A mobile power supply
Patent Information
- Application Number
- CN202522227424.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-10-21
AI Technical Summary
因此，存在移动电源的自带连接线错误连接至移动电源的输入输出端口，从而出现设备损坏或者功能异常无法正常工作等问题
[0014]本实用新型技术方案通过采用一种移动电源，可以确保在移动电源的输入端和输出端自连时，移动电源可自行确认并断开充放电回路，从而提高移动电源使用的安全性。移动电源包括第一接口、第二接口和电源管理电路。其中，第一接口为公头，第二接口为母座，以实现移动电源中第一接口和第二接口的直接互连。电源管理电路则分别与第一接口、第二接口电连接，从而配置第一接口和第二接口的工作状态，例如将第一接口的工作状态配置为充电装置、停止状态或放电状态。通过将第一接口和第二接口中的一者配置为充电状态且另一者配置为放电状态，并将处于放电状态的一者配置为停止状态，且检测另一者的电流，从而通过电流是否会随另一接口状态的变化而变化，进而确认第一接口和第二接口是否互接。
Smart Images
Figure CN224862817U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mobile power bank charging and discharging protection technology, and in particular to a mobile power bank. Background Technology
[0002] Existing technologies include power banks with multiple input / output ports and a built-in cable for fixed connection to one input / output interface, catering to diverse user charging and discharging needs. To facilitate connection during charging and discharging, the port type of the input / output port may correspond to the interface type of the built-in cable. For example, the input / output port may be USB-C, and the built-in cable may also be USB-C. Therefore, there is a possibility that the built-in cable may be incorrectly connected to the power bank's input / output port, leading to device damage or malfunction. Utility Model Content
[0003] The main purpose of this utility model is to provide a portable power bank that aims to improve the safety of portable power bank use.
[0004] To achieve the above objectives, the present invention provides a portable power bank, which includes: The first interface is a male connector, and the second interface is a female connector. A power management circuit is electrically connected to the first interface and the second interface respectively; the power management circuit is used to configure the operating states of the first interface and the second interface; the operating states include charging state, stop state and discharging state; Wherein, when one of the first interface and the second interface is configured to be in a charging state and the other is configured to be in a discharging state, the power management circuit is used to configure the one in the discharging state to a stop state and detect the current of the other.
[0005] In one embodiment, the power management circuit includes: Power control circuit; A first switching circuit, wherein a first terminal of the first switching circuit is electrically connected to the first interface, a controlled terminal of the first switching circuit is electrically connected to the control circuit, and a second terminal of the first switching circuit is electrically connected to the power control circuit; the first switching circuit is used to turn on or off the path between the first interface and the power control circuit. The second switching circuit has a first terminal electrically connected to the second interface, a controlled terminal electrically connected to the control circuit, and a second terminal electrically connected to the power control circuit; the second switching circuit is used to turn on or off the path between the second interface and the power control circuit. The power control circuit is configured to, when one of the first interface and the second interface is configured to be in a charging state and the other is configured to be in a discharging state, configure the one in the discharging state to be in a stop state and detect the current of the other interface.
[0006] In one embodiment, the power management circuit further includes: A first filter circuit, wherein a first terminal of the first filter circuit is electrically connected to the first interface, and a second terminal of the first filter circuit is electrically connected to the first terminal of the first switch circuit. The second filter circuit has its first end electrically connected to the second interface and its second end electrically connected to the first end of the second switch circuit.
[0007] In one embodiment, the power management circuit further includes: A first voltage regulator circuit, wherein a first terminal of the first voltage regulator circuit is electrically connected to a second terminal of the first filter circuit, and a second terminal of the first voltage regulator circuit is electrically connected to a first terminal of the first switching circuit. The second voltage regulator circuit has its first terminal electrically connected to the second terminal of the second filter circuit, and its second terminal electrically connected to the first terminal of the second switching circuit.
[0008] In one embodiment, the power management circuit further includes: The third filter circuit has its first terminal electrically connected to the second terminal of the first voltage regulator circuit, and its second terminal electrically connected to the first terminal of the first switch circuit. The fourth filter circuit has its first terminal electrically connected to the second terminal of the second voltage regulator circuit, and its second terminal electrically connected to the first terminal of the second switching circuit.
