Power bank
By introducing an interface module, control module, and power trigger circuit into the power bank, reverse charging functionality is achieved, solving the problem of the power bank cabinet being unable to be returned after a power outage and improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-04-07
AI Technical Summary
After the power bank cabinet loses power, the shared power banks cannot be returned normally, resulting in economic losses and user dissatisfaction.
Design a power bank that includes an interface module, a control module, a charging management chip, and a power trigger circuit. By connecting the power trigger circuit with the charging management chip and the control module, a reverse charging function is achieved, enabling the power bank to provide power to the charging station when it loses power, and supporting the return service of the power bank.
When the power bank cabinet loses power, the power bank can reverse charge to provide power to the cabinet, ensuring that users can return the power bank normally and improving the user experience.
Smart Images
Figure CN224097453U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power management, and in particular to a power bank. Background Technology
[0002] Shared power banks are a type of mobile power rental service designed to solve the problem of insufficient battery power for mobile phones or other electronic devices when people are out and about and cannot charge them in a timely manner. Shared power banks operate by setting up rental points in public places, allowing people to easily obtain and return shared power banks by scanning a QR code.
[0003] Power bank rental points typically have charging stations. These stations connect to mains power and not only charge the shared power banks inside but also provide rental and return services. If the power is cut off, charging stops, and the rental and return services cease. Users who have already rented power banks will then search for a charging station to return them. If a station is found but cannot be used for return, it not only results in users continuing to incur charges for their power banks but also causes dissatisfaction and a crisis of trust. Therefore, how to return power banks after a power station loses power has become a pressing issue. Utility Model Content
[0004] This application provides a power bank to at least solve the problem in related technologies where shared power banks cannot be returned after a power outage at the charging station.
[0005] In a first aspect, embodiments of this application provide a power bank, which includes: an interface module, a control module, a charging management chip, and a power triggering circuit;
[0006] The interface module is used for electrical connection to the power bank cabinet.
[0007] The charging management chip includes a first power supply pin and a first CC signal pin, wherein the first power supply pin is used to connect to the interface module;
[0008] The power trigger circuit includes: a switching transistor, a first control pin for electrical connection to the control module, and a second CC signal pin for electrical connection to the first CC signal pin.
[0009] The switching transistor includes a control electrode connected to a first control pin, a first electrode connected to a second CC signal pin, and a second electrode grounded.
[0010] In one embodiment, the power-triggered circuit includes: a first resistor;
[0011] One end of the first resistor is electrically connected to the first electrode, and the other end is electrically connected to the second CC signal pin.
[0012] In one embodiment, the power trigger circuit further includes a second resistor and a third resistor;
[0013] One end of the second resistor is electrically connected to the control pin, and the other end is electrically connected to the control electrode and the third resistor;
[0014] One end of the third resistor is connected to ground, and the other end is electrically connected to the control electrode and the second resistor, so that they form a voltage divider branch for the control electrode.
[0015] In one embodiment, the control module includes a first transmit pin and a first receive pin, and the interface module includes a second transmit pin and a second receive pin.
[0016] The first transmit pin is electrically connected to the second transmit pin;
[0017] The first receive pin is electrically connected to the second interface pin.
[0018] In one embodiment, the control module further includes: a second control pin;
[0019] The second control pin is electrically connected to the first control pin.
[0020] In one embodiment, the interface module further includes: a second power supply pin;
[0021] The second power supply pin is used for electrical connection with the first power supply pin.
[0022] In one embodiment, the charging management chip includes:
[0023] The first CC signal pin is used for electrical connection with the second CC signal pin.
[0024] The power bank provided in this application embodiment has at least the following technical effects.
[0025] The power trigger circuit is electrically connected to the charging management chip via the second CC signal pin and to the control module via the first control pin. The control module controls the power trigger circuit, causing the first and second terminals of the switching transistor to conduct, thereby transmitting a signal from the second CC signal pin to the charging management chip. The charging management chip then controls the power bank to receive and transmit power through the interface module, thus enabling the power bank to reverse charge the charging station.
[0026] 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
[0027] 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:
[0028] Figure 1 This is a schematic diagram illustrating the internal circuit connection of a power bank according to an exemplary embodiment;
[0029] Figure 2 This is a schematic diagram of a power triggering circuit according to an exemplary embodiment;
[0030] Figure 3 This is a schematic diagram illustrating the internal structure of a power bank according to an exemplary embodiment. Detailed Implementation
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] A power bank kiosk is an automated device that provides mobile power bank rental services. It contains several charging slots, each holding only one power bank. Users select a power bank to rent via an app, which unlocks the corresponding slot, allowing the user to retrieve the power bank. When returning the power bank, the user simply inserts it into an empty slot. The kiosk's system automatically detects the returned power bank, locks it, starts charging it, and stops billing.
