Optical storage integrated circuit and control method thereof

Abstract

The present application relates to a photovoltaic energy storage integrated circuit and a control method thereof, and relates to the field of photovoltaic energy storage. The photovoltaic energy storage integrated circuit includes an MPPT circuit, a bidirectional BUCK-BOOST circuit, a bypass circuit, a bus capacitor, and an inverter circuit; the positive electrode of the battery is connected to the first end of the bidirectional BUCK-BOOST circuit, the negative electrode of the battery is connected to the second end of the bidirectional BUCK-BOOST circuit, the third end of the bidirectional BUCK-BOOST circuit is connected to the first end of the DC side of the inverter circuit, and the negative electrode of the battery is connected to the second end of the DC side of the inverter circuit; the first end of the bypass circuit is connected to the positive electrode of the battery, and the second end of the bypass circuit is connected to the first end of the DC side of the inverter circuit; the bypass circuit is turned on when the voltage of the battery is greater than the inverter threshold of the inverter circuit, so as to realize the direct connection of the positive electrode of the battery to the first end of the DC side of the inverter circuit, and realize battery charging and discharging through the inverter circuit. The present application can improve the efficiency of the existing photovoltaic energy storage integrated circuit and further expand the input range of the battery voltage.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic energy storage, and in particular to a photovoltaic energy storage integrated circuit and a control method thereof. Background Art

[0002] The current photovoltaic and storage integrated circuits include an MPPT (Maximum Power Point Tracking) circuit with a boost function, a bidirectional BUCK-BOOST (buck or boost chopper) circuit with a buck-boost function, and an inverter circuit.

[0003] like Figure 1 The figure shows the integrated optical storage circuit of the current mainstream manufacturers. Figure 1 In the invention, the photovoltaic storage integrated circuit includes an MPPT circuit, a bidirectional BUCK-BOOST circuit, a bus capacitor Cbus and an inverter circuit. The positive electrode PV+ of the photovoltaic module is connected to the first input terminal of the MPPT circuit, the negative electrode PV- of the photovoltaic module is connected to the second input terminal of the MPPT circuit, the first output terminal of the MPPT circuit is connected to the first terminal of the DC side of the inverter circuit, the second output terminal of the MPPT circuit is connected to the second terminal of the DC side of the inverter circuit, the first terminal of the bus capacitor Cbus is connected to the first terminal of the DC side of the inverter circuit, the second terminal of the bus capacitor Cbus is connected to the second terminal of the DC side of the inverter circuit, the positive electrode BAT+ of the battery is connected to the first terminal of the bidirectional BUCK-BOOST circuit, the negative electrode BAT- of the battery is connected to the second terminal of the bidirectional BUCK-BOOST circuit, the third terminal of the bidirectional BUCK-BOOST circuit is connected to the first terminal of the DC side of the inverter circuit, the negative electrode BAT- of the battery is connected to the second terminal of the DC side of the inverter circuit, the first terminal of the AC side of the inverter circuit is connected to the power grid, and the second terminal of the AC side of the inverter circuit is connected to the load.

[0004] The bidirectional BUCK-BOOST circuit includes a battery side inductor Lbat, a battery side capacitor Cbat, a first switch tube Q1 and a second switch tube Q2; the positive electrode BAT+ of the battery is connected to the first end of the battery side inductor Lbat, the second end of the battery side inductor Lbat is connected to the emitter of the first switch tube Q1, the collector of the first switch tube Q1 is connected to the first end of the DC side of the inverter circuit, the first end of the battery side capacitor Cbat is connected to the positive electrode BAT+ of the battery, the second end of the battery side capacitor Cbat is connected to the negative electrode BAT- of the battery, the collector of the second switch tube Q2 is connected to the second end of the battery side inductor Lbat, and the emitter of the second switch tube Q2 is connected to the negative electrode BAT- of the battery.

