CN219181194U - Energy storage inverter circuit - Google Patents

Abstract

The utility model relates to a power electronic technology, and provides an energy storage inverter circuit which comprises a boosting module, an inversion module, a control module, a power grid switch module and a load switch module. The inverter module is respectively connected with the boosting module, the power grid switch module and the load switch module, the control module is respectively connected with the boosting module, the inverter module, the power grid switch module and the load switch module, the power grid switch module is further connected with the power grid, and the load switch module is further connected with the load. The control module is used for acquiring external signals so as to switch the working states of the power grid switch module and the load switch module, and controlling the inversion module to switch the working modes according to the external signals so as to output target voltage; wherein the external signal is used to identify the type of load and/or grid. Through the mode, the problem of single load of the energy storage inverter can be solved, and the target voltage can be output without adding any additional circuit, so that the cost of the circuit is reduced.

Description

Energy storage inverter circuit

[ field of technology ]

The present disclosure relates to power electronics, and particularly to an energy storage inverter circuit.

[ background Art ]

With the improvement of social awareness of clean energy and the reduction of battery cost in recent years, battery energy storage products are increasingly appeared in the home of common users, and more types of power grids used on the user side exist: such as a single-phase two-wire grid, a three-phase grid. The diversity of the power grid also determines the habit of using electricity at the user side, for example, in japan, such countries, a 100V power grid is often used for low-power equipment, and a 200V power grid is used for high-power equipment. However, due to the complex system of the local power grid, the individual user side only has one system power grid of 100V or 200V, so that the individual user can only use one type of electric equipment.

Therefore, two independent output bidirectional inverters are adopted in the market, and if a user needs 100V, the two inverters execute a parallel strategy; if the user demands 200V, the two inverters execute networking strategies. But outputting the voltage by the device not only increases the complexity of the control, but also requires the provision of an additional parallel circuit. In addition, when the output of the off-grid operation is required to be 100V, a parallel circuit is also required to be added to the off-grid output end, so that the cost is increased, and meanwhile, the stability of the system is reduced.

[ utility model ]

The embodiment of the utility model mainly provides an energy storage inverter circuit, which aims to solve the technical problems of single load, high cost and low stability in the prior art.

In order to solve the technical problems, one technical scheme adopted by the embodiment of the utility model is as follows: the energy storage inverter circuit comprises a boosting module, an inversion module, a control module, a power grid switch module and a load switch module;

the first end of the inversion module is connected with the boosting module, the second end of the inversion module is respectively connected with the power grid switch module and the load switch module, and the control module is respectively connected with the boosting module, the inversion module, the power grid switch module and the load switch module;

the power grid switch module is also used for being connected with a power grid, and the load switch module is also used for being connected with a load; the control module is used for acquiring an external signal and switching the working states of the power grid switch module and the load switch module according to the external signal, wherein the external signal is used for identifying the type of the connected load and/or the power grid; and

and the inverter module is used for controlling the inverter module to switch the working mode according to the external signal so as to output target voltage through the power grid switch module and the load switch module after the power grid switch module and the load switch module are switched.

Optionally, the inverter module includes an inverter tube G1, an inverter tube G2, an inverter tube G3 and an inverter tube G4;

the first end of the inverter tube G1 is connected with the first end of the boosting module and the first end of the inverter tube G3, the second end of the inverter tube G1 is respectively connected with the first ends of the power grid switch module, the load switch module and the inverter tube G2, the second end of the inverter tube G2 is connected with the third end of the boosting module and the second end of the inverter tube G4, the second end of the inverter tube G3 is respectively connected with the first ends of the power grid switch module, the load switch module and the inverter tube G4, and the control ends of the inverter tube G1, the inverter tube G2, the inverter tube G3 and the inverter tube G4 are respectively connected with the control module;

the control module is used for controlling the on-off states of the inverter tube G1, the inverter tube G2, the inverter tube G3 and the inverter tube G4 according to the external signals so as to output target voltage to the power grid switch module and the load switch module.