[0036] Firstly, embodiments of this application provide a power bank. Figure 1 This is a schematic diagram illustrating the internal circuit connection of a power bank according to an exemplary embodiment, such as... Figure 1 As shown, the power bank includes:
[0037] Interface module, control module, charging management chip and power trigger circuit;
[0038] The interface module is used for electrical connection to the power bank cabinet.
[0039] The charging management chip includes a first power supply pin and a first CC signal pin, wherein the first power supply pin is used to connect to the interface module;
[0040] The power trigger circuit includes: a switching transistor, a first control pin for electrical connection to the control module, and a second CC signal pin for electrical connection to the first CC signal pin.
[0041] The switching transistor includes a control electrode connected to a first control pin, a first electrode connected to a second CC signal pin, and a second electrode grounded.
[0042] Based on the embodiments of this application, a power triggering circuit, a charging management chip, an interface module, and a control module are provided to support the power bank to achieve two working modes: reverse charging and forward charging.
[0043] Specifically, reverse charging includes the following data transfer:
[0044] The internal circuitry of the charging management chip generates a CC signal on the first CC signal pin, where the CC signal is a square wave pulse. The first CC signal pin is electrically connected to the second CC signal pin, and transmits the CC signal to the second CC signal pin.
[0045] The control module is electrically connected to the first control pin of the power trigger circuit and transmits a high-level signal to the power trigger circuit through the first control pin. Based on the high level received on the first control pin (i.e., the first control pin is pulled high), the power trigger circuit applies a voltage to the control electrode of the switching transistor, making the voltage difference between the control electrode and the second electrode greater than or equal to the threshold voltage of the switching transistor, thus turning on the first and second electrodes of the switching transistor. When the first and second electrodes are turned on, the CC signal in the second CC signal pin is pulled down to a fixed level signal. The power trigger circuit transmits the fixed-level signal to the charging management chip through the second CC signal pin.
[0046] After receiving a fixed-level signal on its first CC signal pin, the charging management chip triggers its internal circuitry to generate a voltage on its first power supply pin. The charging management chip then transmits this voltage to the interface module via the first power supply pin. The interface module then transmits the voltage to the power bank cabinet, enabling the power bank to charge the cabinet in reverse. Optionally, the voltage generated by the charging management chip can be 5V, 6V, or 10V. Optionally, the switching transistor includes a bipolar transistor, a field-effect transistor, an insulated-gate bipolar transistor, a thyristor, and related devices.
[0047] Forward charging includes the following data transfer:
[0048] The power bank cabinet communicates with the power bank via an interface module to determine if the cabinet is operational. The interface module receives power from the cabinet and transmits it to the charging management chip, thus powering the chip and enabling the cabinet to charge the power bank.
[0049] Through these two operating modes, the power bank locker can charge power banks and provide rental and return services to users during normal operation. When the locker loses power, the power banks reverse-charge, providing power to the locker. Because the power provided by power banks differs significantly from AC mains power, the locker cannot maintain all its functions solely based on the power from the power banks; however, it can still provide power bank return services, thus improving the user experience.
[0050] In one embodiment, Figure 2 This is a schematic diagram of a power triggering circuit according to an exemplary embodiment, such as... Figure 2 As shown, the power bank's power trigger circuit includes: a first resistor;
[0051] One end of the first resistor is electrically connected to the first electrode, and the other end is electrically connected to the second CC signal pin.
[0052] When the power bank is in reverse charging mode, with the first and second terminals conducting, the second CC signal pin is pulled down to ground through the first resistor, making the CC signal a fixed-level signal. The second CC signal pin transmits the fixed-level signal to the first CC signal pin, so that the charging management chip can obtain the voltage based on the fixed-level signal.
[0053] The power trigger circuit also includes: a second resistor and a third resistor;
[0054] One end of the second resistor is electrically connected to the control pin, and the other end is electrically connected to the control electrode and the third resistor;
[0055] One end of the third resistor is connected to ground, and the other end is electrically connected to the control electrode and the second resistor, so that they form a voltage divider branch for the control electrode.
[0056] The second and third resistors form a voltage divider branch for the control electrode. When the first control pin receives a high level, the voltage difference between the control electrode and the second electrode is greater than the threshold voltage through the voltage divider branch, thus turning on the switching transistor; that is, the first and second electrodes are turned on.
[0057] In one embodiment, the control module includes a first transmit pin and a first receive pin, and the interface module includes a second transmit pin and a second receive pin.
