Energy storage inverter and energy storage power supply with wide voltage input and output

Abstract

The utility model relates to the technical field of energy storage power supplies, in particular to an energy storage inverter with wide voltage input and output and an energy storage power supply, and the energy storage inverter comprises a transformer T1, a transformer turn ratio adjusting circuit and a control circuit, the transformer T1 is connected with the transformer turn ratio adjusting circuit, the transformer turn ratio adjusting circuit is respectively connected with the control circuit, the battery pack and the load, and the control circuit is connected with the battery pack. The control circuit is used for obtaining the output voltage of the battery pack and the working mode of the energy storage inverter, and controlling the transformer turn ratio adjusting circuit to adjust the coil turn ratio of the primary side to the secondary side of the transformer T1 based on the output voltage and the working mode, so as to output a target voltage corresponding to the working mode to a load. Or inputting the target voltage corresponding to the working mode to the battery pack. Therefore, the energy storage inverter can change the input voltage or the output voltage of the energy storage inverter by changing the turn ratio of the transformer T1, so that the range of the input voltage and the output voltage of the energy storage inverter is widened.

Description

[Technical field]

[0001] The utility model relates to the technical field of energy storage power supplies, and in particular to an energy storage inverter and an energy storage power supply with a wide voltage input and output. [Background technology]

[0002] Solar photovoltaic power generation has the advantages of being clean, environmentally friendly, and inexhaustible, and can achieve the goal of energy conservation and emission reduction to the greatest extent. The energy storage inverter is a portable power supply device that integrates photovoltaic power generation, power storage, and AC output. It can provide AC power to loads in emergency situations or outdoors where there is a lack of municipal power, and is therefore favored by more and more users.

[0003] At present, a variety of energy storage inverter products have emerged in the market, but these energy storage inverter products have the following shortcomings: First, the transformer adopts a fixed turns ratio design. Under the fixed frequency control strategy, the gain of the transformer is almost unchanged. Therefore, the DC input voltage range allowed on the DC input side of the inverter is small, and the design of the energy storage power supply is greatly limited;

[0004] Secondly, a high- and low-voltage inverter separation design is adopted. The AC output voltage range of the high-voltage energy storage inverter is designed to be within the range of 220V to 240V, and the AC charging voltage range is designed to be within the range of 186V-264V. The AC output voltage range of the low-voltage energy storage inverter is designed to be within the range of 100V to 120V, and the AC charging voltage range is designed to be within the range of 85V-132V. In this way, a single high-voltage energy storage inverter or a single low-voltage energy storage inverter is greatly limited in the types of load equipment that can be carried, and its AC charging will also be limited by the voltage range, which also restricts the promotion and application of energy storage inverters to a certain extent. [Contents of the utility model]

[0005] The embodiments of the utility model provide an energy storage inverter and an energy storage power supply with wide voltage input and output, aiming to solve the technical problems of small voltage input range and single load of energy storage inverter in the prior art.

[0006] In order to solve the above technical problems, a technical solution adopted by the embodiment of the utility model is: to provide an energy storage inverter with wide voltage input and output, wherein the energy storage inverter with wide voltage input and output includes a transformer T1, a transformer turns ratio adjustment circuit and a control circuit;

[0007] The transformer T1 is connected to the transformer turns ratio adjustment circuit, the transformer turns ratio adjustment circuit is connected to the control circuit and the battery pack respectively, the control circuit is also connected to the battery pack, and the transformer turns ratio adjustment circuit is also used to connect a load;

[0008] The control circuit is used to obtain the output voltage of the battery pack and the operating mode of the wide voltage input and output energy storage inverter, and control the transformer turns ratio adjustment circuit to adjust the turns ratio of the primary and secondary coils of the transformer T1 based on the output voltage and the operating mode, so as to output the target voltage corresponding to the operating mode to the load, or input the target voltage corresponding to the operating mode to the battery pack.

