet to automatically switch to a backup DC power source when the mains power fails, ensuring continuous operation and avoiding disruption to users renting or returning charging stations.

[0029] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 This is a structural block diagram of a power control circuit supporting AC / DC input in one embodiment of this application;

[0032] Figure 2 This is a structural block diagram of a power control circuit supporting AC / DC input in another embodiment of this application;

[0033] Figure 3 This is a circuit diagram of the DC input interface and reverse connection protection circuit in one embodiment of this application;

[0034] Figure 4 This is a circuit diagram of the decoy circuit in one embodiment of this application;

[0035] Figure 5 This is a circuit schematic diagram of a DC / DC conversion circuit in one embodiment of this application. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0037] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0038] In this application, the reference to "embodiment" means that a specific 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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0039] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0040] In a first aspect, embodiments of this application provide a power control circuit (hereinafter referred to as the power control circuit) that supports AC / DC input, which is applied in shared power bank cabinets. Figure 1 This is a block diagram of the power supply control circuit.

[0041] Specifically, such as Figure 1 As shown, the power control circuit supporting AC / DC input in this embodiment includes an AC input interface, a DC input interface, a reverse connection protection circuit, an AC / DC conversion circuit, and a DC / DC conversion circuit.

[0042] In this embodiment, the AC input interface is electrically connected to the main board of the shared charging station and is used to connect to AC power. The AC / DC conversion circuit is connected between the AC input interface and the main board of the shared charging station and is used to convert the AC voltage output by the AC power supply into a voltage suitable for the main board of the station. The DC input interface is used to connect to DC power. The reverse connection protection circuit is connected between the DC input interface and the DC / DC conversion circuit and is used to disconnect when a reverse voltage occurs in the circuit. The DC / DC conversion circuit is connected between the DC input interface and the main board of the shared charging station and is used to convert the voltage output by the DC power supply into a voltage suitable for the main board of the station.

[0043] In practical applications, the power control circuit of this embodiment is installed in the shared charging station cabinet. When the mains power is working normally, the mains power input via the AC / DC conversion circuit is converted into a suitable DC power supply and then supplies power to the cabinet. When the mains power fails, a DC power supply can be connected via the DC input interface to supply power to the cabinet's mainboard, ensuring the shared charging station cabinet can operate normally without affecting users' rental and return. In summary, this application enables the cabinet to automatically switch to a backup DC power supply when the mains power fails, ensuring continuous operation of the cabinet and solving the problem of shared charging stations.

[0044] In another embodiment, reference Figure 2 The power control circuit in this embodiment further includes a decoy circuit. The DC input interface includes a power port and a fast charging protocol port. The power input terminal of the decoy circuit is connected to the power port via the reverse connection protection circuit, and the communication input terminal of the decoy circuit is connected to the fast charging protocol port of the DC input interface. When the DC power supply does not support the fast charging protocol, the decoy circuit is inactive, and the DC power supply outputs a first power voltage. When the DC power supply supports the fast charging protocol, the decoy circuit is active and decoys the DC power supply to output a second power voltage; wherein the first power voltage is less than the second power voltage.

[0045] Specifically, when the AC input interface is connected to an AC power source, the AC power source supplies power to the cabinet's mainboard. When the DC input interface is connected to a first DC power source without a fast charging protocol, the first DC power source directly supplies power to the cabinet's mainboard through the DC / DC conversion circuit. In this case, the decoy circuit does not operate, so the low-power voltage output by the first DC power source is directly input to the DC / DC conversion circuit after passing through the DC input interface, and is converted into a voltage suitable for the cabinet. When the DC input interface is connected to a second DC power source with a fast charging protocol, the decoy circuit induces the second DC power source to output a high-power voltage to the DC / DC conversion circuit. The second DC power source will output according to the highest fast charging voltage it supports, and then the DC / DC conversion circuit will convert it into a voltage suitable for the cabinet.

[0046] This embodiment proposes a power control circuit and a shared charging station cabinet. It connects to AC power via an AC input interface and to DC power via a DC input interface. A decoy circuit is incorporated to support DC power supplies with fast charging protocols. In summary, this embodiment enables the cabinet to automatically switch to backup power or DC power input during a mains power outage, ensuring continuous operation and preventing disruption to users renting or returning charging stations. It also ensures the cabinet continues to operate normally even during power outages.

