Control circuit for preventing shared power bank from reversely supplying power to cabinet
By designing a control circuit that prevents the shared power bank from being reversely powered to the cabinet, the problem of the shared charging cabinet being reversely powered after the external power supply is interrupted, and the cabinet indicator light and QR code light are not on when the power is disconnected, reminding customers of abnormal working conditions, reducing power consumption and facilitating maintenance.
Patent Information
- Application Number
- CN202421569406.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-04
AI Technical Summary
After the external power supply of the existing shared charging cabinet is interrupted, the shared power bank will supply power to the cabinet in reverse, causing the cabinet indicator light and QR code light to light up, misleading customers to believe that the cabinet is in a normal working state, but in fact, it cannot borrow and return the power bank normally, affecting the customer's experience and power consumption.
Design a control circuit for anti-sharing power bank to supply reverse power to the cabinet, including resistor R1, resistor R2, electrolytic capacitor C1, capacitor C2 and voltage detection chip. By monitoring voltage changes, when the external power supply is disconnected, the power supply of the shared charging cabinet control board is disconnected, so that the indicator light and QR code light are not on, reminding customers that the cabinet is in an abnormal working state.
It effectively avoids the reverse power supply of shared power banks to the shared charging cabinet, ensures that the cabinet indicator light and QR code light do not light when the external power is disconnected, remind customers that the cabinet is in an abnormal working state, reduces power consumption, and facilitates maintenance personnel to detect and repair in a timely manner.
Smart Images
Figure CN222827011U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a control circuit that prevents a shared power bank from supplying reverse power to a cabinet. Background Art
[0002] With the popularity and enhanced functionality of smart terminal products such as smartphones, their usage frequency has increased, leading to an increase in the power demand of smartphones. However, the battery life of smart terminal products such as smartphones has not been significantly improved. To address the power demand of smart terminal products, power banks are widely used in mobile phones, tablets, and related electronic products. However, sometimes people forget to bring their power banks or run out of the ones they carry. To meet customer needs, shared power banks have emerged, which customers can rent for a fee. Shared power banks are generally installed in shared charging cabinets. Under normal circumstances, the indicator lights on the shared charging cabinets are all on, indicating that the shared charging cabinets are in normal working order, and shared power banks can be borrowed and returned normally, and charged normally. However, existing shared charging cabinets have a problem: when the external power supply is interrupted, the shared power banks will reverse power to the shared charging cabinets. At this time, the indicator lights and QR code lights on the shared charging cabinets may light normally, giving customers the illusion that the shared charging cabinets are in normal working order. However, in reality, the shared charging cabinets are no longer able to borrow and return shared power banks normally. This creates a poor customer experience and also consumes the power of the shared power banks. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the utility model aims to provide a control circuit that prevents shared power banks from reversely supplying power to the cabinet. The control circuit is simple, has strong anti-interference ability and is low in cost.
[0004] The utility model is achieved through the following solutions:
[0005] A control circuit for preventing a shared power bank from reversely supplying power to a cabinet includes a resistor R1, a resistor R2, an electrolytic capacitor C1, a capacitor C2, and a voltage detection chip. The power supply terminal of the voltage detection chip, the positive terminal of the electrolytic capacitor C1, and the positive terminal of the capacitor C2 are respectively connected to one end of the resistor R1. The other end of the resistor R1 is connected to the power input terminal of the shared charging cabinet control board. The ground terminal of the voltage detection chip, the negative terminal of the electrolytic capacitor C1, and the negative terminal of the capacitor C2 are respectively grounded. The reset terminal of the voltage detection chip is connected to the power enable terminal of the control unit in the shared charging cabinet control board. The resistor R2 is connected in series between the power input terminal of the shared charging cabinet control board and the power enable terminal of the control unit in the shared charging cabinet control board. Resistor R2 is a pull-up resistor. When the external power supply is operating normally, resistor R2 ensures that the power enable terminal of the control unit in the shared charging cabinet control board is in a high-level state.
[0006] Furthermore, the resistance value of the resistor R1 is 1-10Ω, and the power of the resistor R1 is 1 / 4W; the resistance value of the resistor R2 is 2.2-10KΩ, and the power of the resistor R2 is 1 / 10W.
[0007] Furthermore, the capacitance of the electrolytic capacitor C1 is 22-100 μF, and the voltage of the electrolytic capacitor C1 is 10V; the capacitance of the capacitor C2 is 10-100 nF, and the voltage of the capacitor C2 is 25V.
[0008] The control circuit of the utility model prevents the shared power bank from reversely supplying power to the cabinet. The circuit is simple, has strong anti-interference ability, and is low in cost. It prevents the shared power bank from reversely supplying power to the shared charging cabinet. When the external power supply is disconnected, the indicator light and the QR code light of the shared charging cabinet are not lit at the same time, reminding customers that the shared charging cabinet is in an abnormal working state at this time. At the same time, it is also convenient for maintenance personnel to discover and repair it in time, avoid delaying maintenance, and avoid giving customers a bad experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is a schematic diagram of the control circuit that prevents the shared power bank from reversely supplying power to the cabinet in Example 1. DETAILED DESCRIPTION
[0010] The embodiments are only intended to illustrate one implementation of the present invention and are not intended to limit the scope of protection of the present invention.
