A bidirectional energy storage power supply control circuit

Abstract

The present invention relates to the field of energy storage, and provides a bidirectional energy storage power supply control circuit, comprising a main control module, a bidirectional inverter module, a drive module and an AC waveform detection circuit, wherein the input end of the drive module is connected to the main control module, and the output end is connected to the controlled end of the bidirectional inverter module. When an external AC power supply charges the energy storage battery, the bidirectional inverter module rectifies the external AC power supply. When the external AC power supply disappears, the bidirectional inverter module inverts the DC power generated by the energy storage battery. The AC waveform detection circuit is connected to the main control module and is used for transmitting the waveform information of the external AC power supply during charging or the inverter output waveform information during inversion to the main control module. The present invention can perform rectification and power supply when storing energy for an energy storage device, and perform inverter output when connected to the grid. The circuit structure is simple and bidirectional output is realized.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to a bidirectional energy storage power supply control circuit. Background Art

[0002] With the development of science and technology, the application of backup energy storage power supplies is becoming more and more extensive. Most backup energy storage power supplies need to be charged when powered by an external AC power supply. When the external AC power supply disappears, they are connected to the grid to power the equipment. Since the energy storage battery is a DC power supply, when charging, the external AC power supply needs to be rectified by a rectifier module before charging the energy storage battery. When connected to the grid, the DC power supply is converted into AC power for grid connection through an inverter device, and the rectifier module and the inverter module are switched in different states through switches such as relays. In this way, the energy storage power supply requires devices such as rectification, inversion and switching switches, and the circuit structure is relatively complex and occupies a large volume. Summary of the invention

[0003] The problem solved by the present invention is how to provide a bidirectional energy storage power supply control circuit which can perform rectification power supply when storing energy in an energy storage device and perform inversion output when connected to the grid.

[0004] In order to solve the above problems, the present invention provides a bidirectional energy storage power supply control circuit, comprising: a main control module, a bidirectional inverter module, a drive module and an AC waveform detection circuit, wherein the input end of the drive module is connected to the main control module, and the output end is connected to the controlled end of the bidirectional inverter module, so as to send a drive signal to the bidirectional inverter module according to the PWM control signal sent by the main control module, and change the working state of the bidirectional inverter module, one side of the bidirectional inverter module is connected to an external AC port, and the other side is connected to a DC port, and the DC port is connected to the energy storage battery, when the external AC power supply charges the energy storage battery, the bidirectional inverter module rectifies the external AC power supply, and when the external AC power supply disappears, the bidirectional inverter module inverts the DC power generated by the energy storage battery, and the AC waveform detection circuit is connected to the main control module, and is used to transmit the external AC power waveform information during charging or the inverter output waveform information during inversion to the main control module.

[0005] Furthermore, the bidirectional energy storage power supply control circuit also includes a first detection module and a second detection module connected to the main control module, the first detection module is used to transmit the detected power-on information of the external AC power supply to the main control module, and the second detection module is used to transmit the collected power information of the energy storage battery to the main control module.

[0006] Further, the bidirectional inverter module includes a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube. The main control module sends drive signals to the gates of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube respectively through the drive module. The drain of the first MOS tube is connected to the positive electrode of the DC port, and the source is connected to the neutral line of the AC power supply. The drain of the second MOS tube is connected to the source of the first MOS tube, and the source is connected to the negative electrode of the DC port, which is the common reference ground. The drain of the third MOS tube is connected to the positive electrode of the DC port, and the source is connected to the live line of the AC power supply. The drain of the fourth MOS tube is connected to the source of the third MOS tube, and the source is connected to the negative electrode of the DC port.

[0007] Furthermore, the bidirectional inverter module also includes a first inductor and a first capacitor, the first inductor is connected in series in the live wire of the AC power supply, and the first capacitor is arranged between the live wire and the neutral wire of the AC power supply.

[0008] Furthermore, the driving module includes a first driving circuit and a second driving circuit with the same structure, the first driving circuit is used to drive the first MOS transistor and the second MOS transistor, and the second driving circuit is used to drive the third MOS transistor and the fourth MOS transistor.