[0005] However, if Figure 1The photovoltaic-storage integrated circuit shown has two disadvantages: (1) Q1 and Q2 in the bidirectional BUCK-BOOST circuit are controlled by a complementary PWM control circuit. Q1 and Q2 are in a high-frequency working state for a long time, which greatly affects the efficiency of the photovoltaic-storage integrated circuit. In particular, under low power conditions, the efficiency of the photovoltaic-storage integrated circuit is relatively low. (2) The input range of the battery voltage is relatively narrow. The battery voltage must be lower than the bus voltage to achieve bidirectional charging and discharging, where the bus voltage refers to the voltage at the first end of the DC side of the inverter circuit. Summary of the invention

[0006] The present application provides a photovoltaic and battery-storage integrated circuit and a control method thereof, which can improve the efficiency of the existing photovoltaic and battery-storage integrated circuit and further expand the input range of the battery voltage.

[0007] In a first aspect, an embodiment of the present application provides a photovoltaic storage integrated circuit, including an MPPT circuit, a bidirectional BUCK-BOOST circuit, a bypass circuit, a bus capacitor, and an inverter circuit;

[0008] The positive electrode of the photovoltaic module is connected to the first input end of the MPPT circuit, the negative electrode of the photovoltaic module is connected to the second input end of the MPPT circuit, the first output end of the MPPT circuit is connected to the first end of the DC side of the inverter circuit, the second output end of the MPPT circuit is connected to the second end of the DC side of the inverter circuit, the first end of the bus capacitor is connected to the first end of the DC side of the inverter circuit, the second end of the bus capacitor is connected to the second end of the DC side of the inverter circuit, the positive electrode of the battery is connected to the first end of the bidirectional BUCK-BOOST circuit, the negative electrode of the battery is connected to the second end of the bidirectional BUCK-BOOST circuit, the third end of the bidirectional BUCK-BOOST circuit is connected to the first end of the DC side of the inverter circuit, the negative electrode of the battery is connected to the second end of the DC side of the inverter circuit, the first end of the AC side of the inverter circuit is connected to the power grid, and the second end of the AC side of the inverter circuit is connected to the load;

[0009] The first end of the bypass circuit is connected to the positive electrode of the battery, and the second end of the bypass circuit is connected to the first end of the DC side of the inverter circuit;

[0010] The bypass circuit is turned on when the voltage of the battery is greater than the inverter threshold of the inverter circuit, so that the positive electrode of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit.

[0011] Optionally, the bidirectional BUCK-BOOST circuit includes a battery-side inductor, a battery-side capacitor, a first switch tube, and a second switch tube;

[0012] The positive electrode of the battery is connected to the first end of the battery-side inductor, the second end of the battery-side inductor is connected to the emitter of the first switch tube, the collector of the first switch tube is connected to the first end of the DC side of the inverter circuit, the first end of the battery-side capacitor is connected to the positive electrode of the battery, the second end of the battery-side capacitor is connected to the negative electrode of the battery, the collector of the second switch tube is connected to the second end of the battery-side inductor, and the emitter of the second switch tube is connected to the negative electrode of the battery.

[0013] Optionally, the bypass circuit includes a diode;

[0014] The anode of the diode is connected to the anode of the battery, and the cathode of the diode is connected to the first end of the DC side of the inverter circuit.

[0015] Optionally, the bypass circuit includes a third switch tube and a diode;

[0016] The positive electrode of the battery is connected to the collector of the third switch tube, the emitter of the third switch tube is connected to the positive electrode of the diode, and the negative electrode of the diode is connected to the first end of the DC side of the inverter circuit.

[0017] Optionally, the bypass circuit includes a contact relay;

[0018] The positive electrode of the battery is connected to the first end of the contact relay, and the second end of the contact relay is connected to the first end of the DC side of the inverter circuit.

[0019] Optionally, the bypass circuit includes a contact relay and a solid-state relay;

[0020] The positive electrode of the battery is connected to the first end of the contact relay, the second end of the contact relay is connected to the first end of the DC side of the inverter circuit, the positive electrode of the battery is connected to the first end of the solid-state relay, and the second end of the solid-state relay is connected to the first end of the DC side of the inverter circuit.