[0011] Example 1
[0012] A control circuit to prevent shared power banks from reversely supplying power to the cabinet, such as Figure 1As shown, it includes a resistor R1, a resistor R2, an electrolytic capacitor C1, a capacitor C2 and a voltage detection chip U1, the resistance value of the resistor R1 is selected from 1 to 10Ω, the resistance value of the resistor R1 in this embodiment 1 is selected to be 10Ω, and the power of the resistor R1 is 1 / 4W; the resistance value of the resistor R2 is selected from 2.2 to 10KΩ, the resistance value of the resistor R2 in this embodiment 1 is selected to be 4.7KΩ, and the power of the resistor R2 is 1 / 10W; the capacitance value of the electrolytic capacitor C1 is selected from 22 to 100μF, the capacitance value of the electrolytic capacitor C1 in this embodiment 1 is selected to be 100μF, and the voltage of the electrolytic capacitor C1 is 10V; the capacitance value of the capacitor C2 is selected from 10 to 100nF, and the capacitance value of the capacitor C2 in this embodiment 1 is selected to be 10 0nF, the voltage of capacitor C2 is 25V; the power supply terminal VCC of the voltage detection chip U1, the positive terminal of the electrolytic capacitor C1, and the positive terminal of the capacitor C2 are respectively connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the power input terminal VDD of the shared charging cabinet control board. The ground terminal GND of the voltage detection chip U1, the negative terminal of the electrolytic capacitor C1, and the negative terminal of the capacitor C2 are respectively grounded. The reset terminal RST of the voltage detection chip U1 is connected to the power enable terminal PWR-EN-H of the control unit in the shared charging cabinet control board. The resistor R2 is connected in series between the power input terminal VDD of the shared charging cabinet control board and the power enable terminal PWR-EN-H of the control unit in the shared charging cabinet control board.
[0013] When the external power supply is working normally, the voltage detection chip U1 in the control circuit that prevents the shared power bank from reversely supplying power to the cabinet detects that the voltage of the power input terminal VDD of the shared charging cabinet control board has reached the preset voltage value to ensure the normal operation of the shared charging cabinet system. At this time, the control circuit that prevents the shared power bank from reversely supplying power to the cabinet does not work, and the power enable terminal PWR-EN-H of the control unit in the shared charging cabinet control board is pulled up to the power input terminal VDD of the shared charging cabinet control board through the resistor R2, ensuring that the power enable terminal of the control unit in the shared charging cabinet control board is at a high level, and the shared charging cabinet control system works normally; when the external power supply is disconnected, the shared power bank in the shared charging cabinet will serve as a power source to reversely supply power to the power input terminal of the shared charging cabinet control board. VDD is used for power supply, but since the shared power bank will have voltage loss during the reverse power supply process, the voltage detection chip U1 in the control circuit that prevents the shared power bank from reversely supplying power to the cabinet detects that the voltage of the power input terminal VDD of the shared charging cabinet control board is lower than the preset voltage value to ensure the normal operation of the shared charging cabinet system. At this time, the control circuit that prevents the shared power bank from reversely supplying power to the cabinet works, and the power enable terminal of the control unit in the shared charging cabinet control board is in a low-level state. The power supply circuit of the control unit in the shared charging cabinet control board does not work and is in a power-off state. At this time, the indicator lights and QR code lights controlled by the shared charging cabinet control board are all off, so that customers can understand that the shared charging cabinet is in an abnormal working state, and it is also convenient for maintenance personnel to discover and repair it in time.
Claims
1. A control circuit to prevent a shared power bank from supplying reverse power to a cabinet, characterized in that: It includes a resistor R1, a resistor R2, an electrolytic capacitor C1, a capacitor C2 and a voltage detection chip, wherein the power supply end of the voltage detection chip, the positive end of the electrolytic capacitor C1 and the positive end of the capacitor C2 are respectively connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the power input end of the shared charging cabinet control board, the ground end of the voltage detection chip, the negative end of the electrolytic capacitor C1 and the negative end of the capacitor C2 are respectively grounded, the reset end of the voltage detection chip is connected to the power enable end of the control unit in the shared charging cabinet control board, and the resistor R2 is connected in series between the power input end of the shared charging cabinet control board and the power enable end of the control unit in the shared charging cabinet control board.
2. The control circuit for preventing a shared power bank from supplying reverse power to a cabinet as claimed in claim 1, characterized in that: The resistance value of the resistor R1 is 1-10Ω, and the power of the resistor R1 is 1 / 4W; the resistance value of the resistor R2 is 2.2-10KΩ, and the power of the resistor R2 is 1 / 10W.
3. The control circuit for preventing a shared power bank from supplying reverse power to a cabinet as claimed in claim 1 or 2, characterized in that: The capacitance of the electrolytic capacitor C1 is 22-100 μF, and the voltage of the electrolytic capacitor C1 is 10 V; The capacitance of the capacitor C2 is 10-100nF, and the voltage of the capacitor C2 is 25V.