[0009] In one embodiment, the first filter circuit includes a first resistor and a first capacitor; the second filter circuit includes a second resistor and a second capacitor; the first voltage regulator circuit includes a first Zener diode; the second voltage regulator circuit includes a second Zener diode; the third filter circuit includes a third resistor and a third capacitor; and the fourth filter circuit includes a fourth resistor and a fourth capacitor. Wherein, the first end of the first resistor is electrically connected to the first end of the first interface; the second end of the first resistor is electrically connected to the first end of the first capacitor, the anode of the first Zener diode, the second end of the third capacitor, and the ground terminal; the first end of the first capacitor is electrically connected to the second end of the first interface and the first end of the third resistor; the second end of the third resistor is electrically connected to the first end of the third capacitor and the first end of the first switching circuit; the second and third ends of the first switching circuit are respectively electrically connected to the power control circuit; the first end of the second resistor is electrically connected to the first end of the second interface; the second end of the second resistor is electrically connected to the first end of the second capacitor, the anode of the second Zener diode, the second end of the fourth capacitor, and the ground terminal; the first end of the second capacitor is electrically connected to the second end of the second interface and the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor and the first end of the second switching circuit; the second and third ends of the second switching circuit are respectively electrically connected to the power control circuit.
[0010] In one embodiment, the power bank includes a housing, a power management circuit is disposed within the housing, and at least one of the first interface and the second interface is electrically connected to the power management circuit via an electrical connection wire and extends out of the housing.
[0011] In one embodiment, the first interface is a USB-C male connector, and the second interface is a USB-C female connector.
[0012] In one embodiment, the first interface is a USB-C male connector and the second interface is a USB-A female connector.
[0013] In one embodiment, the number of the first interface and the second interface is multiple; Wherein, the plurality of first interfaces include at least one input / output interface; and / or, the plurality of second interfaces include at least one input / output interface.
[0014] This utility model's technical solution employs a portable power bank that ensures the power bank can automatically identify and disconnect the charging / discharging circuit when its input and output terminals are self-connected, thereby improving the safety of its use. The portable power bank includes a first interface, a second interface, and a power management circuit. The first interface is a male connector, and the second interface is a female connector, enabling direct interconnection between the first and second interfaces. The power management circuit is electrically connected to both the first and second interfaces to configure their operating states, such as configuring the first interface as a charging device, a stopped state, or a discharging state. By configuring one of the first and second interfaces to a charging state and the other to a discharging state, and setting the discharging interface to a stopped state, and detecting the current of the other interface, the system can determine whether the first and second interfaces are interconnected by observing whether the current changes with the state of the other interface. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the module of the portable power bank of this utility model; Figure 2 This is a schematic diagram of a module of a portable power bank according to an embodiment of the present invention; Figure 3 This is a circuit diagram of an embodiment of the portable power supply of this utility model; Figure 4 This is a circuit diagram of another embodiment of the portable power supply of this utility model.
[0017] Explanation of icon numbers: 10. First interface; 20. Second interface; 30. Power management circuit; 31. Power control circuit; 32. First switching circuit; 33. Second switching circuit; 34. First filter circuit; 35. Second filter circuit; 36. First voltage regulator circuit; 37. Second voltage regulator circuit; 38. Third filter circuit; 39. Fourth filter circuit; R1-R4, first resistor-fourth resistor; C1-C4, first capacitor-fourth capacitor; D1-D2, first Zener diode-second Zener diode.
[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0022] Existing technologies include power banks with multiple input / output ports and a built-in cable for fixed connection to one input / output interface, catering to diverse user charging and discharging needs. To facilitate connection during charging and discharging, the port type of the input / output port may correspond to the interface type of the built-in cable. For example, the input / output port may be USB-C, and the built-in cable may also be USB-C. Therefore, there is a possibility that the built-in cable may be incorrectly connected to the power bank's input / output port, leading to device damage or malfunction.