[0021] In a second aspect, an embodiment of the present application provides a control method for an integrated optical storage circuit, which is applied to the integrated optical storage circuit described in the first aspect, and the method includes:

[0022] Detecting a bus voltage and a battery voltage, wherein the bus voltage refers to a voltage at a first end of a DC side of the inverter circuit;

[0023] Acquiring an operation instruction, wherein the operation instruction includes a charging instruction and a discharging instruction;

[0024] When the operation instruction is a discharge instruction, comparing the battery voltage, the bus voltage and the inverter threshold of the inverter circuit;

[0025] If the battery voltage is equal to the bus voltage and the battery voltage is greater than the inverter threshold of the inverter circuit, the first switch tube is controlled to be turned off and the second switch tube is controlled to be turned off to realize the conduction of the bypass circuit, the positive electrode of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit.

[0026] Optionally, after comparing the battery voltage, the bus voltage and the inverter threshold of the inverter circuit, the method further includes:

[0027] If the battery voltage is lower than the bus voltage, and the battery voltage is lower than or equal to the inversion threshold of the inverter circuit, the first switch tube is controlled to be turned off, and the second switch tube is controlled to be turned on.

[0028] Optionally, after obtaining the operation instruction, the method further includes:

[0029] When the operation instruction is a charging instruction, the inverter circuit or the MPPT circuit is controlled to increase the bus voltage, the first switch tube is controlled to be turned on, and the second switch tube is controlled to be turned off.

[0030] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: In the embodiment of the present application, the photovoltaic storage integrated machine circuit includes an MPPT circuit, a bidirectional BUCK-BOOST circuit, a bypass circuit, a bus capacitor and an inverter circuit, the first end of the bypass circuit is connected to the positive electrode of the battery, the second end of the bypass circuit is connected to the first end of the DC side of the inverter circuit, and the bypass circuit is turned on when the voltage of the battery is greater than the inverter threshold of the inverter circuit, so as to realize that the positive electrode of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit. Compared with the photovoltaic storage integrated machine circuit in the prior art, the photovoltaic storage integrated machine circuit provided by the present application adds a bypass circuit. When the battery voltage is high and greater than the inverter threshold of the inverter circuit, the bypass circuit is turned on, the discharge current directly goes from the bypass circuit, the positive electrode of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit, which reduces the switching loss of the bidirectional BUCK-BOOST circuit, thereby reducing the switching loss of the photovoltaic storage integrated machine circuit and improving the efficiency of the photovoltaic storage integrated machine circuit. Moreover, the bypass circuit is turned on when the battery voltage is greater than the inverter threshold of the inverter circuit, so that the positive electrode of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit. The battery voltage can be equal to the bus voltage and greater than the inverter threshold of the inverter circuit, effectively expanding the input range of the battery voltage. The efficiency of the existing photovoltaic storage integrated circuit can be improved and the input range of the battery voltage can be further expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 It is the optical storage integrated circuit of the mainstream manufacturer in the existing technology;

[0034] Figure 2 This is a schematic diagram of the structure of the optical storage integrated circuit in the embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of the structure of the optical storage integrated circuit in a specific embodiment of the present application;

[0036] Figure 4 This is a schematic diagram of the structure of the optical storage integrated circuit in a specific embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the structure of the optical storage integrated circuit in a specific embodiment of the present application;

[0038] Figure 6 This is a schematic diagram of the structure of the optical storage integrated circuit in a specific embodiment of the present application;

[0039] Figure 7 This is a schematic diagram of the structure of the optical storage integrated circuit in a specific embodiment of the present application;

[0040] Figure 8 Schematic diagram of the method flow of controlling the optical storage integrated circuit in the embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] In the present application embodiment, Figure 2As shown, a photovoltaic storage integrated circuit is provided, including an MPPT circuit, a bidirectional BUCK-BOOST circuit, a bypass circuit, a bus capacitor Cbus and an inverter circuit.

