Inverter circuit of energy storage equipment

Abstract

The utility model discloses an inverter circuit of energy storage equipment, which relates to the technical field of energy storage equipment and comprises a main energy storage module used for supplying power; the inversion module is used for performing inversion processing and providing alternating-current electric energy for electric equipment connected with the output module; the working state detection module is used for detecting the working state of the main energy storage module and regularly controlling the auxiliary energy storage control module to store the residual electric energy of the inversion module after the main energy storage module stops working; the first detection module is used for performing low-voltage detection on the main energy storage module; the second detection module is used for carrying out voltage sampling, full charge detection and discharge detection on the auxiliary energy storage control module; and the electric energy adjusting module is used for performing electric energy superposition on the auxiliary energy storage control module and the main energy storage module when the main energy storage module is low in voltage and the auxiliary energy storage control module is fully charged. The inverter circuit of the energy storage device can absorb residual electric energy of the inverter module, control the auxiliary energy storage control module and the main energy storage module to carry out superposition power supply, and improve the power supply efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, in particular to an inverter circuit of energy storage equipment. Background Art

[0002] In order to provide AC power, energy storage devices generally use inverter circuits to invert the provided DC power. When the inverter circuit stops working, the energy storage device can receive and store the residual energy on the inverter circuit, thereby reducing and improving the safety of the circuit and performing energy-saving control. However, when the residual energy on the inverter circuit is small and the voltage of the energy storage device is large, the energy storage efficiency will be reduced. Moreover, if the energy storage device is in a low-voltage state during the period when the energy storage device supplies power to the inverter circuit, it will not be able to supply power normally. Therefore, there is room for improvement. Utility Model Content

[0003] The embodiments of the present invention provide an inverter circuit for an energy storage device to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] An inverter circuit of an energy storage device includes: a main energy storage module, an inverter module, an output module, a working state detection module, a secondary energy storage control module, a first detection module, a second detection module and an electric energy regulation module;

[0006] a main energy storage module, connected to the power regulation module, configured to provide a first electric energy, superimpose the first electric energy with the second electric energy provided by the auxiliary energy storage control module transmitted by the power regulation module, and output a third electric energy;

[0007] an inverter module, connected to the main energy storage module, configured to invert the first electric energy or the third electric energy and output AC electric energy;

[0008] an output module, connected to the inverter module, for transmitting AC power to a connected electrical device;

[0009] a working status detection module, connected to the main energy storage module, for detecting the working status of the main energy storage module and setting a timing time, and outputting a first control signal at a fixed time when the main energy storage module stops supplying power;

[0010] A secondary energy storage control module, connected to the working state detection module and the inverter module, configured to receive the first control signal and store the residual electric energy of the inverter module to provide the second electric energy;

[0011] a first detection module, connected to the main energy storage module, configured to perform voltage sampling on the first electric energy and set a low-voltage threshold, and output a first detection signal when the sampled signal is less than the low-voltage threshold;

[0012] a second detection module, connected to the auxiliary energy storage control module, for performing voltage sampling on the second electric energy, setting a full-charge threshold and a discharge threshold, outputting a second control signal when the sampling signal is greater than the full-charge threshold, and continuously controlling the output of the second detection signal when the sampled signal is greater than the discharge threshold;

[0013] The power regulation module is connected to the first detection module, the second detection module and the auxiliary energy storage control module, and is used to transmit the second power to the main energy storage module and superimpose the second power with the first power when receiving the first detection signal and the second detection signal.

[0014] As a further solution of the present invention: the main energy storage module includes a main energy storage device, a first capacitor and a first diode; the inverter module includes a first inverter; the output module includes an output interface;

[0015] Preferably, the first end of the main energy storage device is connected to the anode of the first diode and one end of the first capacitor, the cathode of the first diode is connected to the first input end of the first inverter, the second end of the main energy storage device is connected to the power regulation module, the second end of the first inverter and the other end of the first capacitor are both grounded, and the third end and the fourth end of the first inverter are respectively connected to the first end and the second end of the output interface.

