Key anti-jamming circuit
By simplifying the button anti-jamming circuit design, the problem of battery pack switch jamming is solved by using the lithium battery pack and MOSFET to detect button jamming, thereby reducing costs and improving the battery pack's lifespan and market competitiveness.
Patent Information
- Application Number
- CN202422928586.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing battery pack switches are prone to jamming, leading to rapid power consumption and shortened lifespan. Furthermore, existing control solutions are complex, costly, and lack market competitiveness.
A combined circuit consisting of a lithium battery pack, a push-button switch module, an MCU module, a button wake-up module, a button jamming detection module, and a communication module is used. The button jamming detection is achieved using a MOSFET, simplifying the circuit structure.
This results in a simple and low-cost circuit, reduces the difficulty of PCB layout, and improves the battery pack's lifespan and market competitiveness.
Smart Images
Figure CN223514880U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a button anti-jamming circuit. Background Technology
[0002] With the continuous development of the times, more and more portable power tools are entering every corner of life, which leads to an increasing demand for battery packs and a continuous improvement in the requirements for battery pack functions; the switch function is an important function of battery packs.
[0003] The switch is a crucial way to wake up the battery pack. Because there are many different types of switches on the market, and battery pack structures vary, switches often get stuck during daily use. This causes the battery to remain constantly awake, continuously draining the battery and eventually depleting its power, reducing battery life, or even rendering the battery pack completely unusable.
[0004] Currently, there are many existing control schemes, mainly using a combination of multiple transistors and MOSFETs for control. The circuits are relatively complex, which increases the difficulty of PCB layout to a certain extent and the cost is relatively high. In such a competitive market, the products are less competitive.
[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a new type of button anti-jamming circuit with greater industrial application value. Utility Model Content
[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a button anti-jamming circuit.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A button anti-jamming circuit includes a lithium battery pack. The output terminal of the lithium battery pack is connected to the input terminal of a push-button switch module. The output terminal of the push-button switch module is connected to the input terminal of an MCU module. The output terminal of the MCU module is connected to the input terminal of a button wake-up module. The output terminal of the push-button switch module is connected to the input terminal of a button jam detection module. The output terminal of the button jam detection module is connected to the input terminal of the MCU module. The output terminal of the MCU module is connected to an external device via a communication module. The power supply terminal of the lithium battery pack is connected to the input terminals of the button wake-up module, the button jam detection module, the communication module, and the MCU module.
[0009] Preferably, in the button anti-jamming circuit, the MCU module is model SH39F323C.
[0010] Preferably, in the aforementioned button anti-jamming circuit, the communication module is a UART communication module.
[0011] Preferably, in the aforementioned button anti-jamming circuit, the button jamming detection module is a MOSFET, specifically model 2N7002k.
[0012] By means of the above solution, this utility model has at least the following advantages:
[0013] This invention features a simple circuit that can achieve circuit stability with fewer components, thereby reducing costs.
[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the principle of this utility model;
[0017] Figure 2 This is the actual circuit diagram of this utility model. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0020] Example
[0021] like Figure 1As shown, a button anti-jamming circuit includes a lithium battery pack 1. The output terminal of the lithium battery pack 1 is connected to the input terminal of a push-button switch module 2. The output terminal of the push-button switch module 2 is connected to the input terminal of an MCU module 6. The output terminal of the MCU module 6 is connected to the input terminal of a button wake-up module 3. The output terminal of the push-button switch module 2 is connected to the input terminal of a button jam detection module 4. The output terminal of the button jam detection module 4 is connected to the input terminal of the MCU module 6. The output terminal of the MCU module 6 is connected to an external device through a communication module 5. The power supply terminal of the lithium battery pack 1 is connected to the input terminals of the button wake-up module 3, the button jam detection module 4, the communication module 5, and the MCU module 6.
[0022] The MCU module 6 described in this utility model is model number SH39F323C.
[0023] The communication module 5 described in this utility model is a UART communication module.
[0024] The button jamming detection module 4 described in this utility model is a MOS transistor, model number 2N7002k.
[0025] The working principle of this utility model is as follows:
[0026] In specific work, such as Figure 2 As shown, this utility model is based on identifying button status and waking up through KEY and WAKEUP.
[0027] When switch SW1 is pressed, the KEY voltage is pulled low, and the MCU module recognizes this and wakes up the system; when the switch is released, the KEY voltage becomes 5V, and after a delay, the system re-enters sleep mode.
[0028] When the DA terminal starts communicating with the outside, the voltage of the DA terminal is 5V. The voltage between g and s of MOSFET Q1 is greater than the turn-on voltage, so MOSFET Q1 is turned on. WAKEUP is turned on to GND. The MCU module recognizes this and wakes up the system. At the same time, the communication module starts working.
[0029] When the button is stuck and cannot rebound, the voltage at the KEY pin remains low. After a period of time (defined by those skilled in the art), because the MCU module detects that the low voltage period exceeds the button-stuck protection time, the MCU module will enter sleep mode. If communication begins at the DA terminal at this time, the system will wake up. To exit this state, release the button, the KEY pin voltage will return to 5V, and then press the button again to wake up the system.
[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0031] In the description of this application, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0032] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0033] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A button anti-jamming circuit, comprising a lithium battery pack (1), characterized in that: The output terminal of the lithium battery pack (1) is connected to the input terminal of the push switch module (2). The output terminal of the push switch module (2) is connected to the input terminal of the MCU module (6). The output terminal of the MCU module (6) is connected to the input terminal of the button wake-up module (3). The output terminal of the push switch module (2) is connected to the input terminal of the button jam detection module (4). The output terminal of the button jam detection module (4) is connected to the input terminal of the MCU module (6). The output terminal of the MCU module (6) is connected to an external device through the communication module (5). The power supply terminal of the lithium battery pack (1) is connected to the input terminals of the button wake-up module (3), the button jam detection module (4), the communication module (5), and the MCU module (6).
2. The button anti-jamming circuit according to claim 1, characterized in that: The MCU module (6) is model SH39F323C.
3. The button anti-jamming circuit according to claim 1, characterized in that: The communication module (5) is a UART communication module.
4. The button anti-jamming circuit according to claim 1, characterized in that: The button jamming detection module (4) is a MOS transistor, model number 2N7002k.