[0043] The positive pole PV+ of the photovoltaic module is connected to the first input end of the MPPT circuit, the negative pole PV- of the photovoltaic module is connected to the second input end of the MPPT circuit, the first output end of the MPPT circuit is connected to the first end of the DC side of the inverter circuit, the second output end of the MPPT circuit is connected to the second end of the DC side of the inverter circuit, the first end of the bus capacitor Cbus is connected to the first end of the DC side of the inverter circuit, the second end of the bus capacitor Cbus is connected to the second end of the DC side of the inverter circuit, the positive pole BAT+ of the battery is connected to the first end of the bidirectional BUCK-BOOST circuit, the negative pole BAT- of the battery is connected to the second end of the bidirectional BUCK-BOOST circuit, the third end of the bidirectional BUCK-BOOST circuit is connected to the first end of the DC side of the inverter circuit, the negative pole BAT- of the battery is connected to the second end of the DC side of the inverter circuit, the first end of the AC side of the inverter circuit is connected to the power grid, and the second end of the AC side of the inverter circuit is connected to the load.

[0044] A first end of the bypass circuit is connected to the positive electrode BAT+ of the battery, and a second end of the bypass circuit is connected to a first end of the DC side of the inverter circuit.

[0045] The bypass circuit is turned on when the voltage of the battery is greater than the inverter threshold of the inverter circuit, so as to directly connect the positive electrode of the battery to the first terminal of the DC side of the inverter circuit and realize battery charging and discharging through the inverter circuit.

[0046] Compared with the integrated photovoltaic and storage circuit in the prior art, the integrated photovoltaic and storage circuit provided by the present application adds a bypass circuit. When the battery voltage is high and greater than the inverter threshold of the inverter circuit, the bypass circuit is turned on, and the discharge current directly goes through the bypass circuit. The positive pole of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit, which reduces the switching loss of the bidirectional BUCK-BOOST circuit, thereby reducing the switching loss of the integrated photovoltaic and storage circuit and improving the efficiency of the integrated photovoltaic and storage circuit. Moreover, the bypass circuit is turned on when the battery voltage is greater than the inverter threshold of the inverter circuit, so as to realize the direct connection of the positive pole of the battery to the first end of the DC side of the inverter circuit, and realize the battery charging and discharging through the inverter circuit. The battery voltage can be equal to the bus voltage and greater than the inverter threshold of the inverter circuit, which effectively expands the input range of the battery voltage. The efficiency of the existing integrated photovoltaic and storage circuit can be improved and the input range of the battery voltage can be further expanded.

[0047] In a specific embodiment, Figure 3 As shown, the bidirectional BUCK-BOOST circuit includes a battery side inductor Lbat, a battery side capacitor Cbat, a first switch tube Q1 and a second switch tube Q2;

[0048] The positive electrode BAT+ of the battery is connected to the first end of the battery side inductor Lbat, the second end of the battery side inductor Lbat is connected to the emitter of the first switch tube Q1, the collector of the first switch tube Q1 is connected to the first end of the DC side of the inverter circuit, the first end of the battery side capacitor Cbat is connected to the positive electrode BAT+ of the battery, the second end of the battery side capacitor Cbat is connected to the negative electrode BAT- of the battery, the collector of the second switch tube Q2 is connected to the second end of the battery side inductor Lbat, and the emitter of the second switch tube Q2 is connected to the negative electrode BAT- of the battery.

[0049] In a specific embodiment, Figure 4 As shown, the bypass circuit includes a diode D1;

[0050] The positive electrode of the diode D1 is connected to the positive electrode BAT+ of the battery, and the negative electrode of the diode D1 is connected to the first end of the DC side of the inverter circuit.

[0051] In a specific embodiment, Figure 5 As shown, the bypass circuit includes a third switch tube Q3 and a diode D1;

[0052] The positive electrode BAT+ of the battery is connected to the collector of the third switch tube Q3, the emitter of the third switch tube Q3 is connected to the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected to the first end of the DC side of the inverter circuit.

[0053] The third switch tube Q3 may be an IGBT (Insulate-Gate Bipolar Transistor).

[0054] On the basis of the diode D1, a third switch tube Q3 is connected in series, which adds a fast cut-off function and a fast speed.

[0055] In a specific embodiment, Figure 6 As shown, the bypass circuit includes a contact relay K;

[0056] The positive electrode BAT+ of the battery is connected to a first end of a contact relay K, and a second end of the contact relay K is connected to a first end of a DC side of the inverter circuit.

[0057] Compared with the diode, the efficiency of using a contact relay K is higher, which is consistent with the direct connection effect.