[0023] To solve the above problems, refer to Figure 1 This utility model proposes a portable power bank, which includes: The first interface 10 is a male connector and the second interface 20 is a female connector. A power management circuit 30 is electrically connected to the first interface 10 and the second interface 20 respectively; the power management circuit 30 is used to configure the working state of the first interface 10 and the second interface 20; the working state includes charging state, stop state and discharging state. When one of the first interface 10 and the second interface 20 is configured to be in a charging state and the other is configured to be in a discharging state, the power management circuit 30 is used to configure the one in the discharging state to be in a stop state and detect the current of the other.
[0024] In this embodiment, both the first interface 10 and the second interface 20 can be implemented using USB-C interfaces, or one can be implemented using a USB-A interface and the other using a USB-C interface. It is understood that when both the first interface 10 and the second interface 20 are implemented using USB-C interfaces, the power management circuit 30 can determine the power requirements of the connected device based on the CC pin of the USB-C interface, thereby achieving charge / discharge control. For example, the power management circuit 30 can determine through the CC pin on the USB-C interface that the device connected to the first interface 10 is a power-consuming device and the device connected to the second interface 20 is a power supply, thereby achieving power supply to the power-consuming device and charging of itself. When the first interface 10 is implemented using a USB-C interface and the second interface 20 is implemented using a USB-A interface, the power management circuit 30 can determine the power requirements of the connected device through the DM pin and DP pin, thereby achieving charge / discharge control. For example, the power management circuit 30 can confirm that the device connected to the first interface 10 is a power supply through the CC pin on the USB-C interface, and confirm that the device connected to the second interface 20 is a power user through the DM and DP pins on the USB-A interface, thereby confirming the power demand of the connected devices and realizing charge / discharge control. Furthermore, the first interface 10 is a male connector, and the second interface 20 is a female connector, and the first interface 10 can be connected to the second interface 20 via its own cable. Specifically, when the first interface 10 is a USB-C male connector and the second interface 20 is a USB-C female connector, they can be directly connected; when the first interface 10 is a USB-C male connector and the second interface 20 is a USB-A female connector, they can be connected via an adapter cable.
[0025] Optionally, the power bank includes a housing, within which a power management circuit is disposed. At least one of the first interface and the second interface is electrically connected to the power management circuit via an electrical connection cable and extends out of the housing. The electrical connection cable is the self-contained cable described above.
[0026] In this embodiment, the power management circuit 30 can be implemented using a corresponding power control circuit 31, a switching circuit, a current detection circuit, a logic control circuit, etc. The power management circuit 30 is electrically connected to both the first interface 10 and the second interface 20 to confirm their connection status and control their operating states. For example, when a device is connected to the first interface 10, the power management circuit 30 can confirm the device is a power user through the communication terminal on the first interface 10, converting the power from the power bank to the corresponding voltage and outputting it to the device via the first interface 10 to charge it. When an external power source is connected to the second interface 20, the power management circuit 30 can confirm the device is a power supply device through the communication terminal on the second interface 20, inputting the external power to the power management circuit 30 via the second interface 20 and converting it to the corresponding voltage to charge the power bank. It is understood that both the first interface 10 and the second interface 20 are connected, with one configured for charging and the other for discharging. At this point, there might be a problem where the first interface 10 and the second interface 20 of the power bank are interconnected. Therefore, the power management circuit 30 configures the interface in the discharging state to a stop state, i.e., a stopped discharging state, and detects whether there is current on the other interface to confirm whether the first interface 10 and the second interface 20 are interconnected. If the current on the other interface disappears when the interface in the discharging state is configured to a stop state, it can be confirmed that the first interface 10 and the second interface 20 are interconnected; if the current on the other interface does not change when the interface in the discharging state is configured to a stop state, it can be confirmed that the first interface 10 and the second interface are not interconnected.