[0009] Optionally, the transformer turns ratio adjustment circuit includes a primary coil adjustment module and a secondary coil adjustment module;

[0010] The primary coil regulation module is connected to the battery pack and the control circuit respectively, and is also connected to the primary side of the transformer T1. The secondary coil regulation module is connected to the control circuit and the load respectively, and is also connected to the secondary side of the transformer T1.

[0011] The primary coil adjustment module is used to receive the first control signal output by the control circuit, and adjust the connection mode of the primary side of the transformer T1 according to the first control signal;

[0012] The secondary coil adjustment module is used to receive the second control signal output by the control circuit, and adjust the connection mode of the secondary side of the transformer T1 according to the second control signal.

[0013] Optionally, the primary side of the transformer T1 includes a coil N1 and a coil N2, and the secondary side of the transformer T1 includes a coil N3 and a coil N4;

[0014] The coil N1 is connected to the primary coil regulation module, the coil N2 is connected to the battery pack and the primary coil regulation module respectively, the coil N3 is connected to the secondary coil regulation module, and the coil N4 is connected to the load and the secondary coil regulation module respectively.

[0015] Optionally, the primary coil adjustment module includes a first primary adjustment unit, a second primary adjustment unit, a third primary adjustment unit and a fourth primary adjustment unit;

[0016] The first end of the first primary regulation unit is connected to the battery pack, the second end of the first primary regulation unit is respectively connected to the coil N1 and the second primary regulation unit, the second primary regulation unit is respectively connected to the coil N2 and the third primary regulation unit, the third primary regulation unit is respectively connected to the battery pack and the fourth primary regulation unit, the fourth primary regulation unit is connected to the coil N1, and the control ends of the first primary regulation unit, the second primary regulation unit, the third primary regulation unit and the fourth primary regulation unit are all connected to the control circuit.

[0017] Optionally, the secondary coil regulation module includes a first secondary regulation unit, a second secondary regulation unit, a third secondary regulation unit and a fourth secondary regulation unit;

[0018] The first end of the first secondary side regulation unit is connected to the load, the second end of the first secondary side regulation unit is respectively connected to the second secondary side regulation unit and the coil N3, the second secondary side regulation unit is respectively connected to the coil N4 and the third secondary side regulation unit, the third secondary side regulation unit is respectively connected to the load and the fourth secondary side regulation unit, the fourth secondary side regulation unit is connected to the coil N3, and the control ends of the first secondary side regulation unit, the second secondary side regulation unit, the third secondary side regulation unit and the fourth secondary side regulation unit are all connected to the control circuit.

[0019] Optionally, at least one of the first primary regulation unit, the second primary regulation unit, the third primary regulation unit, the fourth primary regulation unit and the first secondary regulation unit, the second secondary regulation unit, the third secondary regulation unit, and the fourth secondary regulation unit comprises a resistor R1, a resistor R3, a switch tube Q1, a relay RLY1, and a diode D1;

[0020] The control end of the switch tube Q1 is connected to the control circuit through the resistor R1, and the switch tube Q1 is also grounded through the resistor R3. The first end of the switch tube Q1 is respectively connected to the coil end of the relay RLY1 and the anode of the diode D1, and the coil end of the relay RLY1 is also respectively connected to the cathode of the diode D1 and the first voltage, and the contact group of the relay RLY1 is respectively connected to the battery pack / load and the transformer T1.

[0021] Optionally, the energy storage inverter with wide voltage input and output further includes a drive circuit;

[0022] The driving circuit is connected to the control circuit and the transformer turns ratio adjustment circuit respectively;

[0023] The driving circuit is used to receive the control signal output by the control circuit, and output a driving signal to the transformer turns ratio adjustment circuit based on the control signal.

[0024] Optionally, the energy storage inverter with wide voltage input and output further includes a voltage detection circuit;

[0025] The voltage detection circuit is connected to the battery pack and the control circuit respectively;

[0026] The voltage detection circuit is used to detect the output voltage of the battery pack and output the detected output voltage to the control circuit.