[0016] As a further solution of the present invention: the working state detection module includes a third resistor, a fourth resistor, a fifth resistor, a second switch tube, a second capacitor, a sixth resistor, a first inverter and a first logic chip;

[0017] Preferably, one end of the third resistor is connected to the anode of the first diode and the collector of the second switching tube, the other end of the third resistor is connected to the base of the second switching tube and the input end of the first inverter and is connected to one end of the fifth resistor, one end of the second capacitor and the ground end through the fourth resistor, the emitter of the second switching tube is connected to the other end of the fifth resistor and the other end of the second capacitor and is connected to the A end of the first logic chip through the sixth resistor, the output end of the first inverter is connected to the B end of the first logic chip, and the Y end of the first logic chip is connected to the auxiliary energy storage control module.

[0018] As a further solution of the present utility model: the auxiliary energy storage control module includes a second diode, a second power tube and an auxiliary energy storage device;

[0019] Preferably, the anode of the second diode is connected to the cathode of the first diode, the cathode of the second diode is connected to the drain of the second power tube, the source of the second power tube is connected to the first end of the auxiliary energy storage device, the second detection module and the power regulation module, the second end of the auxiliary energy storage device is grounded, and the gate of the second power tube is connected to the Y end of the first logic chip.

[0020] As a further solution of the present invention: the second detection module includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first power supply, a first comparator, a third switch tube and an eleventh resistor;

[0021] Preferably, one end of the seventh resistor is connected to the first end of the auxiliary energy storage device, the other end of the seventh resistor is connected to the non-inverting end of the first comparator and is grounded through the eighth resistor, the inverting end of the first comparator is connected to the collector of the third switching tube and one end of the ninth resistor and is connected to the first power supply through the tenth resistor, the emitter of the third switching tube is connected to the other end of the ninth resistor and the ground through the eleventh resistor, and the base of the third switching tube is connected to the output end of the first comparator and the power regulation module.

[0022] As a further solution of the present invention: the power regulation module includes a second logic chip, a first power tube, a third power tube, a second resistor, a first resistor and a first switch tube;

[0023] Preferably, the A end of the second logic chip is connected to the output end of the first comparator, the Y end of the second logic chip is connected to the gate of the third power tube and is connected to the base of the first switching tube through the second resistor, the B end of the second logic chip is connected to the first detection module, the drain of the third power tube is connected to the first end of the auxiliary energy storage device, the source of the third power tube is connected to the second end of the main energy storage device and the drain of the first power tube, the gate of the first power tube is connected to the collector of the first switching tube and is connected to the first end of the main energy storage device through the first resistor, and the source of the first power tube and the emitter of the first switching tube are both connected to the second end of the auxiliary energy storage device.

[0024] As a further solution of the present invention: the first detection module includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a second comparator;

[0025] Preferably, one end of the twelfth resistor is connected to the first end of the main energy storage device and is connected to the in-phase end of the second comparator and one end of the fifteenth resistor through the fourteenth resistor, the inverting end of the second comparator is connected to the other end of the twelfth resistor and is connected to the second end of the main energy storage device and the other end of the fifteenth resistor through the thirteenth resistor, and the output end of the second comparator is connected to the B end of the second logic chip.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the inverter circuit of the energy storage device of the present invention can invert the electric energy output by the main energy storage module by the inverter module, detect the power supply status of the main energy storage module by the working status detection module, and control the auxiliary energy storage control module to absorb the residual electric energy of the inverter module when the main energy storage module stops supplying power, thereby improving the energy storage efficiency; and when the auxiliary energy storage control module is fully charged and the voltage of the main energy storage module is lower than the set low-voltage threshold, the auxiliary energy storage control module and the main energy storage module will be controlled by the power regulation module to perform superimposed power supply to meet the power demand of the inverter module and improve the power supply efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 The present invention provides a schematic block diagram of the principle of an inverter circuit for an energy storage device.

[0029] Figure 2 This is a circuit diagram of an inverter circuit of an energy storage device provided in an example of the present utility model.