[0009] Furthermore, the first drive circuit includes a first driver, a first drive signal processing circuit and a second drive signal processing circuit, the input end of the first driver is connected to the main control module, the two output ends of the first driver with opposite level signals are respectively connected to the input ends of the first drive signal processing circuit and the second drive signal processing circuit, the output end of the first drive signal processing circuit is connected to the first MOS tube, and the output end of the first drive signal processing circuit is connected to the second MOS tube.

[0010] Furthermore, the first drive signal processing circuit includes a first transistor, a second transistor, a first filtering circuit and a negative voltage shutdown circuit, the bases of the first transistor and the second transistor are connected to the output end of the first driver, the collector of the first transistor is connected to the power supply via the first filtering circuit, the emitter is connected to the gate of the first MOS tube via the negative voltage shutdown circuit, the collector of the second transistor is connected to the emitter of the first transistor, and the emitter is connected to the source of the first MOS tube.

[0011] Furthermore, the AC waveform detection circuit includes an upper waveform detection circuit and a lower waveform detection circuit connected to the main control module, the upper waveform detection circuit is used to detect the upper half cycle sinusoidal wave information of the AC power supply and transmit it to the main control module, and the lower waveform detection circuit is used to detect the lower half cycle sinusoidal wave information of the AC power supply and transmit it to the main control module.

[0012] Furthermore, the upper waveform detection circuit includes a first differential amplifier circuit, a second differential amplifier circuit and a first TVS tube, the positive and negative input terminals of the first differential amplifier circuit are respectively connected to the live wire and the neutral wire of the AC power supply, the output terminal is connected to the positive input terminal of the second differential amplifier circuit, the negative input terminal of the second differential amplifier circuit is connected to the common reference ground, and the output terminal is connected to the main control module via the first TVS tube.

[0013] Furthermore, the lower waveform detection circuit includes a third differential amplifier circuit, a fourth differential amplifier circuit and a second TVS tube, the positive and negative input terminals of the third differential amplifier circuit are respectively connected to the live wire and the neutral wire of the AC power supply, the output terminal is connected to the negative input terminal of the fourth differential amplifier circuit, the positive input terminal of the fourth differential amplifier circuit is connected to the common reference ground, and the output terminal is connected to the main control module via the first TVS tube.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] When the energy storage device adopts this circuit, the external AC power supply is connected through the external AC port during charging, the main control module detects the state of the external AC power supply, confirms that the external power supply is connected, and starts charging. The main control module sends a control signal to the drive module, and the drive module drives the bidirectional inverter module to put the bidirectional inverter module in a rectification state, rectifies the external input AC power and outputs it to the energy storage battery inside the energy storage device through the output DC port. When the external power supply fails and the energy storage device needs to power the external equipment, the main control module sends a control signal to the drive module to drive the bidirectional inverter module to put the bidirectional inverter module in a rectification state, inverts the DC voltage of the energy storage battery into AC power, and performs grid-connected power supply. At the same time, the AC waveform detection circuit can detect the AC waveform information, so that the rectification and inversion control are more precise, and the combination of bidirectional rectification and inversion is realized. Compared with separately setting the rectification, inversion and switching modules, the structure is simpler and the volume is smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall principle structure of an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the principle structure of a bidirectional inverter module according to an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of the principle structure of the first driving circuit according to an embodiment of the present invention;

[0019] Figure 4 It is a schematic diagram of the principle structure of the waveform detection circuit in an embodiment of the present invention;

[0020] Figure 5 The figure is a schematic diagram of the principle structure of the waveform detection circuit according to the embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. 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 the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0024] like Figure 1 As shown, the present invention provides a bidirectional energy storage power supply control circuit, comprising: a main control module, a bidirectional inverter module, a drive module and an AC waveform detection circuit, wherein the input end of the drive module is connected to the main control module, and the output end is connected to the controlled end of the bidirectional inverter module, so as to send a drive signal to the bidirectional inverter module according to the PWM control signal sent by the main control module, and change the working state of the bidirectional inverter module, one side of the bidirectional inverter module is connected to an external AC port, and the other side is connected to a DC port, and the DC port is connected to the energy storage battery, when the external AC power supply charges the energy storage battery, the bidirectional inverter module rectifies the external AC power supply, and when the external AC power supply disappears, the bidirectional inverter module inverts the DC power generated by the energy storage battery, and the AC waveform detection circuit is connected to the main control module, and is used to transmit the external AC power waveform information during charging or the inverter output waveform information during inversion to the main control module.