Optionally, the grid switch module includes switch RY1, switch RY2, switch RY3, switch RY4, switch RY5, switch RY6, and switch RY10;

a first end of the switch RY1 is connected to a second end of the inverter G1, a second end of the switch RY1 is connected to a first end of the power grid through the switch RY4, a first connection end of the switch RY10 is connected to a second end of the boost module, a second connection end of the switch RY10 is connected to a first end of the inverter G4, a common end of the switch RY10 is connected to a second end of the power grid through the switch RY2, the switch RY5, a first end of the switch RY3 is connected to a first end of the inverter G4, a second end of the switch RY3 is connected to a third end of the power grid through the switch RY6, and the switch RY1, the switch RY2, the switch RY3, the switch RY4, the switch RY5, the switch RY6, and the switch RY10 are further connected to the control module;

the control module is used for controlling the on-off of the switch RY1, the switch RY2, the switch RY3, the switch RY4, the switch RY5, the switch RY6 and the switch RY10 according to the external signal so that the working state of the power grid switch module corresponds to the type of the power grid.

Optionally, the load switch module includes switch RY7, switch RY8, and switch RY9;

a first end of the switch RY7 is connected to a second end of the inverter G1, a second end of the switch RY7 is connected to a first end of the load, a first connection end of the switch RY8 is connected to a second end of the boost module, a second connection end of the switch RY8 is connected to a first end of the inverter G4, a common end of the switch RY8 is connected to a second end of the load, a first end of the switch RY9 is connected to a first end of the inverter G4, a second end of the switch RY9 is connected to a third end of the load, and the switch RY7, the switch RY8, and the switch RY9 are further connected to the control module;

the control module is used for controlling the on-off of the switch RY7, the switch RY8 and the switch RY9 according to the external signal so that the working state of the load switch module corresponds to the type of the load.

Optionally, the energy storage inverter circuit further includes a resonance filtering module, a first end of the resonance filtering module is connected with the inversion module and the boost module respectively, and a second end of the resonance filtering module is connected with the power grid switch module and the load switch module respectively.

Optionally, the resonant filter module includes an inductor L1, an inductor L2, a capacitor C5, a capacitor C6, and a capacitor C7;

the first end of the inductor L1 is connected with the second end of the inverter G1, the second end of the inductor L1 is connected with the first end of the capacitor C5, the first end of the capacitor C7, the first end of the switch RY1, and the first end of the switch RY7, the second end of the capacitor C5 is connected with the first end of the capacitor C6 and the second end of the boost module, the first end of the inductor L2 is connected with the first end of the inverter G4, and the second end of the inductor L2 is connected with the second end of the capacitor C6, the second end of the capacitor C7, the second connection end of the switch RY10, and the second connection end of the switch RY 8.

Optionally, the boost module includes a first switch unit, a second switch unit and a boost unit;

the first end of the first switch unit is connected with the battery, the control end of the first switch unit is connected with the control module, the second end of the first switch unit is connected with the input end of the boost unit, the output end of the boost unit is connected with the first end of the second switch unit, the second end of the second switch unit is respectively connected with the inversion module, the power grid switch module and the load switch module, and the control end of the second switch unit is connected with the control module.

Optionally, the first switching unit includes a capacitor C1, a switching tube Q2, a switching tube Q3, and a switching tube Q4;

the first end of the capacitor C1 is respectively connected with the positive electrode of the battery, the first end of the switch tube Q1 and the first end of the switch tube Q3, the second end of the capacitor C1 is respectively connected with the negative electrode of the battery, the second end of the switch tube Q2 and the second end of the switch tube Q4, the second end of the switch tube Q1 is respectively connected with the first end of the switch tube Q2 and the input end of the boosting unit, the second end of the switch tube Q3 is respectively connected with the first end of the switch tube Q4 and the input end of the boosting unit, and the control ends of the switch tube Q1, the switch tube Q2, the switch tube Q3 and the switch tube Q4 are respectively connected with the control module.

Optionally, the second switching unit includes a switching tube Q5, a switching tube Q6, a switching tube Q7, a switching tube Q8, a capacitor C3 and a capacitor C4;

the first end of the switch tube Q5 is respectively connected with the first end of the switch tube Q7, the first end of the capacitor C3 and the first end of the inversion module, the second end of the switch tube Q5 is respectively connected with the output end of the boosting unit and the first end of the switch tube Q6, the control end of the switch tube Q5 is connected with the control module, the second end of the switch tube Q6 is respectively connected with the second end of the switch tube Q8, the second end of the capacitor C4 and the first end of the inversion module, the control end of the switch tube Q6 is connected with the control module, the second end of the switch tube Q7 is respectively connected with the output end of the boosting unit and the first end of the switch tube Q8, the control end of the switch tube Q7 is connected with the control module, and the second end of the capacitor C3 is respectively connected with the first end of the capacitor C4, the load switch module and the power grid switch module.