[0030] Figure 3 This is a connection circuit diagram of the first detection module provided in this example of the utility model. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] In one embodiment, see Figure 1 , an inverter circuit of an energy storage device, comprising: a main energy storage module 1, an inverter module 2, an output module 3, a working state detection module 4, a secondary energy storage control module 5, a first detection module 6, a second detection module 7 and an electric energy regulation module 8;

[0033] Specifically, the main energy storage module 1 is connected to the power regulation module 8 and is used to provide a first electric energy, superimpose the first electric energy with the second electric energy provided by the auxiliary energy storage control module 5 transmitted by the power regulation module 8 and output a third electric energy;

[0034] an inverter module 2 connected to the main energy storage module 1 and configured to invert the first electric energy or the third electric energy and output AC electric energy;

[0035] An output module 3, connected to the inverter module 2, for transmitting AC power to connected electrical equipment;

[0036] A working state detection module 4 is connected to the main energy storage module 1 and is used to detect the working state of the main energy storage module 1 and set a timing time, and output a first control signal at a fixed time when the main energy storage module 1 stops supplying power;

[0037] A secondary energy storage control module 5, connected to the working state detection module 4 and the inverter module 2, for receiving the first control signal and storing the residual electric energy of the inverter module 2 to provide the second electric energy;

[0038] A first detection module 6, connected to the main energy storage module 1, is used to sample the voltage of the first electric energy and set a low-voltage threshold, and output a first detection signal when the sampled signal is less than the low-voltage threshold;

[0039] A second detection module 7 is connected to the auxiliary energy storage control module 5 and is used to perform voltage sampling on the second electric energy, set a full-charge threshold and a discharge threshold, output a second control signal when the sampling signal is greater than the full-charge threshold, and continuously control the output of the second detection signal when the sampled signal is greater than the discharge threshold;

[0040] The power regulation module 8 is connected to the first detection module 6, the second detection module 7 and the auxiliary energy storage control module 5, and is used to transmit the second power to the main energy storage module 1 and superimpose the second power with the first power when receiving the first detection signal and the second detection signal.

[0041] In a specific embodiment, the main energy storage module 1 can adopt a main energy storage circuit composed of a main energy storage device and a diode to provide DC power; the inverter module 2 can adopt an inverter circuit composed of an inverter to invert the input power; the output module 3 can adopt an output circuit composed of an output interface to transmit the input power to the receiving power-consuming device; the working state detection module 4 can adopt a working state detection circuit composed of a resistor, a transistor, a logic chip, an inverter, etc., which can detect the power supply status of the main energy storage module 1, set the timing time, and after the main energy storage module 1 stops supplying power, time the energy storage work of the auxiliary energy storage control module 5; the auxiliary energy storage control module 5 can adopt a field effect tube, a diode, etc. The auxiliary energy storage control circuit composed of the auxiliary energy storage device can absorb the residual electric energy on the inverter module 2 and provide DC power; the above-mentioned first detection module 6 can adopt a first detection circuit composed of a resistor and a comparator, can perform power sampling, set a low-voltage threshold, and perform low-voltage judgment on the main energy storage control module; the above-mentioned second detection module 7 can adopt a second detection circuit composed of a resistor, a transistor, a comparator, etc., can perform power sampling, set a full-charge threshold and a discharge threshold, and compare the sampling signal with the voltage of the full-charge threshold and the discharge threshold respectively; the above-mentioned power regulation module 8 can adopt a power regulation circuit composed of a field-effect transistor, a resistor and a transistor, which can control the main energy storage module 1 and the auxiliary energy storage control module 5 to superimpose power.

[0042] In another embodiment, see Figure 1 、 Figure 2 and Figure 3 The main energy storage module 1 includes a main energy storage device, a first capacitor C1 and a first diode D1; the inverter module 2 includes a first inverter T1; the output module 3 includes an output interface;

[0043] Specifically, the first end of the main energy storage device is connected to the anode of the first diode D1 and one end of the first capacitor C1, the cathode of the first diode D1 is connected to the first input end of the first inverter T1, the second end of the main energy storage device is connected to the power regulation module 8, the second end of the first inverter T1 and the other end of the first capacitor C1 are both grounded, and the third end and the fourth end of the first inverter T1 are respectively connected to the first end and the second end of the output interface.

[0044] In a specific embodiment, the main energy storage device may be a battery; the first inverter T1 may be composed of four groups of IGBTs to perform single-phase inversion.

