Self-locking wake-up circuit
By using a self-locking wake-up circuit and a tactile switch and control chip to detect button press time, the stability and reliability issues of the wake-up circuit before auxiliary power supply are solved, achieving stable power supply and power-off control of the circuit, and reducing costs.
Patent Information
- Application Number
- CN202420741063.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The existing wake-up circuits lack stability and reliability before the auxiliary power supply, resulting in malfunctions and high costs.
A self-locking wake-up circuit was designed, which utilizes a tactile switch, a relay RLY1, and a control chip. The control chip detects the duration of button presses to achieve self-locking and disconnection of the relay, ensuring that the circuit continues to be powered or is powered off after the button is released. The circuit uses an STM32F334R876 control chip and an HFG3-V/9 relay.
It achieves stable self-locking power supply or power failure of the circuit, ensures reliable start-up and shutdown of the auxiliary power circuit, reduces costs, and improves the operational stability and safety of the circuit.
Smart Images
Figure CN222321361U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuits, in particular to a self-locking wake-up circuit. Background Art
[0002] In order to promote the optimization and upgrading of the energy industry and achieve clean and low-carbon development, my country has vigorously developed clean energy in recent years, such as wind power and photovoltaics, and achieved leapfrog development. The proportion of new energy installed capacity has also increased. my country has implemented the new energy vehicle technology plan since the "15th Five-Year Plan" period. Many vehicle and parts companies, universities and research institutes, as well as many scientific and technological personnel have participated in the special research and development of electric vehicles. The key to the development of electric vehicles lies in whether Chinese companies can master core technologies. As one of the most important components of electric vehicles, the charging system has received more and more attention for its safety and reliability, which inevitably involves the auxiliary source circuit. Before the auxiliary source works normally, it needs to be powered by the wake-up circuit.
[0003] Therefore, it is necessary to provide a self-locking wake-up circuit with a simple structure, low cost, and sufficient stability to ensure smooth operation of the circuit. Utility Model Content
[0004] The utility model discloses a self-locking wake-up circuit, which relates to the technical field of electronic circuits for new energy vehicles and can effectively solve the technical problems involved in the background technology.
[0005] To achieve the above purpose, the technical solution of the utility model is:
[0006] A self-locking wake-up circuit comprises a touch switch, a relay RLY1 and a control chip, wherein the relay RLY1 comprises 8 pins, wherein a coil is connected between pin 1 and pin 8; a port 12V is connected to pin 3 of the relay RLY1, pin 1 of the relay RLY1, the negative end of a diode D1 and one end of a resistor R1, a pin 6 of the relay RLY1 is connected to pin 8 of the relay RLY1, the positive end of the diode D1 and the positive end of a diode D2, the negative end of the diode D2 is connected to the other end of the resistor R1, one end of the touch switch and one end of a resistor R2, the other end of the resistor R2 is connected to one end of a resistor R3 and a port KE_J, and a pin 4 of the relay RLY1 is connected to Port 12V_CK and one end of the resistor R6, pin 5 of the relay RLY1 is connected to the drain of the MOS tube Q2, the gate of the MOS tube Q2 is connected to the other end of the resistor R6, one end of the capacitor C1, one end of the resistor R7 and the collector of the transistor Q1, the base of the transistor Q1 is connected to one end of the resistor R5 and one end of the resistor R4, the other end of the resistor R4 is connected to port K01, the source of the MOS tube Q2, the other end of the capacitor C1, the other end of the resistor R7, the emitter of the transistor Q1, the other end of the resistor R5, the other end of the touch switch and the other end of the resistor R3 are connected to port GND; the port KE_J and the port K01 are connected to the control chip.
[0007] The utility model circuit provides a one-key self-locking control method for a wake-up circuit. The control chip detects the length of time the key is pressed. During the instantaneous action of the first pressing and releasing, the circuit forms a self-locking state, and supplies power to the auxiliary source through the 12V_CK output voltage. When the key is pressed for a second time, a low level is detected, and a high level is output to disconnect the relay, so that the circuit is in a non-working state, and the power supply of the auxiliary source is turned off.