[0047] In a preferred embodiment, reference Figure 3 The DC input interface P7 includes a power supply terminal (pin 1), a ground terminal (pins 6 and 7), a CC1 signal terminal (pin 2), a CC2 signal terminal (pin 3), a DP signal terminal (pin 4), and a DM signal terminal (pin 5). The CC1 signal terminal, CC2 signal terminal, DP signal terminal, and DM signal terminal are referred to as the fast charging protocol port.

[0048] The reverse connection protection circuit includes an electronic switch Q1, a first resistor R1, a second resistor R2, a first capacitor C1, and a first capacitor C2. The first terminal of the electronic switch Q1 is connected to the power supply port, and the second terminal is connected to the DC / DC conversion circuit. The control terminal of the electronic switch Q1 is connected to the power supply port and the common ground GND through the first resistor R1 and the second resistor R2, respectively. The first capacitor C1 is connected between the second terminal of the electronic switch Q1 and the common ground GND. The first capacitor C2 is connected in parallel with the first resistor R1. In this embodiment, the common connection point of the electronic switch Q1 and the first capacitor C1 is used as the output terminal VBUS of the reverse connection protection circuit.

[0049] In this embodiment, the electronic switch Q1 can be a thyristor, transistor, field-effect transistor, silicon controlled rectifier, relay, etc. Taking the electronic switch Q1 as a PMOS transistor as an example, the gate, source, and drain of the PMOS transistor are respectively referred to as the control terminal, the first terminal, and the second terminal of the electronic switch.

[0050] refer to Figure 4 The decoy circuit includes a decoy chip U1, a third resistor R3, and a fourth resistor R4. In this embodiment, the CC1 signal terminal is connected to the CC1 pin of the decoy chip U1 through the third resistor R3, the CC2 signal terminal is connected to the CC2 pin of the decoy chip U1 through the fourth resistor R4, the DP signal terminal is connected to the DP pin of the decoy chip U1, the DM signal terminal is connected to the DM pin of the decoy chip U1, and the power input pin VDD of the decoy chip U1 is connected to the output terminal VBUS of the reverse connection protection circuit.

[0051] In a preferred embodiment, the decoy circuit U1 further includes a first Zener diode ZD1 and a second Zener diode ZD2, wherein the anode of the first Zener diode ZD1 is grounded and the cathode is connected to the CC1 pin of the decoy chip U1; the anode of the second Zener diode ZD2 is grounded and the cathode is connected to the CC2 pin of the decoy chip U1.

[0052] refer to Figure 4The decoy circuit U1 in this embodiment also includes a filter circuit, wherein the filter circuit is connected between the output terminal VBUS of the reverse connection protection circuit and the power input pin of the decoy chip U1. In this embodiment, the filter circuit includes a filter resistor R12 and a third capacitor C3.

[0053] refer to Figure 5 The DC / DC conversion circuit includes a DC / DC step-down converter (DC / DC step-down conversion chip) U2, an anti-backflow circuit, and peripheral circuits. The DC / DC step-down converter is used to convert the voltage output by the anti-reverse connection circuit to a voltage suitable for the power bank cabinet. The anti-backflow circuit is connected between the output terminal of the DC / DC step-down converter and the main board of the cabinet to prevent current backflow.

[0054] Preferably, the anti-backflow circuit includes N anti-backflow diodes connected in parallel, where N is a positive integer; the anode of the anti-backflow diode is connected to the output terminal of the DC / DC buck converter, and the cathode is connected to the mainboard of the cabinet. Figure 5 The backflow prevention circuit in this embodiment includes three backflow prevention diodes (D1, D2, D3).

[0055] In summary, the power control circuit supporting both AC and DC inputs provided in this application, by introducing a fast-charging protocol decoy chip, enables the charging station to identify and trigger power inputs supporting fast-charging protocols, fully utilizing high-power output capabilities and improving charging efficiency. Furthermore, it can be flexibly applied to various scenarios; the design supporting multiple power inputs allows the charging station to adapt to more application scenarios, such as outdoor activities and temporary locations, improving the flexibility and coverage of the charging station. It can automatically switch to backup power or DC power input when the mains power fails, ensuring the charging station can still operate normally in the event of a power outage. Simultaneously, this utility model also introduces a fast-charging protocol decoy chip, which is compatible with power inputs supporting fast-charging protocols, triggering high-power fast-charging modes, thereby improving charging efficiency and enhancing the user experience.