[0027] Optionally, the energy storage inverter with wide voltage input and output further includes a working mode setting circuit;

[0028] The working mode setting circuit is connected to the control circuit;

[0029] The working mode setting circuit is used to receive an operating instruction and determine the working mode of the energy storage inverter with a wide voltage input and output based on the operating instruction.

[0030] In order to solve the above technical problems, another technical solution adopted by the embodiment of the utility model is: to provide an energy storage power supply, characterized in that the energy storage power supply comprises:

[0031] Battery pack; and

[0032] The energy storage inverter with wide voltage input and output as described above, wherein the energy storage inverter with wide voltage input and output is connected to the battery pack.

[0033] Different from the related art, the utility model provides an energy storage inverter and energy storage power supply with wide voltage input and output, the energy storage inverter includes a transformer T1, a transformer turn ratio adjustment circuit and a control circuit; the transformer T1 is connected to the transformer turn ratio adjustment circuit, the transformer turn ratio adjustment circuit is respectively connected to the control circuit and the battery pack, the control circuit is also connected to the battery pack, and the transformer turn ratio adjustment circuit is also used to connect the load. The control circuit is used to obtain the output voltage of the battery pack and the working mode of the energy storage inverter with wide voltage input and output, and control the transformer turn ratio adjustment circuit based on the output voltage and working mode to adjust the coil turns ratio of the primary and secondary sides of the transformer T1, so as to output the target voltage corresponding to the working mode to the load, or input the target voltage corresponding to the working mode to the battery pack. Based on this, the energy storage inverter can change the input voltage or output voltage of the energy storage inverter by changing the turns ratio of the transformer T1, thereby increasing the range of the input voltage and output voltage of the energy storage inverter.

Brief Description of the Drawings

[0034] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0035] Figure 1 This is an application scenario provided by an embodiment of the utility model;

[0036] Figure 2 This is a structural block diagram of a wide voltage input and output energy storage inverter provided by an embodiment of the utility model;

[0037] Figure 3 The utility model provides a circuit diagram of a transformer turns ratio adjustment circuit according to an embodiment of the utility model. [Specific implementation method]

[0038] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0039] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0040] When an element is referred to as being “connected to” another element, it can be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0041] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more.

[0042] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0043] See also Figure 1 , Figure 1 This is an application scenario provided by the embodiment of the utility model, such as Figure 1 As shown, the application scenario 1 includes an energy storage power supply 100 and a load 200 ; wherein the energy storage power supply 100 is connected to the load 200 .

[0044] In some embodiments, when the load 200 is an electrical device, the energy storage power supply 100 is used to supply power to the load 200 .

[0045] In another embodiment, when the load 200 is a power grid, the energy storage power supply 100 is used to receive and store electrical energy input from the power grid.

[0046] Further, such as Figure 1 As shown, the energy storage power supply 100 includes a battery pack 10 and a wide voltage input and output energy storage inverter 20 , the battery pack 10 is connected to the wide voltage input and output energy storage inverter 20 , and the wide voltage input and output energy storage inverter 20 is also used to connect the load 200 .

[0047] Among them, when the load 200 is an electrical device, the wide voltage input and output energy storage inverter 20 is used to obtain the output voltage of the battery pack 10 and the working mode of the wide voltage input and output energy storage inverter 20, and output the target voltage to the electrical device based on the working mode and the output voltage of the battery pack 10, so that the electrical device starts working based on the target voltage.

[0048] In another embodiment, when the load 200 is a power grid, the wide voltage input and output energy storage inverter 20 is used to obtain the output voltage of the battery pack 10 and the working mode of the wide voltage input and output energy storage inverter 20, so as to input the target voltage to the battery pack 10 according to the output voltage and the working mode, so as to charge the battery pack 10.

