Wifi slow start circuit for household energy storage
By designing a wifi slow start circuit for household energy storage, the MOS tube and diode combination control the opening and closing of the MOS tube, the problem of excessive instantaneous power consumption during slow start of the MOS tube is solved, and the normal and stable operation of the system is achieved.
Patent Information
- Application Number
- CN202420633360.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-29
AI Technical Summary
During slow startup, the instantaneous power consumption of the MOS tube is too high, resulting in system instability and may even cause circuit board or electronic components to burn.
A wifi slow start circuit for household energy storage is designed. Through the cooperation of MOS tube 1 and MOS tube 2, the diodes and resistors are installed in parallel to control the opening and closing of the MOS tube, and the Vgs voltage of MOS tube 2 is slowly reduced to avoid instantaneous high power consumption.
It effectively solves the problem of excessive instantaneous power consumption during slow start of MOS tube, ensures the normal and stable operation of the system, and avoids line instability and component damage.
Smart Images
Figure CN222602273U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a slow start circuit, in particular to a WiFi slow start circuit for household energy storage. Background Art
[0002] With the promotion of the concept of green energy conservation, energy storage batteries have become a new force in the development of the new energy industry. As the core link of the battery system, the battery management system (BMS) is playing an increasingly important role in the field of power and energy storage batteries. BMS is the link between the battery and the user. Its functions include: battery physical parameter monitoring, battery status estimation, online diagnosis and early warning, charge and discharge control, and thermal management. Its main purpose is to improve the utilization rate of the battery, prevent the battery from overcharging and over-discharging, extend the battery life, and monitor the battery status.
[0003] In order to extend the standby time of energy storage products used by users, BMS needs to turn off the WiFi peripherals to reduce power consumption. When BMS is working normally, the WiFi function must be turned on. In the initial power-on period, the capacitor is short-circuited and the load is heavy (1w). A huge surge current will be generated in the input circuit, which will have a great impact on the power supply and power circuits, causing instability in the electronic circuits and reducing the reliability of the circuits. In severe cases, it may even cause the circuit boards or electronic components to burn out. Therefore, a WiFi soft start circuit must be added to the electronic circuit to ensure the stability of the BMS circuit board. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a wifi slow-start circuit for household energy storage, which can solve the problem of excessive instantaneous power consumption of MOS tubes during slow-start and help ensure the normal operation of the system, in view of the shortcomings of the existing technology.
[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions. The utility model is a wifi slow start circuit for household energy storage, including MOS tube 1 and MOS tube 2, the G pin of MOS tube 1 is connected with a diode D47 and a resistor R233 arranged in parallel, one end of the resistor R233 is connected to the positive electrode of the diode and is set as an input end for externally connecting a 3.3V high-level control signal, the other end of the resistor R233 is connected to the negative electrode of the diode and connected to the G pin of MOS tube 1, and a resistor R234 is also connected between the point where the resistor R233 and the negative electrode of the diode meet and the G pin of MOS tube 1, the other end of the resistor R234 is grounded, and the S pin of MOS tube 1 is grounded;
[0006] The D pin of MOS tube 2 is set as the output end, which is used to output a 3.3V voltage signal to an external wifi peripheral. The G pin of MOS tube 2 is connected to the D pin of MOS tube 1 through resistor R300. The S pin of MOS tube 2 is externally connected to a 3.3v system power supply. A resistor R228 is also connected between the S pin of MOS tube 2 and the D pin of MOS tube 1. A capacitor C198 is also connected between the S pin of MOS tube 2 and the G pin of MOS tube 2.
[0007] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the above-mentioned household energy storage wifi slow start circuit, the connection point between the S pin of the MOS tube 2 and the 3.3v system power supply is grounded through the capacitor C172.
[0008] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. For the above-mentioned WiFi slow-start circuit for household energy storage, the capacitance of the capacitor C172 is 22 μF.
[0009] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. For the above-mentioned WiFi slow-start circuit for household energy storage, the reverse voltage of the diode D47 is 75V and the average rectified current is 0.15A.
[0010] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. For the above-mentioned WiFi slow-start circuit for household energy storage, the resistance value of the resistor R233 is 1KΩ, and the resistance value of the resistor R234 is 10KΩ.
[0011] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. For the above-mentioned WiFi slow-start circuit for household energy storage, the resistance value of the resistor R300 is 1KΩ, and the resistance value of the resistor R228 is 300KΩ.
[0012] The technical problem to be solved by the present invention can be further achieved through the following technical solutions. For the above-mentioned WiFi slow-start circuit for household energy storage, the capacitance of the capacitor C198 is 100nF.