[0008] As a preferred improvement of the present invention: the port 12V is connected to a 12V battery.
[0009] As a preferred improvement of the present invention: the port 12V_CK is connected to an auxiliary source circuit.
[0010] As a preferred improvement of the utility model: the relay RLY1 model is HFG3-V / 9.
[0011] As a preferred improvement of the present invention: the control chip model is STM32F334R876.
[0012] As a preferred improvement of the utility model: when not working, pin 3 of the relay RLY1 is connected to pin 2 of the relay RLY1, and pin 6 of the relay RLY1 is connected to pin 7 of the relay RLY1; when the touch switch is briefly touched, pin 3 of the relay RLY1 is connected to pin 4 of the relay RLY1, and pin 6 of the relay RLY1 is connected to pin 5 of the relay RLY1.
[0013] As a preferred improvement of the present invention: after the control chip detects a low level through the port KE_J for a certain period of time, it sends a high level through the port K01.
[0014] As a preferred improvement of the present invention: after the control chip detects a low level for 2 seconds, it sends a high level through the port K01.
[0015] The beneficial effects of the utility model are as follows:
[0016] The wake-up circuit is mainly composed of relays, triodes, MOS tubes and a control chip. The control chip detects the length of time the button is pressed and controls the on / off state of the relay. When the control chip does not detect a low-level signal for a certain period of time, the circuit is always in a self-locking state and outputs 12V_CK to wake up the auxiliary source. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0018] Figure 1 The utility model is a schematic diagram of a self-locking wake-up circuit. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0020] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0021] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0022] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0024] See also Figure 1As shown, the utility model provides a self-locking wake-up circuit, including a touch switch, a relay RLY1 and a control chip, wherein the relay RLY1 includes 8 pins, wherein a coil is connected between pin 1 and pin 8, and pins 3 and 6 are provided with a connecting rod. Port 12V (power input) is connected to pin 3 of the relay RLY1, pin 1 of the relay RLY1, the negative end of the diode D1 and one end of the resistor R1, pin 6 of the relay RLY1 is connected to pin 8 of the relay RLY1, the positive end of the diode D1 and the positive end of the diode D2, the negative end of the diode D2 is connected to the other end of the resistor R1, one end of the touch switch and one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R3 and port KE_J (detection signal), pin 4 of the relay RLY1 is connected to port 12V_CK (power output) and one end of the resistor R6, and the relay RLY1 Pin 5 is connected to the drain of MOS tube Q2, the gate of MOS tube Q2 is connected to the other end of resistor R6, one end of capacitor C1, one end of resistor R7 and the collector of transistor Q1, the base of transistor Q1 is connected to one end of resistor R5 and one end of resistor R4, the other end of resistor R4 is connected to port K01 (control signal), the source of MOS tube Q2, the other end of capacitor C1, the other end of resistor R7, the emitter of transistor Q1, the other end of resistor R5, the other end of touch switch and the other end of resistor R3 are connected to port GND, and the port KE_J and the port K01 are connected to the control chip. In this embodiment, the port 12V is connected to a 12V battery, the port 12V_CK is connected to an auxiliary source circuit, the relay RLY1 model is HFG3-V / 9, and the control chip model is STM32F334R876.
[0025] It has a self-locking function of a one-button wake-up circuit. When the button is pressed and released immediately, the relay can be kept in working state by relying on the circuit, complete self-locking, output 12V_CK, and wake up the low-voltage auxiliary source. When not working, the pin 3 of the relay RLY1 is connected to the pin 2 of the relay RLY1, and the pin 6 of the relay RLY1 is connected to the pin 7 of the relay RLY1; when the touch switch is briefly touched, the pin 3 of the relay RLY1 is connected to the pin 4 of the relay RLY1, and the pin 6 of the relay RLY1 is connected to the pin 5 of the relay RLY1. After the control chip detects a low level for a certain period of time through the port KE_J, a high level is sent through the port K01. Preferably, the control chip sends a high level through the port K01 after detecting a low level for 2S.