[0049] For details, please refer to Figure 2 , Figure 2 This is a structural block diagram of a wide voltage input and output energy storage inverter provided by an embodiment of the utility model, such as Figure 2 As shown, the energy storage inverter 20 with wide voltage input and output includes a transformer T1, a transformer turns ratio adjustment circuit 21 and a control circuit 22;

[0050] The transformer T1 is connected to the transformer turns ratio adjustment circuit 21, the transformer turns ratio adjustment circuit 21 is connected to the control circuit 22 and the battery pack 10 respectively, the control circuit 22 is also connected to the battery pack 10, and the transformer turns ratio adjustment circuit 21 is also used to connect to the load 200;

[0051] The control circuit 22 is used to obtain the output voltage of the battery pack 10 and the working mode of the wide voltage input and output energy storage inverter 20, and control the transformer turns ratio adjustment circuit 21 to adjust the turns ratio of the primary and secondary coils of the transformer T1 based on the output voltage and the working mode, so as to output the target voltage corresponding to the working mode to the load 200, or input the target voltage corresponding to the working mode to the battery pack 10.

[0052] It should be noted that the working mode of the energy storage inverter 20 with wide voltage input and output is a high voltage mode and a low voltage mode. By obtaining the working mode of the energy storage inverter 20 with wide voltage input and output, it is determined whether the voltage required / input by the load 200 is low voltage or high voltage, so as to input / output the corresponding voltage to the load 200 or the battery pack 10. For example, when the load 200 is an electrical device, and the rated voltage of the electrical device is in low voltage mode, the working mode of the energy storage inverter 20 with wide voltage input and output is low voltage mode. At this time, the transformer turns ratio adjustment circuit 21 can be controlled according to the low voltage mode to adjust the turns ratio of the transformer T1 to the turns ratio of the low voltage mode, so as to output low voltage to the electrical device.

[0053] Further, such as Figure 2 As shown, the transformer turns ratio adjustment circuit 21 includes a primary coil adjustment module 211 and a secondary coil adjustment module 212;

[0054] The primary coil regulation module 211 is connected to the battery pack 10 and the control circuit 22 respectively, and is also connected to the primary side of the transformer T1. The secondary coil regulation module 212 is connected to the control circuit 22 and the load 200 respectively, and is also connected to the secondary side of the transformer T1.

[0055] The primary coil adjustment module 211 is used to receive the first control signal output by the control circuit 22, and adjust the connection mode of the primary side of the transformer T1 according to the first control signal;

[0056] The secondary coil adjustment module 212 is used to receive the second control signal output by the control circuit 22 and adjust the connection mode of the secondary side of the transformer T1 according to the second control signal.

[0057] In some embodiments, Figure 2 As shown, the wide voltage input and output energy storage inverter 20 further includes a voltage detection circuit 23; the voltage detection circuit 23 is respectively connected to the battery pack 10 and the control circuit 22. The voltage detection circuit 23 is used to detect the output voltage of the battery pack 10 and output the detected output voltage to the control circuit 22.

[0058] Specifically, when the voltage detection circuit 23 detects the output voltage of the battery pack 10 and outputs the output voltage to the control circuit 22, the control circuit 22 will determine whether the output voltage is in a high voltage state or a low voltage state, and output a first control signal to the primary coil adjustment module 211 based on the high voltage state or the low voltage state, so as to change the connection method of the primary side of the transformer T1 according to the first control signal.

[0059] In another embodiment, if Figure 2 As shown, the wide voltage input and output energy storage inverter 20 further includes an operating mode setting circuit 24; the operating mode setting circuit 24 is connected to the control circuit 22. The operating mode setting circuit 24 is used to receive an operation instruction and determine the operating mode of the wide voltage input and output energy storage inverter 20 based on the operation instruction.

[0060] Specifically, the working mode setting circuit 24 is used to receive user operation instructions, and determine whether the load 200 is in high voltage mode or low voltage mode (that is, high voltage input / output or low voltage input / output) according to the operation instructions, and after determining that the working mode is high voltage mode or low voltage mode, output the corresponding second control signal to the secondary coil adjustment module 212 to determine the connection method of the secondary side of the transformer T1 according to the second control signal.