[0045] Furthermore, the working state detection module 4 includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a second switch tube V2, a second capacitor C2, a sixth resistor R6, a first inverter J3 and a first logic chip J1;

[0046] Specifically, one end of the third resistor R3 is connected to the anode of the first diode D1 and the collector of the second switching tube V2, the other end of the third resistor R3 is connected to the base of the second switching tube V2 and the input end of the first inverter J3, and is connected to one end of the fifth resistor R5, one end of the second capacitor C2 and the ground end through the fourth resistor R4, the emitter of the second switching tube V2 is connected to the other end of the fifth resistor R5 and the other end of the second capacitor C2, and is connected to the A end of the first logic chip J1 through the sixth resistor R6, the output end of the first inverter J3 is connected to the B end of the first logic chip J1, and the Y end of the first logic chip J1 is connected to the auxiliary energy storage control module 5.

[0047] In a specific embodiment, the second switch tube V2 can be an NPN transistor, the second electric energy can be a storage capacitor, and the timing time can be set in conjunction with the fifth resistor R5 and the sixth resistor R6; the first inverter J3 can be a NOT gate chip; the first logic chip J1 can be an AND gate chip.

[0048] Furthermore, the auxiliary energy storage control module 5 includes a second diode D2, a second power tube Q2 and an auxiliary energy storage device;

[0049] Specifically, the anode of the second diode D2 is connected to the cathode of the first diode D1, the cathode of the second diode D2 is connected to the drain of the second power tube Q2, the source of the second power tube Q2 is connected to the first end of the auxiliary energy storage device, the second detection module 7 and the power regulation module 8, the second end of the auxiliary energy storage device is grounded, and the gate of the second power tube Q2 is connected to the Y end of the first logic chip J1.

[0050] In a specific embodiment, the auxiliary energy storage device may be a supercapacitor; and the second power tube Q2 may be an N-channel field effect tube.

[0051] Furthermore, the second detection module 7 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first power supply VCC1, a first comparator A1, a third switch V3 and an eleventh resistor R11;

[0052] Specifically, one end of the seventh resistor R7 is connected to the first end of the secondary energy storage device, the other end of the seventh resistor R7 is connected to the non-inverting end of the first comparator A1 and is grounded through the eighth resistor R8, the inverting end of the first comparator A1 is connected to the collector of the third switching tube V3 and one end of the ninth resistor R9 and is connected to the first power supply VCC1 through the tenth resistor R10, the emitter of the third switching tube V3 is connected to the other end of the ninth resistor R9 and the ground through the eleventh resistor R11, and the base of the third switching tube V3 is connected to the output end of the first comparator A1 and the power regulation module 8.

[0053] In a specific embodiment, the seventh resistor R7 and the eighth resistor R8 perform power sampling; the tenth resistor R10, the ninth resistor R9 and the first power supply VCC1 set the full power threshold; the third switch tube V3 can be an NPN transistor, which cooperates with the tenth resistor R10, the ninth resistor R9, the first power supply VCC1 and the eleventh resistor R11 to set the discharge threshold; the first comparator A1 can be an LM358 comparator.

[0054] Furthermore, the power regulation module 8 includes a second logic chip J2, a first power tube Q1, a third power tube Q3, a second resistor R2, a first resistor R1 and a first switch tube V1;

[0055] Specifically, the A terminal of the second logic chip J2 is connected to the output terminal of the first comparator A1, the Y terminal of the second logic chip J2 is connected to the gate of the third power tube Q3 and is connected to the base of the first switching tube V1 through the second resistor R2, the B terminal of the second logic chip J2 is connected to the first detection module 6, the drain of the third power tube Q3 is connected to the first terminal of the auxiliary energy storage device, the source of the third power tube Q3 is connected to the second terminal of the main energy storage device and the drain of the first power tube Q1, the gate of the first power tube Q1 is connected to the collector of the first switching tube V1 and is connected to the first terminal of the main energy storage device through the first resistor R1, and the source of the first power tube Q1 and the emitter of the first switching tube V1 are both connected to the second terminal of the auxiliary energy storage device.

[0056] In a specific embodiment, the second logic chip J2 can be an AND gate chip; the first power tube Q1 and the third power tube Q3 can be N-channel field effect tubes; and the first switch tube V1 can be an NPN transistor.