Optionally, the boosting unit includes a transformer T1 and a capacitor C2;

the first end of the capacitor C2 is connected with the second end of the switching tube Q1, the second end of the capacitor C2 is connected with the first input end of the transformer T1, the second input end of the transformer T1 is connected with the second end of the switching tube Q3, the first output end of the transformer T1 is connected with the second end of the switching tube Q5, and the second output end of the transformer T1 is connected with the second end of the switching tube Q7.

The utility model provides an energy storage inverter circuit, which mainly comprises a boosting module, an inversion module, a control module, a power grid switch module and a load switch module. The first end of the inversion module is connected with the boosting module, the second end of the inversion module is connected with the power grid switch module and the load switch module respectively, the control module is connected with the boosting module, the inversion module, the power grid switch module and the load switch module respectively, the power grid switch module is further used for being connected with a power grid, and the load switch module is further used for being connected with a load. The control module is used for acquiring external signals, wherein the external signals are used for identifying the type of the connected load and/or the power grid, and switching the working states of the power grid switch module and the load switch module according to the external signals so that the energy storage inverter circuit can switch the corresponding load mode according to the type of the connected load and/or the power grid, and therefore the problem of single load is solved; and when the load and/or the power grid is powered, the energy storage inverter circuit only needs to control the inversion module to switch the working mode according to the external signal, and the target voltage can be output through the power grid switch module and the load switch module after the switching state, so that the target voltage can be output without adding any additional circuit, and the cost of the circuit is further reduced.

[ description of the drawings ]

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to scale, unless expressly stated otherwise.

Fig. 1 is a block diagram of an energy storage inverter circuit according to an embodiment of the present utility model;

fig. 2 is a circuit diagram of an energy storage inverter circuit according to an embodiment of the present utility model;

fig. 3 is a circuit diagram of the energy storage inverter circuit according to the embodiment of the present utility model during grid-connected operation;

fig. 4 is a circuit diagram of an inverter module according to an embodiment of the present utility model;

fig. 5 is a circuit diagram of an energy storage inverter circuit according to another embodiment of the present utility model during off-grid operation;

FIG. 6 is a block diagram of a boost module according to an embodiment of the present utility model;

fig. 7 is a circuit diagram of a boost module according to an embodiment of the present utility model.

[ detailed description ] of the utility model

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that, if not in conflict, the features of the embodiments of the present utility model may be combined with each other, which are all within the protection scope of the present utility model. In addition, although the division of the functional modules is performed in the apparatus schematic, in some cases, the division of the modules may be different from that in the apparatus schematic.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the utility model described below can be combined with one another as long as they do not conflict with one another.

Referring to fig. 1, fig. 1 is a block diagram of an energy storage inverter circuit according to an embodiment of the present utility model, and as shown in fig. 1, the energy storage inverter circuit 100 includes a boost module 10, an inverter module 20, a control module 30, a grid switch module 40 and a load switch module 50;

the first end of the inverter module 20 is connected with the boost module 10, the second end of the inverter module 20 is connected with the grid switch module 40 and the load switch module 50, the control module 30 is connected with the boost module 10, the inverter module 20, the grid switch module 40 and the load switch module 50, the grid switch module 40 is further connected with the grid 200, and the load switch module 50 is connected with the load 300. The power grid 200 refers to a national power grid, when the power grid switch module 40 is connected to the power grid 200, the energy storage inverter circuit 100 is in a grid-connected output mode, and otherwise, is in an off-grid output mode. The load 300 refers to electric equipment such as a refrigerator, a washer, etc. in a home appliance.

The voltage boosting module 10 is also connected to the battery 400, and is mainly used for boosting the voltage in the battery 400.