[0061] In some embodiments, see Figure 3 , Figure 3 is a circuit diagram of a transformer turns ratio adjustment circuit provided by an embodiment of the utility model, such as Figure 3 As shown, the primary side of the transformer T1 includes a coil N1 and a coil N2, and the secondary side of the transformer T1 includes a coil N3 and a coil N4;

[0062] The coil N1 is connected to the primary coil regulation module 211, the coil N2 is connected to the battery pack 10 and the primary coil regulation module 211 respectively, the coil N3 is connected to the secondary coil regulation module 212, and the coil N4 is connected to the load 200 and the secondary coil regulation module 212 respectively.

[0063] In some embodiments, the coil N1 and the coil N2 may be two coils with the same winding, and the coil N3 and the coil N4 may be two coils with the same winding.

[0064] Among them, Figure 2 As shown, the primary coil adjustment module 211 includes a first primary adjustment unit 2111, a second primary adjustment unit 2112, a third primary adjustment unit 2113 and a fourth primary adjustment unit 2114;

[0065] The first end of the first primary regulation unit 2111 is connected to the battery pack 10, the second end of the first primary regulation unit 2111 is respectively connected to the coil N1 and the second primary regulation unit 2112, the second primary regulation unit 2112 is respectively connected to the coil N2 and the third primary regulation unit 2113, the third primary regulation unit 2113 is respectively connected to the battery pack 10 and the fourth primary regulation unit 2114, the fourth primary regulation unit 2114 is connected to the coil N1, and the control ends of the first primary regulation unit 2111, the second primary regulation unit 2112, the third primary regulation unit 2113 and the fourth primary regulation unit 2114 are all connected to the control circuit 22.

[0066] Specifically, when the control circuit 22 determines that the output voltage of the battery pack 10 is in a high voltage state or a low voltage state, it will output a corresponding control signal based on the state of the output voltage to the control end of the first primary side regulation unit 2111 or the second primary side regulation unit 2112 or the third primary side regulation unit 2113 or the fourth primary side regulation unit 2114, so as to change the connection mode of the coil N1 and the coil N2 through the first primary side regulation unit 2111 or the second primary side regulation unit 2112 or the third primary side regulation unit 2113 or the fourth primary side regulation unit 2114. The connection mode of the coil N1 and the coil N2 includes parallel connection or series connection.

[0067] like Figure 2 As shown, the secondary coil adjustment module 212 includes a first secondary adjustment unit 2121, a second secondary adjustment unit 2122, a third secondary adjustment unit 2123 and a fourth secondary adjustment unit 2124;

[0068] The first end of the first secondary side regulation unit 2121 is connected to the load 200, the second end of the first secondary side regulation unit 2121 is respectively connected to the second secondary side regulation unit 2122 and the coil N3, the second secondary side regulation unit 2122 is respectively connected to the coil N4 and the third secondary side regulation unit 2123, the third secondary side regulation unit 2123 is respectively connected to the load 200 and the fourth secondary side regulation unit 2124, the fourth secondary side regulation unit 2124 is connected to the coil N3, and the control ends of the first secondary side regulation unit 2121, the second secondary side regulation unit 2122, the third secondary side regulation unit 2123 and the fourth secondary side regulation unit 2124 are all connected to the control circuit 22.

[0069] Specifically, when the control circuit 22 determines the working mode of the energy storage inverter 20 with wide voltage input and output, it will output a corresponding control signal based on the working mode to the control end of the first secondary side regulation unit 2121 or the second secondary side regulation unit 2122 or the third secondary side regulation unit 2123 or the fourth secondary side regulation unit 2124, so as to change the connection mode between the coil N3 and the coil N4 through the first secondary side regulation unit 2121 or the second secondary side regulation unit 2122 or the third secondary side regulation unit 2123 or the fourth secondary side regulation unit 2124. The connection mode between the coil N3 and the coil N4 includes parallel connection or series connection.