[0058] The first transmitting pin is electrically connected to the second transmitting pin;
[0059] The first receiving pin is electrically connected to the second receiving pin.
[0060] The control module also includes: a second control pin;
[0061] The second control pin is used for electrical connection with the first control pin.
[0062] The communication between the power bank cabinet and the control module relies on an interface module, which specifically includes:
[0063] The interface module receives either a first command or a second command from the power bank cabinet via its second receiving pin and transmits this information to the first receiving pin of the control module. Based on the received command, the control module controls the second control pin. If the received command is the first command, the second control pin is pulled high, resulting in a high-level signal on the first control pin. If the received command is the second command, the second control pin is pulled low, resulting in a low-level signal on the first control pin.
[0064] After receiving instructions from the power bank cabinet, the control module controls the power bank's operating mode, specifically including:
[0065] The control module is electrically connected to the second receiving pin of the interface module via a first receiving pin, and the first transmitting pin is electrically connected to the second transmitting pin of the interface module, thereby enabling communication between the control module and the power bank cabinet through the interface module. Specifically, in the forward charging mode, the control module receives commands sent by the power bank cabinet through the second receiving pin of the interface module, enabling communication between the power bank cabinet and the control module, and supplies power to the charging management chip through the interface module to complete the forward charging of the power bank.
[0066] In reverse charging mode, the power bank cabinet sends a first command to the second receiving pin of the interface module, and the control module receives the first command through the first receiving pin. Based on the received command, the first receiving pin of the control module pulls up the level of the second control pin, causing the first control pin of the power trigger circuit to receive a high-level signal. Based on this high-level signal, the voltage difference between the control electrode and the second electrode of the switching transistor is greater than or equal to the threshold voltage, causing the first and second electrodes of the switching transistor to conduct. The first resistor pulls the second CC signal pin down to ground, making the CC signal a fixed-level signal. The second CC signal pin transmits the fixed-level signal to the first CC signal pin, allowing the charging management chip to obtain the voltage based on the fixed-level signal. The charging management chip then charges the power bank cabinet through the interface module.
[0067] Specifically, if the power bank cabinet is set to shut down at 10 PM, it will send a first command to the second receiving pin of the interface module before shutting down, either with a delay or immediately, to initiate the reverse charging mode. For example, if the power bank cabinet is set to shut down at 10 PM and the command is sent immediately, at 10 PM, the power bank cabinet will send the first command to the second receiving pin of the interface module, causing the control module to pull up the level of the second control pin and initiate the reverse charging mode.
[0068] If the power bank cabinet's transmission method is set to delayed transmission, the cabinet sends a first command containing delay information before the set shutdown time. Based on this delay information, the control module raises the level of the second control pin after the delay, thereby initiating the reverse charging mode via the power trigger circuit. For example, if the power bank cabinet is set to shut down at 10 PM, it sends a first command to the second receiving pin of the interface module at 9:30 PM, containing a delay of 40 minutes to activate the reverse charging mode. After receiving the first command through the first receiving pin, the control module raises the level of the second control pin after a 40-minute delay, thus activating the reverse charging mode at 10:10 PM.
[0069] In another embodiment, the power bank cabinet sends a first command, which is transmitted to the control module through the second receiving pin of the interface module, and sends heartbeat data to the power bank. The heartbeat data represents data with periodic characteristics sent by the cabinet over a period of time, including pulse data and marker data. When the control module receives the heartbeat data, it indicates that the power bank cabinet is in operation. If no heartbeat data is received within a preset time, it indicates that the power bank cabinet is in a power-off state. The control module pulls up the level of the second control pin, causing the first control pin of the power trigger circuit to receive a high-level signal. Based on the high-level signal, the voltage difference between the control electrode and the second electrode of the switching transistor is greater than or equal to the threshold voltage, causing the first and second electrodes of the switching transistor to conduct. The first resistor pulls down the second CC signal pin to ground, making the CC signal in the second CC signal pin a fixed-level signal, which is then transmitted to the first CC signal pin so that the charging management chip can obtain the voltage based on the fixed-level signal. The charging management chip charges the power bank cabinet through the interface module.
[0070] In another embodiment, the power bank cabinet sends a second command to the second receiving pin of the interface module. This second command is then transmitted to the control module via the second receiving pin. The first receiving pin of the control module receives the second command and, according to the second control command, pulls down the level of the second control pin. At this time, the voltage between the control electrode and the second electrode is less than a threshold voltage, causing the first and second electrodes of the switching transistor to be blocked. This achieves the purpose of shutting down the charging management chip and stopping it from outputting voltage. Thus, the power bank cabinet supplies power to the charging management chip through the interface module, allowing the power bank to re-enter the forward charging mode.