[0056] Secondly, this application provides a shared power bank cabinet. In this embodiment, the AC / DC input support includes the power control circuit for AC / DC input described in any of the above embodiments. It should be noted that the implementation process for AC / DC input support provided in this embodiment is the same as the above-described power control circuit implementation method, and will not be repeated hereafter.

[0057] It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A power supply control circuit supporting AC / DC input, characterized in that, Applications in shared power bank cabinets include: AC input interface, used for connecting to AC power supply; An AC / DC conversion circuit is connected between the AC power input interface and the main board of the shared charging station, and is used to convert the AC voltage output by the AC power supply into a voltage suitable for the main board of the station. DC input interface for connecting to a DC power supply; A reverse connection protection circuit is connected between the DC input interface and the DC / DC conversion circuit to disconnect when a reverse voltage occurs in the circuit. A DC / DC conversion circuit is connected between the DC power input interface and the main board of the shared charging station, and is used to convert the output voltage of the DC power supply into a voltage suitable for the main board of the station.

2. The power control circuit according to claim 1, characterized in that, The power control circuit also includes a decoy circuit, and the DC input interface includes a power port and a fast charging protocol port; wherein... The power input terminal of the decoy circuit is connected to the power port through the reverse connection protection circuit, and the communication input terminal of the decoy circuit is connected to the DC power input interface fast charging protocol port. When the DC power supply does not support the fast charging protocol, the decoy circuit is in a non-operating state, and the DC power supply outputs a first power voltage; when the DC power supply supports the fast charging protocol, the decoy circuit is in an operating state and decoys the DC power supply to output a second power voltage; wherein, the first power voltage is less than the second power voltage.

3. The power control circuit according to claim 2, characterized in that, The reverse connection protection circuit includes an electronic switch, a first resistor, a second resistor, a first capacitor, and a second capacitor; wherein, The first end of the electronic switch is connected to the power port, and the second end is connected to the DC / DC conversion circuit. The control terminal of the electronic switch is connected to the power port and the common ground through the first resistor and the second resistor, respectively. The first capacitor is connected between the second end of the electronic switch and the common ground, and the second capacitor is connected in parallel with the first resistor.

4. The power control circuit according to claim 3, characterized in that, The electronic switch is a PMOS transistor, wherein the gate, source, and drain of the PMOS transistor are respectively referred to as the control terminal, the first terminal, and the second terminal of the electronic switch.

5. The power control circuit according to claim 2, characterized in that, The fast charging protocol port includes a CC1 signal terminal, a CC2 signal terminal, a DP signal terminal, and a DM signal terminal; the decoy circuit includes a decoy chip, a third resistor, and a fourth resistor; wherein, The CC1 signal terminal is connected to the CC1 pin of the decoy chip through the third resistor, the CC2 signal terminal is connected to the CC2 pin of the decoy chip through the fourth resistor, the DP signal terminal is connected to the DP pin of the decoy chip, the DM signal terminal is connected to the DM pin of the decoy chip, and the power input pin of the decoy chip is connected to the output terminal of the reverse connection protection circuit.

6. The power control circuit according to claim 5, characterized in that, The deception circuit also includes a first Zener diode and a second Zener diode; wherein... The anode of the first Zener diode is grounded, and the cathode is connected to the CC1 pin of the decoy chip; the anode of the second Zener diode is grounded, and the cathode is connected to the CC2 pin of the decoy chip.

7. The power control circuit according to claim 5, characterized in that, The decoy circuit also includes a filter circuit, which is connected between the output terminal of the reverse connection protection circuit and the power input pin of the decoy chip.

8. The power control circuit according to claim 1, characterized in that, The DC / DC conversion circuit includes: A DC / DC step-down converter is used to convert the voltage output by the reverse connection protection circuit to a voltage suitable for the power bank cabinet. An anti-backflow circuit is connected between the output terminal of the DC / DC step-down converter and the main board of the cabinet to prevent current backflow.

9. The power control circuit according to claim 8, characterized in that, The backflow prevention circuit includes N backflow prevention diodes connected in parallel, where N is a positive integer; the anode of the backflow prevention diode is connected to the output terminal of the DC / DC buck converter, and the cathode is connected to the mainboard of the cabinet.

10. A shared power bank cabinet, characterized in that, Includes the power control circuit supporting AC / DC input as described in any one of claims 1-9.

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