[0057] Furthermore, the first detection module 6 includes a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15 and a second comparator A2;

[0058] Specifically, one end of the twelfth resistor R12 is connected to the first end of the main energy storage device and is connected to the non-inverting end of the second comparator A2 and one end of the fifteenth resistor R15 through the fourteenth resistor R14. The inverting end of the second comparator A2 is connected to the other end of the twelfth resistor R12 and is connected to the second end of the main energy storage device and the other end of the fifteenth resistor R15 through the thirteenth resistor R13. The output end of the second comparator A2 is connected to the B end of the second logic chip J2.

[0059] In a specific embodiment, the twelfth resistor R12 and the thirteenth resistor R13 sample the power of the main energy storage device; the fourteenth resistor R14 and the fifteenth resistor R15 set the low voltage threshold; and the second comparator A2 can be an LM358 comparator.

[0060] In an inverter circuit of an energy storage device according to this embodiment, a main energy storage device discharges, and the output electric energy is transmitted through a first diode D1. A first inverter T1 inverts and outputs AC electric energy, and an output interface transmits the AC electric energy to a connected electrical device. At this time, the third resistor R3 and the fourth resistor R4 divide the voltage, triggering the second switch V2 to turn on, and the second capacitor C2 stores energy. The timing is set in conjunction with the fifth resistor R5 and the sixth resistor R6. After the main energy storage device stops supplying power, within the timing, the second capacitor C2 controls the A terminal of the first logic chip J1 to be high. Simultaneously, the first inverter J3 outputs a high level, causing the Y terminal of the first logic chip J1 to control the second power tube Q2 to turn on. The auxiliary energy storage device absorbs the residual electric energy or regenerated electric energy from the first inverter T1. The power of the auxiliary energy storage device is sampled through the seventh resistor R7 and the eighth resistor R8. The sampled signal is greater than the first power supply VCC1 and the ninth power supply VCC1. When the full-charge threshold is set by resistors R9 and R10, the first comparator A1 outputs a high level, controlling the A terminal of the second logic chip J2 to a high level, and controlling the third switch tube V3 to turn on. The eleventh resistor R11 cooperates with the ninth resistor R9, the tenth resistor R10, and the first power supply VCC1 to set a discharge threshold, so that the first comparator A1 outputs a high level when the power of the secondary energy storage device is greater than the discharge threshold. At the same time, the twelfth resistor R12 and the thirteenth resistor R13 sample the power of the primary energy storage device. When the power of the primary energy storage device is lower than the low-voltage threshold set by the fourteenth resistor R14 and the fifteenth resistor R15, the second comparator A2 outputs a high level, causing the Y terminal of the second logic chip J2 to output a high level, controlling the third power tube Q3 and the first switch tube V1 to turn on, and the first power tube Q1 to turn off. The secondary energy storage device is connected in series with the primary energy storage device, and then the power is superimposed and supplies power to the first inverter T1.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0062] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An inverter circuit for an energy storage device, characterized in that: The inverter circuit of the energy storage device includes: a main energy storage module, an inverter module, an output module, a working state detection module, a secondary energy storage control module, a first detection module, a second detection module and an electric energy regulation module; The main energy storage module is connected to the power regulation module and is used to provide a first electric energy, superimpose the first electric energy with the second electric energy provided by the auxiliary energy storage control module transmitted by the power regulation module, and output a third electric energy; The inverter module is connected to the main energy storage module and is used to invert the first electric energy or the third electric energy and output AC electric energy; The output module is connected to the inverter module and is used to transmit AC power to the connected power-consuming equipment; The working status detection module is connected to the main energy storage module, and is used to detect the working status of the main energy storage module and set a timing time, and output a first control signal at a fixed time when the main energy storage module stops supplying power; The secondary energy storage control module is connected to the working state detection module and the inverter module, and is used to receive the first control signal and store the residual electric energy of the inverter module to provide the second electric energy; The first detection module is connected to the main energy storage module and is used to sample the voltage of the first electric energy and set a low-voltage threshold, and output a first detection signal when the sampled signal is less than the low-voltage threshold; The second detection module is connected to the auxiliary energy storage control module and is used to perform voltage sampling on the second electric energy, set a full-charge threshold and a discharge threshold, output a second control signal when the sampling signal is greater than the full-charge threshold, and continuously control the output of the second detection signal when the sampled signal is greater than the discharge threshold; The power regulation module is connected to the first detection module, the second detection module and the auxiliary energy storage control module, and is used to transmit the second power to the main energy storage module and superimpose the second power with the first power when receiving the first detection signal and the second detection signal.