[0027] This invention employs a portable power bank that ensures the power bank can automatically identify and disconnect the charging / discharging circuit when its input and output terminals are self-connected, thereby improving the safety of its use. The portable power bank includes a first interface 10, a second interface 20, and a power management circuit 30. The first interface 10 is a male connector, and the second interface 20 is a female connector, enabling direct interconnection between the two interfaces. The power management circuit 30 is electrically connected to both the first interface 10 and the second interface 20, configuring their operating states. For example, the first interface 10 can be configured as a charging device, a stopped state, or a discharging state. By configuring one of the first interface 10 and the second interface 20 as charging and the other as discharging, and setting the discharging interface to a stopped state, and detecting the current of the other interface, the connection between the first interface 10 and the second interface 20 can be confirmed by observing whether the current changes with the state of the other interface.
[0028] refer to Figures 2 to 4 In one embodiment of this utility model, the power management circuit 30 includes: Power control circuit 31; A first switching circuit 32 has a first terminal electrically connected to the first interface 10, a controlled terminal electrically connected to the control circuit, and a second terminal electrically connected to the power control circuit 31. The first switching circuit 32 is used to turn on or off the path between the first interface 10 and the power control circuit 31. The second switching circuit 33 has a first terminal electrically connected to the second interface 20, a controlled terminal electrically connected to the control circuit, and a second terminal electrically connected to the power control circuit 31; the second switching circuit 33 is used to turn on or off the path between the second interface 20 and the power control circuit 31. The power control circuit 31 is configured to, when one of the first interface 10 and the second interface 20 is configured to be in a charging state and the other is configured to be in a discharging state, configure the one in the discharging state to be in a stop state and detect the current of the other.
[0029] In this embodiment, the power control circuit 31 can be implemented using a corresponding charge / discharge management chip and corresponding external circuitry, specifically using an IP5385 chip and corresponding peripheral circuitry. The power control circuit 31 is connected to the communication terminals of the first interface 10 and the second interface 20 to confirm the connection status of the first interface 10 and the second interface 20, as well as the required operating mode of the devices connected to the first interface 10 and the second interface 20. For example, when the first interface 10 and the second interface 20 are USB-C interfaces, the power control circuit 31 is electrically connected to the CC interface of the USB-C interface; when the first interface 10 and the second interface 20 are USB-A interfaces, the power control circuit 31 is electrically connected to the DM and DP interfaces of the USB-A interface.
[0030] In this embodiment, the first switching circuit 32 and the second switching circuit 33 can be implemented using at least one switching transistor, such as a MOSFET, IGBT, thyristor, transistor, or power transistor, and / or using at least one switching device, such as a contactor, circuit breaker, or relay. The controlled terminals of both the first switching circuit 32 and the second switching circuit 33 are electrically connected to the power control circuit 31. This allows the power control circuit 31 to control the corresponding switching circuit to configure the discharging interface to a stopped state and detect the current of the other interface when one of the first interface 10 and the second interface 20 is configured to charge and the other to discharge.
[0031] Optionally, there may be multiple first interfaces 10 and multiple second interfaces 20; wherein each of the multiple first interfaces 10 includes at least one input / output interface; and / or each of the multiple second interfaces 20 includes at least one input / output interface. Therefore, each first interface 10 corresponds to a first switch circuit 32, and each second interface 20 corresponds to a second switch circuit 33, thereby enabling the control of the interface's operating state by controlling either the first switch circuit 32 or the second switch circuit 33 when any interface is an input / output interface.
[0032] Optionally, the power management circuit 30 further includes: A first filter circuit 34, the first end of the first filter circuit 34 is electrically connected to the first interface 10, and the second end of the first filter circuit 34 is electrically connected to the first end of the first switch circuit 32. The second filter circuit 35 has its first end electrically connected to the second interface 20, and its second end electrically connected to the first end of the second switch circuit 33.
[0033] It is understandable that when the first interface 10 is an input interface, the first filter circuit 34 is an input filter circuit; when the first interface 10 is an output interface, the first filter circuit 34 is an output filter circuit. Specifically, when the first filter circuit 34 acts as an input filter circuit, it protects the internal circuitry of the power bank from external power noise (such as surges, spikes, and high-frequency interference), and prevents noise generated internally by the power bank from being reverse-conducted to the external power source, affecting other devices. When the first filter circuit 34 acts as an output filter circuit, it provides a clean, stable, and low-noise voltage or current to the load, ensuring the normal operation of the load (such as sensitive analog circuits, microprocessors, sensors, etc.). The function of the second filter circuit 35 is similarly understood.