[0058] In a specific embodiment, Figure 7 As shown, the bypass circuit includes a contact relay K and a solid-state relay SSR;

[0059] The positive electrode BAT+ of the battery is connected to the first end of the contact relay K, the second end of the contact relay K is connected to the first end of the DC side of the inverter circuit, the positive electrode BAT+ of the battery is connected to the first end of the solid-state relay SSR, and the second end of the solid-state relay SSR is connected to the first end of the DC side of the inverter circuit.

[0060] Using solid-state relays in parallel with contact relays can achieve a combination of speed and efficiency.

[0061] Based on the same concept, a control method for an integrated optical storage circuit is provided in an embodiment of the present application. The control method for the integrated optical storage circuit is applied to the integrated optical storage circuit provided in the present application. The specific implementation of the control method for the integrated optical storage circuit can refer to the description of the integrated optical storage circuit embodiment part, and the repeated parts will not be repeated. Figure 8 As shown, the method mainly includes:

[0062] Step 801, detecting the bus voltage and the battery voltage.

[0063] The bus voltage refers to the voltage at the first end of the DC side of the inverter circuit.

[0064] Step 802, obtaining operation instructions.

[0065] The operation instructions include charging instructions and discharging instructions.

[0066] In a specific embodiment, after obtaining the operation instruction, it also includes: when the operation instruction is a charging instruction, controlling the inverter circuit or the MPPT circuit to increase the bus voltage, controlling the first switch tube to turn on, and controlling the second switch tube to turn off. At this time, the bypass circuit is disconnected. The diode included in the second switch tube acts as a freewheeling diode of the BUCK circuit, enabling energy to flow from the bus to the battery to charge the battery.

[0067] Step 803: When the operation instruction is a discharge instruction, compare the battery voltage, the bus voltage and the inverter threshold of the inverter circuit.

[0068] In a specific embodiment, after comparing the battery voltage, the bus voltage and the inverter threshold of the inverter circuit, the method further includes: if the battery voltage is less than the bus voltage, and the battery voltage is less than or equal to the inverter threshold of the inverter circuit, the first switch tube is controlled to be turned off and the second switch tube is controlled to be turned on. The diode included in the first switch tube acts as a freewheeling diode of the BOOST circuit, and the battery voltage is increased to charge the bus.

[0069] Step 804: If the battery voltage is equal to the bus voltage and the battery voltage is greater than the inverter threshold of the inverter circuit, the first switch tube is controlled to be turned off and the second switch tube is controlled to be turned off to realize the conduction of the bypass circuit, and the positive electrode of the battery is directly connected to the first terminal of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit.

[0070] Q1 and Q2 of the bidirectional BUCK-BOOST circuit are independently controlled, and are not complementary control circuits. There is a situation where the first switch tube Q1 and the second switch tube Q2 are turned off at the same time, which effectively reduces the loss.

[0071] When the battery voltage is high, the battery voltage is equal to the bus voltage, and the battery voltage is greater than the inverter threshold of the inverter circuit, the first switch tube is controlled to be turned off, and the second switch tube is controlled to be turned off to realize the conduction of the bypass circuit. The discharge current directly goes through the bypass circuit, and the positive pole of the battery is directly connected to the first end of the DC side of the inverter circuit. The battery is charged and discharged through the inverter circuit, which reduces the switching loss of the bidirectional BUCK-BOOST circuit, thereby reducing the switching loss of the photovoltaic storage integrated circuit and improving the efficiency of the photovoltaic storage integrated circuit. Moreover, the battery voltage can be equal to the bus voltage and greater than the inverter threshold of the inverter circuit, which effectively expands the input range of the battery voltage. The efficiency of the existing photovoltaic storage integrated circuit can be improved and the input range of the battery voltage can be further expanded.