2. The inverter circuit of an energy storage device according to claim 1, characterized in that: The main energy storage module includes a main energy storage device, a first capacitor and a first diode; the inverter module includes a first inverter; the output module includes an output interface; The first end of the main energy storage device is connected to the anode of the first diode and one end of the first capacitor, the cathode of the first diode is connected to the first input end of the first inverter, the second end of the main energy storage device is connected to the power regulation module, the second end of the first inverter and the other end of the first capacitor are both grounded, and the third end and the fourth end of the first inverter are respectively connected to the first end and the second end of the output interface.

3. The inverter circuit of an energy storage device according to claim 2, characterized in that: The working state detection module includes a third resistor, a fourth resistor, a fifth resistor, a second switch tube, a second capacitor, a sixth resistor, a first inverter and a first logic chip; One end of the third resistor is connected to the anode of the first diode and the collector of the second switching tube, the other end of the third resistor is connected to the base of the second switching tube and the input end of the first inverter and is connected to one end of the fifth resistor, one end of the second capacitor and the ground end through the fourth resistor, the emitter of the second switching tube is connected to the other end of the fifth resistor and the other end of the second capacitor and is connected to the A end of the first logic chip through the sixth resistor, the output end of the first inverter is connected to the B end of the first logic chip, and the Y end of the first logic chip is connected to the auxiliary energy storage control module.

4. The inverter circuit of the energy storage device according to claim 3, characterized in that: The auxiliary energy storage control module includes a second diode, a second power tube and an auxiliary energy storage device; The anode of the second diode is connected to the cathode of the first diode, the cathode of the second diode is connected to the drain of the second power tube, the source of the second power tube is connected to the first end of the auxiliary energy storage device, the second detection module and the power regulation module, the second end of the auxiliary energy storage device is grounded, and the gate of the second power tube is connected to the Y end of the first logic chip.

5. The inverter circuit of the energy storage device according to claim 4, characterized in that: The second detection module includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first power supply, a first comparator, a third switch tube and an eleventh resistor; One end of the seventh resistor is connected to the first end of the auxiliary energy storage device, the other end of the seventh resistor is connected to the non-inverting end of the first comparator and is grounded through the eighth resistor, the inverting end of the first comparator is connected to the collector of the third switching tube and one end of the ninth resistor and is connected to the first power supply through the tenth resistor, the emitter of the third switching tube is connected to the other end of the ninth resistor and the ground through the eleventh resistor, and the base of the third switching tube is connected to the output end of the first comparator and the power regulation module.

6. The inverter circuit of the energy storage device according to claim 5, characterized in that: The power regulation module includes a second logic chip, a first power tube, a third power tube, a second resistor, a first resistor and a first switch tube; The A end of the second logic chip is connected to the output end of the first comparator, the Y end of the second logic chip is connected to the gate of the third power tube and is connected to the base of the first switching tube through the second resistor, the B end of the second logic chip is connected to the first detection module, the drain of the third power tube is connected to the first end of the auxiliary energy storage device, the source of the third power tube is connected to the second end of the main energy storage device and the drain of the first power tube, the gate of the first power tube is connected to the collector of the first switching tube and is connected to the first end of the main energy storage device through the first resistor, and the source of the first power tube and the emitter of the first switching tube are both connected to the second end of the auxiliary energy storage device.

7. The inverter circuit of the energy storage device according to claim 6, characterized in that: The first detection module includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor and a second comparator; One end of the twelfth resistor is connected to the first end of the main energy storage device and is connected to the non-inverting end of the second comparator and one end of the fifteenth resistor through the fourteenth resistor. The inverting end of the second comparator is connected to the other end of the twelfth resistor and is connected to the second end of the main energy storage device and the other end of the fifteenth resistor through the thirteenth resistor. The output end of the second comparator is connected to the B end of the second logic chip.

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