AC commercial power monopulse wake-up circuit

Abstract

The utility model provides an AC commercial power monopulse wake-up circuit, and when the circuit is connected with commercial power, the circuit only outputs one pulse wake-up signal. The wake-up circuit comprises a rectification energy storage circuit, a pulse width adjusting circuit and an isolation output circuit. The rectification energy storage circuit charges the bus capacitor C21 and supplies power to the pulse width adjusting circuit when the commercial power is in a positive half cycle, and the rectification energy storage circuit discharges power to supply power to the pulse width adjusting circuit through the bus capacitor C21 when the commercial power is in a negative half cycle; a capacitor C20 is arranged in the pulse width adjusting circuit, when the capacitor C20 is not fully charged, current flows through the input end of the isolation output circuit, and the output end of the isolation output circuit outputs a pulse signal; when the capacitor C20 is fully charged, no current flows through the input end of the isolation output circuit, and the output end of the isolation output circuit stops outputting the pulse signal.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, specifically to an AC wake-up circuit and an energy storage power supply. Background Technology

[0002] With further breakthroughs in lithium battery technology, energy storage products have experienced rapid development, especially residential energy storage products. Because residential energy storage integrates photovoltaic, energy storage, and charging, it solves the problem of unstable power systems and is therefore gaining increasing popularity among users. Residential energy storage products involve AC (Alternating Current) charging and PV (Photovoltaic) charging. AC charging primarily involves two methods: manual button initiation of charging via the BMS (Battery Management System), and AC activation of the BMS system. Currently, solutions for AC activation of the BMS system are relatively limited. A common approach involves designing an auxiliary power supply (SPS). Once the AC power supply enables the SPS to function properly, an MCU (Microcontroller Unit) or other specific circuitry generates an activation signal for the BMS system to activate charging. This common approach effectively and reliably activates the BMS system, but the circuit design is complex and the product cost is high.

[0003] The existing AC mains power wake-up technology involves outputting a long low or long high level signal through an isolation circuit and a wake-up circuit after AC power is connected, in order to wake up the electrical equipment.

[0004] Current AC wake-up circuit technology outputs a long low or long high level, meaning that the wake-up circuit output is always working, which brings additional energy loss. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide an AC mains single-pulse wake-up circuit, which does not need to work continuously after outputting the wake-up signal, thus reducing energy loss.

[0006] To solve the above-mentioned technical problems, this utility model provides an AC mains power single-pulse wake-up circuit. When the circuit is connected to mains power, the circuit outputs one and only one pulse wake-up signal.

[0007] In a preferred embodiment, it includes a rectifier energy storage circuit, a pulse width adjustment circuit, and an isolated output circuit;

[0008] The rectifier energy storage circuit charges the bus capacitor C21 and supplies power to the pulse width adjustment circuit when the mains power is in the positive half-cycle. When the mains power is in the negative half-cycle, the rectifier energy storage circuit discharges through the bus capacitor C21 to supply power to the pulse width adjustment circuit.

[0009] The pulse width adjustment circuit includes a capacitor C20. When the capacitor C20 is not fully charged, current flows through the input terminal of the isolation output circuit, and the output terminal of the isolation output circuit outputs a pulse signal. When the capacitor C20 is fully charged, no current flows through the input terminal of the isolation output circuit, and the output terminal of the isolation output circuit stops outputting pulse signals.

[0010] In a preferred embodiment: the rectifier energy storage circuit includes a diode D1 and a bus capacitor C21. The anode of the diode D1 is connected to the live wire of the AC mains, and the cathode is connected to one end of the bus capacitor C21 and the pulse width adjustment circuit; the other end of the bus capacitor C21 is connected to the neutral wire of the AC mains.

[0011] In a preferred embodiment: the capacitor C20 is connected between the cathode of diode D1 and the isolation output circuit.

[0012] In a preferred embodiment: the isolation output circuit is an optocoupler.