[0026] Boot working status:
[0027] When the touch switch (on / off button) is pressed, the 12V voltage is connected to the ground through the relay coil and diode D2. Since the coil has current passing through it, the contacts are switched from 2 and 7 to 4 and 5. At this time, the control chip detects a low level, but due to the short time, it will not send a shutdown signal. After pressing the switch, let go, and the 12V is connected to the ground through the electric contacts 3 and 4 and R6 and R7. R7 divides the voltage to 6V, the N-MOS tube is turned on, and the 12V voltage is connected to the ground through the relay coil, electric contacts 6 and 5, and the MOS tube. In this process, since the coil has current passing through it all the time, the relay is always in a closed state, forming a self-locking situation.
[0028] Shutdown working condition:
[0029] After long pressing the touch switch (on / off button) and then releasing it, the control chip detects the duration of the low level (2-4S) through the KE_J port and sends a shutdown command, that is, K01 sends a high level, the NPN transistor is turned on, the MOS tube g-pole level is pulled low, the MOS tube is turned off, the relay contact is switched from 4, 5 back to 2, 7, the relay is disconnected, and the coil releases energy through the loop formed with D1, D2, and R1.
[0030] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and the implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A self-locking wake-up circuit, characterized in that: It includes a touch switch, a relay RLY1 and a control chip, wherein the relay RLY1 includes 8 pins, wherein a coil is connected between pin 1 and pin 8; Port 12V is connected to pin 3 of the relay RLY1, pin 1 of the relay RLY1, the negative end of the diode D1 and one end of the resistor R1, pin 6 of the relay RLY1 is connected to pin 8 of the relay RLY1, the positive end of the diode D1 and the positive end of the diode D2, the negative end of the diode D2 is connected to the other end of the resistor R1, one end of the touch switch and one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R3 and port KE_J, pin 4 of the relay RLY1 is connected to port 12V_CK and one end of the resistor R6, and the relay RLY1 is connected to pin 12V_CK and one end of the resistor R6. Pin 5 of the electrical appliance RLY1 is connected to the drain of the MOS tube Q2, the gate of the MOS tube Q2 is connected to the other end of the resistor R6, one end of the capacitor C1, one end of the resistor R7 and the collector of the transistor Q1, the base of the transistor Q1 is connected to one end of the resistor R5 and one end of the resistor R4, the other end of the resistor R4 is connected to the port K01, the source of the MOS tube Q2, the other end of the capacitor C1, the other end of the resistor R7, the emitter of the transistor Q1, the other end of the resistor R5, the other end of the touch switch and the other end of the resistor R3 are connected to the port GND; The port KE_J and the port K01 are connected to the control chip.
2. A self-locking wake-up circuit according to claim 1, characterized in that: The 12V port is connected to a 12V battery.
3. A self-locking wake-up circuit according to claim 1, characterized in that: The port 12V_CK is connected to an auxiliary power circuit.
4. The self-locking wake-up circuit according to claim 1, characterized in that: The relay RLY1 is of model HFG3-V / 9.
5. The self-locking wake-up circuit according to claim 1, characterized in that: The control chip model is STM32F334R876.
6. A self-locking wake-up circuit according to claim 1, characterized in that: When not working, the pin 3 of the relay RLY1 is connected to the pin 2 of the relay RLY1, and the pin 6 of the relay RLY1 is connected to the pin 7 of the relay RLY1; When the touch switch is briefly touched, the pin 3 of the relay RLY1 is connected to the pin 4 of the relay RLY1, and the pin 6 of the relay RLY1 is connected to the pin 5 of the relay RLY1.
7. A self-locking wake-up circuit according to claim 1, characterized in that: After the control chip detects a low level through the port KE_J for a certain period of time, it sends a high level through the port K01.
8. A self-locking wake-up circuit according to claim 7, characterized in that: After the control chip detects a low level for 2 seconds, it sends a high level through the port K01.