The control module 30 is configured to obtain an external signal, where the external signal is used to identify whether a load 300 is connected or a power grid 200 is connected, and identify a type of the connected load 300 and/or the power grid 200, and the type refers to a connection type of the power grid 200 and/or the load 300; the wiring types include single-phase two-wire, single-phase three-wire, and the like. And then controlling the power grid switch module 40 and the load switch module 50 to switch working states according to the external signals, so that the working states of the power grid switch module 40 and the load switch module 50 correspond to the types of the power grid 200 and the load 300. For example: when the identification signal is to be connected to the single-phase three-wire power load 300 and the power grid 200 is not required to be connected, the power grid switch module 40 is controlled to be in a disconnected state, that is, the power grid switch module 40 is in a stopped working state so as to disconnect the inverter module 20 from the power grid, and the load switch module 50 is controlled to be in a conducting state and in a single-phase three-wire working mode so that the inverter module 20 is connected to the load 300 and the output voltage of the inverter module 20 is matched with the working voltage required by the load 300.

In some embodiments, the external signal is obtained from HMI (Human Machine Interface, human-machine interface) and/or APP and/or WEB (World Wide WEB) and/or a local dial switch. Wherein, the control module 30 is respectively in communication connection with the HMI, the APP, the WEB and the local dial switch. When the energy storage inverter circuit 100 starts to work, the HMI, the APP or the WEB receives a first model signal sent by the HMI, the APP or the WEB reads a second model signal set by the local dial switch, and then when the first model signal is equal to the second model signal, the first model signal is confirmed to be the external signal.

In some embodiments, the switches in the grid switch module 40 and the load switch module 50 may be relays, contactors, and normal switches, among others. For example, when the switches in the grid switch module 40 and the load switch module 50 are relays, the moving contacts of the relays are connected to the inverter module 20, the stationary contacts of the relays are connected to the grid 200 and/or the load 300, and the coil terminals of the relays are connected to the control module 30. When the control module 30 obtains the external signal, a certain voltage is applied to the coil end of the corresponding relay according to the type of the external signal, and at this time, a certain current flows through the coil of the relay, so as to generate an electromagnetic effect, and further control the movable contact to be closed with the stationary contact, so that the power grid switch module 40 and the load switch module 50 switch working states.

Specifically, as shown in fig. 2, fig. 2 is a circuit diagram of an energy storage inverter circuit according to an embodiment of the present utility model; the grid switch module 40 includes switches RY1, RY2, RY3, RY4, RY5, RY6, and RY10. The first end of the switch RY1 is connected to the second end of the inverter G1, the second end of the switch RY1 is connected to the first end of the power grid 200 through the switch RY4, the first connection end of the switch RY10 is connected to the second end of the boost module 10, the second connection end of the switch RY10 is connected to the first end of the inverter G4, the common end of the switch RY10 is connected to the second end of the power grid 200 through the switch RY2, the switch RY5, the first end of the switch RY3 is connected to the first end of the inverter G4, the second end of the switch RY3 is connected to the third end of the power grid 200 through the switch RY6, and the switch RY1, the switch RY2, the switch RY3, the switch RY4, the switch RY6 and the switch RY10 are further connected to the control module 30 (not shown). Wherein the control module 30 is configured to control the on/off of the switch RY1, the switch RY2, the switch RY3, the switch RY4, the switch RY5, the switch RY6, and the switch RY10 according to the external signal, so that the operating state of the grid switch module 40 corresponds to the type of the grid 200.

As shown in fig. 2, the load switch module 50 includes a switch RY7, a switch RY8, and a switch RY9. The first end of the switch RY7 is connected to the second end of the inverter G1, the second end of the switch RY7 is connected to the first end of the load 300, the first connection end of the switch RY8 is connected to the second end of the boost module 10, the second connection end of the switch RY8 is connected to the first end of the inverter G4, the common end of the switch RY8 is connected to the second end of the load 300, the first end of the switch RY9 is connected to the first end of the inverter G4, the second end of the switch RY9 is connected to the third end of the load 300, and the switch RY7, the switch RY8, and the switch RY9 are also connected to the control module 30 (not shown). Wherein the control module 30 is configured to control the on/off of the switch RY7, the switch RY8, and the switch RY9 according to the external signal, so that the operating state of the load switch module 50 corresponds to the type of the load 300. The connection between the first connection terminal and the second connection terminal of the switch RY8 and the switch RY10 and the common terminal is determined according to an external signal, for example, when the external signal is a single-phase three-wire, the first connection terminal of the switch RY8 and the switch RY10 is connected to the common terminal.