[0013] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0014] This invention provides an AC mains single-pulse wake-up circuit. After connecting to AC mains, the isolated output circuit begins to output a continuous pulse signal. Simultaneously, capacitor C20 in the pulse width adjustment circuit is continuously charging. Once capacitor C20 is fully charged, the isolated output circuit stops outputting the pulse signal because it is no longer powered. The pulse signal width is determined by the charging time of capacitor C20. Therefore, the wake-up circuit outputs a single-pulse wake-up signal. Once the pulse signal stops, the entire wake-up circuit ceases operation unless it is disconnected from and reconnected to the mains, at which point it will output the pulse signal again. This reduces energy loss. Attached Figure Description

[0015] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0016] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0017] This utility model provides an AC mains single-pulse wake-up circuit, including a rectifier energy storage circuit, a pulse width adjustment circuit, and an isolation output circuit;

[0018] The rectifier energy storage circuit includes a diode D1 and a bus capacitor C21. The anode of the diode D1 is connected to the live wire of the AC mains, and the cathode is connected to one end of the bus capacitor C21 and the pulse width adjustment circuit. The other end of the bus capacitor C21 is connected to the neutral wire of the AC mains. The bus capacitor C21 is also connected in parallel with a resistor R68.

[0019] The pulse width adjustment circuit includes a capacitor C20 and a resistor R10, which are connected in series between the cathode of diode D1 and the isolation output circuit. One end of capacitor C20 connected to resistor R10 is connected to the neutral terminal of the AC mains power supply through resistor R23.

[0020] The isolated output circuit is an optocoupler.

[0021] The aforementioned AC mains single-pulse wake-up circuit, when connected to AC mains, operates as follows: When the AC mains is in its positive half-cycle, diode D1 can normally charge the bus capacitor C21 and supply power to the pulse width adjustment circuit, at which point the optocoupler is energized and outputs a pull-down level. When the AC mains is in its negative half-cycle, diode D1 is cut off, bus capacitor C21 discharges, and the optocoupler continues to be energized and outputs a pull-down level.

[0022] Meanwhile, capacitor C20 is constantly charging. When capacitor C20 is fully charged, the current can hardly flow through capacitor C20 anymore. No current flows through the input terminal of the optocoupler, the output terminal of the optocoupler is turned off, maintaining a high impedance state, and the output pulse ends.

[0023] The aforementioned AC mains single-pulse wake-up circuit, upon connection to AC mains, begins outputting a continuous pulse signal from its isolated output circuit. Simultaneously, capacitor C20 in the pulse width adjustment circuit continuously charges. Once capacitor C20 is fully charged, the isolated output circuit stops outputting the pulse signal due to the lack of power. The pulse signal width is determined by the charging time of capacitor C20. Therefore, the wake-up circuit outputs a single-pulse wake-up signal. Once the pulse signal stops, the entire wake-up circuit ceases operation unless disconnected from and reconnected to the mains power. This reduces energy loss.

[0024] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. An AC mains single-pulse wake-up circuit, characterized in that: When the circuit is connected to mains power, the circuit outputs one and only one pulse wake-up signal; The circuit includes a rectifier energy storage circuit, a pulse width adjustment circuit, and an isolation output circuit; The rectifier energy storage circuit charges the bus capacitor C21 and supplies power to the pulse width adjustment circuit when the mains power is in the positive half-cycle. When the mains power is in the negative half-cycle, the rectifier energy storage circuit discharges through the bus capacitor C21 to supply power to the pulse width adjustment circuit. The pulse width adjustment circuit is equipped with a capacitor C20. When the capacitor C20 is not fully charged, current flows through the input terminal of the isolation output circuit, and the output terminal of the isolation output circuit outputs a pulse signal. When the capacitor C20 is fully charged, no current flows through the input terminal of the isolation output circuit, and the output terminal of the isolation output circuit stops outputting pulse signals.

2. The AC mains single-pulse wake-up circuit according to claim 1, characterized in that: The rectifier energy storage circuit includes a diode D1 and a bus capacitor C21. The anode of the diode D1 is connected to the live wire of the AC mains, and the cathode is connected to one end of the bus capacitor C21 and the pulse width adjustment circuit. The other end of the bus capacitor C21 is connected to the neutral wire of the AC mains.

3. The AC mains single-pulse wake-up circuit according to claim 2, characterized in that: The capacitor C20 is connected between the cathode of diode D1 and the isolation output circuit.

4. The AC mains single-pulse wake-up circuit according to claim 3, characterized in that: The isolated output circuit is an optocoupler.

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