[0025] It should be noted that if Figure 1As shown, when charging, the energy storage device using this circuit is connected through the external AC port, the main control module detects the state of the external AC power supply, confirms that the external power supply is connected, and starts charging. The main control module sends a control signal to the drive module, and the drive module drives the bidirectional inverter module to put the bidirectional inverter module in a rectification state, and outputs the external input AC power to the energy storage battery inside the energy storage device through the output DC port after rectification. When the external power supply fails and the energy storage device is required to power the external device, the main control module sends a control signal to the drive module to drive the bidirectional inverter module to put the bidirectional inverter module in a rectification state, and invert the DC voltage of the energy storage battery into an AC power supply for grid-connected power supply. At the same time, the AC waveform detection circuit can detect the AC waveform information, so that the rectification and inversion control are more precise, and the combination of bidirectional rectification and inversion is realized. Compared with separately setting the rectification, inversion and switching modules, the structure is simpler and the volume is smaller.

[0026] In one embodiment of the present invention, the bidirectional energy storage power supply control circuit also includes a first detection module and a second detection module connected to the main control module, the first detection module is used to transmit the detected power-on information of the external AC power supply to the main control module, and the second detection module is used to transmit the collected power information of the energy storage battery to the main control module.

[0027] It should be noted that the first detection module is used to transmit the detected power-on information of the external AC power supply to the main control module. When in use, when the main control module detects that the external AC power supply is lost, it will change the mode and switch the rectification mode of the external AC to the inverter mode of the DC power supply of the energy storage battery to power the external device; the second detection module is used to transmit the collected power information of the energy storage battery to the main control module. In the charging mode, the main control module can confirm the state control of the bidirectional inverter module according to the battery power information. When the battery is fully charged, the main control module can stop controlling the output, so that the bidirectional inverter module and the drive module are in standby state to save energy. When the battery power is lower than the set threshold, such as below 70%, charging starts to maintain the power supply capacity of the energy storage battery.

[0028] In one embodiment of the present invention, the bidirectional inverter module includes a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, the main control module sends a driving signal to the gates of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube respectively through the driving module, the drain of the first MOS tube is connected to the positive electrode of the DC port, and the source is connected to the neutral line of the AC power supply, the drain of the second MOS tube is connected to the source of the first MOS tube, and the source is connected to the negative electrode of the DC port, the negative electrode of the DC port is the common reference ground, the drain of the third MOS tube is connected to the positive electrode of the DC port, and the source is connected to the live line of the AC power supply, the drain of the fourth MOS tube is connected to the source of the third MOS tube, and the source is connected to the negative electrode of the DC port.

[0029] It should be noted that if Figure 3 As shown, in the charging mode, the bidirectional inverter module is used to rectify the external input AC power supply. At this time, in the positive half cycle of the AC power, the main control module controls the second MOS tube Q2 and the third MOS tube Q3 to be turned on through the driving module, the live wire is connected to the positive pole of the DC port through the third MOS tube Q3, and the neutral wire is connected to the negative pole of the DC port through the second MOS tube Q2. In the negative half cycle of the AC power, the main control module controls the first MOS tube Q1 and the fourth MOS tube Q4 to be turned on through the driving module, the neutral wire is connected to the positive pole of the DC port through the first MOS tube Q1, and the live wire is turned on. The negative electrode of the DC port is connected through the fourth MOS tube Q4, so that the positive voltage of the AC in the entire sine wave cycle is always output to the positive electrode of the DC port to achieve rectification; in the inverter mode, when the second MOS tube Q2 and the third MOS tube Q3 are turned on, the live wire for external output is connected to the positive electrode, and the neutral wire is connected to the negative electrode. When the first MOS tube Q1 and the fourth MOS tube Q4 are turned on, the neutral wire for external output is connected to the positive electrode, and the live wire is connected to the negative electrode. By switching the output polarity cyclically, the DC voltage of the energy storage battery is converted into an external AC output to achieve inversion.