In some embodiments, when the switches in the grid switch module 40 and the load switch module 50 are relays, as shown in fig. 3, fig. 3 is a circuit diagram of the energy storage inverter circuit provided in the embodiment of the present utility model during grid-connected operation; when the external signal acquired by the control module 30 is a single-phase two-wire system, the control module 30 controls the operating states of the grid switch module 40 and the load switch module 50 to be a single-phase two-wire system by applying a certain voltage to the coil ends of the switch RY1, the switch RY2, the switch RY4, the switch RY5, the switch RY7, the switch RY8 and the switch RY10 to control the moving and stationary contacts of the switch RY1, the switch RY2, the switch RY4, the switch RY5, the switch RY7, the switch RY8 and the switch RY10 to be closed.

Further, the control module 30 is further configured to control the inverter module 20 to switch the working mode according to the external signal, so as to convert the boosted voltage to obtain a target voltage, and input the target voltage to the grid switch module 40 and the load switch module 50. The operation modes of the inverter module 20 include half-bridge operation, H-bridge full-bridge operation, and the like. The target voltage is determined based on the external signal.

Specifically, referring to fig. 4, fig. 4 is a circuit diagram of an inverter module provided in an embodiment of the present utility model, and as shown in fig. 4, the inverter module 20 includes an inverter transistor G1, an inverter transistor G2, an inverter transistor G3, and an inverter transistor G4; the first end of the inverter tube G1 is connected with the first end of the boost module 10 and the first end of the inverter tube G3, the second end of the inverter tube G1 is connected with the first ends of the grid switch module 40, the load switch module 50 and the inverter tube G2, the second end of the inverter tube G2 is connected with the third end of the boost module 10 and the second end of the inverter tube G4, the second end of the inverter tube G3 is connected with the first ends of the grid switch module 40, the load switch module 50 and the inverter tube G4, and the control ends of the inverter tube G1, the inverter tube G2 and the inverter tube G4 are connected with the control module 30. Wherein, when the control module 30 is configured to control on-off states of the inverter tube G1, the inverter tube G2, the inverter tube G3 and the inverter tube G4 according to the external signal, the control module outputs a target voltage to the grid switch module 40 and the load switch module 50. For example, when the external signal is a received load and/or the power grid is of a single-phase three-wire system type, the control module 30 controls the inverter tube G1 to be alternately conducted with the inverter tube G2, and controls the inverter tube G3 to be alternately conducted with the inverter tube G4, wherein the on-off states of the inverter tube G1 and the inverter tube G3 are the same. And then outputs a target voltage to the grid switching module 40 and the load switching module 50 through the inverter transistors that are alternately turned on. It should be noted that, when the control module 30 drives the inverter module 20 to perform inversion to output the single-phase three-wire system or the single-phase two-wire system, or other power supply types, the control timing of the output required by the control module 30 is the prior art, and the specific control timing is not repeated in this application. In one embodiment, when the load 300 and the grid 200 are connected to the inverter circuit 20, the power usage type of the load 300 and the grid 200 is the same.

In some embodiments, referring to fig. 5, fig. 5 is a circuit diagram of an energy storage inverter circuit according to another embodiment of the present utility model during off-grid operation. When the external signal acquired by the control module 30 is a single-phase three-wire, the control module 30 controls the working mode of the inverter module 20 to be a half-bridge inverter control mode according to the external signal. Specifically, in fig. 4, the inverter tube G3 and the inverter tube G4 are alternately turned on to obtain the target voltage by controlling the inverter tube G1 and the inverter tube G2 to be alternately turned on, wherein the on-off states of the inverter tube G1 and the inverter tube G3 are the same. Then, a certain voltage is applied to the coil ends of the switch RY7, the switch RY8 and the switch RY9 according to the external signal, so that the switch RY7 and the switch RY9 are in a closed state, and the first connection end of the switch RY8 is connected with a common end, as shown in fig. 5, at this time, the load switch module 50 is in a single-phase three-wire operating state. Finally, a target voltage is output through the load switch module 50.