[0071] It should be noted that the first instruction and the second instruction are different.
[0072] In another embodiment, the interface module further includes: a second power supply pin;
[0073] The second power supply pin is used for electrical connection with the first power supply pin.
[0074] The power bank's ability to achieve forward and reverse charging modes relies on its interface module, which specifically includes:
[0075] When the power bank is in forward charging mode, the power bank cabinet supplies power to the charging management chip through the second power pin to charge the power bank.
[0076] When the power bank is in reverse charging mode, the first power pin of the charging management chip obtains the voltage and transmits it to the second power pin, which then supplies power to the power bank cabinet, thus charging the power bank cabinet.
[0077] In another embodiment, the charging management chip includes:
[0078] The first CC signal pin is used for electrical connection with the second CC signal pin.
[0079] The charging management chip continuously generates a CC signal on the first CC signal pin through its internal circuitry. This first CC signal pin transmits the CC signal, which is a square wave pulse signal, to the second CC signal pin. Because the first and second electrodes of the switching diode are in a blocking state, both the first and second CC pins are in a floating state, meaning they do not receive the protocol signal. When the second CC signal pin is pulled down to ground, the CC signal becomes a fixed-level signal, which is the protocol signal. The first CC signal pin receives the fixed-level signal and activates the voltage supply on the first power pin accordingly; that is, the first power pin generates voltage, which is used to charge the charging station.
[0080] In one embodiment, Figure 3 This is a schematic diagram illustrating the internal structure of a power bank according to an exemplary embodiment, such as... Figure 3 As shown, the switching transistor is a field-effect transistor, with the control electrode being the gate, the first electrode being the source, and the second electrode being the drain. The interface module uses a POGOPIN, and the control module uses an MCU microcontroller. Each module is connected according to the above electrical connection method, and based on the instructions sent by the power bank cabinet, the operating mode of the power bank is switched, enabling forward charging of the power bank and reverse charging of the power bank cabinet via the power bank.
[0081] In summary, the power bank provided in this application embodiment is electrically connected through an interface module, a charging management chip, a power trigger circuit, and a control module. A first command from the power bank cabinet pulls the level of the second control pin of the control module high, causing the first control pin of the power trigger circuit to acquire a high level. This results in the voltage difference between the control electrode and the second electrode exceeding a threshold voltage, thus connecting the first and second electrodes. In the power trigger circuit, when the first and second electrodes are connected, the first resistor pulls the second CC signal pin low to ground, converting the CC signal into a fixed-level signal. When the first CC signal pin acquires a fixed-level signal, it activates the voltage supply on the first power pin, i.e., the first power pin generates voltage. This voltage is transmitted through the first power pin to the second power pin, and then charges the power bank cabinet through the second power pin, achieving reverse charging from the power bank to the power bank cabinet. This solves the problem in related technologies where the power bank cannot be returned after the cabinet is powered off.
[0082] 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 bank, characterized in that, The power bank includes: an interface module, a control module, a charging management chip, and a power triggering circuit; The interface module is used for electrical connection to the power bank cabinet. The charging management chip includes: a first power pin and a first CC signal pin, wherein the first power pin is used to connect to the interface module; The power trigger circuit includes: a switching transistor, a first control pin electrically connected to the control module, and a second CC signal pin electrically connected to the first CC signal pin. The switching transistor includes a control electrode connected to the first control pin, a first electrode connected to the second CC signal pin, and a second electrode grounded.
2. The power bank according to claim 1, characterized in that, The power trigger circuit includes: a first resistor, One end of the first resistor is electrically connected to the first electrode, and the other end is electrically connected to the second CC signal pin.
3. The power bank according to claim 2, characterized in that, The power trigger circuit further includes: a second resistor and a third resistor; One end of the second resistor is electrically connected to the control pin, and the other end is electrically connected to the control electrode and the third resistor; One end of the third resistor is connected to ground, and the other end is electrically connected to the control electrode and the second resistor, so as to form a voltage divider branch of the control electrode.
4. The power bank according to claim 1, characterized in that, The control module includes a first transmit pin and a first receive pin, and the interface module includes a second transmit pin and a second receive pin. The first transmitting pin is electrically connected to the second transmitting pin; The first receiving pin is electrically connected to the second receiving pin.
5. The power bank according to claim 4, characterized in that, The control module further includes: a second control pin; The second control pin is electrically connected to the first control pin.
6. The power bank according to claim 4, characterized in that, The interface module also includes: a second power supply pin; The second power supply pin is used for electrical connection with the first power supply pin.
7. The power bank according to claim 1, characterized in that, The charging management chip includes: The first CC signal pin is electrically connected to the second CC signal pin.