[0034] Optionally, the power management circuit 30 further includes: A first voltage regulator circuit 36, the first terminal of the first voltage regulator circuit 36 is electrically connected to the second terminal of the first filter circuit 34, and the second terminal of the first voltage regulator circuit 36 is electrically connected to the first terminal of the first switch circuit 32. The second voltage regulator circuit 37 has its first terminal electrically connected to the second terminal of the second filter circuit 35, and its second terminal electrically connected to the first terminal of the second switch circuit 33.
[0035] In this embodiment, the first voltage regulator circuit 36 and the second voltage regulator circuit 37 function identically, differing only in their interface. Specifically, when the first interface 10 is configured for charging, the voltage regulator circuit ensures that the charging voltage does not exceed the maximum safe charging voltage of the power bank. When the first interface 10 is configured for discharging, the voltage regulator circuit provides a constant voltage to the load, even as the battery voltage decreases with power consumption.
[0036] Optionally, the power management circuit 30 further includes: The third filter circuit 38, the first end of which is electrically connected to the second end of the first voltage regulator circuit 36, and the second end of which is electrically connected to the first end of the first switch circuit 32; The fourth filter circuit 39 has its first terminal electrically connected to the second terminal of the second voltage regulator circuit 37, and its second terminal electrically connected to the first terminal of the second switch circuit 33.
[0037] It is understandable that both the first interface 10 and the second interface 20 can be configured as input / output interfaces. Therefore, the operating states of the first interface 10 and the second interface 20 may differ at different times; they may be in a discharging state or an output state. Consequently, the corresponding filtering circuits for the input / output interfaces need to include both input and output filtering circuits. Specifically, the third filtering circuit 38 and the first filtering circuit 34 belong to the same interface's input / output filtering circuits; the fourth filtering circuit 39 and the second filtering circuit 35 also belong to the same interface's input / output filtering circuits.
[0038] Optionally, the first filter circuit 34 includes a first resistor R1 and a first capacitor C1; the second filter circuit 35 includes a second resistor R2 and a second capacitor C2; the first voltage regulator circuit 36 includes a first Zener diode D1; the second voltage regulator circuit 37 includes a second Zener diode D2; the third filter circuit 38 includes a third resistor R3 and a third capacitor C3; and the fourth filter circuit 39 includes a fourth resistor R4 and a fourth capacitor C4. Wherein, the first end of the first resistor R1 is electrically connected to the first end of the first interface 10; the second end of the first resistor R1 is electrically connected to the first end of the first capacitor C1, the anode of the first Zener diode D1, the second end of the third capacitor C3, and the ground terminal; the first end of the first capacitor C1 is electrically connected to the second end of the first interface 10 and the first end of the third resistor R3; the second end of the third resistor R3 is electrically connected to the first end of the third capacitor C3 and the first end of the first switching circuit 32; the second and third ends of the first switching circuit 32 are respectively electrically connected to the power control circuit 31. The first end of the second resistor R2 is electrically connected to the first end of the second interface 20; the second end of the second resistor R2 is electrically connected to the first end of the second capacitor C2, the anode of the second Zener diode D2, the second end of the fourth capacitor C4, and the ground terminal; the first end of the second capacitor C2 is electrically connected to the second end of the second interface 20 and the first end of the fourth resistor R4; the second end of the fourth resistor R4 is electrically connected to the first end of the fourth capacitor C4 and the first end of the second switching circuit 33; the second and third ends of the second switching circuit 33 are respectively electrically connected to the power control circuit 31.
[0039] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A portable power bank, characterized in that, The portable power bank includes: The first interface is a male connector, and the second interface is a female connector. A power management circuit is electrically connected to the first interface and the second interface respectively; the power management circuit is used to configure the operating states of the first interface and the second interface; the operating states include charging state, stop state and discharging state; Wherein, when one of the first interface and the second interface is configured to be in a charging state and the other is configured to be in a discharging state, the power management circuit is used to configure the one in the discharging state to a stop state and detect the current of the other.