[0072] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0073] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A circuit for an integrated optical storage device, characterized in that: Including MPPT circuit, bidirectional BUCK-BOOST circuit, bypass circuit, bus capacitor and inverter circuit; The positive electrode of the photovoltaic module is connected to the first input end of the MPPT circuit, the negative electrode of the photovoltaic module is connected to the second input end of the MPPT circuit, the first output end of the MPPT circuit is connected to the first end of the DC side of the inverter circuit, the second output end of the MPPT circuit is connected to the second end of the DC side of the inverter circuit, the first end of the bus capacitor is connected to the first end of the DC side of the inverter circuit, the second end of the bus capacitor is connected to the second end of the DC side of the inverter circuit, the positive electrode of the battery is connected to the first end of the bidirectional BUCK-BOOST circuit, the negative electrode of the battery is connected to the second end of the bidirectional BUCK-BOOST circuit, the third end of the bidirectional BUCK-BOOST circuit is connected to the first end of the DC side of the inverter circuit, the negative electrode of the battery is connected to the second end of the DC side of the inverter circuit, the first end of the AC side of the inverter circuit is connected to the power grid, and the second end of the AC side of the inverter circuit is connected to the load; The first end of the bypass circuit is connected to the positive electrode of the battery, and the second end of the bypass circuit is connected to the first end of the DC side of the inverter circuit; The bypass circuit is turned on when the voltage of the battery is greater than the inverter threshold of the inverter circuit, so that the positive electrode of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit; The bidirectional BUCK-BOOST circuit includes a battery side inductor, a battery side capacitor, a first switch tube and a second switch tube; The positive electrode of the battery is connected to the first end of the battery-side inductor, the second end of the battery-side inductor is connected to the emitter of the first switch tube, the collector of the first switch tube is connected to the first end of the DC side of the inverter circuit, the first end of the battery-side capacitor is connected to the positive electrode of the battery, the second end of the battery-side capacitor is connected to the negative electrode of the battery, the collector of the second switch tube is connected to the second end of the battery-side inductor, and the emitter of the second switch tube is connected to the negative electrode of the battery; The bypass circuit is turned on by turning off the first switch tube and the second switch tube when the battery voltage is equal to the bus voltage and the battery voltage is greater than the inversion threshold of the inverter circuit.

2. The integrated optical storage circuit according to claim 1, characterized in that: The bypass circuit includes a contact relay; The positive electrode of the battery is connected to the first end of the contact relay, and the second end of the contact relay is connected to the first end of the DC side of the inverter circuit.

3. The integrated optical storage circuit according to claim 1, characterized in that: The bypass circuit includes a contact relay and a solid-state relay; The positive electrode of the battery is connected to the first end of the contact relay, the second end of the contact relay is connected to the first end of the DC side of the inverter circuit, the positive electrode of the battery is connected to the first end of the solid-state relay, and the second end of the solid-state relay is connected to the first end of the DC side of the inverter circuit.

4. A control method for a circuit of an integrated optical storage device, characterized in that: Applied to the integrated optical storage circuit of claim 1, the method comprises: Detecting a bus voltage and a battery voltage, wherein the bus voltage refers to a voltage at a first end of a DC side of the inverter circuit; Acquiring an operation instruction, wherein the operation instruction includes a charging instruction and a discharging instruction; When the operation instruction is a discharge instruction, comparing the battery voltage, the bus voltage and the inverter threshold of the inverter circuit; If the battery voltage is equal to the bus voltage and the battery voltage is greater than the inverter threshold of the inverter circuit, the first switch tube is controlled to be turned off and the second switch tube is controlled to be turned off to realize the conduction of the bypass circuit, the positive electrode of the battery is directly connected to the first end of the DC side of the inverter circuit, and the battery is charged and discharged through the inverter circuit.

5. The control method of the integrated optical storage circuit according to claim 4, characterized in that: After comparing the battery voltage, the bus voltage and the inverter threshold of the inverter circuit, the method further includes: If the battery voltage is lower than the bus voltage, and the battery voltage is lower than or equal to the inversion threshold of the inverter circuit, the first switch tube is controlled to be turned off, and the second switch tube is controlled to be turned on.

6. The control method of the integrated optical storage circuit according to claim 4, characterized in that: After obtaining the operation instruction, the method further includes: When the operation instruction is a charging instruction, the inverter circuit or the MPPT circuit is controlled to increase the bus voltage, the first switch tube is controlled to be turned on, and the second switch tube is controlled to be turned off.

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