[0070] It can be known that the coil turns ratio of the transformer T1 is equal to the voltage ratio between the primary and secondary sides of the transformer T1, and by obtaining the output voltage of the battery pack 10 and the working mode of the wide voltage input and output energy storage inverter 20, the coil connection method of the primary side of the transformer T1 can be adjusted according to the output voltage, and the connection method of the secondary side of the transformer T1 can be adjusted according to the working mode, so that when the turns ratio of the transformer T1 is the current turns ratio, the target voltage can be output to the battery pack 10 / the load 200.

[0071] In some embodiments, when the number of turns of two coils N1 and N2 with the same winding is n1, and the number of turns of two coils N3 and N4 with the same winding is n2, the original turns ratio of the secondary coil and the primary coil of the transformer T1 is set to n2:n1=1:2n; at this time, if the output voltage of the battery pack 10 is in a low voltage state and the working mode of the wide voltage input and output energy storage inverter 20 is a high voltage mode, the control circuit 22 will output a control signal to the control end of the first primary adjustment unit 2111, the second primary adjustment unit 2112 and the fourth primary coil adjustment unit 2114. At this time, if Figure 3 As shown, the switch tube Q1, the switch tube Q3 and the switch tube Q6 receive the control signal and are turned on, so that the contact group of the relay RLY1, the relay RLY5 and the relay RLY6 are closed, so that the coil N1 of the transformer T1 is connected in parallel with the coil N2 (that is, the output voltage of the battery pack 10 flows into the coil N1 (pin 1 of the transformer T1) through the relay RLY1, and also directly flows into the coil N2 (pin 2 of the transformer T1), and then flows out from the coil N1 (pin 4 of the transformer) and the relay RLY6, and from the coil N2 (pin 3 of the transformer T1) and the relay RLY5). At the same time, the control circuit 22 also outputs a control signal to the control end of the second secondary side regulation unit 2122 and the fourth secondary side regulation unit 2124. At this time, as shown in FIG. Figure 3As shown, the switch tube Q4 and the switch tube Q8 are turned on upon receiving the control signal, and the contact group of the relay RLY4 and the relay RLY8 is closed, so that the coil N3 and the coil N4 are connected in series. Based on this, the turns ratio of the primary side and the secondary side of the transformer T1 can be made 1:4n, so that when the load 200 is an electrical device, the output voltage of the battery pack 10 is boosted to meet the working voltage of the electrical device; or when the load 200 is a power grid, the power grid voltage is stepped down, so as to charge the battery pack 10 safely and reliably.

[0072] Further, such as Figure 3 As shown, at least one of the first primary regulation unit 2111, the second primary regulation unit 2112, the third primary regulation unit 2113, the fourth primary regulation unit 2114 and the first secondary regulation unit 2121, the second secondary regulation unit 2122, the third secondary regulation unit 2123, and the fourth secondary regulation unit 2124 includes a resistor R1, a resistor R3, a switch tube Q1, a relay RLY1, and a diode D1;

[0073] The control end of the switch tube Q1 is connected to the control circuit 22 through the resistor R1, and the switch tube Q1 is also grounded through the resistor R3. The first end of the switch tube Q1 is respectively connected to the coil end of the relay RLY1 and the anode of the diode D1, and the coil end of the relay RLY1 is also respectively connected to the cathode of the diode D1 and the first voltage, and the contact group of the relay RLY1 is respectively connected to the battery pack 10 / load 200 and the transformer T1.

[0074] Specifically, when the switch tube Q1 receives the first control signal or the second control signal output by the control circuit 22, the switch tube Q1 is in a conducting state based on the first control signal or the second control signal. At this time, the first voltage forms a loop through the relay RLY1 and the switch tube Q1, so that current flows through the relay RLY1, and then the contact group of the relay RLY1 is closed, so as to change the coil connection mode of the transformer T1.