Referring to fig. 6, fig. 6 is a block diagram of a boost module according to an embodiment of the present utility model, and as shown in fig. 6, the boost module 10 includes a first switch unit 11, a second switch unit 12, and a boost unit 13; the first end of the first switch unit 11 is connected with the battery 400, the control end of the first switch unit 11 is connected with the control module 30, the second end of the first switch unit 11 is connected with the input end of the boost unit 13, the output end of the boost unit 13 is connected with the first end of the second switch unit 12, the second end of the second switch unit 12 is respectively connected with the inverter module 20, the grid switch module 40 and the load switch module 50, and the control end of the second switch unit 12 is connected with the control module 30.

Specifically, referring to fig. 7, fig. 7 is a circuit diagram of a boost module provided by an embodiment of the present utility model, as shown in fig. 7, the first switch unit 11 includes a capacitor C1, a switch tube Q2, a switch tube Q3, and a switch tube Q4; the first end of the capacitor C1 is connected with the positive electrode of the battery 400, the first end of the switch tube Q1 and the first end of the switch tube Q3, the second end of the capacitor C1 is connected with the negative electrode of the battery 400, the second end of the switch tube Q2 and the second end of the switch tube Q4, the second end of the switch tube Q1 is connected with the first end of the switch tube Q2 and the input end of the boost unit 13, the second end of the switch tube Q3 is connected with the first end of the switch tube Q4 and the input end of the boost unit 13, and the control ends of the switch tube Q1, the switch tube Q2, the switch tube Q3 and the switch tube Q4 are connected with the control module 30.

As shown in fig. 7, the second switching unit 12 includes a switching tube Q5, a switching tube Q6, a switching tube Q7, a switching tube Q8, a capacitor C3, and a capacitor C4; the first end of the switch tube Q5 is connected with the first end of the switch tube Q7, the first end of the capacitor C3, and the first end of the inverter module 20, the second end of the switch tube Q5 is connected with the output end of the boost unit 13 and the first end of the switch tube Q6, the control end of the switch tube Q5 is connected with the control module 30, the second end of the switch tube Q6 is connected with the second end of the switch tube Q8, the second end of the capacitor C4, and the first end of the inverter module 20, the control end of the switch tube Q6 is connected with the control module 30, the second end of the switch tube Q7 is connected with the output end of the boost unit 13 and the first end of the switch tube Q8, the control end of the switch tube Q8 is connected with the control module 30, and the second end of the capacitor C3 is connected with the first end of the capacitor C4, the load switch module 50, and the power grid module 40. It should be noted that, the first end of the switching tube Q7 is the first end of the boost module 10, the second end of the capacitor C3 is the second end of the boost module 10, and the second end of the switching tube Q8 is the third end of the boost module 10.

As shown in fig. 7, the boosting unit 13 includes a transformer T1 and a capacitor C2; the first end of the capacitor C2 is connected with the second end of the switching tube Q1, the second end of the capacitor C2 is connected with the first input end of the transformer T1, the second input end of the transformer T1 is connected with the second end of the switching tube Q3, the first output end of the transformer T1 is connected with the second end of the switching tube Q5, and the second output end of the transformer T1 is connected with the second end of the switching tube Q7.

In some embodiments, as shown in fig. 1, the energy storage inverter circuit 100 further includes a resonant filter module 60, where a first end of the resonant filter module 60 is connected to the boost module 10 and the inverter module 20, respectively, and a second end of the resonant filter module 60 is connected to the grid switch module 40 and the load switch module 50, respectively. The resonance filtering module 60 is configured to filter out an interference signal in the target voltage output by the inverter module 20, so as to improve stability of the energy storage inverter circuit 100.

Specifically, as shown in fig. 2, the resonant filter module 60 includes an inductor L1, an inductor L2, a capacitor C5, a capacitor C6, and a capacitor C7; the first end of the inductor L1 is connected to the second end of the inverter G1, the second end of the inductor L1 is connected to the first end of the capacitor C5, the first end of the capacitor C7, the first end of the switch RY1, and the first end of the switch RY7, the second end of the capacitor C5 is connected to the first end of the capacitor C6 and the second end of the boost module 10, the first end of the inductor L2 is connected to the first end of the inverter G4, and the second end of the inductor L2 is connected to the second end of the capacitor C6, the second end of the capacitor C7, the first connection end of the switch RY10, and the first connection end of the switch RY 8.