[0030] In one embodiment of the present invention, the bidirectional inverter module further includes a first inductor and a first capacitor, wherein the first inductor is connected in series in the live wire of the AC power supply, and the first capacitor is arranged between the live wire and the neutral wire of the AC power supply.

[0031] It should be noted that if Figure 2 As shown, during the rectification process, the first inductor L3 and the first capacitor C1 can be used as energy storage to boost the DC output. During the inversion process, the first inductor L3 and the first capacitor C1 are connected in series in the inverter output circuit to resonate, which can make the output waveform smoother and closer to a sine wave.

[0032] In one embodiment of the present invention, the driving module includes a first driving circuit and a second driving circuit with the same structure, the first driving circuit is used to drive the first MOS transistor and the second MOS transistor, and the second driving circuit is used to drive the third MOS transistor and the fourth MOS transistor.

[0033] It should be noted that, since only one of the two groups of MOS tubes, namely, the first MOS tube Q1 and the second MOS tube Q2, and the third MOS tube Q3 and the fourth MOS tube Q4, needs to be turned on at the same time, in this embodiment, two drive circuits are used to receive the main control module signals respectively, so as to realize the separate control of the above four MOS tubes. According to the PWM signal of the main control module, the switching frequency and duration of the four MOS tubes can be adjusted to control the DC output voltage of the energy storage battery in the rectification and boosting state, and to control the frequency of the output AC power in the inverter state.

[0034] In one embodiment of the present invention, the first driving circuit includes a first driver, a first driving signal processing circuit and a second driving signal processing circuit, the input end of the first driver is connected to the main control module, two output ends of the first driver with opposite level signals are respectively connected to the input ends of the first driving signal processing circuit and the second driving signal processing circuit, the output end of the first driving signal processing circuit is connected to the first MOS tube, and the output end of the first driving signal processing circuit is connected to the second MOS tube.

[0035] It should be noted that the first drive circuit and the second drive circuit have the same structure and control principle. Take the control of the first MOS transistor Q1 and the second MOS transistor Q2 by the first drive circuit as an example. Figure 3 As shown, chip U8 is used as the first driver, and its model is FAN391. Ports 1 and 2 of the first driver are input ports for receiving signals from the main control module, and ports 6 and 12 are gate drive output terminals with opposite levels. In this way, opposite signals are output to the first MOS tube Q1 and the second MOS tube Q2, so that the first MOS tube Q1 and the second MOS tube Q2 will not be turned on at the same time, thereby preventing short circuit and protecting the overall circuit.

[0036] In one embodiment of the present invention, the first drive signal processing circuit includes a first transistor, a second transistor, a first filter circuit and a negative voltage shutdown circuit, the bases of the first transistor and the second transistor are connected to the output end of the first driver, the collector of the first transistor is connected to the power supply via the first filter circuit, the emitter is connected to the gate of the first MOS tube via the negative voltage shutdown circuit, the collector of the second transistor is connected to the emitter of the first transistor, and the emitter is connected to the source of the first MOS tube.

[0037] It should be noted that the first drive signal processing circuit and the second drive signal processing circuit have the same structure and control principle. Taking the first drive signal processing circuit as an example, Figure 3 As shown, the first transistor Q12 and the second transistor Q13 form a totem pole circuit. After isolating and amplifying the driving signal, a voltage difference is generated between the gate and the emitter of the first MOS tube Q1, and the first MOS tube Q1 is driven. The first filter circuit uses a diode D22 and a capacitor C105 to form a CD filter circuit to ensure the stability of the totem pole circuit power supply, thereby ensuring the accuracy of the drive. The negative voltage shutdown circuit includes a voltage regulator tube D18 and a capacitor C106. Because the switch tube is turned off with a negative voltage, the voltage regulator tube D18 can generate a negative voltage of 3 volts when the first MOS tube Q1 is turned off, so as to prevent the power device from being damaged when it is turned off.

[0038] In one embodiment of the present invention, the AC waveform detection circuit includes an upper waveform detection circuit and a lower waveform detection circuit connected to the main control module, the upper waveform detection circuit is used to detect the upper half cycle sine wave information of the AC power supply and transmit it to the main control module, and the lower waveform detection circuit is used to detect the lower half cycle sine wave information of the AC power supply and transmit it to the main control module.