[0013] Compared with the prior art, the WiFi slow-start circuit for household energy storage provided by the utility model can be used for startup control in the process of the system power supply supplying power to the WiFi load, solving the problem of excessive instantaneous power consumption of the MOS tube during slow start, and ensuring the normal and stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a circuit schematic diagram. DETAILED DESCRIPTION
[0015] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] Reference Figure 1 , a WiFi slow start circuit for household energy storage, used for starting control in the process of system power supplying power to WiFi load, to solve the problem of excessive instantaneous power consumption of MOS tube during slow start, and ensure the normal operation of the system;
[0017] Specifically, the circuit includes a MOS tube 1 and a MOS tube 2, a G pin of the MOS tube 1 is connected to a diode D47 and a resistor R233 arranged in parallel, one end of the resistor R233 is connected to the positive electrode of the diode and is set as an input end for externally connecting a 3.3V high-level control signal, the other end of the resistor R233 is connected to the negative electrode of the diode and is connected to the G pin of the MOS tube 1, a resistor R234 is further connected between the connection point between the resistor R233 and the negative electrode of the diode and the G pin of the MOS tube 1, the other end of the resistor R234 is grounded, and the S pin of the MOS tube 1 is grounded;
[0018] The D pin of MOS tube 2 is set as an output end, which is used to output a 3.3V voltage signal to an external wifi peripheral. The G pin of MOS tube 2 is connected to the D pin of MOS tube 1 through a resistor R300. The S pin of MOS tube 2 is externally connected to a 3.3V system power supply. A resistor R228 is also connected between the S pin of MOS tube 2 and the D pin of MOS tube 1. A capacitor C198 is also connected between the S pin of MOS tube 2 and the G pin of MOS tube 2.
[0019] In order to filter the interference signal in the power supply and improve the stability and reliability of the circuit, the connection point between the S pin of MOS tube 2 and the 3.3V system power supply is grounded through capacitor C172.
[0020] In actual application, the capacitance of the capacitor C172 is 22μF; the reverse voltage of the diode D47 is 75V, and the average rectified current is 0.15A; the resistance value of the resistor R233 is 1KΩ, and the resistance value of the resistor R234 is 10KΩ; the resistance value of the resistor R300 is 1KΩ, and the resistance value of the resistor R228 is 300KΩ; the capacitance of the capacitor C198 is 100nF.
[0021] The working principle of this application is: the input end is connected to the output end of the MCU control unit, and the output end is connected to the startup control end of the wifi peripheral. When the wifi function needs to be turned on, the MCU control unit outputs a 3.3v high-level control signal, the G pin of MOS tube 1 is high level, and the Vgs voltage of MOS tube 1 is equal to 3.3v. At this time, MOS tube 1 is turned on, and the 3.3V system power supply charges capacitor C198. The G pin voltage of MOS tube 2 slowly decreases. When the Vgs voltage of MOS tube 2 is less than -1v, MOS tube 2 slowly turns on to charge the startup control end of the subsequent wifi peripheral. As the Vgs voltage of MOS tube 2 decreases and reaches the maximum value, MOS tube 2 is also fully turned on to ensure the normal operation of the system.
Claims
1. A WiFi slow start circuit for household energy storage, characterized in that: It comprises a MOS tube 1 and a MOS tube 2, wherein a diode D47 and a resistor R233 arranged in parallel are connected to a G pin of the MOS tube 1, one end of the resistor R233 is connected to the positive electrode of the diode and is set as an input end for externally connecting a 3.3V high-level control signal, the other end of the resistor R233 is connected to the negative electrode of the diode and is connected to the G pin of the MOS tube 1, a resistor R234 is further connected between the connection point between the resistor R233 and the negative electrode of the diode and the G pin of the MOS tube 1, the other end of the resistor R234 is grounded, and the S pin of the MOS tube 1 is grounded; The D pin of MOS tube 2 is set as the output end, which is used to output a 3.3V voltage signal to an external wifi peripheral. The G pin of MOS tube 2 is connected to the D pin of MOS tube 1 through resistor R300. The S pin of MOS tube 2 is externally connected to a 3.3v system power supply. A resistor R228 is also connected between the S pin of MOS tube 2 and the D pin of MOS tube 1. A capacitor C198 is also connected between the S pin of MOS tube 2 and the G pin of MOS tube 2.
2. The WiFi slow-start circuit for household energy storage according to claim 1 is characterized in that: The connection point between the S pin of MOS tube 2 and the 3.3V system power supply is grounded through capacitor C172.
3. The WiFi slow-start circuit for household energy storage according to claim 2 is characterized in that: The capacitance of the capacitor C172 is 22 μF.
4. The WiFi slow-start circuit for household energy storage according to claim 1 is characterized in that: The reverse voltage of the diode D47 is 75V, and the average rectified current is 0.15A.
5. The WiFi slow-start circuit for household energy storage according to claim 1 is characterized in that: The resistance value of the resistor R233 is 1KΩ, and the resistance value of the resistor R234 is 10KΩ.
6. The WiFi slow start circuit for household energy storage according to claim 1 or 5, characterized in that: The resistance value of the resistor R300 is 1KΩ, and the resistance value of the resistor R228 is 300KΩ.
7. The WiFi slow-start circuit for household energy storage according to claim 6 is characterized in that: The capacitance of the capacitor C198 is 100nF.