The utility model provides an energy storage inverter circuit which mainly comprises a boosting module, an inversion module, a control module, a power grid switch module and a load switch module. The first end of the inversion module is connected with the boosting module, the second end of the inversion module is connected with the power grid switch module and the load switch module respectively, the control module is connected with the boosting module, the inversion module, the power grid switch module and the load switch module respectively, the power grid switch module is further used for being connected with a power grid, and the load switch module is further used for being connected with a load. The control module is used for acquiring external signals, wherein the external signals are used for identifying the type of the connected load and/or the power grid, and switching the working states of the power grid switch module and the load switch module according to the external signals, so that the energy storage inverter circuit can switch the corresponding load mode according to the type of the connected load and/or the power grid, and the problem of single load is solved; and when the load and/or the power grid is powered, the energy storage inverter circuit can output target voltage through the power grid switch module and the load switch module after the state is switched only by controlling the inverter module to switch the working mode through the control module according to the external signal, so that the target voltage can be output without adding any additional circuit, and the cost of the circuit is reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the utility model, the steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The energy storage inverter circuit is characterized by comprising a boosting module, an inversion module, a control module, a power grid switch module and a load switch module;

the first end of the inversion module is connected with the boosting module, the second end of the inversion module is respectively connected with the power grid switch module and the load switch module, and the control module is respectively connected with the boosting module, the inversion module, the power grid switch module and the load switch module;

the power grid switch module is also used for being connected with a power grid, and the load switch module is also used for being connected with a load; the control module is used for acquiring an external signal and switching the working states of the power grid switch module and the load switch module according to the external signal, wherein the external signal is used for identifying the type of the connected load and/or the power grid; and

and the inverter module is used for controlling the inverter module to switch the working mode according to the external signal so as to output target voltage through the power grid switch module and the load switch module after the power grid switch module and the load switch module are switched.

2. The energy storage inverter circuit of claim 1, wherein the inverter module comprises an inverter tube G1, an inverter tube G2, an inverter tube G3, and an inverter tube G4;

the first end of the inverter tube G1 is connected with the first end of the boosting module and the first end of the inverter tube G3, the second end of the inverter tube G1 is respectively connected with the first ends of the power grid switch module, the load switch module and the inverter tube G2, the second end of the inverter tube G2 is connected with the third end of the boosting module and the second end of the inverter tube G4, the second end of the inverter tube G3 is respectively connected with the first ends of the power grid switch module, the load switch module and the inverter tube G4, and the control ends of the inverter tube G1, the inverter tube G2, the inverter tube G3 and the inverter tube G4 are respectively connected with the control module;

the control module is used for controlling the on-off states of the inverter tube G1, the inverter tube G2, the inverter tube G3 and the inverter tube G4 according to the external signals so as to output target voltage to the power grid switch module and the load switch module.

3. The energy storage inverter circuit of claim 2, wherein the grid switch module comprises switch RY1, switch RY2, switch RY3, switch RY4, switch RY5, switch RY6, and switch RY10;

a first end of the switch RY1 is connected to a second end of the inverter G1, a second end of the switch RY1 is connected to a first end of the power grid through the switch RY4, a first connection end of the switch RY10 is connected to a second end of the boost module, a second connection end of the switch RY10 is connected to a first end of the inverter G4, a common end of the switch RY10 is connected to a second end of the power grid through the switch RY2, the switch RY5, a first end of the switch RY3 is connected to a first end of the inverter G4, a second end of the switch RY3 is connected to a third end of the power grid through the switch RY6, and the switch RY1, the switch RY2, the switch RY3, the switch RY4, the switch RY5, the switch RY6, and the switch RY10 are further connected to the control module;

the control module is used for controlling the on-off of the switch RY1, the switch RY2, the switch RY3, the switch RY4, the switch RY5, the switch RY6 and the switch RY10 according to the external signal so that the working state of the power grid switch module corresponds to the type of the power grid.