[0039] It should be noted that the main control module can obtain the sinusoidal wave information of the upper and lower half cycles of the AC power supply through the AC waveform detection circuit. During rectification, by obtaining the waveform of the input AC power supply, the main control module controls the four MOS tubes to switch accurately at the zero point of the positive and negative half cycles, so as to achieve precise adjustment of THDI and make the current harmonics less than four percent; during inversion, by obtaining the waveform of the output AC power supply, the main control module controls the switching of the four MOS tubes, and can accurately control the frequency and waveform of the output AC power supply.

[0040] In one embodiment of the present invention, the upper waveform detection circuit includes a first differential amplifier circuit, a second differential amplifier circuit and a first TVS tube, the positive and negative input terminals of the first differential amplifier circuit are respectively connected to the live wire and the neutral wire of the AC power supply, the output terminal is connected to the positive input terminal of the second differential amplifier circuit, the negative input terminal of the second differential amplifier circuit is connected to the common reference ground, and the output terminal is connected to the main control module via the first TVS tube.

[0041] It should be noted that since the main control module uses a single-chip microcomputer chip, the voltage input port of the single-chip microcomputer can only recognize positive voltage and cannot recognize negative voltage. Therefore, two detection circuits are used to detect the upper and lower half-cycle waveforms respectively, such as Figure 4As shown, resistors R170, R246 and comparison amplifier U30A form a first differential amplifier circuit. In the first differential amplifier circuit, the output voltage is compared by the live wire and the neutral wire. By obtaining the voltage difference value, the sinusoidal waveform point at this time can be obtained to realize waveform detection. Resistors R172, R199, R176 and comparison amplifier U30B form a second differential amplifier circuit. In the first differential amplifier circuit, the voltage detection value is compared with the common reference ground, that is, compared with the zero point voltage. In the first half of the AC sine wave, the voltage detection value is a positive voltage, and a positive voltage is output by comparing with the common reference ground. After amplification, it will be received by the main control module. In the second half of the AC sine wave, the output negative voltage will not be recognized by the main control module. The amplified detection signal is limited and translated by the first TVS tube D20 and then transmitted to the CPU.

[0042] In one embodiment of the present invention, the lower waveform detection circuit includes a third differential amplifier circuit, a fourth differential amplifier circuit and a second TVS tube, the positive and negative input terminals of the third differential amplifier circuit are respectively connected to the live wire and the neutral wire of the AC power supply, the output terminal is connected to the negative input terminal of the fourth differential amplifier circuit, the positive input terminal of the fourth differential amplifier circuit is connected to the common reference ground, and the output terminal is connected to the main control module via the first TVS tube.

[0043] It should be noted that if Figure 5 As shown, capacitors C163, C129, C169, resistors R206, R258 and comparison amplifier U35B form a third differential amplifier circuit. In the third differential amplifier circuit, the output voltage is compared by the live wire and the neutral wire, and the voltage difference value is obtained to realize waveform detection. Resistors R159, R258 and comparison amplifier U35A form a fourth differential amplifier circuit. In the fourth differential amplifier circuit, the voltage detection value is compared with the common reference ground, that is, compared with the zero point voltage. In the second half of the AC sine wave, the voltage detection value is a negative voltage. After the common reference ground is compared with the negative voltage, a positive voltage will be output in reverse. After amplification, it will be received by the main control module. In the first half of the AC sine wave, the negative voltage output in reverse by the fourth differential amplifier circuit will not be recognized by the main control module. Accordingly, the main control module can obtain waveform information through the upper waveform detection circuit in the first half of the AC waveform, and obtain waveform information through the lower waveform detection circuit in the second half of the AC waveform, so as to realize detection of the entire waveform.