[0075] In some embodiments, Figure 2 As shown, the wide voltage input and output energy storage inverter 20 also includes a drive circuit 25; the drive circuit 25 is respectively connected to the control circuit 22 and the transformer turns ratio adjustment circuit 21; the drive circuit 25 is used to receive the control signal output by the control circuit 22, and output a drive signal to the transformer turns ratio adjustment circuit 21 based on the control signal.

[0076] In some embodiments, the energy storage inverter 20 with wide voltage input and output further includes a full-bridge boost circuit (not shown) and a bidirectional inverter circuit (not shown), wherein the full-bridge boost circuit is respectively connected to the battery pack 10 and the transformer turns ratio adjustment circuit 21, and the bidirectional inverter circuit is respectively connected to the load 200 and the transformer turns ratio adjustment circuit 21. The full-bridge boost circuit is used to convert the AC input voltage into a DC voltage. The bidirectional inverter circuit is used to convert the DC input voltage into an AC voltage.

[0077] The embodiment of the utility model provides an energy storage inverter with wide voltage input and output, which includes a transformer T1, a transformer turns ratio adjustment circuit and a control circuit; the transformer T1 is connected to the transformer turns ratio adjustment circuit, the transformer turns ratio adjustment circuit is respectively connected to the control circuit and the battery pack, the control circuit is also connected to the battery pack, and the transformer turns ratio adjustment circuit is also used to connect the load. The control circuit is used to obtain the output voltage of the battery pack and the working mode of the energy storage inverter with wide voltage input and output, and control the transformer turns ratio adjustment circuit based on the output voltage and working mode to adjust the coil turns ratio of the primary and secondary sides of the transformer T1 to output the target voltage corresponding to the working mode to the load, or input the target voltage corresponding to the working mode to the battery pack. Based on this, the energy storage inverter can change the input voltage or output voltage of the energy storage inverter by changing the turns ratio of the transformer T1, thereby increasing the range of the input voltage and output voltage of the energy storage inverter.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wide voltage input and output energy storage inverter, characterized in that: The energy storage inverter with wide voltage input and output includes a transformer T1, a transformer turns ratio adjustment circuit and a control circuit; The transformer T1 is connected to the transformer turns ratio adjustment circuit, the transformer turns ratio adjustment circuit is connected to the control circuit and the battery pack respectively, the control circuit is also connected to the battery pack, and the transformer turns ratio adjustment circuit is also used to connect a load; The control circuit is used to obtain the output voltage of the battery pack and the operating mode of the wide voltage input and output energy storage inverter, and control the transformer turns ratio adjustment circuit to adjust the turns ratio of the primary and secondary coils of the transformer T1 based on the output voltage and the operating mode, so as to output the target voltage corresponding to the operating mode to the load, or input the target voltage corresponding to the operating mode to the battery pack.

2. The energy storage inverter with wide voltage input and output according to claim 1, characterized in that: The transformer turns ratio adjustment circuit includes a primary coil adjustment module and a secondary coil adjustment module; The primary coil regulation module is connected to the battery pack and the control circuit respectively, and is also connected to the primary side of the transformer T1. The secondary coil regulation module is connected to the control circuit and the load respectively, and is also connected to the secondary side of the transformer T1. The primary coil adjustment module is used to receive the first control signal output by the control circuit, and adjust the connection mode of the primary side of the transformer T1 according to the first control signal; The secondary coil adjustment module is used to receive the second control signal output by the control circuit, and adjust the connection mode of the secondary side of the transformer T1 according to the second control signal.

3. The energy storage inverter with wide voltage input and output according to claim 2, characterized in that: The primary side of the transformer T1 includes a coil N1 and a coil N2, and the secondary side of the transformer T1 includes a coil N3 and a coil N4; The coil N1 is connected to the primary coil regulation module, the coil N2 is connected to the battery pack and the primary coil regulation module respectively, the coil N3 is connected to the secondary coil regulation module, and the coil N4 is connected to the load and the secondary coil regulation module respectively.