4. The energy storage inverter circuit of claim 3, wherein the load switch module comprises switch RY7, switch RY8, and switch RY9;

a first end of the switch RY7 is connected to a second end of the inverter G1, a second end of the switch RY7 is connected to a first end of the load, a first connection end of the switch RY8 is connected to a second end of the boost module, a second connection end of the switch RY8 is connected to a first end of the inverter G4, a common end of the switch RY8 is connected to a second end of the load, a first end of the switch RY9 is connected to a first end of the inverter G4, a second end of the switch RY9 is connected to a third end of the load, and the switch RY7, the switch RY8, and the switch RY9 are further connected to the control module;

the control module is used for controlling the on-off of the switch RY7, the switch RY8 and the switch RY9 according to the external signal so that the working state of the load switch module corresponds to the type of the load.

5. The energy storage inverter circuit of claim 4, further comprising a resonant filter module, a first end of the resonant filter module being connected to the inverter module and the boost module, respectively, and a second end of the resonant filter module being connected to the grid switch module and the load switch module, respectively.

6. The energy storage inverter circuit of claim 5, wherein the resonant filter module comprises an inductance L1, an inductance L2, a capacitance C5, a capacitance C6, and a capacitance C7;

the first end of the inductor L1 is connected with the second end of the inverter G1, the second end of the inductor L1 is connected with the first end of the capacitor C5, the first end of the capacitor C7, the first end of the switch RY1, and the first end of the switch RY7, the second end of the capacitor C5 is connected with the first end of the capacitor C6 and the second end of the boost module, the first end of the inductor L2 is connected with the first end of the inverter G4, and the second end of the inductor L2 is connected with the second end of the capacitor C6, the second end of the capacitor C7, the second connection end of the switch RY10, and the second connection end of the switch RY 8.

7. The energy storage inverter circuit of claim 1, wherein the boost module comprises a first switching unit, a second switching unit, and a boost unit;

the first end of the first switch unit is connected with the battery, the control end of the first switch unit is connected with the control module, the second end of the first switch unit is connected with the input end of the boost unit, the output end of the boost unit is connected with the first end of the second switch unit, the second end of the second switch unit is respectively connected with the inversion module, the power grid switch module and the load switch module, and the control end of the second switch unit is connected with the control module.

8. The energy storage inverter circuit of claim 7, wherein the first switching unit comprises a capacitor C1, a switching tube Q2, a switching tube Q3, and a switching tube Q4;

the first end of the capacitor C1 is respectively connected with the positive electrode of the battery, the first end of the switch tube Q1 and the first end of the switch tube Q3, the second end of the capacitor C1 is respectively connected with the negative electrode of the battery, the second end of the switch tube Q2 and the second end of the switch tube Q4, the second end of the switch tube Q1 is respectively connected with the first end of the switch tube Q2 and the input end of the boosting unit, the second end of the switch tube Q3 is respectively connected with the first end of the switch tube Q4 and the input end of the boosting unit, and the control ends of the switch tube Q1, the switch tube Q2, the switch tube Q3 and the switch tube Q4 are respectively connected with the control module.

9. The energy storage inverter circuit of claim 8, wherein the second switching unit comprises a switching tube Q5, a switching tube Q6, a switching tube Q7, a switching tube Q8, a capacitor C3, and a capacitor C4;

the first end of the switch tube Q5 is respectively connected with the first end of the switch tube Q7, the first end of the capacitor C3 and the first end of the inversion module, the second end of the switch tube Q5 is respectively connected with the output end of the boosting unit and the first end of the switch tube Q6, the control end of the switch tube Q5 is connected with the control module, the second end of the switch tube Q6 is respectively connected with the second end of the switch tube Q8, the second end of the capacitor C4 and the first end of the inversion module, the control end of the switch tube Q6 is connected with the control module, the second end of the switch tube Q7 is respectively connected with the output end of the boosting unit and the first end of the switch tube Q8, the control end of the switch tube Q7 is connected with the control module, and the second end of the capacitor C3 is respectively connected with the first end of the capacitor C4, the load switch module and the power grid switch module.

10. The energy storage inverter circuit of claim 9, wherein the boost unit comprises a transformer T1 and a capacitor C2;

the first end of the capacitor C2 is connected with the second end of the switching tube Q1, the second end of the capacitor C2 is connected with the first input end of the transformer T1, the second input end of the transformer T1 is connected with the second end of the switching tube Q3, the first output end of the transformer T1 is connected with the second end of the switching tube Q5, and the second output end of the transformer T1 is connected with the second end of the switching tube Q7.

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