[0044] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A bidirectional energy storage power supply control circuit, characterized in that: include: A main control module, a bidirectional inverter module, a drive module and an AC waveform detection circuit, wherein the input end of the drive module is connected to the main control module, and the output end is connected to the controlled end of the bidirectional inverter module, so as to send a drive signal to the bidirectional inverter module according to the PWM control signal sent by the main control module to change the working state of the bidirectional inverter module, one side of the bidirectional inverter module is connected to an external AC port, and the other side is connected to a DC port, and the DC port is connected to an energy storage battery. When the external AC power supply charges the energy storage battery, the bidirectional inverter module rectifies the external AC power supply, and when the external AC power supply disappears, the bidirectional inverter module inverts the DC power generated by the energy storage battery. The AC waveform detection circuit is connected to the main control module and is used to transmit the waveform information of the external AC power supply during charging or the inverter output waveform information during inversion to the main control module; the AC waveform detection circuit includes an upper waveform detection circuit and a lower waveform detection circuit connected to the main control module The upper waveform detection circuit is used to detect the sine wave information of the upper half cycle of the AC power supply and transmit it to the main control module, and the lower waveform detection circuit is used to detect the sine wave information of the lower half cycle of the AC power supply and transmit it to the main control module; the upper waveform detection circuit includes a first differential amplifier circuit, a second differential amplifier circuit and a first TVS tube, the positive and negative input terminals of the first differential amplifier circuit are respectively connected to the live wire and the neutral wire of the AC power supply, the output terminal is connected to the positive input terminal of the second differential amplifier circuit, the negative input terminal of the second differential amplifier circuit is connected to the common reference ground, and the output terminal is connected to the main control module via the first TVS tube; the lower waveform detection circuit includes a third differential amplifier circuit, a fourth differential amplifier circuit and a second TVS tube, the positive and negative input terminals of the third differential amplifier circuit are respectively connected to the live wire and the neutral wire of the AC power supply, the output terminal is connected to the negative input terminal of the fourth differential amplifier circuit, the positive input terminal of the fourth differential amplifier circuit is connected to the common reference ground, and the output terminal is connected to the main control module via the first TVS tube.

2. The bidirectional energy storage power supply control circuit according to claim 1, characterized in that: It also includes a first detection module and a second detection module connected to the main control module, the first detection module is used to transmit the detected power-on information of the external AC power supply to the main control module, and the second detection module is used to transmit the collected power information of the energy storage battery to the main control module.

3. The bidirectional energy storage power supply control circuit according to claim 2, characterized in that: The bidirectional inverter module includes a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube. The main control module sends a driving signal to the gates of the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube respectively through the driving module. The drain of the first MOS tube is connected to the positive electrode of the DC port, and the source is connected to the neutral line of the AC power supply. The drain of the second MOS tube is connected to the source of the first MOS tube, and the source is connected to the negative electrode of the DC port, which is the common reference ground. The drain of the third MOS tube is connected to the positive electrode of the DC port, and the source is connected to the live line of the AC power supply. The drain of the fourth MOS tube is connected to the source of the third MOS tube, and the source is connected to the negative electrode of the DC port.

4. The bidirectional energy storage power supply control circuit according to claim 3, characterized in that: The bidirectional inverter module further includes a first inductor and a first capacitor, wherein the first inductor is connected in series in the live wire of the AC power source, and the first capacitor is arranged between the live wire and the neutral wire of the AC power source.

5. The bidirectional energy storage power supply control circuit according to claim 4, characterized in that: The driving module comprises a first driving circuit and a second driving circuit with the same structure, wherein the first driving circuit is used to drive the first MOS transistor and the second MOS transistor, and the second driving circuit is used to drive the third MOS transistor and the fourth MOS transistor.

6. The bidirectional energy storage power supply control circuit according to claim 5, characterized in that: The first driving circuit includes a first driver, a first driving signal processing circuit and a second driving signal processing circuit. The input end of the first driver is connected to the main control module, and two output ends of the first driver with opposite level signals are respectively connected to the input ends of the first driving signal processing circuit and the second driving signal processing circuit. The output end of the first driving signal processing circuit is connected to the first MOS tube, and the output end of the first driving signal processing circuit is connected to the second MOS tube.

7. The bidirectional energy storage power supply control circuit according to claim 6, characterized in that: The first drive signal processing circuit includes a first transistor, a second transistor, a first filtering circuit and a negative voltage shutdown circuit. The bases of the first transistor and the second transistor are connected to the output end of the first driver, the collector of the first transistor is connected to the power supply via the first filtering circuit, the emitter is connected to the gate of the first MOS tube via the negative voltage shutdown circuit, the collector of the second transistor is connected to the emitter of the first transistor, and the emitter is connected to the source of the first MOS tube.

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