4. The energy storage inverter with wide voltage input and output according to claim 3, characterized in that: The primary coil adjustment module includes a first primary adjustment unit, a second primary adjustment unit, a third primary adjustment unit and a fourth primary adjustment unit; The first end of the first primary regulation unit is connected to the battery pack, the second end of the first primary regulation unit is respectively connected to the coil N1 and the second primary regulation unit, the second primary regulation unit is respectively connected to the coil N2 and the third primary regulation unit, the third primary regulation unit is respectively connected to the battery pack and the fourth primary regulation unit, the fourth primary regulation unit is connected to the coil N1, and the control ends of the first primary regulation unit, the second primary regulation unit, the third primary regulation unit and the fourth primary regulation unit are all connected to the control circuit.

5. The energy storage inverter with wide voltage input and output according to claim 4, characterized in that: The secondary coil regulation module includes a first secondary regulation unit, a second secondary regulation unit, a third secondary regulation unit and a fourth secondary regulation unit; The first end of the first secondary side regulation unit is connected to the load, the second end of the first secondary side regulation unit is respectively connected to the second secondary side regulation unit and the coil N3, the second secondary side regulation unit is respectively connected to the coil N4 and the third secondary side regulation unit, the third secondary side regulation unit is respectively connected to the load and the fourth secondary side regulation unit, the fourth secondary side regulation unit is connected to the coil N3, and the control ends of the first secondary side regulation unit, the second secondary side regulation unit, the third secondary side regulation unit and the fourth secondary side regulation unit are all connected to the control circuit.

6. The energy storage inverter with wide voltage input and output according to claim 5, characterized in that: At least one of the first primary regulation unit, the second primary regulation unit, the third primary regulation unit, the fourth primary regulation unit and the first secondary regulation unit, the second secondary regulation unit, the third secondary regulation unit, and the fourth secondary regulation unit comprises a resistor R1, a resistor R3, a switch tube Q1, a relay RLY1, and a diode D1; The control end of the switch tube Q1 is connected to the control circuit through the resistor R1, and the switch tube Q1 is also grounded through the resistor R3. The first end of the switch tube Q1 is respectively connected to the coil end of the relay RLY1 and the anode of the diode D1, and the coil end of the relay RLY1 is also respectively connected to the cathode of the diode D1 and the first voltage, and the contact group of the relay RLY1 is respectively connected to the battery pack / load and the transformer T1.

7. The energy storage inverter with wide voltage input and output according to claim 1, characterized in that: The energy storage inverter with wide voltage input and output also includes a drive circuit; The driving circuit is respectively connected to the control circuit and the transformer turns ratio adjustment circuit; The driving circuit is used to receive the control signal output by the control circuit, and output a driving signal to the transformer turns ratio adjustment circuit based on the control signal.

8. The energy storage inverter with wide voltage input and output according to claim 1, characterized in that: The energy storage inverter with wide voltage input and output also includes a voltage detection circuit; The voltage detection circuit is connected to the battery pack and the control circuit respectively; The voltage detection circuit is used to detect the output voltage of the battery pack and output the detected output voltage to the control circuit.

9. The energy storage inverter with wide voltage input and output according to claim 1, characterized in that: The energy storage inverter with wide voltage input and output also includes a working mode setting circuit; The working mode setting circuit is connected to the control circuit; The working mode setting circuit is used to receive an operating instruction and determine the working mode of the energy storage inverter with a wide voltage input and output based on the operating instruction.

10. An energy storage power supply, characterized in that: The energy storage power supply comprises: Battery pack; and The energy storage inverter with a wide voltage input and output as described in any one of claims 1 to 9, wherein the energy storage inverter with a wide voltage input and output is connected to the battery pack.

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