2. The portable power bank as described in claim 1, characterized in that, The power management circuit includes: Power control circuit; A first switching circuit, wherein a first terminal of the first switching circuit is electrically connected to the first interface, a controlled terminal of the first switching circuit is electrically connected to the control circuit, and a second terminal of the first switching circuit is electrically connected to the power control circuit; the first switching circuit is used to turn on or off the path between the first interface and the power control circuit. The second switching circuit has a first terminal electrically connected to the second interface, a controlled terminal electrically connected to the control circuit, and a second terminal electrically connected to the power control circuit; the second switching circuit is used to turn on or off the path between the second interface and the power control circuit. The power control circuit is configured to, when one of the first interface and the second interface is configured to be in a charging state and the other is configured to be in a discharging state, configure the one in the discharging state to be in a stop state and detect the current of the other interface.
3. The portable power bank as described in claim 2, characterized in that, The power management circuit also includes: A first filter circuit, wherein a first terminal of the first filter circuit is electrically connected to the first interface, and a second terminal of the first filter circuit is electrically connected to the first terminal of the first switch circuit. The second filter circuit has its first end electrically connected to the second interface and its second end electrically connected to the first end of the second switch circuit.
4. The portable power bank as described in claim 3, characterized in that, The power management circuit also includes: A first voltage regulator circuit, wherein a first terminal of the first voltage regulator circuit is electrically connected to a second terminal of the first filter circuit, and a second terminal of the first voltage regulator circuit is electrically connected to a first terminal of the first switching circuit. The second voltage regulator circuit has its first terminal electrically connected to the second terminal of the second filter circuit, and its second terminal electrically connected to the first terminal of the second switching circuit.
5. The portable power bank as described in claim 4, characterized in that, The power management circuit also includes: The third filter circuit has its first terminal electrically connected to the second terminal of the first voltage regulator circuit, and its second terminal electrically connected to the first terminal of the first switch circuit. The fourth filter circuit has its first terminal electrically connected to the second terminal of the second voltage regulator circuit, and its second terminal electrically connected to the first terminal of the second switching circuit.
6. The portable power bank as described in claim 5, characterized in that, The first filter circuit includes a first resistor and a first capacitor; the second filter circuit includes a second resistor and a second capacitor; the first voltage regulator circuit includes a first Zener diode; the second voltage regulator circuit includes a second Zener diode; the third filter circuit includes a third resistor and a third capacitor; the fourth filter circuit includes a fourth resistor and a fourth capacitor. Wherein, the first end of the first resistor is electrically connected to the first end of the first interface; the second end of the first resistor is electrically connected to the first end of the first capacitor, the anode of the first Zener diode, the second end of the third capacitor, and the ground terminal; the first end of the first capacitor is electrically connected to the second end of the first interface and the first end of the third resistor; the second end of the third resistor is electrically connected to the first end of the third capacitor and the first end of the first switching circuit; the second and third ends of the first switching circuit are respectively electrically connected to the power control circuit; the first end of the second resistor is electrically connected to the first end of the second interface; the second end of the second resistor is electrically connected to the first end of the second capacitor, the anode of the second Zener diode, the second end of the fourth capacitor, and the ground terminal; the first end of the second capacitor is electrically connected to the second end of the second interface and the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor and the first end of the second switching circuit; the second and third ends of the second switching circuit are respectively electrically connected to the power control circuit.
7. The portable power bank as described in claim 1, characterized in that, The power bank includes a housing, and a power management circuit is disposed inside the housing. At least one of the first interface and the second interface is electrically connected to the power management circuit via an electrical connection wire and extends out of the housing.
8. The portable power bank as described in claim 1, characterized in that, The first interface is a USB-C male connector, and the second interface is a USB-C female connector.
9. The portable power bank as described in claim 1, characterized in that, The first interface is a USB-C male connector, and the second interface is a USB-A female connector.
10. The portable power bank according to any one of claims 1 to 9, characterized in that, There are multiple first interfaces and second interfaces; Wherein, the plurality of first interfaces include at least one input / output interface; and / or, the plurality of second interfaces include at least one input / output interface.